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add pre-pre...-pre alpha of NitrogenFlooding

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Edward Emelianov 2023-03-20 23:45:51 +03:00
parent b18dee64e8
commit 2dae136516
34 changed files with 15639 additions and 0 deletions
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230
F3:F303/Multistepper/pdnuart.c.dma Normal file
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/*
* This file is part of the multistepper 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 "hardware.h"
#include "proto.h"
extern volatile uint32_t Tms;
#define MAXBUFLEN (8)
// Rx timeout, ms
#define PDNUART_TIMEOUT (20)
// buffers format: 0 - sync+reserved, 1 - address (0..3 - slave, 0xff - master)
// 2 - register<<1 | RW, 3 - CRC (r) or [ 3..6 - MSB data, 7 - CRC ]
// buf[0] - USART2, buf[1] - USART3
static uint8_t inbuf[2][MAXBUFLEN], outbuf[2][MAXBUFLEN];
static uint8_t Taccess[2] = {0}; // last access time
static int curslaveaddr[2] = {-1, -1}; // current slave address for each USART (0..3)
static uint8_t notfound = 0; // not found mask (LSB - 0, MSB - 7)
static uint8_t readrq[2] = {0}; // ==1 for read request (after send wait to read)
// UART states
typedef enum{
PDU_IDLE,
PDU_TX,
PDU_TXREADY,
PDU_RX,
PDU_RXREADY
} pdnuart_state;
static pdnuart_state state[2] = {PDU_IDLE, PDU_IDLE};
// datalen == 3 for read request or 7 for writing
static void calcCRC(int no, int datalen){
uint8_t crc = 0;
for(int i = 0; i < datalen; ++i){
uint8_t currentByte = outbuf[no][i];
for(int j = 0; j < 8; ++j){
if((crc >> 7) ^ (currentByte & 0x01)) crc = (crc << 1) ^ 0x07;
else crc <<= 1;
currentByte = currentByte >> 1;
}
}
outbuf[no][datalen] = crc;
}
static volatile DMA_Channel_TypeDef *TxDMA[2] = {DMA1_Channel7, DMA1_Channel2};
static volatile DMA_Channel_TypeDef *RxDMA[2] = {DMA1_Channel6, DMA1_Channel3};
static volatile USART_TypeDef *USART[2] = {USART2, USART3};
static void setup_usart(int no){
USART[no]->ICR = 0xffffffff; // clear all flags
TxDMA[no]->CCR = 0;
TxDMA[no]->CPAR = (uint32_t) &USART[no]->TDR; // periph
TxDMA[no]->CCR |= DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_TCIE; // 8bit, mem++, mem->per, transcompl irq
RxDMA[no]->CCR = 0;
RxDMA[no]->CPAR = (uint32_t) &USART[no]->RDR; // periph
RxDMA[no]->CCR |= DMA_CCR_MINC | DMA_CCR_TCIE; // 8bit, mem++, per->mem, transcompl irq
USART[no]->BRR = 72000000 / 256000; // 256 kbaud
USART[no]->CR3 = USART_CR3_DMAT | USART_CR3_DMAR | USART_CR3_HDSEL; // enable DMA Tx/Rx, single wire
USART[no]->CR1 = USART_CR1_TE | USART_CR1_RE | USART_CR1_UE; // 1start,8data,nstop; enable Rx,Tx,USART
uint32_t tmout = 16000000;
while(!(USART[no]->ISR & USART_ISR_TC)){if(--tmout == 0) break;} // polling idle frame Transmission
USART[no]->ICR = 0xffffffff; // clear all flags again
}
// USART2 (ch0..3): DMA1ch6 (Rx), DMA1_ch7 (Tx)
// USART3 (ch4..7): DMA1ch3 (Rx), DMA1_ch2 (Tx)
// pins are setting up in `hardware.c`
void pdnuart_setup(){
RCC->APB1ENR |= RCC_APB1ENR_USART2EN | RCC_APB1ENR_USART3EN;
RCC->AHBENR |= RCC_AHBENR_DMA1EN;
setup_usart(0);
setup_usart(1);
NVIC_EnableIRQ(DMA1_Channel2_IRQn);
NVIC_EnableIRQ(DMA1_Channel3_IRQn);
NVIC_EnableIRQ(DMA1_Channel6_IRQn);
NVIC_EnableIRQ(DMA1_Channel7_IRQn);
}
static int rwreg(uint8_t motorno, uint8_t reg, uint32_t data, int w){
if(motorno >= MOTORSNO || reg & 0x80) return FALSE;
int no = motorno >> 2;
if(state[no] != PDU_IDLE) return FALSE;
outbuf[no][0] = 0xa0;
outbuf[no][1] = curslaveaddr[no] = motorno - (no << 2);
outbuf[no][2] = reg << 1;
int nbytes = 3;
if(w){
outbuf[no][2] |= 1;
for(int i = 6; i > 2; --i){
outbuf[no][i] = data & 0xff;
data >>= 8;
}
nbytes = 7;
readrq[no] = 0;
}else{
readrq[no] = 1;
}
calcCRC(no, nbytes);
TxDMA[no]->CMAR = (uint32_t) outbuf[no];
TxDMA[no]->CNDTR = nbytes + 1;
TxDMA[no]->CCR |= DMA_CCR_EN; // start transmission
state[no] = PDU_TX;
Taccess[no] = Tms;
return TRUE;
}
// return FALSE if failed
int pdnuart_writereg(uint8_t motorno, uint8_t reg, uint32_t data){
return rwreg(motorno, reg, data, 1);
}
// return FALSE if failed
int pdnuart_readreg(uint8_t motorno, uint8_t reg){
return rwreg(motorno, reg, 0, 0);
}
static void disableDMA(int no){
TxDMA[no]->CCR &= ~DMA_CCR_EN;
RxDMA[no]->CCR &= ~DMA_CCR_EN;
readrq[no] = 0;
state[no] = PDU_IDLE;
}
static void parseRx(int no){
USB_sendstr("Got from ");
USB_putbyte('#'); printu(curslaveaddr[no] + no*4); USB_sendstr(": ");
for(int i = 0; i < 8; ++i){
printuhex(inbuf[no][i]); USB_putbyte(' ');
}
newline();
}
void pdnuart_poll(){
for(int i = 0; i < 2; ++i){
int showno = 0;
uint32_t time = Tms - Taccess[i];
switch(state[i]){
case PDU_TX:
if(time > PDNUART_TIMEOUT){
USB_sendstr("PDN/UART timeout: Tx problem ");
showno = 1;
disableDMA(i);
}
break;
case PDU_TXREADY:
USB_sendstr("Tx ready ");
showno = 1;
break;
case PDU_RX:
if(time > PDNUART_TIMEOUT){
USB_sendstr("PDN/UART timeout: no answer ");
notfound |= 1 << (curslaveaddr[i] + 4*i);
showno = 1;
disableDMA(i);
}
break;
case PDU_RXREADY:
parseRx(i);
state[i] = PDU_IDLE; // DMA already turned off
break;
default: // IDLE
return;
}
if(showno){
USB_putbyte('#'); printu(curslaveaddr[i] + 4*i); newline();
}
}
}
// USART2 Tx complete -> prepare Rx
void dma1_channel7_isr(){
DMA1_Channel7->CCR &= ~DMA_CCR_EN;
DMA1->IFCR |= DMA_IFCR_CTCIF7;
if(!readrq[0]){ // there was a setter
state[0] = PDU_TXREADY;
return;
}
DMA1_Channel6->CMAR = (uint32_t) inbuf[0];
DMA1_Channel6->CCR |= DMA_CCR_EN;
DMA1_Channel6->CNDTR = MAXBUFLEN;
state[0] = PDU_RX;
Taccess[0] = Tms;
}
// USART3 Tx complete -> prepare Rx
void dma1_channel2_isr(){
DMA1_Channel2->CCR &= ~DMA_CCR_EN;
DMA1->IFCR |= DMA_IFCR_CTCIF2;
if(!readrq[1]){ // there was a setter
state[1] = PDU_TXREADY;
return;
}
DMA1_Channel3->CMAR = (uint32_t) inbuf[1];
DMA1_Channel3->CCR |= DMA_CCR_EN;
DMA1_Channel3->CNDTR = MAXBUFLEN;
state[1] = PDU_RX;
Taccess[1] = Tms;
}
// USART2 Rx complete -> set flag
void dma1_channel6_isr(){
DMA1_Channel6->CCR &= ~DMA_CCR_EN;
DMA1->IFCR |= DMA_IFCR_CTCIF6;
state[0] = PDU_RXREADY;
}
// USART3 Rx complete -> set flag
void dma1_channel3_isr(){
DMA1_Channel3->CCR &= ~DMA_CCR_EN;
DMA1->IFCR |= DMA_IFCR_CTCIF3;
state[1] = PDU_RXREADY;
}

