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started to write common USB code for pl2303, CDC, HID and composite device

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This commit is contained in:
Edward Emelianov 2024-11-30 23:29:26 +03:00
parent cd17777c4d
commit d8284ea725
22 changed files with 1371 additions and 0 deletions
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4
F0:F030,F042,F072/inc/Fx/common_macros.h
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#include <stdint.h> #include <stdint.h>
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#ifndef TRUE #ifndef TRUE
#define TRUE 1 #define TRUE 1
#endif #endif

9
F1:F103/USB_NEW_concept/Makefile Normal file
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BINARY := someusb
# MCU code
MCU ?= F103x6
# change this linking script depending on particular MCU model,
LDSCRIPT ?= stm32f103x6.ld
DEFINES := -DSTM32F10X_LD
include ../makefile.f1
include ../../makefile.stm32

50
F1:F103/USB_NEW_concept/hardware.c Normal file
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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 "hardware.h"
static inline void gpio_setup(){
// Enable clocks to the GPIO subsystems (PB for ADC), turn on AFIO clocking to disable SWD/JTAG
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_AFIOEN;
// turn off SWJ/JTAG
// AFIO->MAPR = AFIO_MAPR_SWJ_CFG_DISABLE;
AFIO->MAPR = AFIO_MAPR_SWJ_CFG_JTAGDISABLE; // for PA15
// Set led as opendrain output
GPIOC->CRH |= CRH(13, CNF_ODOUTPUT|MODE_SLOW);
// USB pullup (PA15) - pushpull output
GPIOA->CRH = CRH(15, CNF_PPOUTPUT|MODE_SLOW);
}
void hw_setup(){
gpio_setup();
}
#ifndef EBUG
void iwdg_setup(){
uint32_t tmout = 16000000;
RCC->CSR |= RCC_CSR_LSION;
while((RCC->CSR & RCC_CSR_LSIRDY) != RCC_CSR_LSIRDY){if(--tmout == 0) break;} /* (2) */
IWDG->KR = IWDG_START;
IWDG->KR = IWDG_WRITE_ACCESS;
IWDG->PR = IWDG_PR_PR_1;
IWDG->RLR = 1250;
tmout = 16000000;
while(IWDG->SR){if(--tmout == 0) break;}
IWDG->KR = IWDG_REFRESH;
}
#endif

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F1:F103/USB_NEW_concept/hardware.h Normal file
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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 "stm32f1.h"
// LED0 - PC13 (bluepill), blinking each second
#define LED0_port GPIOC
#define LED0_pin (1<<13)
// USB pullup (not present in bluepill, should be soldered) - PA15
#define USBPU_port GPIOA
#define USBPU_pin (1<<15)
#define USBPU_ON() pin_set(USBPU_port, USBPU_pin)
#define USBPU_OFF() pin_clear(USBPU_port, USBPU_pin)
#define LED_blink(x) pin_toggle(x ## _port, x ## _pin)
#define LED_on(x) pin_clear(x ## _port, x ## _pin)
#define LED_off(x) pin_set(x ## _port, x ## _pin)
void hw_setup();
void iwdg_setup();

53
F1:F103/USB_NEW_concept/main.c Normal file
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/*
* This file is part of the I2Cscan project.
* Copyright 2020 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 "usb_lib.h"
#include "usb_dev.h"
volatile uint32_t Tms = 0;
/* Called when systick fires */
void sys_tick_handler(void){
++Tms;
}
#define STRLEN (256)
int main(void){
uint32_t lastT = 0;
StartHSE();
hw_setup();
USBPU_OFF();
SysTick_Config(72000);
USB_setup();
i2c_setup();
#ifndef EBUG
iwdg_setup();
#endif
USBPU_ON();
while (1){
IWDG->KR = IWDG_REFRESH; // refresh watchdog
if(lastT > Tms || Tms - lastT > 499){
LED_blink(LED0);
lastT = Tms;
}
}
return 0;
}

