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37 changed files with 5 additions and 4013 deletions
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4
F3:F303/MLX90640/mlx90640_regs.h
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@ -43,6 +43,7 @@
#define REG_CONTROL_SUBPSEL (1<<3)
#define REG_CONTROL_DATAHOLD (1<<2)
#define REG_CONTROL_SUBPEN (1<<0)
#define REG_MLXADDR 0x8010
#define REG_MLXADDR_MASK (0xff)
// default value
@ -52,9 +53,6 @@
#define REG_CALIDATA 0x2400
#define REG_CALIDATA_LEN 832
// address in EEPROM (writing to 0x8010 will only change address in RAM)
#define REG_MLXADDR 0x240f
#define REG_APTATOCCS 0x2410
#define REG_OSAVG 0x2411
#define REG_OCCROW14 0x2412

22
F3:F303/MLX90640/mlxproc.c
View File

@ -148,27 +148,9 @@ int mlx_sethwaddr(uint8_t addr){
if(addr > 0x7f) return 0;
uint16_t data[2], *ptr;
if(!(ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0))) return 0;
//U("Old address: "); USND(uhex2str(*ptr));
data[0] = REG_MLXADDR; data[1] = 0;
uint16_t oldreg = *ptr;
if(!i2c_write(MLX_address, data, 2)) return 0; // clear address
uint32_t Told = Tms;
while(Tms - Told < 10);
ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0);
// should be zero
if(!ptr){
data[0] = REG_MLXADDR; data[1] = oldreg;
i2c_write(MLX_address, data, 2); // leave old address
return 0;
}
data[0] = REG_MLXADDR; // i2c_write swaps bytes, so we need init data again
data[1] = (oldreg & ~REG_MLXADDR_MASK) | addr;
//U("Write address: "); U(uhex2str(data[0])); U(", "); USND(uhex2str(data[1]));
data[0] = REG_MLXADDR;
data[1] = (*ptr & ~REG_MLXADDR_MASK) | addr;
if(!i2c_write(MLX_address, data, 2)) return 0;
while(Tms - Told < 10);
if(!(ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0))) return 0;
//U("Got address: "); USND(uhex2str(*ptr));
if((*ptr & REG_MLXADDR_MASK) != addr) return 0;
return 1;
}

12
F3:F303/MLX90640/proto.c
View File

@ -77,16 +77,8 @@ TRUE_INLINE const char *chhwaddr(const char *buf){
uint32_t a;
if(buf && *buf){
const char *nxt = getnum(buf, &a);
if(nxt && nxt != buf){
if(!mlx_sethwaddr(a)) return ERR;
}else{
USND("Wrong number");
return ERR;
}
}else{
USND("Need address");
return ERR;
}
if(nxt && nxt != buf) if(!mlx_sethwaddr(a)) return ERR;
} else return ERR;
return OK;
}

10
F3:F303/MLX90640multi/Makefile
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@ -1,10 +0,0 @@
BINARY := mlx90640
# MCU code
MCU := F303xb
# change this linking script depending on particular MCU model,
LDSCRIPT := stm32f303xB.ld
DEFINES := -DUSB1_16
LDLIBS := -lm
include ../makefile.f3
include ../../makefile.stm32

35
F3:F303/MLX90640multi/Readme.md
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@ -1,35 +0,0 @@
Works with several MLX90640 sensors
=================================
When attached, udev will create symlink /dev/mlx_sensor0. This is the udev rule:
```
ACTION=="add", ENV{USB_IDS}=="0483:5740", ATTRS{interface}=="?*", PROGRAM="/bin/bash -c \"ls /dev | grep $attr{interface} | wc -l \"", SYMLINK+="$attr{interface}%c", MODE="0666", GROUP="tty"
```
Protocol:
```
aa - change I2C address to a (a should be non-shifted value!!!)
c - continue MLX
d - draw image in ASCII
i0..4 - setup I2C with speed 10k, 100k, 400k, 1M or 2M (experimental!)
p - pause MLX
r0..3 - change resolution (0 - 16bit, 3 - 19-bit)
t - show temperature map
C - "cartoon" mode on/off (show each new image)
D - dump MLX parameters
G - get MLX state
Ia addr - set device address
Ir reg n - read n words from 16-bit register
Iw words - send words (hex/dec/oct/bin) to I2C
Is - scan I2C bus
T - print current Tms
```
To call this help just print '?', 'h' or 'H' in terminal.

34
F3:F303/MLX90640multi/hardware.c
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@ -1,34 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "hardware.h"
static inline void gpio_setup(){
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN; // for USART and LEDs
for(int i = 0; i < 10000; ++i) nop();
// USB - alternate function 14 @ pins PA11/PA12; SWD - AF0 @PA13/14
GPIOA->AFR[1] = AFRf(14, 11) | AFRf(14, 12);
GPIOA->MODER = MODER_AF(11) | MODER_AF(12) | MODER_AF(13) | MODER_AF(14) | MODER_O(15);
GPIOB->MODER = MODER_O(0) | MODER_O(1);
GPIOB->ODR = 1;
}
void hw_setup(){
gpio_setup();
}

31
F3:F303/MLX90640multi/hardware.h
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@ -1,31 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stm32f3.h>
#define USBPU_port GPIOA
#define USBPU_pin (1<<15)
#define USBPU_ON() pin_clear(USBPU_port, USBPU_pin)
#define USBPU_OFF() pin_set(USBPU_port, USBPU_pin)
extern volatile uint32_t Tms;
void hw_setup();

382
F3:F303/MLX90640multi/i2c.c
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@ -1,382 +0,0 @@
/*
* This file is part of the i2cscan project.
* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stm32f3.h>
#include <string.h>
#include "i2c.h"
#include "strfunc.h" // hexdump
#include "usb_dev.h"
i2c_speed_t i2c_curspeed = I2C_SPEED_AMOUNT;
extern volatile uint32_t Tms;
static uint32_t cntr;
volatile uint8_t i2c_scanmode = 0; // == 1 when I2C is in scan mode
static volatile uint8_t i2c_got_DMA = 0; // got DMA data
static uint8_t i2caddr = I2C_ADDREND; // current address in scan mode
static volatile int I2Cbusy = 0, goterr = 0; // busy==1 when DMA active, goterr==1 if 't was error @ last sent
static uint16_t I2Cbuf[I2C_BUFSIZE];
static uint16_t i2cbuflen = 0; // buffer for DMA rx and its len
static volatile uint16_t dma_remain = 0; // remain bytes of DMA read/write
// macros for I2C rx/tx
#define DMARXCCR (DMA_CCR_MINC | DMA_CCR_TCIE | DMA_CCR_TEIE)
#define DMATXCCR (DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_TCIE | DMA_CCR_TEIE)
// macro for I2CCR1
#define I2CCR1 (I2C_CR1_PE | I2C_CR1_RXDMAEN | I2C_CR1_TXDMAEN)
// return 1 if I2Cbusy is set & timeout reached
static inline int isI2Cbusy(){
cntr = Tms;
do{
if(Tms - cntr > I2C_TIMEOUT){ U("Timeout, DMA transfer in progress?"); return 1;}
}while(I2Cbusy);
return 0;
}
static void swapbytes(uint16_t *data, uint16_t datalen){
if(!datalen) return;
for(int i = 0; i < datalen; ++i)
data[i] = __REV16(data[i]);
}
// GPIO Resources: I2C1_SCL - PB6 (AF4), I2C1_SDA - PB7 (AF4)
void i2c_setup(i2c_speed_t speed){
uint8_t PRESC, SCLDEL = 0x04, SDADEL = 0x03, SCLH, SCLL; // I2C1->TIMINGR fields
switch(speed){
case I2C_SPEED_10K:
PRESC = 0x0F;
SCLH = 0xDA;
SCLL = 0xE0;
break;
case I2C_SPEED_100K:
PRESC = 0x0F;
SCLH = 0x13;
SCLL = 0x16;
break;
case I2C_SPEED_400K:
PRESC = 0x07;
SCLH = 0x08;
SCLL = 0x09;
break;
case I2C_SPEED_1M:
SDADEL = 1;
SCLDEL = 2;
PRESC = 0x3;
SCLH = 0x4;
SCLL = 0x6;
break;
case I2C_SPEED_2M:
SDADEL = 0;
SCLDEL = 1;
PRESC = 0x0;
SCLH = 0x1;
SCLL = 0x2;
break;
default:
USND("Wrong I2C speed!");
return; // wrong speed
}
RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
I2C1->CR1 = 0; // disable I2C for setup
I2C1->ICR = 0x3f38; // clear all errors
GPIOB->AFR[0] = (GPIOB->AFR[0] & ~(GPIO_AFRL_AFRL6 | GPIO_AFRL_AFRL7)) |
AFRf(4, 6) | AFRf(4, 7);
GPIOB->MODER = (GPIOB->MODER & ~(GPIO_MODER_MODER6 | GPIO_MODER_MODER7)) |
MODER_AF(6) | MODER_AF(7);
GPIOB->PUPDR = (GPIOB->PUPDR & !(GPIO_PUPDR_PUPDR6 | GPIO_PUPDR_PUPDR7)) |
PUPD_PU(6) | PUPD_PU(7); // pullup (what if there's no external pullup?)
GPIOB->OTYPER |= OTYPER_OD(6) | OTYPER_OD(7); // both open-drain outputs
GPIOB->OSPEEDR = (GPIOB->OSPEEDR & OSPEED_CLR(6) & OSPEED_CLR(7)) |
OSPEED_HI(6) | OSPEED_HI(7);
// I2C (default timing from sys clock - 72MHz)
RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; // clocking
if(speed < I2C_SPEED_400K){ // slow cpeed - common mode
SYSCFG->CFGR1 &= ~(SYSCFG_CFGR1_I2C1_FMP | SYSCFG_CFGR1_I2C_PB6_FMP | SYSCFG_CFGR1_I2C_PB7_FMP);
}else{ // activate "fast mode plus"
SYSCFG->CFGR1 |= SYSCFG_CFGR1_I2C1_FMP | SYSCFG_CFGR1_I2C_PB6_FMP | SYSCFG_CFGR1_I2C_PB7_FMP;
}
I2C1->TIMINGR = (PRESC<<I2C_TIMINGR_PRESC_Pos) | (SCLDEL<<I2C_TIMINGR_SCLDEL_Pos) |
(SDADEL<<I2C_TIMINGR_SDADEL_Pos) | (SCLH<<I2C_TIMINGR_SCLH_Pos) | (SCLL<< I2C_TIMINGR_SCLL_Pos);
I2C1->CR1 = I2CCR1;
RCC->AHBENR |= RCC_AHBENR_DMA1EN;
NVIC_EnableIRQ(DMA1_Channel6_IRQn);
NVIC_EnableIRQ(DMA1_Channel7_IRQn);
I2Cbusy = 0;
i2c_curspeed = speed;
}
// setup DMA for rx (tx==0) or tx (tx==1)
// DMA channels: 7 - I2C1_Rx, 6 - I2C1_Tx
static void i2cDMAsetup(int tx, uint16_t len){
i2cbuflen = len;
if(len > 255) len = 255;
if(tx){
DMA1_Channel6->CCR = DMATXCCR;
DMA1_Channel6->CPAR = (uint32_t) &I2C1->TXDR;
DMA1_Channel6->CMAR = (uint32_t) I2Cbuf;
DMA1_Channel6->CNDTR = len;
}else{
DMA1_Channel7->CCR = DMARXCCR;
DMA1_Channel7->CPAR = (uint32_t) &I2C1->RXDR;
DMA1_Channel7->CMAR = (uint32_t) I2Cbuf;
DMA1_Channel7->CNDTR = len;
}
}
// wait until bit set or clear; return 1 if OK, 0 in case of timeout
static uint8_t waitISRbit(uint32_t bit, uint8_t isset){
uint32_t waitwhile = (isset) ? 0 : bit; // wait until !=
cntr = Tms;
while((I2C1->ISR & bit) == waitwhile){
IWDG->KR = IWDG_REFRESH;
if(I2C1->ISR & I2C_ISR_NACKF){
goto goterr;
}
if(Tms - cntr > I2C_TIMEOUT){
goto goterr;
}
}
return 1;
goterr:
I2C1->ICR = 0xff;
return 0;
}
// start writing
static uint8_t i2c_startw(uint8_t addr, uint8_t nbytes, uint8_t stop){
if(!waitISRbit(I2C_ISR_BUSY, 0)) return 0;
uint32_t cr2 = nbytes << 16 | addr | I2C_CR2_START;
if(stop) cr2 |= I2C_CR2_AUTOEND;
// now start transfer
I2C1->CR2 = cr2;
return 1;
}
/**
* write command byte to I2C
* @param addr - device address
* @param data - bytes to write
* @param nbytes - amount of bytes to write
* @param stop - to set STOP
* @return 0 if error
*/
static uint8_t i2c_writes(uint8_t addr, uint8_t *data, uint8_t nbytes, uint8_t stop){
if(!i2c_startw(addr, nbytes, stop)) return 0;
for(int i = 0; i < nbytes; ++i){
cntr = Tms;
while(!(I2C1->ISR & I2C_ISR_TXIS)){ // ready to transmit
IWDG->KR = IWDG_REFRESH;
if(I2C1->ISR & I2C_ISR_NACKF){
I2C1->ICR |= I2C_ICR_NACKCF;
return 0;
}
if(Tms - cntr > I2C_TIMEOUT){
return 0;
}
}
I2C1->TXDR = data[i]; // send data
}
cntr = Tms;
if(stop){
if(!waitISRbit(I2C_ISR_BUSY, 0)) return 0;
}else{ // repeated start
if(!waitISRbit(I2C_ISR_TC, 1)) return 0;
}
return 1;
}
uint8_t i2c_write(uint8_t addr, uint16_t *data, uint8_t nwords){
if(nwords < 1 || nwords > 127) return 0;
if(isI2Cbusy()) return 0;
uint16_t nbytes = nwords << 1;
swapbytes(data, nwords);
return i2c_writes(addr, (uint8_t*)data, nbytes, 1);
}
uint8_t i2c_write_dma16(uint8_t addr, uint16_t *data, uint8_t nwords){
if(!data || nwords < 1 || nwords > 127) return 0;
if(isI2Cbusy()) return 0;
uint16_t nbytes = nwords << 1;
swapbytes(data, nwords);
i2cDMAsetup(1, nbytes);
goterr = 0;
if(!i2c_startw(addr, nbytes, 1)) return 0;
I2Cbusy = 1;
DMA1_Channel6->CCR = DMATXCCR | DMA_CCR_EN; // start transfer
return 1;
}
// start reading of `nbytes` from `addr`; if `start`==`, set START
static uint8_t i2c_startr(uint8_t addr, uint16_t nbytes, uint8_t start){
uint32_t cr2 = addr | I2C_CR2_RD_WRN;
if(nbytes > 255) cr2 |= I2C_CR2_RELOAD | (0xff0000);
else cr2 |= I2C_CR2_AUTOEND | (nbytes << 16);
I2C1->CR2 = (start) ? cr2 | I2C_CR2_START : cr2;
return 1;
}
/**
* read nbytes of data from I2C line
* all functions with `addr` should have addr = address << 1
* `data` should be an array with at least `nbytes` length
* @return 1 if all OK, 0 if NACK or no device found
*/
static uint8_t *i2c_readb(uint8_t addr, uint16_t nbytes){
uint8_t start = 1;
uint8_t *bptr = (uint8_t*)I2Cbuf;
while(nbytes){
if(!i2c_startr(addr, nbytes, start)) return NULL;
if(nbytes < 256){
for(int i = 0; i < nbytes; ++i){
if(!waitISRbit(I2C_ISR_RXNE, 1)) return NULL;
*bptr++ = I2C1->RXDR;
}
break;
}else while(!(I2C1->ISR & I2C_ISR_TCR)){ // until first part read
if(!waitISRbit(I2C_ISR_RXNE, 1)) return NULL;
*bptr++ = I2C1->RXDR;
}
nbytes -= 255;
start = 0;
}
return (uint8_t*)I2Cbuf;
}
uint8_t *i2c_read(uint8_t addr, uint16_t nbytes){
if(isI2Cbusy() || !waitISRbit(I2C_ISR_BUSY, 0) || nbytes < 1 || nbytes > I2C_BUFSIZE*2) return 0;
return i2c_readb(addr, nbytes);
}
static uint8_t dmard(uint8_t addr, uint16_t nbytes){
if(nbytes < 1 || nbytes > I2C_BUFSIZE*2) return 0;
i2cDMAsetup(0, nbytes);
goterr = 0;
i2c_got_DMA = 0;
(void) I2C1->RXDR; // avoid wrong first byte
DMA1_Channel7->CCR = DMARXCCR | DMA_CCR_EN; // init DMA before START sequence
if(!i2c_startr(addr, nbytes, 1)) return 0;
dma_remain = nbytes > 255 ? nbytes - 255 : 0; // remainder after first read finish
I2Cbusy = 1;
return 1;
}
uint8_t i2c_read_dma16(uint8_t addr, uint16_t nwords){
if(nwords > I2C_BUFSIZE) return 0; // what if `nwords` is very large? we should check it
if(isI2Cbusy() || !waitISRbit(I2C_ISR_BUSY, 0)) return 0;
return dmard(addr, nwords<<1);
}
// read 16bit register reg
uint16_t *i2c_read_reg16(uint8_t addr, uint16_t reg16, uint16_t nwords, uint8_t isdma){
if(isI2Cbusy() || !waitISRbit(I2C_ISR_BUSY, 0) || nwords < 1 || nwords > I2C_BUFSIZE) return 0;
reg16 = __REV16(reg16);
if(!i2c_writes(addr, (uint8_t*)&reg16, 2, 0)) return NULL;
if(isdma){
if(dmard(addr, nwords<<1)) return I2Cbuf;
return NULL;
}
if(!i2c_readb(addr, nwords<<1)) return NULL;
swapbytes((uint16_t*)I2Cbuf, nwords);
return (uint16_t*)I2Cbuf;
}
void i2c_init_scan_mode(){
i2caddr = 1; // start from 1 as 0 is a broadcast address
i2c_scanmode = 1;
}
// return 1 if next addr is active & return in as `addr`
// if addresses are over, return 1 and set addr to I2C_NOADDR
// if scan mode inactive, return 0 and set addr to I2C_NOADDR
int i2c_scan_next_addr(uint8_t *addr){
if(isI2Cbusy()) return 0;
*addr = i2caddr;
if(i2caddr == I2C_ADDREND){
*addr = I2C_ADDREND;
i2c_scanmode = 0;
return 0;
}
if(!i2c_read((i2caddr++)<<1, 1)) return 0;
return 1;
}
// dump I2Cbuf
void i2c_bufdudump(){
if(goterr){
USND("DMARDERR");
goterr = 0;
}
if(i2cbuflen < 1) return;
USND("DMARD=");
hexdump16(USB_sendstr, (uint16_t*)I2Cbuf, i2cbuflen);
}
// get DMA buffer with conversion to little-endian (if transfer was for 16-bit)
uint16_t *i2c_dma_getbuf(uint16_t *len){
if(!i2c_got_DMA || i2cbuflen < 1) return NULL;
i2c_got_DMA = 0;
i2cbuflen >>= 1; // for hexdump16 - now buffer have uint16_t!
swapbytes((uint16_t*)I2Cbuf, i2cbuflen);
if(len) *len = i2cbuflen;
return I2Cbuf;
}
int i2c_dma_haderr(){
int r = goterr;
goterr = 0;
return r;
}
int i2c_busy(){ return I2Cbusy;}
// Rx (7) /Tx (6) interrupts
static void I2C_isr(int rx){
uint32_t isr = DMA1->ISR;
DMA_Channel_TypeDef *ch = (rx) ? DMA1_Channel7 : DMA1_Channel6;
ch->CCR &= ~DMA_CCR_EN; // clear enable for further settings
if(isr & (DMA_ISR_TEIF6 | DMA_ISR_TEIF7)){
goterr = 1; goto ret;
}
if(dma_remain){ // receive/send next portion
uint16_t len = (dma_remain > 255) ? 255 : dma_remain;
ch->CNDTR = len;
if(rx){
if(!i2c_startr(0, dma_remain, 0)){
goterr = 1; goto ret;
}
ch->CMAR += 255;
}
dma_remain -= len;
ch->CCR |= DMA_CCR_EN;
DMA1->IFCR = DMA_IFCR_CTCIF6 | DMA_IFCR_CTCIF7;
return;
}else if(rx) i2c_got_DMA = 1; // last transfer was Rx and all data read
ret:
ch->CCR = 0;
I2Cbusy = 0;
DMA1->IFCR = 0x0ff00000; // clear all flags for channel6/7
}
void dma1_channel6_isr(){
I2C_isr(0);
}
void dma1_channel7_isr(){
I2C_isr(1);
}