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F3:F303/NitrogenFlooding/Makefile Normal file
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BINARY := nitrogen
# MCU code
MCU := F302xc
# change this linking script depending on particular MCU model,
LDSCRIPT := stm32f302xB.ld
DEFINES := -DUSB1_16
include ../makefile.f3
include ../../makefile.stm32

204
F3:F303/NitrogenFlooding/Readme.md Normal file
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Automated liquid nitrogen flooding machine
====================================
# Pinout
(all GPIO outs are push-pull if not mentioned another)
### Sorted by pin number
|**Pin #**|**Pin name **| **function**| **settings**|**comment ** |
|---------|-------------|-------------|-------------|------------------|
| 1 | PE2 | PWM0 | AF2 | TIM3 channels |
| 2 | PE3 | PWM1 | AF2 | as PWM output |
| 3 | PE4 | PWM2 | AF2 | |
| 4 | PE5 | PWM3 | AF2 | |
| 5 | PE6 | - | - | |
| 6 | (vbat) | | | |
| 7 | PC13 | - | - | |
| 8 | PC14 | - | - | |
| 9 | PC15 | - | - | |
| 10 | PF9 | - | - | |
| 11 | PF10 | VadcON | slow out | turn ON ADC power|
| 12 | PF0 | OSC IN | | |
| 13 | PF1 | OSC OUT | | |
| 14 | (nrst) | | | |
| 15 | PC0 | ADC5 | ADC1 in 6 | Thermometers |
| 16 | PC1 | ADC6 | ADC1 in 7 | (level-meter) |
| 17 | PC2 | ADC7 | ADC1 in 8 | ADC channels |
| 18 | PC3 | ADC8 | ADC1 in 9 | |
| 19 | PF2 | ADC9 | ADC1 in 10 | |
| 20 | (VSSA) | | | |
| 21 | (VREF+) | | | |
| 22 | (VDDA) | | | |
| 23 | PA0 | ADC0 | ADC1 in1 | |
| 24 | PA1 | ADC1 | ADC1 in2 | |
| 25 | PA2 | ADC2 | ADC1 in3 | |
| 26 | PA3 | ADC3 | ADC1 in4 | |
| 27 | PF4 | ADC4 | ADC1 in5 | |
| 28 | (VDD) | | | |
| 29 | PA4 | ADC ext. | ADC2 in1 | ext. ADC channel |
| 30 | PA5 | - | - | |
| 31 | PA6 | - | - | |
| 32 | PA7 | - | - | |
| 33 | PC4 | - | - | External USART |
| 34 | PC5 | - | - | |
| 35 | PB0 | Buzzer | slow out | Signal buzzer |
| 36 | PB1 | - | - | |
| 37 | PB2 | - | - | |
| 38 | PE7 | - | - | |
| 39 | PE8 | LED0 | slow out | External LEDs |
| 40 | PE9 | LED1 | slow out | |
| 41 | PE10 | LED2 | slow out | |
| 42 | PE11 | LED3 | slow out | |
| 43 | PE12 | - | - | |
| 44 | PE13 | - | - | |
| 45 | PE14 | - | - | |
| 46 | PE15 | - | - | |
| 47 | PB10 | SCRN DCRS | slow out | Screen data/cmd |
| 48 | PB11 | SCRN RST | slow out | Screen reset |
| 49 | (VSS) | | | |
| 50 | (VDD) | | | |
| 51 | PB12 | SCRN NSS | slow out | Screen activate |
| 52 | PB13 | SCRN SCK | AF5 | SPI for screen |
| 53 | PB14 | SCRN MISO | AF5 | |
| 54 | PB15 | SCRN MOSI | AF5 | |
| 55 | PD8 | - | - | |
| 56 | PD9 | BTN0 | slow in PU | User buttons |
| 57 | PD10 | BTN1 | slow in PU | |
| 58 | PD11 | BTN2 | slow in PU | |
| 59 | PD12 | BTN3 | slow in PU | |
| 60 | PD13 | BTN4 | slow in PU | |
| 61 | PD14 | BTN5 | slow in PU | |
| 62 | PD15 | BTN6 | slow in PU | |
| 63 | PC6 | - | - | |
| 64 | PC7 | - | - | |
| 65 | PC8 | - | - | |
| 66 | PC9 | USB PU | slow out | USB DP pullup |
| 67 | PA8 | - | - | |
| 68 | PA9 | SCL | AF4 (I2C2) | external ADC |
| 69 | PA10 | SDA | AF4 | |
| 70 | PA11 | USB DM | AF14 | USB |
| 71 | PA12 | USB DP | AF14 | |
| 72 | PA13 | SWDIO | dflt | dbg |
| 73 | PF6 | - | - | |
| 74 | (VSS) | | | |
| 75 | (VDD) | | | |
| 76 | PA14 | SWCLK | dflt | dbg |
| 77 | PA15 | - | - | |
| 78 | PC10 | Tx | AF7 (USART3)| Ext. UART |
| 79 | PC11 | Rx | AF7 | (alt.: AF5 - U4)|
| 80 | PC12 | - | - | |
| 81 | PD0 | CAN Rx | AF7 (CAN) | CAN bus |
| 82 | PD1 | CAN Tx | AF7 | |
| 83 | PD2 | - | - | |
| 84 | PD3 | - | - | |
| 85 | PD4 | DE | slow out | 0-rx, 1-tx (485) |
| 86 | PD5 | U2Tx | AF7 | RS-485 |
| 87 | PD6 | U2Rx | AF7 | |
| 88 | PD7 | - | - | |
| 89 | PB3 | - | - | |
| 90 | PB4 | - | - | |
| 91 | PB5 | - | - | |
| 92 | PB6 | I2C1 SCL | AF4 (I2C1) | I2C for BME280 |
| 93 | PB7 | I2C1 SDA | AF4 | |
| 94 | (BOOT0) | | | boot mode |
| 95 | PB8 | - | - | |
| 96 | PB9 | - | - | |
| 97 | PE0 | - | - | |
| 98 | PE1 | - | - | |
| 99 | (VSS) | | | |
| 100 | (VDD) | | | |
### Sorted by port
// sort -Vk4 Readme.md
|**Pin #**|**Pin name **| **function**| **settings**|**comment ** |
| 23 | PA0 | ADC0 | ADC1 in1 | |
| 24 | PA1 | ADC1 | ADC1 in2 | |
| 25 | PA2 | ADC2 | ADC1 in3 | |
| 26 | PA3 | ADC3 | ADC1 in4 | |
| 29 | PA4 | ADC ext. | ADC2 in1 | ext. ADC channel |
| 30 | PA5 | - | - | |
| 31 | PA6 | - | - | |
| 32 | PA7 | - | - | |
| 67 | PA8 | - | - | |
| 68 | PA9 | SCL | AF4 (I2C2) | external ADC |
| 69 | PA10 | SDA | AF4 | |
| 70 | PA11 | USB DM | AF14 | USB |
| 71 | PA12 | USB DP | AF14 | |
| 72 | PA13 | SWDIO | AF0 | dbg |
| 76 | PA14 | SWCLK | AF0 | dbg |
| 77 | PA15 | - | - | |
| 35 | PB0 | Buzzer | slow out | Signal buzzer |
| 36 | PB1 | - | - | |
| 37 | PB2 | - | - | |
| 89 | PB3 | - | - | |
| 90 | PB4 | - | - | |
| 91 | PB5 | - | - | |
| 92 | PB6 | I2C1 SCL | AF4 (I2C1) | I2C for BME280 |
| 93 | PB7 | I2C1 SDA | AF4 | |
| 95 | PB8 | - | - | |
| 96 | PB9 | - | - | |
| 47 | PB10 | SCRN DCRS | slow out | Screen data/cmd |
| 48 | PB11 | SCRN RST | slow out | Screen reset |
| 51 | PB12 | SCRN NSS | slow out | Screen activate |
| 52 | PB13 | SCRN SCK | AF5 | SPI for screen |
| 53 | PB14 | SCRN MISO | AF5 | |
| 54 | PB15 | SCRN MOSI | AF5 | |
| 15 | PC0 | ADC5 | ADC1 in 6 | Thermometers |
| 16 | PC1 | ADC6 | ADC1 in 7 | (level-meter) |
| 17 | PC2 | ADC7 | ADC1 in 8 | ADC channels |
| 18 | PC3 | ADC8 | ADC1 in 9 | |
| 33 | PC4 | - | - | External USART |
| 34 | PC5 | - | - | |
| 63 | PC6 | - | - | |
| 64 | PC7 | - | - | |
| 65 | PC8 | - | - | |
| 66 | PC9 | USB PU | slow out | USB DP pullup |
| 78 | PC10 | Tx | AF7 (USART3)| Ext. UART |
| 79 | PC11 | Rx | AF7 | (alt.: AF5 - U4)|
| 80 | PC12 | - | - | |
| 7 | PC13 | - | - | |
| 8 | PC14 | - | - | |
| 9 | PC15 | - | - | |
| 81 | PD0 | CAN Rx | AF7 (CAN) | CAN bus |
| 82 | PD1 | CAN Tx | AF7 | |
| 83 | PD2 | - | - | |
| 84 | PD3 | - | - | |
| 85 | PD4 | DE | slow out | 0-rx, 1-tx (485) |
| 86 | PD5 | U2Tx | AF7 | RS-485 |
| 87 | PD6 | U2Rx | AF7 | |
| 88 | PD7 | - | - | |
| 55 | PD8 | - | - | |
| 56 | PD9 | BTN0 | slow in PU | User buttons |
| 57 | PD10 | BTN1 | slow in PU | |
| 58 | PD11 | BTN2 | slow in PU | |
| 59 | PD12 | BTN3 | slow in PU | |
| 60 | PD13 | BTN4 | slow in PU | |
| 61 | PD14 | BTN5 | slow in PU | |
| 62 | PD15 | BTN6 | slow in PU | |
| 97 | PE0 | - | - | |
| 98 | PE1 | - | - | |
| 1 | PE2 | PWM0 | AF2 | TIM3 channels |
| 2 | PE3 | PWM1 | AF2 | as PWM output |
| 3 | PE4 | PWM2 | AF2 | |
| 4 | PE5 | PWM3 | AF2 | |
| 5 | PE6 | - | - | |
| 38 | PE7 | - | - | |
| 39 | PE8 | LED0 | slow out | External LEDs |
| 40 | PE9 | LED1 | slow out | |
| 41 | PE10 | LED2 | slow out | |
| 42 | PE11 | LED3 | slow out | |
| 43 | PE12 | - | - | |
| 44 | PE13 | - | - | |
| 45 | PE14 | - | - | |
| 46 | PE15 | - | - | |
| 12 | PF0 | OSC IN | | |
| 13 | PF1 | OSC OUT | | |
| 19 | PF2 | ADC9 | ADC1 in 10 | |
| 73 | PF6 | - | - | |
| 10 | PF9 | - | - | |
| 11 | PF10 | VadcON | slow out | turn ON ADC power|
|---------|-------------|-------------|-------------|------------------|

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F3:F303/NitrogenFlooding/adc.c Normal file
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/*
* This file is part of the nitrogen 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 "adc.h"
#ifdef EBUG
#include "proto.h"
#endif
/**
* @brief ADCx_array - arrays for ADC channels with median filtering:
* ADC1:
* 0..9 - AIN0..9 (ADC1_IN1..10)
* 4 - internal Tsens - ADC1_IN16
* ADC2:
* 6 - AINext - (ADC2 in 1)
*/
static uint16_t ADC_array[NUMBER_OF_ADC_CHANNELS*9];
TRUE_INLINE void calADC(ADC_TypeDef *chnl){
// calibration
// enable voltage regulator
chnl->CR = 0;
chnl->CR = ADC_CR_ADVREGEN_0;
// wait for 10us
uint16_t ctr = 0;
while(++ctr < 1000){nop();}
// ADCALDIF=0 (single channels)
if((chnl->CR & ADC_CR_ADEN)){
chnl->CR |= ADC_CR_ADSTP;
chnl->CR |= ADC_CR_ADDIS;
}
chnl->CR |= ADC_CR_ADCAL;
while((chnl->CR & ADC_CR_ADCAL) != 0 && ++ctr < 0xfff0){};
chnl->CR = ADC_CR_ADVREGEN_0;
// enable ADC
ctr = 0;
do{
chnl->CR |= ADC_CR_ADEN;
}while((chnl->ISR & ADC_ISR_ADRDY) == 0 && ++ctr < 0xfff0);
}
TRUE_INLINE void enADC(ADC_TypeDef *chnl){
// ADEN->1, wait ADRDY
chnl->CR |= ADC_CR_ADEN;
uint16_t ctr = 0;
while(!(chnl->ISR & ADC_ISR_ADRDY) && ++ctr < 0xffff){}
chnl->CR |= ADC_CR_ADSTART; /* start the ADC conversions */
}
/**
* ADC1 - DMA1_ch1
* ADC2 - DMA2_ch1
*/
// Setup ADC and DAC
void adc_setup(){
RCC->AHBENR |= RCC_AHBENR_ADC12EN; // Enable clocking
ADC12_COMMON->CCR = ADC_CCR_TSEN | ADC_CCR_CKMODE; // enable Tsens, HCLK/4
calADC(ADC1);
calADC(ADC2);
// ADC1: channels 1-10,16; ADC2: channel 1
ADC1->SMPR1 = ADC_SMPR1_SMP1 | ADC_SMPR1_SMP2 | ADC_SMPR1_SMP3 | ADC_SMPR1_SMP4 | ADC_SMPR1_SMP5
| ADC_SMPR1_SMP6 | ADC_SMPR1_SMP7 | ADC_SMPR1_SMP8 | ADC_SMPR1_SMP9 ;
ADC1->SMPR2 = ADC_SMPR2_SMP10 | ADC_SMPR2_SMP16;
// 11 conversions in group: 1...10->16
ADC1->SQR1 = (1<<6) | (2<<12) | (3<<18) | (4<<24) | (NUMBER_OF_ADC1_CHANNELS-1);
ADC1->SQR2 = (5<<0) | (6<<6) | (7<<12) | (8<<18) | (9<<24);
ADC1->SQR3 = (10<<0)| (16<<6);
ADC2->SMPR1 = ADC_SMPR1_SMP1;
ADC2->SQR1 = (1<<6) | (NUMBER_OF_ADC2_CHANNELS-1);
// configure DMA for ADC
RCC->AHBENR |= RCC_AHBENR_DMA1EN | RCC_AHBENR_DMA2EN;
ADC1->CFGR = ADC_CFGR_CONT | ADC_CFGR_DMAEN | ADC_CFGR_DMACFG;
ADC2->CFGR = ADC_CFGR_CONT | ADC_CFGR_DMAEN | ADC_CFGR_DMACFG;
DMA1_Channel1->CPAR = (uint32_t) (&(ADC1->DR));
DMA1_Channel1->CMAR = (uint32_t)(ADC_array);
DMA1_Channel1->CNDTR = NUMBER_OF_ADC1_CHANNELS * 9;
DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 | DMA_CCR_CIRC;
DMA1_Channel1->CCR |= DMA_CCR_EN;
DMA2_Channel1->CPAR = (uint32_t) (&(ADC2->DR));
DMA2_Channel1->CMAR = (uint32_t)(&ADC_array[ADC2START]);
DMA2_Channel1->CNDTR = NUMBER_OF_ADC2_CHANNELS * 9;
DMA2_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 | DMA_CCR_CIRC;
DMA2_Channel1->CCR |= DMA_CCR_EN;
enADC(ADC1);
enADC(ADC2);
}
/**
* @brief getADCval - calculate median value for `nch` channel
* @param nch - number of channel
* @return
*/
uint16_t getADCval(int nch){
register uint16_t temp;
#define PIX_SORT(a,b) { if ((a)>(b)) PIX_SWAP((a),(b)); }
#define PIX_SWAP(a,b) { temp=(a);(a)=(b);(b)=temp; }
uint16_t p[9];
int adval = (nch >= NUMBER_OF_ADC1_CHANNELS) ? NUMBER_OF_ADC2_CHANNELS : NUMBER_OF_ADC1_CHANNELS;
int addr = (nch >= NUMBER_OF_ADC1_CHANNELS) ? nch - NUMBER_OF_ADC2_CHANNELS + ADC2START: nch;
for(int i = 0; i < 9; ++i, addr += adval) // first we should prepare array for optmed
p[i] = ADC_array[addr];
PIX_SORT(p[1], p[2]) ; PIX_SORT(p[4], p[5]) ; PIX_SORT(p[7], p[8]) ;
PIX_SORT(p[0], p[1]) ; PIX_SORT(p[3], p[4]) ; PIX_SORT(p[6], p[7]) ;
PIX_SORT(p[1], p[2]) ; PIX_SORT(p[4], p[5]) ; PIX_SORT(p[7], p[8]) ;
PIX_SORT(p[0], p[3]) ; PIX_SORT(p[5], p[8]) ; PIX_SORT(p[4], p[7]) ;
PIX_SORT(p[3], p[6]) ; PIX_SORT(p[1], p[4]) ; PIX_SORT(p[2], p[5]) ;
PIX_SORT(p[4], p[7]) ; PIX_SORT(p[4], p[2]) ; PIX_SORT(p[6], p[4]) ;
PIX_SORT(p[4], p[2]) ;
#undef PIX_SORT
#undef PIX_SWAP
#ifdef EBUG
DBG("val: "); printu(p[4]); newline();
#endif
return p[4];
}
// get voltage @input nch (V)
float getADCvoltage(int nch){
float v = getADCval(nch) * 3.3;
v /= 4096.f; // 12bit ADC
#ifdef EBUG
DBG("v="); printf(v); newline();
#endif
return v;
}
// return MCU temperature (degrees of celsius)
float getMCUtemp(){
// make correction on Vdd value
int32_t ADval = getADCval(ADC_TSENS);
float temperature = ADval - (float) *TEMP30_CAL_ADDR;
temperature *= (110.f - 30.f);
temperature /= (float)(*TEMP110_CAL_ADDR - *TEMP30_CAL_ADDR);
temperature += 30.f;
#ifdef EBUG
DBG("t="); printf(temperature); newline();
#endif
return(temperature);
}