57
F3:F303/MLX90640multi/i2c.h
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@ -1,57 +0,0 @@
/*
* This file is part of the i2cscan project.
* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#define I2C_ADDREND (0x80)
// size in words
#define I2C_BUFSIZE (1024)
typedef enum{
I2C_SPEED_10K,
I2C_SPEED_100K,
I2C_SPEED_400K,
I2C_SPEED_1M,
I2C_SPEED_2M, // EXPERIMENTAL! Could be unstable!!! (speed near 1.9Mbaud)
I2C_SPEED_AMOUNT
} i2c_speed_t;
extern i2c_speed_t i2c_curspeed;
extern volatile uint8_t i2c_scanmode;
// timeout of I2C bus in ms
#define I2C_TIMEOUT (5)
void i2c_setup(i2c_speed_t speed);
int i2c_busy();
uint8_t *i2c_read(uint8_t addr, uint16_t nbytes);
uint8_t i2c_read_dma16(uint8_t addr, uint16_t nwords);
uint16_t *i2c_read_reg16(uint8_t addr, uint16_t reg16, uint16_t nwords, uint8_t isdma);
uint8_t i2c_write(uint8_t addr, uint16_t *data, uint8_t nwords);
uint8_t i2c_write_dma16(uint8_t addr, uint16_t *data, uint8_t nwords);
void i2c_bufdudump();
int i2c_dma_haderr();
uint16_t *i2c_dma_getbuf(uint16_t *len);
int i2c_getwords(uint16_t *buf, int bufsz);
void i2c_init_scan_mode();
int i2c_scan_next_addr(uint8_t *addr);

80
F3:F303/MLX90640multi/main.c
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@ -1,80 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "hardware.h"
#include "i2c.h"
#include "mlxproc.h"
#include "proto.h"
#include "strfunc.h"
#include "usb_dev.h"
#define MAXSTRLEN RBINSZ
volatile uint32_t Tms = 0;
void sys_tick_handler(void){
++Tms;
}
int main(void){
char inbuff[MAXSTRLEN+1];
if(StartHSE()){
SysTick_Config((uint32_t)72000); // 1ms
}else{
StartHSI();
SysTick_Config((uint32_t)48000); // 1ms
}
USBPU_OFF();
hw_setup();
i2c_setup(I2C_SPEED_100K);
USB_setup();
USBPU_ON();
uint32_t ctr = Tms, Tlastima = 0;
while(1){
if(Tms - ctr > 499){
ctr = Tms;
pin_toggle(GPIOB, 1 << 1 | 1 << 0); // toggle LED @ PB0
}
int l = USB_receivestr(inbuff, MAXSTRLEN);
if(l < 0) USB_sendstr("USBOVERFLOW\n");
else if(l){
const char *ans = parse_cmd(inbuff);
if(ans) USB_sendstr(ans);
}
if(i2c_scanmode){
uint8_t addr;
int ok = i2c_scan_next_addr(&addr);
if(addr == I2C_ADDREND) USND("SCANEND");
else if(ok){
U("FOUNDID=");
USND(uhex2str(addr));
}
}
mlx_process();
if(cartoon){
uint32_t Tnow = mlx_lastimT();
if(Tnow != Tlastima){
fp_t *i = mlx_getimage(&Tnow);
if(i){
U("Timage="); USND(u2str(Tnow)); drawIma(i);
Tlastima = Tnow;
}
}
}
}
}