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/*
* This file is part of the nitrogen 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 <stm32f3.h>
// ADC1 channels
#define NUMBER_OF_ADC1_CHANNELS (11)
// ADC2 channels
#define NUMBER_OF_ADC2_CHANNELS (1)
// total number of channels - for array
#define NUMBER_OF_ADC_CHANNELS ((NUMBER_OF_ADC1_CHANNELS+NUMBER_OF_ADC2_CHANNELS))
// ADC1 in1..10 - inner and outern Tsens; ADC2 in1 - ext ADC
// channels of ADC in array
#define ADC_AIN0 (0)
#define ADC_AIN1 (1)
#define ADC_AIN2 (2)
#define ADC_AIN3 (3)
#define ADC_AIN4 (4)
#define ADC_AIN5 (5)
#define ADC_AIN6 (6)
#define ADC_AIN7 (7)
#define ADC_AIN8 (8)
#define ADC_AIN9 (9)
#define MERG(a,b) a ## b
#define ADC_CHAN(x) MERG(ADC_AIN, x)
#define ADC_TSENS (10)
#define ADC_EXT (11)
// starting index of ADC2
#define ADC2START (9*NUMBER_OF_ADC1_CHANNELS)
void adc_setup();
float getMCUtemp();
uint16_t getADCval(int nch);
float getADCvoltage(int nch);

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/*
* This file is part of the nitrogen 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 "hardware.h"
int LEDsON = 0;
// setup here ALL GPIO pins (due to table in Readme.md)
// leave SWD as default AF; high speed for CLK and some other AF; med speed for some another AF
TRUE_INLINE void gpio_setup(){
RCC->AHBENR |= RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN | RCC_AHBENR_GPIOCEN | RCC_AHBENR_GPIODEN
| RCC_AHBENR_GPIOEEN | RCC_AHBENR_GPIOFEN;
// enable PWM timer TIM3
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
for(int i = 0; i < 10000; ++i) nop();
// PORT A
GPIOA->ODR = 0;
GPIOA->AFR[0] = 0;
GPIOA->AFR[1] = AFRf(4, 9) | AFRf(4, 10) | AFRf(14, 11) | AFRf(14,12);
GPIOA->MODER = MODER_AI(0) | MODER_AI(1) | MODER_AI(2) | MODER_AI(3) | MODER_AI(4) |
MODER_AF(9) | MODER_AF(10) | MODER_AF(11) | MODER_AF(12) | MODER_AF(13) | MODER_AF(14);
GPIOA->OSPEEDR = OSPEED_HI(9) | OSPEED_HI(10) | OSPEED_HI(11) | OSPEED_HI(12) | OSPEED_HI(13) | OSPEED_HI(14);
GPIOA->OTYPER = 0;
GPIOA->PUPDR = 0;
// PORT B
GPIOB->ODR = 0;
GPIOB->AFR[0] = AFRf(4, 6) | AFRf(4, 7);
GPIOB->AFR[1] = AFRf(5, 13) | AFRf(5, 14) | AFRf(5, 15);
GPIOB->MODER = MODER_O(0) | MODER_AF(6) | MODER_AF(7) | MODER_O(10) | MODER_O(11) | MODER_O(12) | MODER_AF(13)
| MODER_AF(14) | MODER_AF(15);
GPIOB->OSPEEDR = OSPEED_HI(6) | OSPEED_HI(7) | OSPEED_MED(13) | OSPEED_MED(14) | OSPEED_MED(15);
GPIOB->OTYPER = 0;
GPIOB->PUPDR = 0;
// PORT C
GPIOC->ODR = 0;
GPIOC->AFR[0] = 0;
GPIOC->AFR[1] = AFRf(7, 10) | AFRf(7, 11);
GPIOC->MODER = MODER_AI(0) | MODER_AI(1) | MODER_AI(2) | MODER_AI(3) | MODER_O(9) | MODER_AF(10) | MODER_AF(11);
GPIOC->OSPEEDR = OSPEED_HI(10);
GPIOC->OTYPER = 0;
GPIOC->PUPDR = 0;
// PORT D
GPIOD->ODR = 0;
GPIOD->AFR[0] = AFRf(7, 0) | AFRf(7, 1) | AFRf(7, 5) | AFRf(7, 6);
GPIOD->AFR[1] = 0;
GPIOD->MODER = MODER_AF(0) | MODER_AF(1) | MODER_O(4) | MODER_AF(5) | MODER_AF(6) | MODER_I(9)
| MODER_I(10) | MODER_I(11) | MODER_I(12) | MODER_I(13) | MODER_I(14) | MODER_I(15);
GPIOD->OSPEEDR = OSPEED_HI(1) | OSPEED_HI(5);
GPIOD->OTYPER = 0;
GPIOD->PUPDR = PUPD_PU(9) | PUPD_PU(10) | PUPD_PU(11) | PUPD_PU(12) | PUPD_PU(13) | PUPD_PU(14) | PUPD_PU(15);
// PORT E
GPIOE->ODR = 0;
GPIOE->AFR[0] = 0;
GPIOE->AFR[1] = AFRf(2, 2) | AFRf(2, 3) | AFRf(2, 4) | AFRf(2, 5);
GPIOE->MODER = MODER_AF(2) | MODER_AF(3) | MODER_AF(4) | MODER_AF(5) | MODER_O(8) | MODER_O(9) | MODER_O(10) | MODER_O(11);
GPIOE->OSPEEDR = 0;
GPIOE->OTYPER = 0;
GPIOE->PUPDR = 0;
// PORT F
GPIOF->ODR = 0;
GPIOF->AFR[0] = 0;
GPIOF->AFR[1] = 0;
GPIOF->MODER = MODER_AI(2) | MODER_O(10);
GPIOF->OSPEEDR = 0;
GPIOF->OTYPER = 0;
GPIOF->PUPDR = 0;
}
#ifndef EBUG
TRUE_INLINE void iwdg_setup(){
uint32_t tmout = 16000000;
/* Enable the peripheral clock RTC */
/* (1) Enable the LSI (40kHz) */
/* (2) Wait while it is not ready */
RCC->CSR |= RCC_CSR_LSION; /* (1) */
while((RCC->CSR & RCC_CSR_LSIRDY) != RCC_CSR_LSIRDY){if(--tmout == 0) break;} /* (2) */
/* Configure IWDG */
/* (1) Activate IWDG (not needed if done in option bytes) */
/* (2) Enable write access to IWDG registers */
/* (3) Set prescaler by 64 (1.6ms for each tick) */
/* (4) Set reload value to have a rollover each 2s */
/* (5) Check if flags are reset */
/* (6) Refresh counter */
IWDG->KR = IWDG_START; /* (1) */
IWDG->KR = IWDG_WRITE_ACCESS; /* (2) */
IWDG->PR = IWDG_PR_PR_1; /* (3) */
IWDG->RLR = 1250; /* (4) */
tmout = 16000000;
while(IWDG->SR){if(--tmout == 0) break;} /* (5) */
IWDG->KR = IWDG_REFRESH; /* (6) */
}
#endif
void hw_setup(){
gpio_setup();
#ifndef EBUG
iwdg_setup();
#endif
}