BIN
F3:F303/MLX90640multi/mlx90640.bin
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361
F3:F303/MLX90640multi/mlx90640.c
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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include <stdint.h>
#include <string.h>
#include "strfunc.h"
#include "mlx90640.h"
#include "mlx90640_regs.h"
#include "mlxproc.h"
// static const char *OK = "OK\n", *OKs = "OK ", *NOTEQ = "NOT equal!\n", *NOTEQi = "NOT equal on index ";
// tolerance of floating point comparison
#define FP_TOLERANCE (1e-3)
static fp_t mlx_image[MLX_PIXNO] = {0}; // ready image
void dumpIma(const fp_t im[MLX_PIXNO]){
for(int row = 0; row < MLX_H; ++row){
for(int col = 0; col < MLX_W; ++col){
printfl(*im++, 1);
USB_putbyte(' ');
}
newline();
}
}
#define GRAY_LEVELS (16)
// 16-level character set ordered by fill percentage (provided by user)
static const char* CHARS_16 = " .':;+*oxX#&%B$@";
void drawIma(const fp_t im[MLX_PIXNO]){
// Find min and max values
fp_t min_val = im[0], max_val = im[0];
const fp_t *iptr = im;
for(int row = 0; row < MLX_H; ++row){
for(int col = 0; col < MLX_W; ++col){
fp_t cur = *iptr++;
if(cur < min_val) min_val = cur;
else if(cur > max_val) max_val = cur;
}
}
fp_t range = max_val - min_val;
U("RANGE="); USND(float2str(range, 3));
U("MIN="); USND(float2str(min_val, 3));
U("MAX="); USND(float2str(max_val, 3));
if(fabsf(range) < 0.001) range = 1.; // solid fill -> blank
// Generate and print ASCII art
iptr = im;
for(int row = 0; row < MLX_H; ++row){
for(int col = 0; col < MLX_W; ++col){
fp_t normalized = ((*iptr++) - min_val) / range;
// Map to character index (0 to 15)
int index = (int)(normalized * GRAY_LEVELS);
// Ensure we stay within bounds
if(index < 0) index = 0;
else if(index > (GRAY_LEVELS-1)) index = (GRAY_LEVELS-1);
USB_putbyte(CHARS_16[index]);
}
newline();
}
newline();
}
/*****************************************************************************
Calculate parameters & values
*****************************************************************************/
// fill OCC/ACC row/col arrays
static void occacc(int8_t *arr, int l, const uint16_t *regstart){
int n = l >> 2; // divide by 4
int8_t *p = arr;
for(int i = 0; i < n; ++i){
register uint16_t val = *regstart++;
*p++ = (val & 0x000F) >> 0;
*p++ = (val & 0x00F0) >> 4;
*p++ = (val & 0x0F00) >> 8;
*p++ = (val ) >> 12;
}
for(int i = 0; i < l; ++i, ++arr){
if(*arr > 0x07) *arr -= 0x10;
}
}
// get all parameters' values from `dataarray`, return FALSE if something failed
int get_parameters(const uint16_t dataarray[MLX_DMA_MAXLEN], MLX90640_params *params){
#define CREG_VAL(reg) dataarray[CREG_IDX(reg)]
int8_t i8;
int16_t i16;
uint16_t *pu16;
uint16_t val = CREG_VAL(REG_VDD);
i8 = (int8_t) (val >> 8);
params->kVdd = i8 * 32; // keep sign
if(params->kVdd == 0) return FALSE;
i16 = val & 0xFF;
params->vdd25 = ((i16 - 0x100) * 32) - (1<<13);
val = CREG_VAL(REG_KVTPTAT);
i16 = (val & 0xFC00) >> 10;
if(i16 > 0x1F) i16 -= 0x40;
params->KvPTAT = (fp_t)i16 / (1<<12);
i16 = (val & 0x03FF);
if(i16 > 0x1FF) i16 -= 0x400;
params->KtPTAT = (fp_t)i16 / 8.;
params->vPTAT25 = (int16_t) CREG_VAL(REG_PTAT);
val = CREG_VAL(REG_APTATOCCS) >> 12;
params->alphaPTAT = val / 4. + 8.;
params->gainEE = (int16_t)CREG_VAL(REG_GAIN);
if(params->gainEE == 0) return FALSE;
int8_t occRow[MLX_H];
int8_t occColumn[MLX_W];
occacc(occRow, MLX_H, &CREG_VAL(REG_OCCROW14));
occacc(occColumn, MLX_W, &CREG_VAL(REG_OCCCOL14));
int8_t accRow[MLX_H];
int8_t accColumn[MLX_W];
occacc(accRow, MLX_H, &CREG_VAL(REG_ACCROW14));
occacc(accColumn, MLX_W, &CREG_VAL(REG_ACCCOL14));
val = CREG_VAL(REG_APTATOCCS);
// need to do multiplication instead of bitshift, so:
fp_t occRemScale = 1<<(val&0x0F),
occColumnScale = 1<<((val>>4)&0x0F),
occRowScale = 1<<((val>>8)&0x0F);
int16_t offavg = (int16_t) CREG_VAL(REG_OSAVG);
// even/odd column/row numbers are for starting from 1, so for starting from 0 we should swap them:
// even - for 1,3,5,...; odd - for 0,2,4,... etc
int8_t ktaavg[4];
// 0 - odd row, odd col; 1 - odd row even col; 2 - even row, odd col; 3 - even row, even col
val = CREG_VAL(REG_KTAAVGODDCOL);
ktaavg[2] = (int8_t)(val & 0xFF); // odd col (1,3,..), even row (2,4,..) -> col 0,2,..; row 1,3,..
ktaavg[0] = (int8_t)(val >> 8); // odd col, odd row -> col 0,2,..; row 0,2,..
val = CREG_VAL(REG_KTAAVGEVENCOL);
ktaavg[3] = (int8_t)(val & 0xFF); // even col, even row -> col 1,3,..; row 1,3,..
ktaavg[1] = (int8_t)(val >> 8); // even col, odd row -> col 1,3,..; row 0,2,..
// so index of ktaavg is 2*(row&1)+(col&1)
val = CREG_VAL(REG_KTAVSCALE);
uint8_t scale1 = ((val & 0xFF)>>4) + 8, scale2 = (val&0xF);
if(scale1 == 0 || scale2 == 0) return FALSE;
fp_t mul = (fp_t)(1<<scale2), div = (fp_t)(1<<scale1); // kta_scales
uint16_t a_r = CREG_VAL(REG_SENSIVITY); // alpha_ref
val = CREG_VAL(REG_SCALEACC);
fp_t *a = params->alpha;
uint32_t diva32 = 1 << (val >> 12);
fp_t diva = (fp_t)(diva32);
diva *= (fp_t)(1<<30); // alpha_scale
fp_t accRowScale = 1<<((val & 0x0f00)>>8),
accColumnScale = 1<<((val & 0x00f0)>>4),
accRemScale = 1<<(val & 0x0f);
pu16 = (uint16_t*)&CREG_VAL(REG_OFFAK1);
fp_t *kta = params->kta, *offset = params->offset;
uint8_t *ol = params->outliers;
for(int row = 0; row < MLX_H; ++row){
int idx = (row&1)<<1;
for(int col = 0; col < MLX_W; ++col){
// offset
register uint16_t rv = *pu16++;
i16 = (rv & 0xFC00) >> 10;
if(i16 > 0x1F) i16 -= 0x40;
*offset++ = (fp_t)offavg + (fp_t)occRow[row]*occRowScale + (fp_t)occColumn[col]*occColumnScale + (fp_t)i16*occRemScale;
// kta
i16 = (rv & 0xF) >> 1;
if(i16 > 0x03) i16 -= 0x08;
*kta++ = (ktaavg[idx|(col&1)] + i16*mul) / div;
// alpha
i16 = (rv & 0x3F0) >> 4;
if(i16 > 0x1F) i16 -= 0x40;
fp_t oft = (fp_t)a_r + accRow[row]*accRowScale + accColumn[col]*accColumnScale +i16*accRemScale;
*a++ = oft / diva;
*ol++ = (rv&1) ? 1 : 0;
}
}
scale1 = (CREG_VAL(REG_KTAVSCALE) >> 8) & 0xF; // kvscale
div = (fp_t)(1<<scale1);
val = CREG_VAL(REG_KVAVG);
// kv indexes: +2 for odd (ÎÅÞÅÔÎÙÈ) rows, +1 for odd columns, so:
// [ 3, 2; 1, 0] for left upper corner (because datashit counts from 1, not from 0!)
i16 = val >> 12; if(i16 > 0x07) i16 -= 0x10;
ktaavg[0] = (int8_t)i16; // odd col, odd row
i16 = (val & 0xF0) >> 4; if(i16 > 0x07) i16 -= 0x10;
ktaavg[1] = (int8_t)i16; // even col, odd row
i16 = (val & 0x0F00) >> 8; if(i16 > 0x07) i16 -= 0x10;
ktaavg[2] = (int8_t)i16; // odd col, even row
i16 = val & 0x0F; if(i16 > 0x07) i16 -= 0x10;
ktaavg[3] = (int8_t)i16; // even col, even row
for(int i = 0; i < 4; ++i) params->kv[i] = ktaavg[i] / div;
val = CREG_VAL(REG_CPOFF);
params->cpOffset[0] = (val & 0x03ff);
if(params->cpOffset[0] > 0x1ff) params->cpOffset[0] -= 0x400;
params->cpOffset[1] = val >> 10;
if(params->cpOffset[1] > 0x1f) params->cpOffset[1] -= 0x40;
params->cpOffset[1] += params->cpOffset[0];
val = ((CREG_VAL(REG_KTAVSCALE) & 0xF0) >> 4) + 8;
i8 = (int8_t)(CREG_VAL(REG_KVTACP) & 0xFF);
params->cpKta = (fp_t)i8 / (1<<val);
val = (CREG_VAL(REG_KTAVSCALE) & 0x0F00) >> 8;
i16 = CREG_VAL(REG_KVTACP) >> 8;
if(i16 > 0x7F) i16 -= 0x100;
params->cpKv = (fp_t)i16 / (1<<val);
i16 = CREG_VAL(REG_KSTATGC) & 0xFF;
if(i16 > 0x7F) i16 -= 0x100;
params->tgc = (fp_t)i16;
params->tgc /= 32.;
val = (CREG_VAL(REG_SCALEACC)>>12); // alpha_scale_CP
i16 = CREG_VAL(REG_ALPHA)>>10; // cp_P1_P0_ratio
if(i16 > 0x1F) i16 -= 0x40;
div = (fp_t)(1<<val);
div *= (fp_t)(1<<27);
params->cpAlpha[0] = (fp_t)(CREG_VAL(REG_ALPHA) & 0x03FF) / div;
div = (fp_t)(1<<7);
params->cpAlpha[1] = params->cpAlpha[0] * (1. + (fp_t)i16/div);
i8 = (int8_t)(CREG_VAL(REG_KSTATGC) >> 8);
params->KsTa = (fp_t)i8/(1<<13);
div = 1<<((CREG_VAL(REG_CT34) & 0x0F) + 8); // kstoscale
val = CREG_VAL(REG_KSTO12);
i8 = (int8_t)(val & 0xFF);
params->KsTo[0] = i8 / div;
i8 = (int8_t)(val >> 8);
params->KsTo[1] = i8 / div;
val = CREG_VAL(REG_KSTO34);
i8 = (int8_t)(val & 0xFF);
params->KsTo[2] = i8 / div;
i8 = (int8_t)(val >> 8);
params->KsTo[3] = i8 / div;
// CT1 = -40, CT2 = 0 -> start from zero index, so CT[0] is CT2, CT[1] is CT3, CT[2] is CT4
params->CT[0] = 0.; // 0degr - between ranges 1 and 2
val = CREG_VAL(REG_CT34);
mul = ((val & 0x3000)>>12)*10.; // step
params->CT[1] = ((val & 0xF0)>>4)*mul; // CT3 - between ranges 2 and 3
params->CT[2] = ((val & 0x0F00) >> 8)*mul + params->CT[1]; // CT4 - between ranges 3 and 4
// alphacorr for each range: 11.1.11
params->alphacorr[0] = 1./(1. + params->KsTo[0] * 40.);
params->alphacorr[1] = 1.;
params->alphacorr[2] = (1. + params->KsTo[1] * params->CT[1]);
params->alphacorr[3] = (1. + params->KsTo[2] * (params->CT[2] - params->CT[1])) * params->alphacorr[2];
params->resolEE = (uint8_t)((CREG_VAL(REG_KTAVSCALE) & 0x3000) >> 12);
// Don't forget to check 'outlier' flags for wide purpose
return TRUE;
#undef CREG_VAL
}
/**
* @brief process_image - process both subpages (image data of sp0 lays in sp1, service data is in spare array)
* @param params
* @param subpages
* @param Service0
* @param subpageno
* @return
*/
fp_t *process_image(const MLX90640_params *params, const int16_t subpage1[REG_IMAGEDATA_LEN]){
#define IMD_VAL(reg) subpage1[IMD_IDX(reg)]
// 11.2.2.1. Resolution restore
fp_t resol_corr = (fp_t)(1<<params->resolEE) / (1<<mlx_getresolution()); // calibrated resol/current resol
int16_t i16a;
fp_t dvdd, dTa, Kgain, pixOS[2]; // values for both subpages
// 11.2.2.2. Supply voltage value calculation
i16a = (int16_t)IMD_VAL(REG_IVDDPIX);
//U("rval="); USND(i2str(i16a));
dvdd = resol_corr*i16a - params->vdd25;
dvdd /= params->kVdd;
//U("dvdd="); USND(float2str(dvdd, 2));
fp_t dV = i16a - params->vdd25; // for next step
dV /= params->kVdd;
// 11.2.2.3. Ambient temperature calculation
i16a = (int16_t)IMD_VAL(REG_ITAPTAT);
int16_t i16b = (int16_t)IMD_VAL(REG_ITAVBE);
dTa = (fp_t)i16a / (i16a * params->alphaPTAT + i16b); // vptatart
dTa *= (fp_t)(1<<18);
dTa = (dTa / (1. + params->KvPTAT*dV)) - params->vPTAT25;
dTa = dTa / params->KtPTAT; // without 25degr - Ta0
// 11.2.2.4. Gain parameter calculation
i16a = (int16_t)IMD_VAL(REG_IGAIN);
Kgain = params->gainEE / (fp_t)i16a;
// 11.2.2.6.1
pixOS[0] = ((int16_t)IMD_VAL(REG_ICPSP0))*Kgain; // pix_OS_CP_SPx
pixOS[1] = ((int16_t)IMD_VAL(REG_ICPSP1))*Kgain;
// 11.2.2.6.2
for(int sp = 0; sp < 2; ++sp)
pixOS[sp] -= params->cpOffset[sp]*(1. + params->cpKta*dTa)*(1. + params->cpKv*dvdd);
// now make first approximation to image
uint16_t pixno = 0; // current pixel number - for indexing in parameters etc
for(int row = 0, rowidx = 0; row < MLX_H; ++row, rowidx ^= 2){
for(int col = 0, idx = rowidx; col < MLX_W; ++col, ++pixno, idx ^= 1){
uint8_t sp = (row&1)^(col&1); // subpage of current pixel - for `pixOS` and `cpAlpha`
// 11.2.2.5.1
fp_t curval = (fp_t)(subpage1[pixno]) * Kgain; // gain compensation
// 11.2.2.5.3
curval -= params->offset[pixno] * (1. + params->kta[pixno]*dTa) *
(1. + params->kv[idx]*dvdd); // add offset
// now `curval` is pix_OS == V_IR_emiss_comp (we can divide it by `emissivity` to compensate for it)
// 11.2.2.7: 'Pattern' is just subpage number!
fp_t IRcompens = curval - params->tgc * pixOS[sp]; // 11.2.2.8. Normalizing to sensitivity
// 11.2.2.8
fp_t alphaComp = params->alpha[pixno] - params->tgc * params->cpAlpha[sp];
alphaComp *= 1. + params->KsTa * dTa;
// 11.2.2.9: calculate To for basic range
fp_t Tar = dTa + 273.15 + 25.; // Ta+273.15
Tar = Tar*Tar*Tar*Tar; // T_aK4 (when \epsilon==1 this is T_{a-r} too)
fp_t ac3 = alphaComp*alphaComp*alphaComp;
fp_t Sx = ac3*IRcompens + alphaComp*ac3*Tar;
Sx = params->KsTo[1] * SQRT(SQRT(Sx));
fp_t To4 = IRcompens / (alphaComp * (1. - 273.15*params->KsTo[1]) + Sx) + Tar;
curval = SQRT(SQRT(To4)) - 273.15;
// 11.2.2.9.1.3. Extended To range calculation
int r = 0; // range 1 by default
fp_t ctx = -40.;
if(curval > params->CT[2]){ // range 4
r = 3; ctx = params->CT[2];
}else if(curval > params->CT[1]){ // range 3
r = 2; ctx = params->CT[1];
}else if(curval > params->CT[0]){ // range 2, default
r = 1; ctx = params->CT[0];
}
if(r != 1){ // recalculate for extended range if we are out of standard range
To4 = IRcompens / (alphaComp * params->alphacorr[r] * (1. + params->KsTo[r]*(curval - ctx))) + Tar;
curval = SQRT(SQRT(To4)) - 273.15;
}
mlx_image[pixno] = curval;
}
}
return mlx_image;
#undef IMD_VAL
}
/*
int MLXtest(){
MLX90640_params p;
USB_sendstr(" Extract parameters - ");
if(!get_parameters(EEPROM, &p)) return 2;
USB_sendstr(OK);
dump_parameters(&p, &extracted_parameters);
fp_t *sp;
for(int i = 0; i < 2; ++i){
USB_sendstr(" 100 times process subpage - "); printi(i); USB_putbyte(' ');
uint32_t Tstart = Tms;
for(int _ = 0; _ < 100; ++_){
sp = process_subpage(&p, DataFrame[i], i, 2);
if(!sp) return 1;
}
USB_sendstr(OKs); printfl((Tms - Tstart)/100.f, 3); USB_sendstr(" ms\n");
dumpIma(sp);
chkImage(sp, ToFrame[i]);
}
drawIma(sp);
return 0;
}
*/

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-std=c17

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F3:F303/MLX90640multi/mlx90640.config
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// Add predefined macros for your project here. For example:
// #define THE_ANSWER 42
#define EBUG
#define STM32F3
#define STM32F303xb
#define __thumb2__ 1
#define __ARM_ARCH_7M__

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F3:F303/MLX90640multi/mlx90640.creator
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[General]

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F3:F303/MLX90640multi/mlx90640.creator.user
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE QtCreatorProject>
<!-- Written by QtCreator 17.0.1, 2025-09-22T23:16:50. -->
<qtcreator>
<data>
<variable>EnvironmentId</variable>
<value type="QByteArray">{7bd84e39-ca37-46d3-be9d-99ebea85bc0d}</value>
</data>
<data>
<variable>ProjectExplorer.Project.ActiveTarget</variable>
<value type="qlonglong">0</value>
</data>
<data>
<variable>ProjectExplorer.Project.EditorSettings</variable>
<valuemap type="QVariantMap">
<value type="bool" key="EditorConfiguration.AutoDetect">true</value>
<value type="bool" key="EditorConfiguration.AutoIndent">true</value>
<value type="bool" key="EditorConfiguration.CamelCaseNavigation">true</value>
<valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.0">
<value type="QString" key="language">Cpp</value>
<valuemap type="QVariantMap" key="value">
<value type="QByteArray" key="CurrentPreferences">CppGlobal</value>
</valuemap>
</valuemap>
<valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.1">
<value type="QString" key="language">QmlJS</value>
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1
F3:F303/MLX90640multi/mlx90640.cxxflags
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@ -1 +0,0 @@
-std=c++17

25
F3:F303/MLX90640multi/mlx90640.files
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@ -1,25 +0,0 @@
hardware.c
hardware.h
i2c.c
i2c.h
main.c
mlx90640.c
mlx90640.h
mlx90640_regs.h
mlxproc.c
mlxproc.h
proto.c
proto.h
ringbuffer.c
ringbuffer.h
strfunc.c
strfunc.h
usb.c
usb.h
usb_descr.c
usb_descr.h
usb_dev.c
usb_dev.h
usb_lib.c
usb_lib.h
usbhw.h

65
F3:F303/MLX90640multi/mlx90640.h
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@ -1,65 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "mlx90640_regs.h"
#include <stdint.h>
// floating type & sqrt operator
typedef float fp_t;
#define SQRT(x) sqrtf((x))
// amount of pixels
#define MLX_W (32)
#define MLX_H (24)
#define MLX_PIXNO (MLX_W*MLX_H)
// pixels + service data
#define MLX_PIXARRSZ (MLX_PIXNO + 64)
typedef struct{
int16_t kVdd;
int16_t vdd25;
fp_t KvPTAT;
fp_t KtPTAT;
int16_t vPTAT25;
fp_t alphaPTAT;
int16_t gainEE;
fp_t tgc;
fp_t cpKv; // K_V_CP
fp_t cpKta; // K_Ta_CP
fp_t KsTa;
fp_t CT[3]; // range borders (0, 160, 320 degrC?)
fp_t KsTo[4]; // K_S_To for each range * 273.15
fp_t alphacorr[4]; // Alpha_corr for each range
fp_t alpha[MLX_PIXNO]; // full - with alpha_scale
fp_t offset[MLX_PIXNO];
fp_t kta[MLX_PIXNO]; // full K_ta - with scale1&2
fp_t kv[4]; // full - with scale; 0 - odd row, odd col; 1 - odd row even col; 2 - even row, odd col; 3 - even row, even col
fp_t cpAlpha[2]; // alpha_CP_subpage 0 and 1
uint8_t resolEE; // resolution_EE
int16_t cpOffset[2];
uint8_t outliers[MLX_PIXNO]; // outliers - bad pixels (if == 1)
} MLX90640_params;
int ch_resolution(uint8_t newresol);
int get_parameters(const uint16_t dataarray[MLX_DMA_MAXLEN], MLX90640_params *params);
fp_t *process_image(const MLX90640_params *params, const int16_t subpage1[REG_IMAGEDATA_LEN]);
void dumpIma(const fp_t im[MLX_PIXNO]);
void drawIma(const fp_t im[MLX_PIXNO]);

6
F3:F303/MLX90640multi/mlx90640.includes
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@ -1,6 +0,0 @@
.
../inc
../inc/Fx
../inc/cm
../inc/ld
../inc/startup

104
F3:F303/MLX90640multi/mlx90640_regs.h
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@ -1,104 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#define REG_STATUS 0x8000
#define REG_STATUS_OVWEN (1<<4)
#define REG_STATUS_NEWDATA (1<<3)
#define REG_STATUS_SPNO (1<<0)
#define REG_STATUS_SPMASK (3<<0)
#define REG_CONTROL 0x800D
#define REG_CONTROL_CHESS (1<<12)
#define REG_CONTROL_RES16 (0<<10)
#define REG_CONTROL_RES17 (1<<10)
#define REG_CONTROL_RES18 (2<<10)
#define REG_CONTROL_RES19 (3<<10)
#define REG_CONTROL_RESMASK (3<<10)
#define REG_CONTROL_REFR_05HZ (0<<7)
#define REG_CONTROL_REFR_1HZ (1<<7)
#define REG_CONTROL_REFR_2HZ (2<<7)
#define REG_CONTROL_REFR_4HZ (3<<7)
#define REG_CONTROL_REFR_8HZ (4<<7)
#define REG_CONTROL_REFR_16HZ (5<<7)
#define REG_CONTROL_REFR_32HZ (6<<7)
#define REG_CONTROL_REFR_64HZ (7<<7)
#define REG_CONTROL_SUBP1 (1<<4)
#define REG_CONTROL_SUBPMASK (3<<4)
#define REG_CONTROL_SUBPSEL (1<<3)
#define REG_CONTROL_DATAHOLD (1<<2)
#define REG_CONTROL_SUBPEN (1<<0)
#define REG_MLXADDR_MASK (0xff)
// default value
#define REG_CONTROL_DEFAULT (REG_CONTROL_CHESS|REG_CONTROL_RES18|REG_CONTROL_REFR_2HZ|REG_CONTROL_SUBPEN)
// calibration data start & len
#define REG_CALIDATA 0x2400
#define REG_CALIDATA_LEN 832
// address in EEPROM (writing to 0x8010 will only change address in RAM)
#define REG_MLXADDR 0x240f
#define REG_APTATOCCS 0x2410
#define REG_OSAVG 0x2411
#define REG_OCCROW14 0x2412
#define REG_OCCCOL14 0x2418
#define REG_SCALEACC 0x2420
#define REG_SENSIVITY 0x2421
#define REG_ACCROW14 0x2422
#define REG_ACCCOL14 0x2428
#define REG_GAIN 0x2430
#define REG_PTAT 0x2431
#define REG_KVTPTAT 0x2432
#define REG_VDD 0x2433
#define REG_KVAVG 0x2434
#define REG_ILCHESS 0x2435
#define REG_KTAAVGODDCOL 0x2436
#define REG_KTAAVGEVENCOL 0x2437
#define REG_KTAVSCALE 0x2438
#define REG_ALPHA 0x2439
#define REG_CPOFF 0x243A
#define REG_KVTACP 0x243B
#define REG_KSTATGC 0x243C
#define REG_KSTO12 0x243D
#define REG_KSTO34 0x243E
#define REG_CT34 0x243F
#define REG_OFFAK1 0x2440
// index of register in array (from REG_CALIDATA)
#define CREG_IDX(addr) ((addr)-REG_CALIDATA)
// full amount of IMAGE (or calibration) data + EXTRA data (counts of uint16_t!)
#define MLX_DMA_MAXLEN 834
// RAM register of image data
#define REG_IMAGEDATA 0x0400
#define REG_IMAGEDATA_LEN 832
// RAM register of service data
#define REG_SERVICE 0x0700
#define REG_SERVICE_LEN 64
#define REG_ITAVBE 0x0700
#define REG_ICPSP0 0x0708
#define REG_IGAIN 0x070A
#define REG_ITAPTAT 0x0720
#define REG_ICPSP1 0x0728
#define REG_IVDDPIX 0x072A
// index of register in array (from REG_IMAGEDATA)
#define IMD_IDX(addr) ((addr)-REG_IMAGEDATA)
// and for subpage 0 - only service data
#define SERVICE_IDX(addr) ((addr)-REG_SERVICE)

191
F3:F303/MLX90640multi/mlxproc.c
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@ -1,191 +0,0 @@
/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "i2c.h"
#include "mlxproc.h"
#include "mlx90640_regs.h"
//#include "usb_dev.h"
//#include "strfunc.h"
extern volatile uint32_t Tms;
// current state and state before `stop` called
static mlx_state_t MLX_state = MLX_NOTINIT, MLX_oldstate = MLX_NOTINIT;
static MLX90640_params p;
static int parsrdy = 0;
static uint8_t MLX_address = 0x33 << 1;
static int errctr = 0; // errors counter - cleared by mlx_continue
static uint32_t Tlastimage = 0;
static uint8_t resolution = 2; // default: 18bit
static int16_t subpage1[REG_IMAGEDATA_LEN];
// get current state
mlx_state_t mlx_state(){ return MLX_state; }
// set address
int mlx_setaddr(uint8_t addr){
if(addr > 0x7f) return 0;
MLX_address = addr << 1;
Tlastimage = Tms; // refresh counter for autoreset I2C in case of error
return 1;
}
// temporary stop
void mlx_stop(){
MLX_oldstate = MLX_state;
MLX_state = MLX_RELAX;
}
// continue processing
void mlx_continue(){
errctr = 0;
switch(MLX_oldstate){
case MLX_WAITSUBPAGE:
case MLX_READSUBPAGE:
MLX_state = MLX_WAITSUBPAGE;
break;
//case MLX_NOTINIT:
//case MLX_WAITPARAMS:
default:
MLX_state = MLX_NOTINIT;
break;
}
}
void mlx_process(){
// static uint32_t Tlast = 0;
static int subpage = 0;
switch(MLX_state){
case MLX_NOTINIT: // start reading parameters
if(i2c_read_reg16(MLX_address, REG_CALIDATA, MLX_DMA_MAXLEN, 1)){
errctr = 0;
MLX_state = MLX_WAITPARAMS;
}else ++errctr;
break;
case MLX_WAITPARAMS: // check DMA ends and calculate parameters
if(i2c_dma_haderr()) MLX_state = MLX_NOTINIT;
else{
uint16_t len, *buf = i2c_dma_getbuf(&len);
if(buf){
if(len != MLX_DMA_MAXLEN) MLX_state = MLX_NOTINIT;
else if(get_parameters(buf, &p)){
errctr = 0;
MLX_state = MLX_WAITSUBPAGE; // fine! we could wait subpage
parsrdy = 1;
}
}
}
break;
case MLX_WAITSUBPAGE: // wait for subpage 1 ready
{uint16_t *got = i2c_read_reg16(MLX_address, REG_STATUS, 1, 0);
if(got && *got & REG_STATUS_NEWDATA){
if(subpage == (*got & REG_STATUS_SPNO)){
if(subpage == 0){ subpage = 1; break; }
if(i2c_read_reg16(MLX_address, REG_IMAGEDATA, REG_IMAGEDATA_LEN, 1)){
errctr = 0;
MLX_state = MLX_READSUBPAGE;
// U("spstart"); USB_putbyte('0'+subpage); USB_putbyte('='); USND(u2str(Tms - Tlast));
}else ++errctr;
}
}}
break;
case MLX_READSUBPAGE: // wait ends of DMA read and calculate subpage
if(i2c_dma_haderr()) MLX_state = MLX_NOTINIT;
else{
uint16_t len, *buf = i2c_dma_getbuf(&len);
if(buf){
// U("spread="); USND(u2str(Tms - Tlast));
if(len != REG_IMAGEDATA_LEN){
MLX_state = MLX_WAITSUBPAGE;
}else{
errctr = 0;
memcpy(subpage1, buf, REG_IMAGEDATA_LEN * sizeof(int16_t));
MLX_state = MLX_WAITSUBPAGE; // fine! we could wait next subpage
// U("spgot="); USND(u2str(Tms - Tlast));
Tlastimage = Tms;
// U("imgot="); USND(u2str(Tms - Tlast)); Tlast = Tms;
}
subpage = 0;
}
}
break;
default:
return;
}
if(MLX_state != MLX_RELAX && Tms - Tlastimage > MLX_I2CERR_TMOUT){ i2c_setup(i2c_curspeed); Tlastimage = Tms; }
if(errctr > MLX_MAX_ERRORS) mlx_stop();
}
// get parameters - memcpy to user's
int mlx_getparams(MLX90640_params *pars){
if(!pars || !parsrdy) return 0;
memcpy(pars, &p, sizeof(p));
return 1;
}
uint32_t mlx_lastimT(){ return Tlastimage; }
fp_t *mlx_getimage(uint32_t *Tgot){
fp_t *ready_image = process_image(&p, subpage1);
if(!ready_image) return NULL;
if(Tgot) *Tgot = Tlastimage;
return ready_image;
}
uint8_t mlx_getresolution(){
return resolution;
}
int mlx_sethwaddr(uint8_t addr){
if(addr > 0x7f) return 0;
uint16_t data[2], *ptr;
if(!(ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0))) return 0;
//U("Old address: "); USND(uhex2str(*ptr));
data[0] = REG_MLXADDR; data[1] = 0;
uint16_t oldreg = *ptr;
if(!i2c_write(MLX_address, data, 2)) return 0; // clear address
uint32_t Told = Tms;
while(Tms - Told < 10);
ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0);
// should be zero
if(!ptr){
data[0] = REG_MLXADDR; data[1] = oldreg;
i2c_write(MLX_address, data, 2); // leave old address
return 0;
}
data[0] = REG_MLXADDR; // i2c_write swaps bytes, so we need init data again
data[1] = (oldreg & ~REG_MLXADDR_MASK) | addr;
//U("Write address: "); U(uhex2str(data[0])); U(", "); USND(uhex2str(data[1]));
if(!i2c_write(MLX_address, data, 2)) return 0;
while(Tms - Told < 10);
if(!(ptr = i2c_read_reg16(MLX_address, REG_MLXADDR, 1, 0))) return 0;
//U("Got address: "); USND(uhex2str(*ptr));
if((*ptr & REG_MLXADDR_MASK) != addr) return 0;
return 1;
}
int mlx_setresolution(uint8_t newresol){
if(newresol > 3) return 0;
uint16_t data[2], *ptr;
if(!(ptr = i2c_read_reg16(MLX_address, REG_CONTROL, 1, 0))) return 0;
data[0] = REG_CONTROL;
data[1] = (*ptr & ~REG_CONTROL_RESMASK) | (newresol << 10);
if(!i2c_write(MLX_address, data, 2)) return 0;
resolution = newresol;
return 1;
}

48
F3:F303/MLX90640multi/mlxproc.h
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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include "mlx90640.h"
// maximal errors number to stop processing
#define MLX_MAX_ERRORS (11)
// if there's no new data by this time - reset bus
#define MLX_I2CERR_TMOUT (5000)
typedef enum{
MLX_NOTINIT, // just start - need to get parameters
MLX_WAITPARAMS, // wait for parameters DMA reading
MLX_WAITSUBPAGE, // wait for subpage changing
MLX_READSUBPAGE, // wait ending of subpage DMA reading
MLX_RELAX // do nothing - pause
} mlx_state_t;
int mlx_setaddr(uint8_t addr);
mlx_state_t mlx_state();
void mlx_stop();
void mlx_continue();
void mlx_process();
int mlx_getparams(MLX90640_params *pars);
fp_t *mlx_getimage(uint32_t *Tgot);
int mlx_setresolution(uint8_t newresol);
uint8_t mlx_getresolution();
int mlx_sethwaddr(uint8_t addr);
uint32_t mlx_lastimT();

119
F3:F303/MLX90640multi/openocd.cfg
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# SPDX-License-Identifier: GPL-2.0-or-later
# script for stm32f3x family
#
# stm32 devices support both JTAG and SWD transports.
#
source [find interface/stlink-v2-1.cfg]
source [find target/swj-dp.tcl]
source [find mem_helper.tcl]
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME stm32f3x
}
set _ENDIAN little
# Work-area is a space in RAM used for flash programming
# By default use 16kB
if { [info exists WORKAREASIZE] } {
set _WORKAREASIZE $WORKAREASIZE
} else {
set _WORKAREASIZE 0x4000
}
# JTAG speed should be <= F_CPU/6. F_CPU after reset is 8MHz, so use F_JTAG = 1MHz
#
# Since we may be running of an RC oscilator, we crank down the speed a
# bit more to be on the safe side. Perhaps superstition, but if are
# running off a crystal, we can run closer to the limit. Note
# that there can be a pretty wide band where things are more or less stable.
adapter speed 1000
adapter srst delay 100
if {[using_jtag]} {
jtag_ntrst_delay 100
}
#jtag scan chain
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
if { [using_jtag] } {
# See STM Document RM0316
# Section 29.6.3 - corresponds to Cortex-M4 r0p1
set _CPUTAPID 0x4ba00477
} {
set _CPUTAPID 0x2ba01477
}
}
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
if {[using_jtag]} {
jtag newtap $_CHIPNAME bs -irlen 5
}
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME stm32f1x 0 0 0 0 $_TARGETNAME
reset_config srst_nogate
if {![using_hla]} {
# if srst is not fitted use SYSRESETREQ to
# perform a soft reset
cortex_m reset_config sysresetreq
}
proc stm32f3x_default_reset_start {} {
# Reset clock is HSI (8 MHz)
adapter speed 1000
}
proc stm32f3x_default_examine_end {} {
# Enable debug during low power modes (uses more power)
mmw 0xe0042004 0x00000007 0 ;# DBGMCU_CR |= DBG_STANDBY | DBG_STOP | DBG_SLEEP
# Stop watchdog counters during halt
mmw 0xe0042008 0x00001800 0 ;# DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
}
proc stm32f3x_default_reset_init {} {
# Configure PLL to boost clock to HSI x 8 (64 MHz)
mww 0x40021004 0x00380400 ;# RCC_CFGR = PLLMUL[3:1] | PPRE1[2]
mmw 0x40021000 0x01000000 0 ;# RCC_CR |= PLLON
mww 0x40022000 0x00000012 ;# FLASH_ACR = PRFTBE | LATENCY[1]
sleep 10 ;# Wait for PLL to lock
mmw 0x40021004 0x00000002 0 ;# RCC_CFGR |= SW[1]
# Boost JTAG frequency
adapter speed 8000
}
# Default hooks
$_TARGETNAME configure -event examine-end { stm32f3x_default_examine_end }
$_TARGETNAME configure -event reset-start { stm32f3x_default_reset_start }
$_TARGETNAME configure -event reset-init { stm32f3x_default_reset_init }
tpiu create $_CHIPNAME.tpiu -dap $_CHIPNAME.dap -ap-num 0 -baseaddr 0xE0040000
lappend _telnet_autocomplete_skip _proc_pre_enable_$_CHIPNAME.tpiu
proc _proc_pre_enable_$_CHIPNAME.tpiu {_targetname} {
targets $_targetname
# Set TRACE_IOEN; TRACE_MODE is set to async; when using sync
# change this value accordingly to configure trace pins
# assignment
mmw 0xe0042004 0x00000020 0
}
$_CHIPNAME.tpiu configure -event pre-enable "_proc_pre_enable_$_CHIPNAME.tpiu $_TARGETNAME"