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/*
* This file is part of the nitrogen 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 <stm32f3.h>
// "PCLK" frequency
// really APB1=36M -> TIM2/3/4/6/7 f=72M, APB2=72M -> TIM1/8/15/16/17/20 f=72M
#ifndef PCLK
#define PCLK (72000000)
#endif
// USB pullup: PC9
#define USBPU_port GPIOC
#define USBPU_pin (1<<9)
#define USBPU_ON() pin_clear(USBPU_port, USBPU_pin)
#define USBPU_OFF() pin_set(USBPU_port, USBPU_pin)
// LEDs PE8, PE9, PE10, PE11
#define CONC(a,b,c) a ## b ## c
#define MKPIN(a,n) CONC(a, n, _pin)
#define LEDs_port (GPIOE)
#define LEDS_AMOUNT (4)
#define LED0_pin (1<<8)
#define LED1_pin (1<<9)
#define LED2_pin (1<<10)
#define LED3_pin (1<<11)
#define LED_blink(x) do{if(LEDsON) pin_toggle(LEDs_port, 1<<(8+x));}while(0)
#define LED_off(x) do{pin_set(LEDs_port, 1<<(8+x));}while(0)
#define LED_on(x) do{if(LEDsON) pin_clear(LEDs_port, 1<<(8+x));}while(0)
#define LED_get(x) (LEDs_port->IDR & 1<<(8+x) ? 0 : 1)
// Buttons amount
#define BTNSNO (7)
#define BTNs_port GPIOD
// Buttons: PD9, PD10, PD11, PD12, PD13, PD14, PD15: pullup (active - 0)
#define BTN0_pin (1<<9)
#define BTN1_pin (1<<10)
#define BTN2_pin (1<<11)
#define BTN3_pin (1<<12)
#define BTN4_pin (1<<13)
#define BTN5_pin (1<<14)
#define BTN6_pin (1<<15)
// state 0 - pressed, 1 - released
#define BTN_state(x) (BTNs_port->IDR & 1<<(9+x) ? 0 : 1)
extern volatile uint32_t Tms;
extern int LEDsON;
uint8_t MSB(uint16_t val);
void hw_setup();

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/*
* This file is part of the nitrogen 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 "adc.h"
//#include "buttons.h"
//#include "can.h"
//#include "flash.h"
#include "hardware.h"
#include "proto.h"
#include "usb.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(); // make a reconnection
//flashstorage_init();
hw_setup();
USB_setup();
//CAN_setup(the_conf.CANspeed);
adc_setup();
USBPU_ON();
uint32_t ctr = 0;
// CAN_message *can_mesg;
while(1){
IWDG->KR = IWDG_REFRESH;
if(Tms - ctr > 499){
ctr = Tms;
LED_blink(0);
}
/*CAN_proc();
if(CAN_get_status() == CAN_FIFO_OVERRUN){
USB_sendstr("CAN bus fifo overrun occured!\n");
}
while((can_mesg = CAN_messagebuf_pop())){
if(can_mesg && isgood(can_mesg->ID)){
if(ShowMsgs){ // display message content
IWDG->KR = IWDG_REFRESH;
uint8_t len = can_mesg->length;
printu(Tms);
USB_sendstr(" #");
printuhex(can_mesg->ID);
for(uint8_t i = 0; i < len; ++i){
USB_putbyte(' ');
printuhex(can_mesg->data[i]);
}
USB_putbyte('\n');
}
}
}*/
USB_proc();
int l = USB_receivestr(inbuff, MAXSTRLEN);
if(l < 0) USB_sendstr("ERROR: USB buffer overflow or string was too long\n");
else if(l){
const char *ans = cmd_parser(inbuff);
if(ans) USB_sendstr(ans);
}
//process_keys();
}
}

BIN
F3:F303/NitrogenFlooding/nitrogen.bin Executable file
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F3:F303/NitrogenFlooding/nitrogen.cflags Normal file
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-std=c17

8
F3:F303/NitrogenFlooding/nitrogen.config Normal file
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// Add predefined macros for your project here. For example:
// #define THE_ANSWER 42
#define EBUG
#define STM32F3
#define STM32F303xd
#define __thumb2__ 1
#define __ARM_ARCH_7M__
#define USB2_16

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F3:F303/NitrogenFlooding/nitrogen.creator Normal file
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F3:F303/NitrogenFlooding/nitrogen.creator.user Normal file
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Развёртывание</value>
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Развёртывание</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.CustomExecutableRunConfiguration</value>
<value type="QString" key="ProjectExplorer.RunConfiguration.BuildKey"></value>
<value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
<value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
<value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
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1
F3:F303/NitrogenFlooding/nitrogen.cxxflags Normal file
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-std=c++17

34
F3:F303/NitrogenFlooding/nitrogen.files Normal file
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adc.c
adc.h
buttons.c
buttons.h
can.c
can.h
commonproto.c
commonproto.h
flash.c
flash.h
hardware.c
hardware.h
hashgen/hashgen.c
hashgen/hdr.c
hashgen/hdr.h
hashgen/test.c
main.c
pdnuart.c
pdnuart.h
proto.c
proto.h
ringbuffer.c
ringbuffer.h
steppers.c
steppers.h
strfunc.c
strfunc.h
tmc2209.h
usb.c
usb.h
usb_lib.c
usb_lib.h
usbhw.c
usbhw.h

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.
../inc
../inc/Fx
../inc/cm
../inc/ld
../inc/startup

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F3:F303/NitrogenFlooding/openocd.cfg Normal file
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set FLASH_SIZE 0x20000
source [find interface/stlink-v2-1.cfg]
source [find target/stm32f3x.cfg]

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/*
* This file is part of the nitrogen 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 "hardware.h"
#include "proto.h"
#include "strfunc.h"
#include "version.inc"
#include <stm32f3.h>
#include <string.h>
// parno - number of parameter (or -1); cargs - string with arguments (after '=') (==NULL for getter), iarg - integer argument
static int goodstub(int _U_ parno, const char _U_ *carg, int32_t _U_ iarg){
return RET_GOOD;
}
static int leds(int parno, const char *c, int32_t i){
if(parno < 0){ // enable/disable all
if(c){ LEDsON = i ? 1 : 0;}
USB_sendstr("LED="); USB_sendstr(u2str(LEDsON));
}else{
if(parno >= LEDS_AMOUNT) return RET_WRONGARG;
if(c) switch(i){
case 2: LED_blink(parno); break;
case 1: LED_on(parno); break;
default: LED_off(parno);
}
USB_sendstr("LED"); USB_putbyte('0' + parno);
USB_putbyte('='); USB_sendstr(u2str(LED_get(parno))); newline();
}
newline();
return RET_GOOD;
}
typedef struct{
int (*fn)(int, const char*, int32_t);
const char *cmd;
const char *help;
} commands;
commands cmdlist[] = {
{goodstub, "stub", "simple stub"},
{leds, "LED", "LEDx=y; where x=0..3 to work with single LED (then y=1-set, 0-reset, 2-toggle), absent to work with all (y=0 - disable, 1-enable)"},
{NULL, NULL, NULL}
};
static void printhelp(){
commands *c = cmdlist;
USB_sendstr("https://github.com/eddyem/stm32samples/tree/master/F3:F303/NitrogenFlooding build#" BUILD_NUMBER " @ " BUILD_DATE "\n");
while(c->fn){
USB_sendstr(c->cmd);
USB_sendstr(" - ");
USB_sendstr(c->help);
newline();
++c;
}
}
static int parsecmd(const char *str){
char cmd[CMD_MAXLEN + 1];
if(!str || !*str) return RET_CMDNOTFOUND;
int i = 0;
while(*str > '@' && i < CMD_MAXLEN){ cmd[i++] = *str++; }
cmd[i] = 0;
int parno = -1;
int32_t iarg = __INT32_MAX__;
if(*str){
uint32_t N;
const char *nxt = getnum(str, &N);
if(nxt != str) parno = (int) N;
str = strchr(str, '=');
if(str){
str = omit_spaces(++str);
getint(str, &iarg);
}
}
commands *c = cmdlist;
while(c->fn){
if(strcmp(c->cmd, cmd) == 0) return c->fn(parno, str, iarg);
++c;
}
return RET_CMDNOTFOUND;
}
/**
* @brief cmd_parser - command parsing
* @param txt - buffer with commands & data
*/
const char *cmd_parser(const char *txt){
int ret = parsecmd(txt);
switch(ret){
case RET_CMDNOTFOUND: printhelp(); return NULL; break;
case RET_WRONGARG: return "Wrong command parameters\n"; break;
case RET_GOOD: return NULL; break;
default: return "FAIL\n"; break;
}
}

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/*
* This file is part of the nitrogen 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>
#include "strfunc.h"
#include "usb.h"
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#define CMD_MAXLEN (32)
enum{
RET_CMDNOTFOUND = -2,
RET_WRONGARG = -1,
RET_GOOD = 0,
RET_BAD = 1
};
#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 printf(x) do{USB_sendstr(float2str(x, 2));}while(0)
extern uint8_t ShowMsgs; // show CAN messages flag
const char *cmd_parser(const char *txt);