296
F3:F303/MLX90640multi/proto.c
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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stm32f3.h>
#include <string.h>
#include "i2c.h"
#include "mlxproc.h"
#include "strfunc.h"
#include "usb_dev.h"
#include "version.inc"
#define LOCBUFFSZ (32)
// local buffer for I2C data to send
static uint16_t locBuffer[LOCBUFFSZ];
static uint8_t I2Caddress = 0x33 << 1;
extern volatile uint32_t Tms;
uint8_t cartoon = 0; // "cartoon" mode: refresh image each time we get new
static const char *OK = "OK\n", *ERR = "ERR\n";
const char *helpstring =
"https://github.com/eddyem/stm32samples/tree/master/F3:F303/mlx90640 build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
" management of single IR bolometer MLX90640\n"
"aa - change I2C address to a (a should be non-shifted value!!!)\n"
"c - continue MLX\n"
"d - draw image in ASCII\n"
"i0..4 - setup I2C with speed 10k, 100k, 400k, 1M or 2M (experimental!)\n"
"p - pause MLX\n"
"r0..3 - change resolution (0 - 16bit, 3 - 19-bit)\n"
"t - show temperature map\n"
"C - \"cartoon\" mode on/off (show each new image)\n"
"D - dump MLX parameters\n"
"G - get MLX state\n"
"Ia addr - set device address\n"
"Ir reg n - read n words from 16-bit register\n"
"Iw words - send words (hex/dec/oct/bin) to I2C\n"
"Is - scan I2C bus\n"
"T - print current Tms\n"
;
TRUE_INLINE const char *setupI2C(char *buf){
static const char *speeds[I2C_SPEED_AMOUNT] = {
[I2C_SPEED_10K] = "10K",
[I2C_SPEED_100K] = "100K",
[I2C_SPEED_400K] = "400K",
[I2C_SPEED_1M] = "1M",
[I2C_SPEED_2M] = "2M"
};
if(buf && *buf){
buf = omit_spaces(buf);
int speed = *buf - '0';
if(speed < 0 || speed >= I2C_SPEED_AMOUNT){
return ERR;
}
i2c_setup((i2c_speed_t)speed);
}
U("I2CSPEED="); USND(speeds[i2c_curspeed]);
return NULL;
}
TRUE_INLINE const char *chhwaddr(const char *buf){
uint32_t a;
if(buf && *buf){
const char *nxt = getnum(buf, &a);
if(nxt && nxt != buf){
if(!mlx_sethwaddr(a)) return ERR;
}else{
USND("Wrong number");
return ERR;
}
}else{
USND("Need address");
return ERR;
}
return OK;
}
TRUE_INLINE const char *chres(const char *buf){
uint32_t r;
if(buf && *buf){
const char *nxt = getnum(buf, &r);
if(nxt && nxt != buf) if(!mlx_setresolution(r)) return ERR;
}
r = mlx_getresolution();
U("MLXRESOLUTION="); USND(u2str(r));
return NULL;
}
TRUE_INLINE const char *chaddr(const char *buf){
uint32_t addr;
const char *nxt = getnum(buf, &addr);
if(nxt && nxt != buf){
if(addr > 0x7f) return ERR;
mlx_setaddr(addr);
I2Caddress = (uint8_t) addr << 1;
}else addr = I2Caddress >> 1;
U("I2CADDR="); USND(uhex2str(addr));
return NULL;
}
// read I2C register[s] - only blocking read! (DMA allowable just for config/image reading in main process)
static const char *rdI2C(const char *buf){
uint32_t N = 0;
const char *nxt = getnum(buf, &N);
if(!nxt || buf == nxt || N > 0xffff) return ERR;
buf = nxt;
uint16_t reg = N, *b16 = NULL;
nxt = getnum(buf, &N);
if(!nxt || buf == nxt || N == 0 || N > I2C_BUFSIZE) return ERR;
if(!(b16 = i2c_read_reg16(I2Caddress, reg, N, 0))) return ERR;
if(N == 1){
char b[5];
u16s(*b16, b);
b[4] = 0;
USND(b);
}else hexdump16(USB_sendstr, b16, N);
return NULL;
}
// read N numbers from buf, @return 0 if wrong or none
TRUE_INLINE uint16_t readNnumbers(const char *buf){
uint32_t D;
const char *nxt;
uint16_t N = 0;
while((nxt = getnum(buf, &D)) && nxt != buf && N < LOCBUFFSZ){
buf = nxt;
locBuffer[N++] = (uint16_t) D;
}
return N;
}
static const char *wrI2C(const char *buf){
uint16_t N = readNnumbers(buf);
if(N == 0) return ERR;
for(int i = 0; i < N; ++i){
U("byte "); U(u2str(i)); U(" :"); USND(uhex2str(locBuffer[i]));
}
if(!i2c_write(I2Caddress, locBuffer, N)) return ERR;
return OK;
}
static void dumpfarr(float *arr){
for(int row = 0; row < 24; ++row){
for(int col = 0; col < 32; ++col){
printfl(*arr++, 2); USB_putbyte(' ');
}
newline();
}
}
// dump MLX parameters
TRUE_INLINE void dumpparams(){
MLX90640_params params;
if(!mlx_getparams(&params)){ U(ERR); return; }
U("\nkVdd="); printi(params.kVdd);
U("\nvdd25="); printi(params.vdd25);
U("\nKvPTAT="); printfl(params.KvPTAT, 4);
U("\nKtPTAT="); printfl(params.KtPTAT, 4);
U("\nvPTAT25="); printi(params.vPTAT25);
U("\nalphaPTAT="); printfl(params.alphaPTAT, 2);
U("\ngainEE="); printi(params.gainEE);
U("\nPixel offset parameters:\n");
float *offset = params.offset;
for(int row = 0; row < 24; ++row){
for(int col = 0; col < 32; ++col){
printfl(*offset++, 2); USB_putbyte(' ');
}
newline();
}
U("K_talpha:\n");
dumpfarr(params.kta);
U("Kv: ");
for(int i = 0; i < 4; ++i){
printfl(params.kv[i], 2); USB_putbyte(' ');
}
U("\ncpOffset=");
printi(params.cpOffset[0]); U(", "); printi(params.cpOffset[1]);
U("\ncpKta="); printfl(params.cpKta, 2);
U("\ncpKv="); printfl(params.cpKv, 2);
U("\ntgc="); printfl(params.tgc, 2);
U("\ncpALpha="); printfl(params.cpAlpha[0], 2);
U(", "); printfl(params.cpAlpha[1], 2);
U("\nKsTa="); printfl(params.KsTa, 2);
U("\nAlpha:\n");
dumpfarr(params.alpha);
U("\nCT3="); printfl(params.CT[1], 2);
U("\nCT4="); printfl(params.CT[2], 2);
for(int i = 0; i < 4; ++i){
U("\nKsTo"); USB_putbyte('0'+i); USB_putbyte('=');
printfl(params.KsTo[i], 2);
U("\nalphacorr"); USB_putbyte('0'+i); USB_putbyte('=');
printfl(params.alphacorr[i], 2);
}
newline();
}
// get MLX state
TRUE_INLINE void getst(){
static const char *states[] = {
[MLX_NOTINIT] = "not init",
[MLX_WAITPARAMS] = "wait parameters DMA read",
[MLX_WAITSUBPAGE] = "wait subpage",
[MLX_READSUBPAGE] = "wait subpage DMA read",
[MLX_RELAX] = "do nothing"
};
mlx_state_t s = mlx_state();
U("MLXSTATE=");
USND(states[s]);
}
const char *parse_cmd(char *buf){
if(!buf || !*buf) return NULL;
uint32_t u32;
if(buf[1]){
switch(*buf){ // "long" commands
case 'a':
return chhwaddr(buf + 1);
case 'i':
return setupI2C(buf + 1);
case 'r':
return chres(buf + 1);
case 'I':
buf = omit_spaces(buf + 1);
switch(*buf){
case 'a':
return chaddr(buf + 1);
case 'r':
return rdI2C(buf + 1);
case 'w':
return wrI2C(buf + 1);
case 's':
i2c_init_scan_mode();
return OK;
default:
return ERR;
}
break;
default:
return ERR;
}
}
switch(*buf){ // "short" (one letter) commands
case 'c':
mlx_continue(); return OK;
break;
case 'd':
{fp_t *i = mlx_getimage(&u32);
if(i){ U("Timage="); USND(u2str(u32)); drawIma(i); }
else U(ERR);}
break;
case 'i': return setupI2C(NULL); // current settings
case 'p':
mlx_stop(); return OK;
break;
case 'r': return chres(NULL);
case 't':
{fp_t *i = mlx_getimage(&u32);
if(i){ U("Timage="); USND(u2str(u32)); dumpIma(i); }
else U(ERR);}
break;
case 'C':
cartoon = !cartoon; return OK;
case 'D':
dumpparams();
break;
case 'G':
getst();
break;
case 'T':
U("T=");
USND(u2str(Tms));
break;
case '?': // help
case 'h':
case 'H':
U(helpstring);
break;
default:
return ERR;
break;
}
return NULL;
}

22
F3:F303/MLX90640multi/proto.h
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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
extern uint8_t cartoon;
char *parse_cmd(char *buf);

163
F3:F303/MLX90640multi/ringbuffer.c
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/*
* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "ringbuffer.h"
static int datalen(ringbuffer *b){
if(b->tail >= b->head) return (b->tail - b->head);
else return (b->length - b->head + b->tail);
}
// stored data length
int RB_datalen(ringbuffer *b){
if(b->busy) return -1;
b->busy = 1;
int l = datalen(b);
b->busy = 0;
return l;
}
static int hasbyte(ringbuffer *b, uint8_t byte){
if(b->head == b->tail) return -1; // no data in buffer
int startidx = b->head;
if(b->head > b->tail){ //
for(int found = b->head; found < b->length; ++found)
if(b->data[found] == byte) return found;
startidx = 0;
}
for(int found = startidx; found < b->tail; ++found)
if(b->data[found] == byte) return found;
return -1;
}
/**
* @brief RB_hasbyte - check if buffer has given byte stored
* @param b - buffer
* @param byte - byte to find
* @return index if found, -1 if none or busy
*/
int RB_hasbyte(ringbuffer *b, uint8_t byte){
if(b->busy) return -1;
b->busy = 1;
int ret = hasbyte(b, byte);
b->busy = 0;
return ret;
}
// increment head or tail
TRUE_INLINE void incr(ringbuffer *b, volatile int *what, int n){
*what += n;
if(*what >= b->length) *what -= b->length;
}
static int read(ringbuffer *b, uint8_t *s, int len){
int l = datalen(b);
if(!l) return 0;
if(l > len) l = len;
int _1st = b->length - b->head;
if(_1st > l) _1st = l;
if(_1st > len) _1st = len;
memcpy(s, b->data + b->head, _1st);
if(_1st < len && l > _1st){
memcpy(s+_1st, b->data, l - _1st);
incr(b, &b->head, l);
return l;
}
incr(b, &b->head, _1st);
return _1st;
}
/**
* @brief RB_read - read data from ringbuffer
* @param b - buffer
* @param s - array to write data
* @param len - max len of `s`
* @return bytes read or -1 if busy
*/
int RB_read(ringbuffer *b, uint8_t *s, int len){
if(b->busy) return -1;
b->busy = 1;
int r = read(b, s, len);
b->busy = 0;
return r;
}
static int readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len){
int idx = hasbyte(b, byte);
if(idx < 0) return 0;
int partlen = idx + 1 - b->head;
// now calculate length of new data portion
if(idx < b->head) partlen += b->length;
if(partlen > len) return -read(b, s, len);
return read(b, s, partlen);
}
/**
* @brief RB_readto fill array `s` with data until byte `byte` (with it)
* @param b - ringbuffer
* @param byte - check byte
* @param s - buffer to write data
* @param len - length of `s`
* @return amount of bytes written (negative, if len<data in buffer or buffer is busy)
*/
int RB_readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len){
if(b->busy) return -1;
b->busy = 1;
int n = readto(b, byte, s, len);
b->busy = 0;
return n;
}
static int write(ringbuffer *b, const uint8_t *str, int l){
int r = b->length - 1 - datalen(b); // rest length
if(l > r || !l) return 0;
int _1st = b->length - b->tail;
if(_1st > l) _1st = l;
memcpy(b->data + b->tail, str, _1st);
if(_1st < l){ // add another piece from start
memcpy(b->data, str+_1st, l-_1st);
}
incr(b, &b->tail, l);
return l;
}
/**
* @brief RB_write - write some data to ringbuffer
* @param b - buffer
* @param str - data
* @param l - length
* @return amount of bytes written or -1 if busy
*/
int RB_write(ringbuffer *b, const uint8_t *str, int l){
if(b->busy) return -1;
b->busy = 1;
int w = write(b, str, l);
b->busy = 0;
return w;
}
// just delete all information in buffer `b`
int RB_clearbuf(ringbuffer *b){
if(b->busy) return -1;
b->busy = 1;
b->head = 0;
b->tail = 0;
b->busy = 0;
return 1;
}

41
F3:F303/MLX90640multi/ringbuffer.h
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/*
* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#if defined STM32F0
#include <stm32f0.h>
#elif defined STM32F1
#include <stm32f1.h>
#elif defined STM32F3
#include <stm32f3.h>
#endif
typedef struct{
uint8_t *data; // data buffer
const int length; // its length
int head; // head index
int tail; // tail index
volatile int busy; // == TRUE if buffer is busy now
} ringbuffer;
int RB_read(ringbuffer *b, uint8_t *s, int len);
int RB_readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len);
int RB_hasbyte(ringbuffer *b, uint8_t byte);
int RB_write(ringbuffer *b, const uint8_t *str, int l);
int RB_datalen(ringbuffer *b);
int RB_clearbuf(ringbuffer *b);

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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h> // isnan / isinf
#include "strfunc.h"
// hex line number for hexdumps
void u16s(uint16_t n, char *buf){
for(int j = 3; j > -1; --j){
register uint8_t q = n & 0xf;
n >>= 4;
if(q < 10) buf[j] = q + '0';
else buf[j] = q - 10 + 'a';
}
}
/**
* @brief hexdump - dump hex array by 16 bytes in string
* @param sendfun - function to send data
* @param arr - array to dump
* @param len - length of `arr`
*/
void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len){
char buf[64] = "0000 ", *bptr = &buf[6];
for(uint16_t l = 0; l < len; ++l, ++arr){
for(int16_t j = 1; j > -1; --j){
register uint8_t half = (*arr >> (4*j)) & 0x0f;
if(half < 10) *bptr++ = half + '0';
else *bptr++ = half - 10 + 'a';
}
if((l & 0xf) == 0xf){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
u16s(l + 1, buf);
bptr = &buf[6];
}else *bptr++ = ' ';
}
if(bptr != &buf[6]){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
}
}
// dump uint16_t by 8 values in string
void hexdump16(int (*sendfun)(const char *s), uint16_t *arr, uint16_t len){
char buf[64] = "0000 ", *bptr = &buf[6];
for(uint16_t l = 0; l < len; ++l, ++arr){
//uint16_t val = *arr;
u16s(*arr, bptr);
/*for(int16_t j = 3; j > -1; --j){
register uint8_t q = val & 0xf;
val >>= 4;
if(q < 10) bptr[j] = q + '0';
else bptr[j] = q - 10 + 'a';
}*/
bptr += 4;
if((l & 7) == 7){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
u16s((l + 1)*2, buf); // number of byte, not word!
bptr = &buf[6];
}else *bptr++ = ' ';
}
if(bptr != &buf[6]){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
}
}
/**
* @brief _2str - convert value into string buffer
* @param val - |value|
* @param minus - ==0 if value > 0
* @return buffer with number
*/
static const char *_2str(uint32_t val, uint8_t minus){
static char strbuf[12];
char *bufptr = &strbuf[11];
*bufptr = 0;
if(!val){
*(--bufptr) = '0';
}else{
while(val){
uint32_t x = val / 10;
*(--bufptr) = (val - 10*x) + '0';
val = x;
//*(--bufptr) = val % 10 + '0';
//val /= 10;
}
}
if(minus) *(--bufptr) = '-';
return bufptr;
}
// return string with number `val`
const char *u2str(uint32_t val){
return _2str(val, 0);
}
const char *i2str(int32_t i){
uint8_t minus = 0;
uint32_t val;
if(i < 0){
minus = 1;
val = -i;
}else val = i;
return _2str(val, minus);
}
/**
* @brief uhex2str - print 32bit unsigned int as hex
* @param val - value
* @return string with number
*/
const char *uhex2str(uint32_t val){
static char buf[12] = "0x";
int npos = 2;
uint8_t *ptr = (uint8_t*)&val + 3;
int8_t i, j, z=1;
for(i = 0; i < 4; ++i, --ptr){
if(*ptr == 0){ // omit leading zeros
if(i == 3) z = 0;
if(z) continue;
}
else z = 0;
for(j = 1; j > -1; --j){
uint8_t half = (*ptr >> (4*j)) & 0x0f;
if(half < 10) buf[npos++] = half + '0';
else buf[npos++] = half - 10 + 'a';
}
}
buf[npos] = 0;
return buf;
}
/**
* @brief omit_spaces - eliminate leading spaces and other trash in string
* @param buf - string
* @return - pointer to first character in `buf` > ' '
*/
char *omit_spaces(const char *buf){
while(*buf){
if(*buf > ' ') break;
++buf;
}
return (char*)buf;
}
/**
* @brief getdec - read decimal number & return pointer to next non-number symbol
* @param buf - string
* @param N - number read
* @return Next non-number symbol. In case of overflow return `buf` and N==0xffffffff
*/
static const char *getdec(const char *buf, uint32_t *N){
char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '9'){
break;
}
if(num > 429496729 || (num == 429496729 && c > '5')){ // overflow
*N = 0xffffff;
return start;
}
num *= 10;
num += c - '0';
++buf;
}
*N = num;
return buf;
}
// read hexadecimal number (without 0x prefix!)
static const char *gethex(const char *buf, uint32_t *N){
const char *start = buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
uint8_t M = 0;
if(c >= '0' && c <= '9'){
M = '0';
}else if(c >= 'A' && c <= 'F'){
M = 'A' - 10;
}else if(c >= 'a' && c <= 'f'){
M = 'a' - 10;
}
if(M){
if(num & 0xf0000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 4;
num += c - M;
}else{
break;
}
++buf;
}
*N = num;
return buf;
}
// read octal number (without 0 prefix!)
static const char *getoct(const char *buf, uint32_t *N){
const char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '7'){
break;
}
if(num & 0xe0000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 3;
num += c - '0';
++buf;
}
*N = num;
return buf;
}
// read binary number (without b prefix!)
static const char *getbin(const char *buf, uint32_t *N){
const char *start = (char*)buf;
uint32_t num = 0;
while(*buf){
char c = *buf;
if(c < '0' || c > '1'){
break;
}
if(num & 0x80000000){ // overflow
*N = 0xffffff;
return start;
}
num <<= 1;
if(c == '1') num |= 1;
++buf;
}
*N = num;
return buf;
}
/**
* @brief getnum - read uint32_t from string (dec, hex or bin: 127, 0x7f, 0b1111111)
* @param buf - buffer with number and so on
* @param N - the number read
* @return pointer to first non-number symbol in buf
* (if it is == buf, there's no number or if *N==0xffffffff there was overflow)
*/
const char *getnum(const char *txt, uint32_t *N){
const char *nxt = NULL;
const char *s = omit_spaces(txt);
if(*s == '0'){ // hex, oct or 0
if(s[1] == 'x' || s[1] == 'X'){ // hex
nxt = gethex(s+2, N);
if(nxt == s+2) nxt = (char*)txt;
}else if(s[1] > '0'-1 && s[1] < '8'){ // oct
nxt = getoct(s+1, N);
if(nxt == s+1) nxt = (char*)txt;
}else{ // 0
nxt = s+1;
*N = 0;
}
}else if(*s == 'b' || *s == 'B'){
nxt = getbin(s+1, N);
if(nxt == s+1) nxt = (char*)txt;
}else{
nxt = getdec(s, N);
if(nxt == s) nxt = (char*)txt;
}
return nxt;
}
// get signed integer
const char *getint(const char *txt, int32_t *I){
const char *s = omit_spaces(txt);
int32_t sign = 1;
uint32_t U;
if(*s == '-'){
sign = -1;
++s;
}
const char *nxt = getnum(s, &U);
if(nxt == s) return txt;
if(U & 0x80000000) return txt; // overfull
*I = sign * (int32_t)U;
return nxt;
}
// be careful: if pow10 would be bigger you should change str[] size!
static const float pwr10[] = {1.f, 10.f, 100.f, 1000.f, 10000.f};
static const float rounds[] = {0.5f, 0.05f, 0.005f, 0.0005f, 0.00005f};
#define P10L (sizeof(pwr10)/sizeof(uint32_t) - 1)
char *float2str(float x, uint8_t prec){
static char str[16] = {0}; // -117.5494E-36\0 - 14 symbols max!
if(prec > P10L) prec = P10L;
if(isnan(x)){ memcpy(str, "NAN", 4); return str;}
else{
int i = isinf(x);
if(i){memcpy(str, "-INF", 5); if(i == 1) return str+1; else return str;}
}
char *s = str + 14; // go to end of buffer
uint8_t minus = 0;
if(x < 0){
x = -x;
minus = 1;
}
int pow = 0; // xxxEpow
// now convert float to 1.xxxE3y
while(x > 1000.f){
x /= 1000.f;
pow += 3;
}
if(x > 0.) while(x < 1.){
x *= 1000.f;
pow -= 3;
}
// print Eyy
if(pow){
uint8_t m = 0;
if(pow < 0){pow = -pow; m = 1;}
while(pow){
register int p10 = pow/10;
*s-- = '0' + (pow - 10*p10);
pow = p10;
}
if(m) *s-- = '-';
*s-- = 'E';
}
// now our number is in [1, 1000]
uint32_t units;
if(prec){
units = (uint32_t) x;
uint32_t decimals = (uint32_t)((x-units+rounds[prec])*pwr10[prec]);
// print decimals
while(prec){
register int d10 = decimals / 10;
*s-- = '0' + (decimals - 10*d10);
decimals = d10;
--prec;
}
// decimal point
*s-- = '.';
}else{ // without decimal part
units = (uint32_t) (x + 0.5);
}
// print main units
if(units == 0) *s-- = '0';
else while(units){
register uint32_t u10 = units / 10;
*s-- = '0' + (units - 10*u10);
units = u10;
}
if(minus) *s-- = '-';
return s+1;
}