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F3:F303/NitrogenFlooding/ringbuffer.c Normal file
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/*
* This file is part of the nitrogen 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 "ringbuffer.h"
// stored data length
int RB_datalen(ringbuffer *b){
if(b->tail >= b->head) return (b->tail - b->head);
else return (b->length - b->head + b->tail);
}
/**
* @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
*/
int RB_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;
}
// poor memcpy
static void mcpy(uint8_t *targ, const uint8_t *src, int l){
while(l--) *targ++ = *src++;
}
// increment head or tail
TRUE_INLINE void incr(ringbuffer *b, volatile int *what, int n){
*what += n;
if(*what >= b->length) *what -= b->length;
}
/**
* @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
*/
int RB_read(ringbuffer *b, uint8_t *s, int len){
int l = RB_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;
mcpy(s, b->data + b->head, _1st);
if(_1st < len && l > _1st){
mcpy(s+_1st, b->data, l - _1st);
incr(b, &b->head, l);
return l;
}
incr(b, &b->head, _1st);
return _1st;
}
/**
* @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)
*/
int RB_readto(ringbuffer *b, uint8_t byte, uint8_t *s, int len){
int idx = RB_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 -RB_read(b, s, len);
return RB_read(b, s, partlen);
}
/**
* @brief RB_write - write some data to ringbuffer
* @param b - buffer
* @param str - data
* @param l - length
* @return amount of bytes written
*/
int RB_write(ringbuffer *b, const uint8_t *str, int l){
int r = b->length - 1 - RB_datalen(b); // rest length
if(l > r) l = r;
if(!l) return 0;
int _1st = b->length - b->tail;
if(_1st > l) _1st = l;
mcpy(b->data + b->tail, str, _1st);
if(_1st < l){ // add another piece from start
mcpy(b->data, str+_1st, l-_1st);
}
incr(b, &b->tail, l);
return l;
}
// just delete all information in buffer `b`
void RB_clearbuf(ringbuffer *b){
b->head = 0;
b->tail = 0;
}

35
F3:F303/NitrogenFlooding/ringbuffer.h Normal file
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/*
* This file is part of the nitrogen 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 <stm32f3.h>
typedef struct{
uint8_t *data; // data buffer
const int length; // its length
int head; // head index
int tail; // tail index
} 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);
void RB_clearbuf(ringbuffer *b);

345
F3:F303/NitrogenFlooding/strfunc.c Normal file
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/*
* This file is part of the nitrogen 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 <math.h>
#include <string.h>
/**
* @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[52], *bptr = buf;
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 % 16 == 15){
*bptr++ = '\n';
*bptr = 0;
sendfun(buf);
bptr = buf;
}else *bptr++ = ' ';
}
if(bptr != buf){
*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 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`
char *u2str(uint32_t val){
return _2str(val, 0);
}
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
*/
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` > ' '
*/
const char *omit_spaces(const char *buf){
while(*buf){
if(*buf > ' ') break;
++buf;
}
return 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)
const 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;
}
/*
void mymemcpy(char *dest, const char *src, int len){
if(len < 1) return;
while(len--) *dest++ = *src++;
}
*/

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/*
* This file is part of the nitrogen 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>
#include <string.h>
void hexdump(int (*sendfun)(const char *s), uint8_t *arr, uint16_t len);
char *u2str(uint32_t val);
char *i2str(int32_t i);
char *uhex2str(uint32_t val);
const char *getnum(const char *txt, uint32_t *N);
const char *omit_spaces(const char *buf);
const char *getint(const char *txt, int32_t *I);
const char *float2str(float x, uint8_t prec);
//void mymemcpy(char *dest, const char *src, int len);

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/*
* This file is part of the nitrogen 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 <string.h>
#include "hardware.h"
#include "ringbuffer.h"
#include "usb.h"
#include "usb_lib.h"
static volatile uint8_t usbbuff[USB_TXBUFSZ]; // temporary buffer for sending data
// ring buffers for incoming and outgoing data
static uint8_t obuf[RBOUTSZ], ibuf[RBINSZ];
static volatile ringbuffer out = {.data = obuf, .length = RBOUTSZ, .head = 0, .tail = 0};
static volatile ringbuffer in = {.data = ibuf, .length = RBINSZ, .head = 0, .tail = 0};
// transmission is succesfull
static volatile uint8_t bufisempty = 1;
static volatile uint8_t bufovrfl = 0;
static void send_next(){
if(bufisempty) return;
static int lastdsz = 0;
int buflen = RB_read((ringbuffer*)&out, (uint8_t*)usbbuff, USB_TXBUFSZ);
if(!buflen){
if(lastdsz == 64) EP_Write(3, NULL, 0); // send ZLP after 64 bits packet when nothing more to send
lastdsz = 0;
bufisempty = 1;
return;
}
EP_Write(3, (uint8_t*)usbbuff, buflen);
lastdsz = buflen;
}
// blocking send full content of ring buffer
int USB_sendall(){
while(!bufisempty){
if(!usbON) return 0;
}
return 1;
}
// put `buf` into queue to send
int USB_send(const uint8_t *buf, int len){
if(!buf || !usbON || !len) return 0;
while(len){
int a = RB_write((ringbuffer*)&out, buf, len);
len -= a;
buf += a;
if(bufisempty){
bufisempty = 0;
send_next();
}
}
return 1;
}
int USB_putbyte(uint8_t byte){
if(!usbON) return 0;
while(0 == RB_write((ringbuffer*)&out, &byte, 1)){
if(bufisempty){
bufisempty = 0;
send_next();
}
}
return 1;
}
int USB_sendstr(const char *string){
if(!string || !usbON) return 0;
int len = 0;
const char *b = string;
while(*b++) ++len;
if(!len) return 0;
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){
int sz = RB_read((ringbuffer*)&in, buf, len);
if(bufovrfl){
RB_clearbuf((ringbuffer*)&in);
if(!sz) sz = -1;
else sz = -sz;
bufovrfl = 0;
}
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){
int l = RB_readto((ringbuffer*)&in, '\n', (uint8_t*)buf, len);
if(l == 0) return 0;
if(--l < 0 || bufovrfl) RB_clearbuf((ringbuffer*)&in);
else buf[l] = 0; // replace '\n' with strend
if(bufovrfl){
if(l > 0) l = -l;
else l = -1;
bufovrfl = 0;
}
return l;
}
// interrupt IN handler (never used?)
static void EP1_Handler(){
uint16_t epstatus = KEEP_DTOG(USB->EPnR[1]);
if(RX_FLAG(epstatus)) epstatus = (epstatus & ~USB_EPnR_STAT_TX) ^ USB_EPnR_STAT_RX; // set valid RX
else epstatus = epstatus & ~(USB_EPnR_STAT_TX|USB_EPnR_STAT_RX);
// clear CTR
epstatus = (epstatus & ~(USB_EPnR_CTR_RX|USB_EPnR_CTR_TX));
USB->EPnR[1] = epstatus;
}
// data IN/OUT handlers
static void transmit_Handler(){ // EP3IN
uint16_t epstatus = KEEP_DTOG_STAT(USB->EPnR[3]);
// clear CTR keep DTOGs & STATs
USB->EPnR[3] = (epstatus & ~(USB_EPnR_CTR_TX)); // clear TX ctr
send_next();
}
static void receive_Handler(){ // EP2OUT
uint8_t buf[USB_RXBUFSZ];
uint16_t epstatus = KEEP_DTOG(USB->EPnR[2]);
uint8_t sz = EP_Read(2, (uint8_t*)buf);
if(sz){
if(RB_write((ringbuffer*)&in, buf, sz) != sz) bufovrfl = 1;
}
// keep stat_tx & set ACK rx, clear RX ctr
USB->EPnR[2] = (epstatus & ~USB_EPnR_CTR_RX) ^ USB_EPnR_STAT_RX;
}
void USB_proc(){
switch(USB_Dev.USB_Status){
case USB_STATE_CONFIGURED:
// make new BULK endpoint
// Buffer have 1024 bytes, but last 256 we use for CAN bus (30.2 of RM: USB main features)
EP_Init(1, EP_TYPE_INTERRUPT, USB_EP1BUFSZ, 0, EP1_Handler); // IN1 - transmit
EP_Init(2, EP_TYPE_BULK, 0, USB_RXBUFSZ, receive_Handler); // OUT2 - receive data
EP_Init(3, EP_TYPE_BULK, USB_TXBUFSZ, 0, transmit_Handler); // IN3 - transmit data
USB_Dev.USB_Status = USB_STATE_CONNECTED;
break;
case USB_STATE_DEFAULT:
case USB_STATE_ADDRESSED:
if(usbON){
usbON = 0;
}
break;
default: // USB_STATE_CONNECTED - send next data portion
// if(!usbON) return; // WTF?
break;
}
}