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/*
* This file is part of the mlx90640 project.
* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <string.h>
#include "usb_dev.h"
#define printu(x) do{USB_sendstr(u2str(x));}while(0)
#define printi(x) do{USB_sendstr(i2str(x));}while(0)
#define printuhex(x) do{USB_sendstr(uhex2str(x));}while(0)
#define printfl(x,n) do{USB_sendstr(float2str(x, n));}while(0)
void u16s(uint16_t n, char *buf);
void hexdump16(int (*sendfun)(const char *s), uint16_t *arr, uint16_t len);
void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len);
const char *u2str(uint32_t val);
const char *i2str(int32_t i);
const char *uhex2str(uint32_t val);
const char *getnum(const char *txt, uint32_t *N);
char *omit_spaces(const char *buf);
const char *getint(const char *txt, int32_t *I);
char *float2str(float x, uint8_t prec);

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F3:F303/MLX90640multi/usb_descr.c
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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "usb_descr.h"
// low/high for uint16_t
#define L16(x) (x & 0xff)
#define H16(x) (x >> 8)
static const uint8_t USB_DeviceDescriptor[] = {
USB_DT_DEVICE_SIZE, // bLength
USB_DT_DEVICE, // bDescriptorType
L16(bcdUSB), // bcdUSB_L
H16(bcdUSB), // bcdUSB_H
USB_CLASS_MISC, // bDeviceClass
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0BUFSZ, // bMaxPacketSize
L16(idVendor), // idVendor_L
H16(idVendor), // idVendor_H
L16(idProduct), // idProduct_L
H16(idProduct), // idProduct_H
L16(bcdDevice_Ver), // bcdDevice_Ver_L
H16(bcdDevice_Ver), // bcdDevice_Ver_H
iMANUFACTURER_DESCR, // iManufacturer - indexes of string descriptors in array
iPRODUCT_DESCR, // iProduct
iSERIAL_DESCR, // iSerial
bNumConfigurations // bNumConfigurations
};
static const uint8_t USB_DeviceQualifierDescriptor[] = {
USB_DT_QUALIFIER_SIZE, //bLength
USB_DT_QUALIFIER, // bDescriptorType
L16(bcdUSB), // bcdUSB_L
H16(bcdUSB), // bcdUSB_H
USB_CLASS_PER_INTERFACE, // bDeviceClass
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0BUFSZ, // bMaxPacketSize0
bNumConfigurations, // bNumConfigurations
0 // Reserved
};
#define wTotalLength (USB_DT_CONFIG_SIZE + (bNumInterfaces * USB_DT_INTERFACE_SIZE) + (bTotNumEndpoints * USB_DT_ENDPOINT_SIZE) + (bNumCsInterfaces * USB_DT_CS_INTERFACE_SIZE) - 1)
static const uint8_t USB_ConfigDescriptor[] = {
// Configuration Descriptor
USB_DT_CONFIG_SIZE, // bLength: Configuration Descriptor size
USB_DT_CONFIG, // bDescriptorType: Configuration
L16(wTotalLength), // wTotalLength.L :no of returned bytes
H16(wTotalLength), // wTotalLength.H
bNumInterfaces, // bNumInterfaces
1, // bConfigurationValue: Current configuration value
0, // iConfiguration: Index of string descriptor describing the configuration or 0
BusPowered, // bmAttributes - Bus powered
50, // MaxPower in 2mA units
//---------------------------------------------------------------------------
// Virtual command Interface Descriptor
USB_DT_INTERFACE_SIZE, // bLength: Interface Descriptor size
USB_DT_INTERFACE, // bDescriptorType: Interface
0, // bInterfaceNumber: Number of Interface
0, // bAlternateSetting: Alternate setting
1, // bNumEndpoints: one for this
USB_CLASS_COMM, // bInterfaceClass
2, // bInterfaceSubClass: ACM
1, // bInterfaceProtocol: Common AT commands
iINTERFACE_DESCR1, // iInterface
// ---- CS Interfaces
USB_DT_CS_INTERFACE_SIZE, // bLength
USB_DT_CS_INTERFACE, // bDescriptorType: CS_INTERFACE
0, // bDescriptorSubtype: Header Func Desc
0x10, // bcdCDC: spec release number
1, // bDataInterface
USB_DT_CS_INTERFACE_SIZE, // bLength
USB_DT_CS_INTERFACE, // bDescriptorType: CS_INTERFACE
1, // bDescriptorSubtype: Call Management Func Desc
0, // bmCapabilities: D0+D1
1, // bDataInterface
USB_DT_CS_INTERFACE_SIZE-1, // bLength
USB_DT_CS_INTERFACE, // bDescriptorType: CS_INTERFACE
2, // bDescriptorSubtype: Abstract Control Management desc
2, // bmCapabilities
USB_DT_CS_INTERFACE_SIZE, // bLength
USB_DT_CS_INTERFACE, // bDescriptorType: CS_INTERFACE
6, // bDescriptorSubtype: Union func desc
0, // bMasterInterface: Communication class interface
1, // bSlaveInterface0: Data Class Interface
// Virtual endpoint 1 Descriptor
USB_DT_ENDPOINT_SIZE, // bLength: Endpoint Descriptor size
USB_DT_ENDPOINT, // bDescriptorType: Endpoint
0x8A, // bEndpointAddress IN10
USB_BM_ATTR_INTERRUPT, // bmAttributes: Interrupt
L16(USB_EP1BUFSZ), // wMaxPacketSize LO
H16(USB_EP1BUFSZ), // wMaxPacketSize HI
0x10, // bInterval: 16ms
//---------------------------------------------------------------------------
// Data interface
USB_DT_INTERFACE_SIZE, // bLength: Interface Descriptor size
USB_DT_INTERFACE, // bDescriptorType: Interface
1, // bInterfaceNumber: Number of Interface
0, // bAlternateSetting: Alternate setting
2, // bNumEndpoints: in and out
USB_CLASS_DATA, // bInterfaceClass
2, // bInterfaceSubClass: ACM
0, // bInterfaceProtocol
0, // iInterface
//Endpoint IN1 Descriptor
USB_DT_ENDPOINT_SIZE, // bLength: Endpoint Descriptor size
USB_DT_ENDPOINT, // bDescriptorType: Endpoint
0x81, // bEndpointAddress: IN1
USB_BM_ATTR_BULK, // bmAttributes: Bulk
L16(USB_TXBUFSZ), // wMaxPacketSize LO
H16(USB_TXBUFSZ), // wMaxPacketSize HI
0, // bInterval: ignore for Bulk transfer
// Endpoint OUT1 Descriptor
USB_DT_ENDPOINT_SIZE, // bLength: Endpoint Descriptor size
USB_DT_ENDPOINT, // bDescriptorType: Endpoint
0x01, // bEndpointAddress: OUT1
USB_BM_ATTR_BULK, // bmAttributes: Bulk
L16(USB_RXBUFSZ), // wMaxPacketSize LO
H16(USB_RXBUFSZ), // wMaxPacketSize HI
0, // bInterval: ignore for Bulk transfer
};
//const uint8_t HID_ReportDescriptor[];
_USB_LANG_ID_(LD, LANG_US);
_USB_STRING_(SD, u"0.0.1");
_USB_STRING_(MD, u"eddy@sao.ru");
_USB_STRING_(PD, u"MLX90640 sensor management");
_USB_STRING_(ID, u"mlx_sensor");
static const void* const StringDescriptor[iDESCR_AMOUNT] = {
[iLANGUAGE_DESCR] = &LD,
[iMANUFACTURER_DESCR] = &MD,
[iPRODUCT_DESCR] = &PD,
[iSERIAL_DESCR] = &SD,
[iINTERFACE_DESCR1] = &ID
};
static void wr0(const uint8_t *buf, uint16_t size, uint16_t askedsize){
if(askedsize < size) size = askedsize; // shortened request
if(size < USB_EP0BUFSZ){
EP_WriteIRQ(0, buf, size);
return;
}
while(size){
uint16_t l = size;
if(l > USB_EP0BUFSZ) l = USB_EP0BUFSZ;
EP_WriteIRQ(0, buf, l);
buf += l;
size -= l;
uint8_t needzlp = (l == USB_EP0BUFSZ) ? 1 : 0;
if(size || needzlp){ // send last data buffer
uint16_t epstatus = KEEP_DTOG(USB->EPnR[0]);
// keep DTOGs, clear CTR_RX,TX, set TX VALID, leave stat_Rx
USB->EPnR[0] = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX|USB_EPnR_STAT_RX))
^ USB_EPnR_STAT_TX;
uint32_t ctr = 1000000;
while(--ctr && (USB->ISTR & USB_ISTR_CTR) == 0){IWDG->KR = IWDG_REFRESH;};
if((USB->ISTR & USB_ISTR_CTR) == 0){
return;
}
if(needzlp) EP_WriteIRQ(0, NULL, 0);
}
}
}
void get_descriptor(config_pack_t *pack){
uint8_t descrtype = pack->wValue >> 8,
descridx = pack->wValue & 0xff;
switch(descrtype){
case DEVICE_DESCRIPTOR:
wr0(USB_DeviceDescriptor, sizeof(USB_DeviceDescriptor), pack->wLength);
break;
case CONFIGURATION_DESCRIPTOR:
wr0(USB_ConfigDescriptor, sizeof(USB_ConfigDescriptor), pack->wLength);
break;
case STRING_DESCRIPTOR:
if(descridx < iDESCR_AMOUNT){
wr0((const uint8_t *)StringDescriptor[descridx], *((uint8_t*)StringDescriptor[descridx]), pack->wLength);
}else{
EP_WriteIRQ(0, NULL, 0);
}
break;
case DEVICE_QUALIFIER_DESCRIPTOR:
wr0(USB_DeviceQualifierDescriptor, sizeof(USB_DeviceQualifierDescriptor), pack->wLength);
break;
/* case HID_REPORT_DESCRIPTOR:
wr0(HID_ReportDescriptor, sizeof(HID_ReportDescriptor), pack->wLength);
break;*/
default:
break;
}
}

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F3:F303/MLX90640multi/usb_descr.h
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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include "usb_lib.h"
// definition of parts common for USB_DeviceDescriptor & USB_DeviceQualifierDescriptor
// bcdUSB: 1.10
#define bcdUSB 0x0110
// Class - Misc (EF), subclass - common (2), protocol - interface association descr (1)
#define bDeviceSubClass 0x02
#define bDeviceProtocol 0x01
#define idVendor 0x0483
#define idProduct 0x5740
#define bcdDevice_Ver 0x0200
#define bNumConfigurations 1
// amount of interfaces and endpoints (except 0) used
#define bNumInterfaces 2
#define bTotNumEndpoints 3
#define bNumCsInterfaces 4
// powered
#define BusPowered (1<<7)
#define SelfPowered (1<<6)
#define RemoteWakeup (1<<5)
// buffer sizes
// for USB FS EP0 buffers are from 8 to 64 bytes long
#define USB_EP0BUFSZ 64
#define USB_EP1BUFSZ 10
// Rx/Tx EPs
#define USB_RXBUFSZ 64
#define USB_TXBUFSZ 64
// string descriptors
enum{
iLANGUAGE_DESCR,
iMANUFACTURER_DESCR,
iPRODUCT_DESCR,
iSERIAL_DESCR,
iINTERFACE_DESCR1,
iDESCR_AMOUNT
};
void get_descriptor(config_pack_t *pack);