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/*
* This file is part of the nitrogen 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 "usbhw.h"
// sizes of ringbuffers for outgoing and incoming data
#define RBOUTSZ (512)
#define RBINSZ (512)
#define newline() USB_putbyte('\n')
#define USND(s) do{USB_sendstr(s); USB_putbyte('\n');}while(0)
#define STR_HELPER(s) #s
#define STR(s) STR_HELPER(s)
#ifdef EBUG
#define DBG(str) do{USB_sendstr(__FILE__ " (L" STR(__LINE__) "): " str); newline();}while(0)
#else
#define DBG(str)
#endif
void USB_proc();
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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/*
* This file is part of the nitrogen 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 <stdint.h>
#include "usb_lib.h"
ep_t endpoints[STM32ENDPOINTS];
usb_dev_t USB_Dev;
static usb_LineCoding lineCoding = {115200, 0, 0, 8};
config_pack_t setup_packet;
uint8_t ep0databuf[EP0DATABUF_SIZE];
usb_LineCoding getLineCoding(){return lineCoding;}
volatile uint8_t usbON = 0; // device disconnected from terminal
// definition of parts common for USB_DeviceDescriptor & USB_DeviceQualifierDescriptor
#define bcdUSB_L 0x10
#define bcdUSB_H 0x01
#define bDeviceClass 0
#define bDeviceSubClass 0
#define bDeviceProtocol 0
#define bNumConfigurations 1
static const uint8_t USB_DeviceDescriptor[] = {
18, // bLength
0x01, // bDescriptorType - Device descriptor
bcdUSB_L, // bcdUSB_L - 1.10
bcdUSB_H, // bcdUSB_H
bDeviceClass, // bDeviceClass - USB_COMM
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0_BUFSZ, // bMaxPacketSize
0x7b, // idVendor_L PL2303: VID=0x067b, PID=0x2303
0x06, // idVendor_H
0x03, // idProduct_L
0x23, // idProduct_H
0x00, // bcdDevice_Ver_L
0x03, // bcdDevice_Ver_H
0x01, // iManufacturer
0x02, // iProduct
0x00, // iSerialNumber
bNumConfigurations // bNumConfigurations
};
static const uint8_t USB_DeviceQualifierDescriptor[] = {
10, //bLength
0x06, // bDescriptorType - Device qualifier
bcdUSB_L, // bcdUSB_L
bcdUSB_H, // bcdUSB_H
bDeviceClass, // bDeviceClass
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0_BUFSZ, // bMaxPacketSize0
bNumConfigurations, // bNumConfigurations
0x00 // Reserved
};
static const uint8_t USB_ConfigDescriptor[] = {
/*Configuration Descriptor*/
0x09, /* bLength: Configuration Descriptor size */
0x02, /* bDescriptorType: Configuration */
39, /* wTotalLength:no of returned bytes */
0x00,
0x01, /* bNumInterfaces: 1 interface */
0x01, /* bConfigurationValue: Configuration value */
0x00, /* iConfiguration: Index of string descriptor describing the configuration */
0xa0, /* bmAttributes - Bus powered, Remote wakeup */
0x32, /* MaxPower 100 mA */
/*---------------------------------------------------------------------------*/
/*Interface Descriptor */
0x09, /* bLength: Interface Descriptor size */
0x04, /* bDescriptorType: Interface */
0x00, /* bInterfaceNumber: Number of Interface */
0x00, /* bAlternateSetting: Alternate setting */
0x03, /* bNumEndpoints: 3 endpoints used */
0xff, /* bInterfaceClass */
0x00, /* bInterfaceSubClass */
0x00, /* bInterfaceProtocol */
0x00, /* iInterface: */
///////////////////////////////////////////////////
/*Endpoint 1 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x81, /* bEndpointAddress IN1 */
0x03, /* bmAttributes: Interrupt */
0x0a, /* wMaxPacketSize LO: */
0x00, /* wMaxPacketSize HI: */
0x01, /* bInterval: */
/*Endpoint OUT2 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x02, /* bEndpointAddress: OUT2 */
0x02, /* bmAttributes: Bulk */
(USB_RXBUFSZ & 0xff), /* wMaxPacketSize: 64 */
(USB_RXBUFSZ >> 8),
0x00, /* bInterval: ignore for Bulk transfer */
/*Endpoint IN3 Descriptor*/
0x07, /* bLength: Endpoint Descriptor size */
0x05, /* bDescriptorType: Endpoint */
0x83, /* bEndpointAddress IN3 */
0x02, /* bmAttributes: Bulk */
(USB_TXBUFSZ & 0xff), /* wMaxPacketSize: 64 */
(USB_TXBUFSZ >> 8),
0x00, /* bInterval: ignore for Bulk transfer */
};
_USB_LANG_ID_(USB_StringLangDescriptor, LANG_US);
// these descriptors are not used in PL2303 emulator!
_USB_STRING_(USB_StringSerialDescriptor, u"0");
_USB_STRING_(USB_StringManufacturingDescriptor, u"Prolific Technology Inc.");
_USB_STRING_(USB_StringProdDescriptor, u"USB-Serial Controller");
/*
* default handlers
*/
// SET_LINE_CODING
void WEAK linecoding_handler(usb_LineCoding __attribute__((unused)) *lc){
}
// SET_CONTROL_LINE_STATE
void WEAK clstate_handler(uint16_t __attribute__((unused)) val){
}
// SEND_BREAK
void WEAK break_handler(){
}
// handler of vendor requests
void WEAK vendor_handler(config_pack_t *packet){
uint16_t c;
if(packet->bmRequestType & 0x80){ // read
switch(packet->wValue){
case 0x8484:
c = 2;
break;
case 0x0080:
c = 1;
break;
case 0x8686:
c = 0xaa;
break;
default:
c = 0;
}
EP_WriteIRQ(0, (uint8_t*)&c, 1);
}else{ // write ZLP
c = 0;
EP_WriteIRQ(0, (uint8_t *)&c, 0);
}
}
static void wr0(const uint8_t *buf, uint16_t size){
if(setup_packet.wLength < size) size = setup_packet.wLength; // shortened request
if(size < endpoints[0].txbufsz){
EP_WriteIRQ(0, buf, size);
return;
}
while(size){
uint16_t l = size;
if(l > endpoints[0].txbufsz) l = endpoints[0].txbufsz;
EP_WriteIRQ(0, buf, l);
buf += l;
size -= l;
uint8_t needzlp = (l == endpoints[0].txbufsz) ? 1 : 0;
if(size || needzlp){ // send last data buffer
uint16_t status = KEEP_DTOG(USB->EPnR[0]);
// keep DTOGs, clear CTR_RX,TX, set TX VALID, leave stat_Rx
USB->EPnR[0] = (status & ~(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, (uint8_t*)0, 0);
}
}
}
static inline void get_descriptor(){
switch(setup_packet.wValue){
case DEVICE_DESCRIPTOR:
wr0(USB_DeviceDescriptor, sizeof(USB_DeviceDescriptor));
break;
case CONFIGURATION_DESCRIPTOR:
wr0(USB_ConfigDescriptor, sizeof(USB_ConfigDescriptor));
break;
case STRING_LANG_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringLangDescriptor, STRING_LANG_DESCRIPTOR_SIZE_BYTE);
break;
case STRING_MAN_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringManufacturingDescriptor, USB_StringManufacturingDescriptor.bLength);
break;
case STRING_PROD_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringProdDescriptor, USB_StringProdDescriptor.bLength);
break;
case STRING_SN_DESCRIPTOR:
wr0((const uint8_t *)&USB_StringSerialDescriptor, USB_StringSerialDescriptor.bLength);
break;
case DEVICE_QUALIFIER_DESCRIPTOR:
wr0(USB_DeviceQualifierDescriptor, USB_DeviceQualifierDescriptor[0]);
break;
default:
break;
}
}
static uint16_t configuration = 0; // reply for GET_CONFIGURATION (==1 if configured)
static inline void std_d2h_req(){
uint16_t status = 0; // bus powered
switch(setup_packet.bRequest){
case GET_DESCRIPTOR:
get_descriptor();
break;
case GET_STATUS:
EP_WriteIRQ(0, (uint8_t *)&status, 2); // send status: Bus Powered
break;
case GET_CONFIGURATION:
EP_WriteIRQ(0, (uint8_t*)&configuration, 1);
break;
default:
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_Dev.USB_Addr = setup_packet.wValue;
break;
case SET_CONFIGURATION:
// Now device configured
USB_Dev.USB_Status = USB_STATE_CONFIGURED;
configuration = setup_packet.wValue;
break;
default:
break;
}
}
/*
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
*/
void EP0_Handler(){
uint16_t epstatus = USB->EPnR[0]; // EP0R on input -> return this value after modifications
uint8_t reqtype = setup_packet.bmRequestType & 0x7f;
uint8_t dev2host = (setup_packet.bmRequestType & 0x80) ? 1 : 0;
int rxflag = RX_FLAG(epstatus);
if(rxflag && SETUP_FLAG(epstatus)){
switch(reqtype){
case STANDARD_DEVICE_REQUEST_TYPE: // standard device request
if(dev2host){
std_d2h_req();
}else{
std_h2d_req();
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
break;
case STANDARD_ENDPOINT_REQUEST_TYPE: // standard endpoint request
if(setup_packet.bRequest == CLEAR_FEATURE){
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
break;
case VENDOR_REQUEST_TYPE:
vendor_handler(&setup_packet);
break;
case CONTROL_REQUEST_TYPE:
switch(setup_packet.bRequest){
case GET_LINE_CODING:
EP_WriteIRQ(0, (uint8_t*)&lineCoding, sizeof(lineCoding));
break;
case SET_LINE_CODING: // omit this for next stage, when data will come
break;
case SET_CONTROL_LINE_STATE:
usbON = 1;
clstate_handler(setup_packet.wValue);
break;
case SEND_BREAK:
usbON = 0;
break_handler();
break;
default:
break;
}
if(setup_packet.bRequest != GET_LINE_CODING) EP_WriteIRQ(0, (uint8_t *)0, 0); // write acknowledgement
break;
default:
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
}else if(rxflag){ // got data over EP0 or host acknowlegement
if(endpoints[0].rx_cnt){
if(setup_packet.bRequest == SET_LINE_CODING){
linecoding_handler((usb_LineCoding*)ep0databuf);
}
}
} else if(TX_FLAG(epstatus)){ // package transmitted
// now we can change address after enumeration
if ((USB->DADDR & USB_DADDR_ADD) != USB_Dev.USB_Addr){
USB->DADDR = USB_DADDR_EF | USB_Dev.USB_Addr;
// change state to ADRESSED
USB_Dev.USB_Status = USB_STATE_ADDRESSED;
}
}
epstatus = KEEP_DTOG(USB->EPnR[0]);
if(rxflag) epstatus ^= USB_EPnR_STAT_TX; // start ZLP/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 memcpy 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 status = KEEP_DTOG(USB->EPnR[number]);
// keep DTOGs, clear CTR_TX & set TX VALID to start transmission
USB->EPnR[number] = (status & ~(USB_EPnR_CTR_TX)) ^ 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 memcpy 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;
}

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/*
* This file is part of the nitrogen 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 <wchar.h>
#include "usbhw.h"
#define EP0DATABUF_SIZE (64)
#define LASTADDR_DEFAULT (STM32ENDPOINTS * 8)
// bmRequestType & 0x7f
#define STANDARD_DEVICE_REQUEST_TYPE 0
#define STANDARD_ENDPOINT_REQUEST_TYPE 2
#define VENDOR_REQUEST_TYPE 0x40
#define CONTROL_REQUEST_TYPE 0x21
// bRequest, standard; for bmRequestType == 0x80
#define GET_STATUS 0x00
#define GET_DESCRIPTOR 0x06
#define GET_CONFIGURATION 0x08
// for bmRequestType == 0
#define CLEAR_FEATURE 0x01
#define SET_FEATURE 0x03 // unused
#define SET_ADDRESS 0x05
#define SET_DESCRIPTOR 0x07 // unused
#define SET_CONFIGURATION 0x09
// for bmRequestType == 0x81, 1 or 0xB2
#define GET_INTERFACE 0x0A // unused
#define SET_INTERFACE 0x0B // unused
#define SYNC_FRAME 0x0C // unused
#define VENDOR_REQUEST 0x01 // unused
// 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
// wValue
#define DEVICE_DESCRIPTOR 0x100
#define CONFIGURATION_DESCRIPTOR 0x200
#define STRING_LANG_DESCRIPTOR 0x300
#define STRING_MAN_DESCRIPTOR 0x301
#define STRING_PROD_DESCRIPTOR 0x302
#define STRING_SN_DESCRIPTOR 0x303
#define DEVICE_QUALIFIER_DESCRIPTOR 0x600
#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))
// USB state: uninitialized, addressed, ready for use
typedef enum{
USB_STATE_DEFAULT,
USB_STATE_ADDRESSED,
USB_STATE_CONFIGURED,
USB_STATE_CONNECTED
} USB_state;
// EP types
#define EP_TYPE_BULK 0x00
#define EP_TYPE_CONTROL 0x01
#define EP_TYPE_ISO 0x02
#define EP_TYPE_INTERRUPT 0x03
#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}
#define STRING_LANG_DESCRIPTOR_SIZE_BYTE (4)
// 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;
// USB status & its address
typedef struct {
uint8_t USB_Status;
uint16_t USB_Addr;
}usb_dev_t;
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;
typedef struct {
uint8_t bmRequestType;
uint8_t bNotificationType;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} __attribute__ ((packed)) usb_cdc_notification;
extern ep_t endpoints[];
extern usb_dev_t USB_Dev;
extern volatile uint8_t usbON;
extern config_pack_t setup_packet;
extern uint8_t ep0databuf[];
void EP0_Handler();
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);
usb_LineCoding getLineCoding();
void linecoding_handler(usb_LineCoding *lc);
void clstate_handler(uint16_t val);
void break_handler();
void vendor_handler(config_pack_t *packet);

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/*
* This file is part of the nitrogen 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 "usb.h"
#include "usb_lib.h"
// here we suppose that all PIN settings done in hw_setup earlier
void USB_setup(){
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;
RCC->APB1ENR |= RCC_APB1ENR_USBEN;
USB->CNTR = USB_CNTR_FRES; // Force USB Reset
for(uint32_t ctr = 0; ctr < 72000; ++ctr) nop(); // wait >1ms
//uint32_t ctr = 0;
USB->CNTR = 0;
USB->BTABLE = 0;
USB->DADDR = 0;
USB->ISTR = 0;
USB->CNTR = USB_CNTR_RESETM | USB_CNTR_WKUPM; // allow only wakeup & reset interrupts
NVIC_EnableIRQ(USB_LP_IRQn);
}
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 || rxsz > USB_BTABLE_SIZE) return 1; // buffer too large
if(lastaddr + txsz + rxsz >= USB_BTABLE_SIZE) 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 || rxsz > 512) 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_lp_isr(){
if(USB->ISTR & USB_ISTR_RESET){
usbON = 0;
// Reinit registers
USB->CNTR = USB_CNTR_RESETM | USB_CNTR_CTRM | USB_CNTR_SUSPM | USB_CNTR_WKUPM;
// 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_Dev.USB_Status = USB_STATE_DEFAULT;
if(EP_Init(0, EP_TYPE_CONTROL, USB_EP0_BUFSZ, USB_EP0_BUFSZ, EP0_Handler)){
return;
}
USB->ISTR = ~USB_ISTR_RESET;
}
if(USB->ISTR & USB_ISTR_CTR){
// EP number
uint8_t n = USB->ISTR & USB_ISTR_EPID;
// copy status register
uint16_t epstatus = USB->EPnR[n];
// copy received bytes amount
endpoints[n].rx_cnt = USB_BTABLE->EP[n].USB_COUNT_RX & 0x3FF; // low 10 bits is counter
// 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(n == 0){ // control endpoint
if(epstatus & USB_EPnR_SETUP){ // setup packet -> copy data to conf_pack
EP_Read(0, (uint8_t*)&setup_packet);
// interrupt handler will be called later
}else if(epstatus & USB_EPnR_CTR_RX){ // data packet -> push received data to ep0databuf
EP_Read(0, (uint8_t*)&ep0databuf);
}
}
}
// call EP handler
if(endpoints[n].func) endpoints[n].func(endpoints[n]);
}
if(USB->ISTR & USB_ISTR_SUSP){ // suspend -> still no connection, may sleep
usbON = 0;
USB->CNTR |= USB_CNTR_FSUSP | USB_CNTR_LP_MODE;
USB->ISTR = ~USB_ISTR_SUSP;
}
if(USB->ISTR & USB_ISTR_WKUP){ // wakeup
USB->CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LP_MODE); // clear suspend flags
USB->ISTR = ~USB_ISTR_WKUP;
}
}

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/*
* This file is part of the nitrogen 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 <stm32f3.h>
// max endpoints number
#define STM32ENDPOINTS 8
/**
* Buffers size definition
**/
#define USB_BTABLE_SIZE 768
// first 64 bytes of USB_BTABLE are registers!
//#define USB_EP0_BASEADDR 64
// for USB FS EP0 buffers are from 8 to 64 bytes long (64 for PL2303)
#define USB_EP0_BUFSZ 64
// USB transmit buffer size (64 for PL2303)
#define USB_TXBUFSZ 64
// USB receive buffer size (64 for PL2303)
#define USB_RXBUFSZ 64
// EP1 - interrupt - buffer size
#define USB_EP1BUFSZ 8
#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;
} 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;
void USB_setup();
int EP_Init(uint8_t number, uint8_t type, uint16_t txsz, uint16_t rxsz, void (*func)());

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#define BUILD_NUMBER "1"
#define BUILD_DATE "2023-03-20"

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F3:F303/inc/Fx/stm32f3.h
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#include "vector.h"
#if defined STM32F303xb || defined STM32F303xc
#include "stm32f303xc.h"
#elif defined STM32F302xb || defined STM32F302xc
#include "stm32f302xc.h"
#elif defined STM32F303xd || defined STM32F303xe
#include "stm32f303xe.h"
#else

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F3:F303/inc/ld/stm32f302xB.ld Normal file
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MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 128K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 40K
}
PROVIDE(_BLOCKSIZE = 2048);
/* Include the common ld script. */
INCLUDE stm32f3.ld