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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "ringbuffer.h"
#include "usb_descr.h"
#include "usb_dev.h"
// Class-Specific Control Requests
#define SEND_ENCAPSULATED_COMMAND 0x00 // unused
#define GET_ENCAPSULATED_RESPONSE 0x01 // unused
#define SET_COMM_FEATURE 0x02 // unused
#define GET_COMM_FEATURE 0x03 // unused
#define CLEAR_COMM_FEATURE 0x04 // unused
#define SET_LINE_CODING 0x20
#define GET_LINE_CODING 0x21
#define SET_CONTROL_LINE_STATE 0x22
#define SEND_BREAK 0x23
// control line states
#define CONTROL_DTR 0x01
#define CONTROL_RTS 0x02
// inbuf overflow when receiving
static volatile uint8_t bufovrfl = 0;
// receive buffer: hold data until chkin() call
static uint8_t volatile rcvbuf[USB_RXBUFSZ];
static uint8_t volatile rcvbuflen = 0;
// line coding
usb_LineCoding WEAK lineCoding = {115200, 0, 0, 8};
// CDC configured and ready to use
volatile uint8_t CDCready = 0;
// ring buffers for incoming and outgoing data
static uint8_t obuf[RBOUTSZ], ibuf[RBINSZ];
static volatile ringbuffer rbout = {.data = obuf, .length = RBOUTSZ, .head = 0, .tail = 0};
static volatile ringbuffer rbin = {.data = ibuf, .length = RBINSZ, .head = 0, .tail = 0};
// last send data size
static volatile int lastdsz = 0;
static void chkin(){
if(bufovrfl) return; // allow user to know that previous buffer was overflowed and cleared
if(!rcvbuflen) return;
int w = RB_write((ringbuffer*)&rbin, (uint8_t*)rcvbuf, rcvbuflen);
if(w < 0){
return;
}
if(w != rcvbuflen) bufovrfl = 1;
rcvbuflen = 0;
uint16_t status = KEEP_DTOG(USB->EPnR[1]); // don't change DTOG
USB->EPnR[1] = (status & ~(USB_EPnR_STAT_TX|USB_EPnR_CTR_RX)) ^ USB_EPnR_STAT_RX; // prepare to get next data portion
}
// called from transmit EP to send next data portion or by user - when new transmission starts
static void send_next(){
uint8_t usbbuff[USB_TXBUFSZ];
int buflen = RB_read((ringbuffer*)&rbout, (uint8_t*)usbbuff, USB_TXBUFSZ);
if(buflen == 0){
if(lastdsz == 64) EP_Write(1, NULL, 0); // send ZLP after 64 bits packet when nothing more to send
lastdsz = 0;
return;
}else if(buflen < 0){
lastdsz = 0;
return;
}
EP_Write(1, (uint8_t*)usbbuff, buflen);
lastdsz = buflen;
}
// data IN/OUT handler
static void rxtx_handler(){
uint16_t epstatus = KEEP_DTOG(USB->EPnR[1]);
if(RX_FLAG(epstatus)){ // receive data
if(rcvbuflen){
bufovrfl = 1; // lost last data
rcvbuflen = 0;
}
rcvbuflen = EP_Read(1, (uint8_t*)rcvbuf);
USB->EPnR[1] = epstatus & ~(USB_EPnR_CTR_RX | USB_EPnR_STAT_RX | USB_EPnR_STAT_TX); // keep RX in STALL state until read data
chkin(); // try to write current data into RXbuf if it's not busy
}else{ // tx successfull
USB->EPnR[1] = (epstatus & ~(USB_EPnR_CTR_TX | USB_EPnR_STAT_TX)) ^ USB_EPnR_STAT_RX;
send_next();
}
}
// weak handlers: change them somewhere else if you want to setup USART
// SET_LINE_CODING
void WEAK linecoding_handler(usb_LineCoding *lc){
lineCoding = *lc;
}
// SET_CONTROL_LINE_STATE
void WEAK clstate_handler(uint16_t val){
CDCready = val; // CONTROL_DTR | CONTROL_RTS -> interface connected; 0 -> disconnected
}
// SEND_BREAK
void WEAK break_handler(){
CDCready = 0;
}
// USB is configured: setup endpoints
void set_configuration(){
EP_Init(1, EP_TYPE_BULK, USB_TXBUFSZ, USB_RXBUFSZ, rxtx_handler); // IN1 and OUT1
}
// PL2303 CLASS request
void usb_class_request(config_pack_t *req, uint8_t *data, uint16_t datalen){
uint8_t recipient = REQUEST_RECIPIENT(req->bmRequestType);
uint8_t dev2host = (req->bmRequestType & 0x80) ? 1 : 0;
switch(recipient){
case REQ_RECIPIENT_INTERFACE:
switch(req->bRequest){
case SET_LINE_CODING:
if(!data || !datalen) break; // wait for data
if(datalen == sizeof(usb_LineCoding))
linecoding_handler((usb_LineCoding*)data);
break;
case GET_LINE_CODING:
EP_WriteIRQ(0, (uint8_t*)&lineCoding, sizeof(lineCoding));
break;
case SET_CONTROL_LINE_STATE:
clstate_handler(req->wValue);
break;
case SEND_BREAK:
break_handler();
break;
default:
break;
}
break;
default:
if(dev2host) EP_WriteIRQ(0, NULL, 0);
}
if(!dev2host) EP_WriteIRQ(0, NULL, 0);
}
// blocking send full content of ring buffer
int USB_sendall(){
while(lastdsz > 0){
if(!CDCready) return FALSE;
}
return TRUE;
}
// put `buf` into queue to send
int USB_send(const uint8_t *buf, int len){
if(!buf || !CDCready || !len) return FALSE;
while(len){
int a = RB_write((ringbuffer*)&rbout, buf, len);
if(a > 0){
len -= a;
buf += a;
} else if (a < 0) continue; // do nothing if buffer is in reading state
if(lastdsz == 0) send_next(); // need to run manually - all data sent, so no IRQ on IN
}
return TRUE;
}
int USB_putbyte(uint8_t byte){
if(!CDCready) return FALSE;
int l = 0;
while((l = RB_write((ringbuffer*)&rbout, &byte, 1)) != 1){
if(l < 0) continue;
}
if(lastdsz == 0) send_next(); // need to run manually - all data sent, so no IRQ on IN
return TRUE;
}
int USB_sendstr(const char *string){
if(!string || !CDCready) return FALSE;
int len = 0;
const char *b = string;
while(*b++) ++len;
if(!len) return FALSE;
return USB_send((const uint8_t*)string, len);
}
/**
* @brief USB_receive - get binary data from receiving ring-buffer
* @param buf (i) - buffer for received data
* @param len - length of `buf`
* @return amount of received bytes (negative, if overfull happened)
*/
int USB_receive(uint8_t *buf, int len){
chkin();
if(bufovrfl){
while(1 != RB_clearbuf((ringbuffer*)&rbin));
bufovrfl = 0;
return -1;
}
int sz = RB_read((ringbuffer*)&rbin, buf, len);
if(sz < 0) return 0; // buffer in writting state
return sz;
}
/**
* @brief USB_receivestr - get string up to '\n' and replace '\n' with 0
* @param buf - receiving buffer
* @param len - its length
* @return strlen or negative value indicating overflow (if so, string won't be ends with 0 and buffer should be cleared)
*/
int USB_receivestr(char *buf, int len){
chkin();
if(bufovrfl){
while(1 != RB_clearbuf((ringbuffer*)&rbin));
bufovrfl = 0;
return -1;
}
int l = RB_readto((ringbuffer*)&rbin, '\n', (uint8_t*)buf, len);
if(l < 1){
if(rbin.length == RB_datalen((ringbuffer*)&rbin)){ // buffer is full but no '\n' found
while(1 != RB_clearbuf((ringbuffer*)&rbin));
return -1;
}
return 0;
}
if(l == 0) return 0;
buf[l-1] = 0; // replace '\n' with strend
return l;
}

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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stm32f3.h>
#include "usb_lib.h"
typedef struct {
uint32_t dwDTERate;
uint8_t bCharFormat;
#define USB_CDC_1_STOP_BITS 0
#define USB_CDC_1_5_STOP_BITS 1
#define USB_CDC_2_STOP_BITS 2
uint8_t bParityType;
#define USB_CDC_NO_PARITY 0
#define USB_CDC_ODD_PARITY 1
#define USB_CDC_EVEN_PARITY 2
#define USB_CDC_MARK_PARITY 3
#define USB_CDC_SPACE_PARITY 4
uint8_t bDataBits;
} __attribute__ ((packed)) usb_LineCoding;
extern usb_LineCoding lineCoding;
extern volatile uint8_t CDCready;
void break_handler();
void clstate_handler(uint16_t val);
void linecoding_handler(usb_LineCoding *lc);
// sizes of ringbuffers for outgoing and incoming data
#define RBOUTSZ (1024)
#define RBINSZ (1024)
#define newline() USB_putbyte('\n')
#define USND(s) do{USB_sendstr(s); USB_putbyte('\n');}while(0)
#define U(s) USB_sendstr(s)
int USB_sendall();
int USB_send(const uint8_t *buf, int len);
int USB_putbyte(uint8_t byte);
int USB_sendstr(const char *string);
int USB_receive(uint8_t *buf, int len);
int USB_receivestr(char *buf, int len);

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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include "usb_lib.h"
#include "usb_descr.h"
#include "usb_dev.h"
static ep_t endpoints[STM32ENDPOINTS];
static uint16_t USB_Addr = 0;
static uint8_t setupdatabuf[EP0DATABUF_SIZE];
static config_pack_t *setup_packet = (config_pack_t*) setupdatabuf;
volatile uint8_t usbON = 0; // device is configured and active
static uint16_t configuration = 0; // reply for GET_CONFIGURATION (==1 if configured)
static inline void std_d2h_req(){
uint16_t st = 0;
switch(setup_packet->bRequest){
case GET_DESCRIPTOR:
get_descriptor(setup_packet);
break;
case GET_STATUS:
EP_WriteIRQ(0, (uint8_t *)&st, 2); // send status: Bus Powered
break;
case GET_CONFIGURATION:
EP_WriteIRQ(0, (uint8_t*)&configuration, 1);
break;
default:
EP_WriteIRQ(0, NULL, 0);
break;
}
}
static inline void std_h2d_req(){
switch(setup_packet->bRequest){
case SET_ADDRESS:
// new address will be assigned later - after acknowlegement or request to host
USB_Addr = setup_packet->wValue;
break;
case SET_CONFIGURATION:
// Now device configured
configuration = setup_packet->wValue;
set_configuration();
usbON = 1;
break;
default:
break;
}
}
void WEAK usb_standard_request(){
uint8_t recipient = REQUEST_RECIPIENT(setup_packet->bmRequestType);
uint8_t dev2host = (setup_packet->bmRequestType & 0x80) ? 1 : 0;
switch(recipient){
case REQ_RECIPIENT_DEVICE:
if(dev2host){
std_d2h_req();
}else{
std_h2d_req();
}
break;
case REQ_RECIPIENT_INTERFACE:
if(dev2host && setup_packet->bRequest == GET_DESCRIPTOR){
get_descriptor(setup_packet);
}
break;
case REQ_RECIPIENT_ENDPOINT:
if(setup_packet->bRequest == CLEAR_FEATURE){
}else{ /* wrong */ }
break;
default:
break;
}
if(!dev2host) EP_WriteIRQ(0, NULL, 0);
}
void WEAK usb_class_request(config_pack_t *req, uint8_t _U_ *data, uint16_t _U_ datalen){
switch(req->bRequest){
case GET_INTERFACE:
break;
case SET_CONFIGURATION: // set featuring by req->wValue
break;
default:
break;
}
if(0 == (setup_packet->bmRequestType & 0x80)) // host2dev
EP_WriteIRQ(0, NULL, 0);
}
void WEAK usb_vendor_request(config_pack_t _U_ *packet, uint8_t _U_ *data, uint16_t _U_ datalen){
if(0 == (setup_packet->bmRequestType & 0x80)) // host2dev
EP_WriteIRQ(0, NULL, 0);
}
/*
bmRequestType: 76543210
7 direction: 0 - host->device, 1 - device->host
65 type: 0 - standard, 1 - class, 2 - vendor
4..0 getter: 0 - device, 1 - interface, 2 - endpoint, 3 - other
*/
/**
* Endpoint0 (control) handler
*/
static void EP0_Handler(){
uint8_t ep0dbuflen = 0;
uint8_t ep0databuf[EP0DATABUF_SIZE];
uint16_t epstatus = KEEP_DTOG(USB->EPnR[0]); // EP0R on input -> return this value after modifications
int rxflag = RX_FLAG(epstatus);
//if(rxflag){ }
// check direction
if(USB->ISTR & USB_ISTR_DIR){ // OUT interrupt - receive data, CTR_RX==1 (if CTR_TX == 1 - two pending transactions: receive following by transmit)
if(epstatus & USB_EPnR_SETUP){ // setup packet -> copy data to conf_pack
EP_Read(0, setupdatabuf);
// interrupt handler will be called later
}else if(epstatus & USB_EPnR_CTR_RX){ // data packet -> push received data to ep0databuf
//if(endpoints[0].rx_cnt){ }
ep0dbuflen = EP_Read(0, ep0databuf);
}
}
if(rxflag){
uint8_t reqtype = REQUEST_TYPE(setup_packet->bmRequestType);
switch(reqtype){
case REQ_TYPE_STANDARD:
if(SETUP_FLAG(epstatus)){
usb_standard_request();
}else{ }
break;
case REQ_TYPE_CLASS:
usb_class_request(setup_packet, ep0databuf, ep0dbuflen);
break;
case REQ_TYPE_VENDOR:
usb_vendor_request(setup_packet, ep0databuf, ep0dbuflen);
break;
default:
EP_WriteIRQ(0, NULL, 0);
break;
}
}
if(TX_FLAG(epstatus)){
// now we can change address after enumeration
if ((USB->DADDR & USB_DADDR_ADD) != USB_Addr){
USB->DADDR = USB_DADDR_EF | USB_Addr;
usbON = 0;
}
}
//epstatus = KEEP_DTOG(USB->EPnR[0]);
if(rxflag) epstatus ^= USB_EPnR_STAT_TX; // start ZLP or data transmission
else epstatus &= ~USB_EPnR_STAT_TX; // or leave unchanged
// keep DTOGs, clear CTR_RX,TX, set RX VALID
USB->EPnR[0] = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX)) ^ USB_EPnR_STAT_RX;
}
/**
* Write data to EP buffer (called from IRQ handler)
* @param number - EP number
* @param *buf - array with data
* @param size - its size
*/
void EP_WriteIRQ(uint8_t number, const uint8_t *buf, uint16_t size){
if(size > endpoints[number].txbufsz) size = endpoints[number].txbufsz;
uint16_t N2 = (size + 1) >> 1;
// the buffer is 16-bit, so we should copy data as it would be uint16_t
uint16_t *buf16 = (uint16_t *)buf;
#if defined USB1_16
// very bad: what if `size` is odd?
uint32_t *out = (uint32_t *)endpoints[number].tx_buf;
for(int i = 0; i < N2; ++i, ++out){
*out = buf16[i];
}
#elif defined USB2_16
// use mememcpy instead?
for(int i = 0; i < N2; i++){
endpoints[number].tx_buf[i] = buf16[i];
}
#else
#error "Define USB1_16 or USB2_16"
#endif
USB_BTABLE->EP[number].USB_COUNT_TX = size;
}
/**
* Write data to EP buffer (called outside IRQ handler)
* @param number - EP number
* @param *buf - array with data
* @param size - its size
*/
void EP_Write(uint8_t number, const uint8_t *buf, uint16_t size){
EP_WriteIRQ(number, buf, size);
uint16_t epstatus = KEEP_DTOG(USB->EPnR[number]);
// keep DTOGs and RX stat, clear CTR_TX & set TX VALID to start transmission
USB->EPnR[number] = (epstatus & ~(USB_EPnR_CTR_TX | USB_EPnR_STAT_RX)) ^ USB_EPnR_STAT_TX;
}
/*
* Copy data from EP buffer into user buffer area
* @param *buf - user array for data
* @return amount of data read
*/
int EP_Read(uint8_t number, uint8_t *buf){
int sz = endpoints[number].rx_cnt;
if(!sz) return 0;
endpoints[number].rx_cnt = 0;
#if defined USB1_16
int n = (sz + 1) >> 1;
uint32_t *in = (uint32_t*)endpoints[number].rx_buf;
uint16_t *out = (uint16_t*)buf;
for(int i = 0; i < n; ++i, ++in)
out[i] = *(uint16_t*)in;
#elif defined USB2_16
// use mememcpy instead?
for(int i = 0; i < sz; ++i)
buf[i] = endpoints[number].rx_buf[i];
#else
#error "Define USB1_16 or USB2_16"
#endif
return sz;
}
static uint16_t lastaddr = LASTADDR_DEFAULT;
/**
* Endpoint initialisation
* @param number - EP num (0...7)
* @param type - EP type (EP_TYPE_BULK, EP_TYPE_CONTROL, EP_TYPE_ISO, EP_TYPE_INTERRUPT)
* @param txsz - transmission buffer size @ USB/CAN buffer
* @param rxsz - reception buffer size @ USB/CAN buffer
* @param uint16_t (*func)(ep_t *ep) - EP handler function
* @return 0 if all OK
*/
int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)(ep_t ep)){
if(number >= STM32ENDPOINTS) return 4; // out of configured amount
if(txsz > USB_BTABLE_SIZE/ACCESSZ || rxsz > USB_BTABLE_SIZE/ACCESSZ) return 1; // buffer too large
if(lastaddr + txsz + rxsz >= USB_BTABLE_SIZE/ACCESSZ) return 2; // out of btable
USB->EPnR[number] = (type << 9) | (number & USB_EPnR_EA);
USB->EPnR[number] ^= USB_EPnR_STAT_RX | USB_EPnR_STAT_TX_1;
if(rxsz & 1) return 3; // wrong rx buffer size
uint16_t countrx = 0;
if(rxsz < 64) countrx = rxsz / 2;
else{
if(rxsz & 0x1f) return 3; // should be multiple of 32
countrx = 31 + rxsz / 32;
}
USB_BTABLE->EP[number].USB_ADDR_TX = lastaddr;
endpoints[number].tx_buf = (uint16_t *)(USB_BTABLE_BASE + lastaddr * ACCESSZ);
endpoints[number].txbufsz = txsz;
lastaddr += txsz;
USB_BTABLE->EP[number].USB_COUNT_TX = 0;
USB_BTABLE->EP[number].USB_ADDR_RX = lastaddr;
endpoints[number].rx_buf = (uint8_t *)(USB_BTABLE_BASE + lastaddr * ACCESSZ);
lastaddr += rxsz;
USB_BTABLE->EP[number].USB_COUNT_RX = countrx << 10;
endpoints[number].func = func;
return 0;
}
// standard IRQ handler
void USB_IRQ(){
uint32_t CNTR = USB->CNTR;
USB->CNTR = 0;
if(USB->ISTR & USB_ISTR_RESET){
usbON = 0;
// Reinit registers
CNTR = USB_CNTR_RESETM | USB_CNTR_CTRM | USB_CNTR_SUSPM;
// Endpoint 0 - CONTROL
// ON USB LS size of EP0 may be 8 bytes, but on FS it should be 64 bytes!
lastaddr = LASTADDR_DEFAULT;
// clear address, leave only enable bit
USB->DADDR = USB_DADDR_EF;
USB->ISTR = ~USB_ISTR_RESET;
if(EP_Init(0, EP_TYPE_CONTROL, USB_EP0BUFSZ, USB_EP0BUFSZ, EP0_Handler)){
return;
};
}
if(USB->ISTR & USB_ISTR_CTR){
// EP number
uint8_t n = USB->ISTR & USB_ISTR_EPID;
// copy received bytes amount
endpoints[n].rx_cnt = USB_BTABLE->EP[n].USB_COUNT_RX & 0x3FF; // low 10 bits is counter
// call EP handler
if(endpoints[n].func) endpoints[n].func();
}
if(USB->ISTR & USB_ISTR_WKUP){ // wakeup
#ifndef STM32F0
CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LP_MODE | USB_CNTR_WKUPM); // clear suspend flags
#else
CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LPMODE | USB_CNTR_WKUPM);
#endif
USB->ISTR = ~USB_ISTR_WKUP;
}
if(USB->ISTR & USB_ISTR_SUSP){ // suspend -> still no connection, may sleep
usbON = 0;
#ifndef STM32F0
CNTR |= USB_CNTR_FSUSP | USB_CNTR_LP_MODE | USB_CNTR_WKUPM;
#else
CNTR |= USB_CNTR_FSUSP | USB_CNTR_LPMODE | USB_CNTR_WKUPM;
#endif
CNTR &= ~(USB_CNTR_SUSPM);
USB->ISTR = ~USB_ISTR_SUSP;
}
USB->CNTR = CNTR; // rewoke interrupts
}
// here we suppose that all PIN settings done in hw_setup earlier
void USB_setup(){
#if defined STM32F3
NVIC_DisableIRQ(USB_LP_IRQn);
// remap USB LP & Wakeup interrupts to 75 and 76 - works only on pure F303
RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN; // enable tacting of SYSCFG
SYSCFG->CFGR1 |= SYSCFG_CFGR1_USB_IT_RMP;
#elif defined STM32F1
NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
NVIC_DisableIRQ(USB_HP_CAN1_TX_IRQn);
#elif defined STM32F0
NVIC_DisableIRQ(USB_IRQn);
RCC->APB1ENR |= RCC_APB1ENR_CRSEN;
RCC->CFGR3 &= ~RCC_CFGR3_USBSW; // reset USB
RCC->CR2 |= RCC_CR2_HSI48ON; // turn ON HSI48
uint32_t tmout = 16000000;
while(!(RCC->CR2 & RCC_CR2_HSI48RDY)){if(--tmout == 0) break;}
FLASH->ACR = FLASH_ACR_PRFTBE | FLASH_ACR_LATENCY;
CRS->CFGR &= ~CRS_CFGR_SYNCSRC;
CRS->CFGR |= CRS_CFGR_SYNCSRC_1; // USB SOF selected as sync source
CRS->CR |= CRS_CR_AUTOTRIMEN; // enable auto trim
CRS->CR |= CRS_CR_CEN; // enable freq counter & block CRS->CFGR as read-only
RCC->CFGR |= RCC_CFGR_SW;
#endif
RCC->APB1ENR |= RCC_APB1ENR_USBEN;
//??
USB->CNTR = USB_CNTR_FRES; // Force USB Reset
for(uint32_t ctr = 0; ctr < 72000; ++ctr) nop(); // wait >1ms
USB->CNTR = 0;
USB->BTABLE = 0;
USB->DADDR = 0;
USB->ISTR = 0;
USB->CNTR = USB_CNTR_RESETM; // allow only reset interrupts
#if defined STM32F3
NVIC_EnableIRQ(USB_LP_IRQn);
#elif defined STM32F1
NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
#elif defined STM32F0
USB->BCDR |= USB_BCDR_DPPU;
NVIC_EnableIRQ(USB_IRQn);
#endif
}
#if defined STM32F3
void usb_lp_isr() __attribute__ ((alias ("USB_IRQ")));
#elif defined STM32F1
void usb_lp_can_rx0_isr() __attribute__ ((alias ("USB_IRQ")));
#elif defined STM32F0
void usb_isr() __attribute__ ((alias ("USB_IRQ")));
#endif

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/*
* Copyright 2024 Edward V. Emelianov <edward.emelianoff@gmail.com>.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdint.h>
#include <wchar.h>
#ifndef _U_
#define _U_ __attribute__((unused))
#endif
/******************************************************************
* Hardware registers etc *
*****************************************************************/
#if defined STM32F0
#include <stm32f0.h>
#elif defined STM32F1
#include <stm32f1.h>
// there's no this define in standard header
#define USB_BASE ((uint32_t)0x40005C00)
#elif defined STM32F3
#include <stm32f3.h>
#endif
// max endpoints number
#define STM32ENDPOINTS 8
/**
* Buffers size definition
**/
// F0 - USB2_16; F1 - USB1_16; F3 - 1/2 depending on series
#if !defined USB1_16 && !defined USB2_16
#if defined STM32F0
#define USB2_16
#elif defined STM32F1
#define USB1_16
#else
#error "Can't determine USB1_16 or USB2_16, define by hands"
#endif
#endif
// BTABLE_SIZE FOR STM32F3:
// In STM32F303/302xB/C, 512 bytes SRAM is not shared with CAN.
// In STM32F302x6/x8 and STM32F30xxD/E, 726 bytes dedicated SRAM and 256 bytes shared SRAM with CAN i.e.
// 1Kbytes dedicated SRAM in case CAN is disabled.
// remember, that USB_BTABLE_SIZE will be divided by ACCESSZ, so don't divide it twice for 32-bit addressing
#ifdef NOCAN
#if defined STM32F0
#define USB_BTABLE_SIZE 1024
#elif defined STM32F3
#define USB_BTABLE_SIZE 726
//#warning "Please, check real buffer size due to docs"
#else
#error "define STM32F0 or STM32F3"
#endif
#else // !NOCAN: F0/F3 with CAN or F1 (can't simultaneously run CAN and USB)
#if defined STM32F0
#define USB_BTABLE_SIZE 768
#elif defined STM32F3
#define USB_BTABLE_SIZE 726
//#warning "Please, check real buffer size due to docs"
#else // STM32F103: 1024 bytes but with 32-bit addressing
#define USB_BTABLE_SIZE 1024
#endif
#endif // NOCAN
// first 64 bytes of USB_BTABLE are registers!
#define USB_BTABLE_BASE 0x40006000
#define USB ((USB_TypeDef *) USB_BASE)
#ifdef USB_BTABLE
#undef USB_BTABLE
#endif
#define USB_BTABLE ((USB_BtableDef *)(USB_BTABLE_BASE))
#define USB_ISTR_EPID 0x0000000F
#define USB_FNR_LSOF_0 0x00000800
#define USB_FNR_lSOF_1 0x00001000
#define USB_LPMCSR_BESL_0 0x00000010
#define USB_LPMCSR_BESL_1 0x00000020
#define USB_LPMCSR_BESL_2 0x00000040
#define USB_LPMCSR_BESL_3 0x00000080
#define USB_EPnR_CTR_RX 0x00008000
#define USB_EPnR_DTOG_RX 0x00004000
#define USB_EPnR_STAT_RX 0x00003000
#define USB_EPnR_STAT_RX_0 0x00001000
#define USB_EPnR_STAT_RX_1 0x00002000
#define USB_EPnR_SETUP 0x00000800
#define USB_EPnR_EP_TYPE 0x00000600
#define USB_EPnR_EP_TYPE_0 0x00000200
#define USB_EPnR_EP_TYPE_1 0x00000400
#define USB_EPnR_EP_KIND 0x00000100
#define USB_EPnR_CTR_TX 0x00000080
#define USB_EPnR_DTOG_TX 0x00000040
#define USB_EPnR_STAT_TX 0x00000030
#define USB_EPnR_STAT_TX_0 0x00000010
#define USB_EPnR_STAT_TX_1 0x00000020
#define USB_EPnR_EA 0x0000000F
#define USB_COUNTn_RX_BLSIZE 0x00008000
#define USB_COUNTn_NUM_BLOCK 0x00007C00
#define USB_COUNTn_RX 0x0000003F
#define USB_TypeDef USB_TypeDef_custom
typedef struct {
__IO uint32_t EPnR[STM32ENDPOINTS];
__IO uint32_t RESERVED[STM32ENDPOINTS];
__IO uint32_t CNTR;
__IO uint32_t ISTR;
__IO uint32_t FNR;
__IO uint32_t DADDR;
__IO uint32_t BTABLE;
#ifdef STM32F0
__IO uint32_t LPMCSR;
__IO uint32_t BCDR;
#endif
} USB_TypeDef;
// F303 D/E have 2x16 access scheme
typedef struct{
#if defined USB2_16
__IO uint16_t USB_ADDR_TX;
__IO uint16_t USB_COUNT_TX;
__IO uint16_t USB_ADDR_RX;
__IO uint16_t USB_COUNT_RX;
#define ACCESSZ (1)
#define BUFTYPE uint8_t
#elif defined USB1_16
__IO uint32_t USB_ADDR_TX;
__IO uint32_t USB_COUNT_TX;
__IO uint32_t USB_ADDR_RX;
__IO uint32_t USB_COUNT_RX;
#define ACCESSZ (2)
#define BUFTYPE uint16_t
#else
#error "Define USB1_16 or USB2_16"
#endif
} USB_EPDATA_TypeDef;
typedef struct{
__IO USB_EPDATA_TypeDef EP[STM32ENDPOINTS];
} USB_BtableDef;
#define EP0DATABUF_SIZE (64)
#define LASTADDR_DEFAULT (STM32ENDPOINTS * 8)
/******************************************************************
* Defines from usb.h *
*****************************************************************/
/*
* Device and/or Interface Class codes
*/
#define USB_CLASS_PER_INTERFACE 0
#define USB_CLASS_AUDIO 1
#define USB_CLASS_COMM 2
#define USB_CLASS_HID 3
#define USB_CLASS_PRINTER 7
#define USB_CLASS_PTP 6
#define USB_CLASS_MASS_STORAGE 8
#define USB_CLASS_HUB 9
#define USB_CLASS_DATA 10
#define USB_CLASS_MISC 0xef
#define USB_CLASS_VENDOR_SPEC 0xff
/*
* Descriptor types
*/
#define USB_DT_DEVICE 0x01
#define USB_DT_CONFIG 0x02
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_QUALIFIER 0x06
#define USB_DT_IAD 0x0B
#define USB_DT_HID 0x21
#define USB_DT_REPORT 0x22
#define USB_DT_PHYSICAL 0x23
#define USB_DT_CS_INTERFACE 0x24
#define USB_DT_HUB 0x29
/*
* Descriptor sizes per descriptor type
*/
#define USB_DT_DEVICE_SIZE 18
#define USB_DT_CONFIG_SIZE 9
#define USB_DT_INTERFACE_SIZE 9
#define USB_DT_HID_SIZE 9
#define USB_DT_ENDPOINT_SIZE 7
#define USB_DT_QUALIFIER_SIZE 10
#define USB_DT_CS_INTERFACE_SIZE 5
#define USB_DT_IAD_SIZE 8
// bmRequestType & 0x80 == dev2host (1) or host2dev (0)
// recipient: bmRequestType & 0x1f
#define REQUEST_RECIPIENT(b) (b & 0x1f)
#define REQ_RECIPIENT_DEVICE 0
#define REQ_RECIPIENT_INTERFACE 1
#define REQ_RECIPIENT_ENDPOINT 2
#define REQ_RECIPIENT_OTHER 3
// type: [bmRequestType & 0x60 >> 5]
#define REQUEST_TYPE(b) ((b&0x60)>>5)
#define REQ_TYPE_STANDARD 0
#define REQ_TYPE_CLASS 1
#define REQ_TYPE_VENDOR 2
#define REQ_TYPE_RESERVED 3
//#define VENDOR_REQUEST 0x01
// standard device requests
#define GET_STATUS 0x00
#define CLEAR_FEATURE 0x01
#define SET_FEATURE 0x03
#define SET_ADDRESS 0x05
#define GET_DESCRIPTOR 0x06
#define SET_DESCRIPTOR 0x07
#define GET_CONFIGURATION 0x08
#define SET_CONFIGURATION 0x09
// and some standard interface requests
#define GET_INTERFACE 0x0A
#define SET_INTERFACE 0x0B
// and some standard endpoint requests
#define SYNC_FRAME 0x0C
// Types of descriptors
#define DEVICE_DESCRIPTOR 0x01
#define CONFIGURATION_DESCRIPTOR 0x02
#define STRING_DESCRIPTOR 0x03
#define DEVICE_QUALIFIER_DESCRIPTOR 0x06
#define DEBUG_DESCRIPTOR 0x0a
#define HID_REPORT_DESCRIPTOR 0x22
// EP types for EP_init
#define EP_TYPE_BULK 0x00
#define EP_TYPE_CONTROL 0x01
#define EP_TYPE_ISO 0x02
#define EP_TYPE_INTERRUPT 0x03
// EP types for descriptors
#define USB_BM_ATTR_CONTROL 0x00
#define USB_BM_ATTR_ISO 0x01
#define USB_BM_ATTR_BULK 0x02
#define USB_BM_ATTR_INTERRUPT 0x03
/******************************************************************
* Other stuff *
*****************************************************************/
#define RX_FLAG(epstat) (epstat & USB_EPnR_CTR_RX)
#define TX_FLAG(epstat) (epstat & USB_EPnR_CTR_TX)
#define SETUP_FLAG(epstat) (epstat & USB_EPnR_SETUP)
// EPnR bits manipulation
#define KEEP_DTOG_STAT(EPnR) (EPnR & ~(USB_EPnR_STAT_RX|USB_EPnR_STAT_TX|USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
#define KEEP_DTOG(EPnR) (EPnR & ~(USB_EPnR_DTOG_RX|USB_EPnR_DTOG_TX))
#define LANG_US (uint16_t)0x0409
#define _USB_STRING_(name, str) \
static const struct name \
{ \
uint8_t bLength; \
uint8_t bDescriptorType; \
uint16_t bString[(sizeof(str) - 2) / 2]; \
\
} \
name = {sizeof(name), 0x03, str}
#define _USB_LANG_ID_(name, lng_id) \
static const struct name \
{ \
uint8_t bLength; \
uint8_t bDescriptorType; \
uint16_t bString; \
\
} \
name = {0x04, 0x03, lng_id}
// EP0 configuration packet
typedef struct {
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} config_pack_t;
// endpoints state
typedef struct{
uint16_t *tx_buf; // transmission buffer address
uint16_t txbufsz; // transmission buffer size
uint8_t *rx_buf; // reception buffer address
void (*func)(); // endpoint action function
unsigned rx_cnt : 10; // received data counter
} ep_t;
extern volatile uint8_t usbON;
void USB_setup();
int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)());
void EP_WriteIRQ(uint8_t number, const uint8_t *buf, uint16_t size);
void EP_Write(uint8_t number, const uint8_t *buf, uint16_t size);
int EP_Read(uint8_t number, uint8_t *buf);
// could be [re]defined in usb_dev.c
extern void usb_class_request(config_pack_t *packet, uint8_t *data, uint16_t datalen);
extern void usb_vendor_request(config_pack_t *packet, uint8_t *data, uint16_t datalen);
extern void set_configuration();

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#define BUILD_NUMBER "14"
#define BUILD_DATE "2025-09-22"