1
F1:F103/USB_NEW_concept/someusb.cflags Normal file
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-std=c17

4
F1:F103/USB_NEW_concept/someusb.config Normal file
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#define EBUG
#define STM32F1
#define STM32F103x6
#define STM32F10X_LD

1
F1:F103/USB_NEW_concept/someusb.creator Normal file
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[General]

183
F1:F103/USB_NEW_concept/someusb.creator.user Normal file
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1
F1:F103/USB_NEW_concept/someusb.cxxflags Normal file
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-std=c++17

9
F1:F103/USB_NEW_concept/someusb.files Normal file
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hardware.c
hardware.h
main.c
usb_descr.c
usb_descr.h
usb_lib.c
usb_lib.h
usb_dev.c
usb_dev.h

6
F1:F103/USB_NEW_concept/someusb.includes Normal file
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.
../inc
../inc/Fx
../inc/cm
../inc/ld
../inc/startup

110
F1:F103/USB_NEW_concept/usb_descr.c Normal file
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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"
#include "usb_lib.h"
// string descriptors
enum{
iLANGUAGE_DESCR,
iMANUFACTURER_DESCR,
iPRODUCT_DESCR,
iSERIAL_DESCR,
iINTERFACE_DESCR1,
iINTERFACE_DESCR2,
iINTERFACE_DESCR3,
iINTERFACE_DESCR4,
iINTERFACE_DESCR5,
iINTERFACE_DESCR6,
iINTERFACE_DESCR7,
iDESCR_AMOUNT
};
const uint8_t USB_DeviceDescriptor[] = {
USB_DT_DEVICE_SIZE, // bLength
USB_DT_DEVICE, // bDescriptorType
L16(bcdUSB), // bcdUSB_L
H16(bcdUSB), // bcdUSB_H
USB_CLASS_VENDOR_SPEC, // bDeviceClass
bDeviceSubClass, // bDeviceSubClass
bDeviceProtocol, // bDeviceProtocol
USB_EP0BUFSZ, // bMaxPacketSize
L(idVendor), // idVendor_L
H(idVendor), // idVendor_H
L(idProduct), // idProduct_L
H(idProduct), // idProduct_H
L(bcdDevice_Ver), // bcdDevice_Ver_L
H(bcdDevice_Ver), // bcdDevice_Ver_H
iMANUFACTURER_DESCR, // iManufacturer - indexes of string descriptors in array
iPRODUCT_DESCR, // iProduct
iSERIAL_DESCR, // iSerial
bNumConfigurations // bNumConfigurations
};
const uint8_t USB_DeviceQualifierDescriptor[] = {
USB_DT_QUALIFIER_SIZE, //bLength
USB_DT_QUALIFIER, // bDescriptorType
L16(bcdUSB), // bcdUSB_L
H16(bcdUSB), // bcdUSB_H
USB_CLASS_VENDOR_SPEC, // 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))
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 */
100, /* MaxPower in 2mA units */
/*---------------------------------------------------------------------------*/
/*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: only 1 used */
0, /* bInterfaceClass */
0, /* bInterfaceSubClass */
0, /* bInterfaceProtocol */
iINTERFACE_DESCR1, /* iInterface: */
};
_USB_LANG_ID_(LD, LANG_US);
_USB_STRING_(SD, u"0.0.1");
_USB_STRING_(MD, u"eddy@sao");
_USB_STRING_(PD, u"Some USB device");
_USB_STRING_(ID, u"first interface");
const uint8_t* const StringDescriptor[iDESCR_AMOUNT] = {
[iLANGUAGE_DESCR] = &LD,
[iMANUFACTURER_DESCR] = &MD,
[iPRODUCT_DESCR] = &PD,
[iSERIAL_DESCR] = &SD,
[iINTERFACE_DESCR1] = &ID
};

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F1:F103/USB_NEW_concept/usb_descr.h Normal file
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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>
// definition of parts common for USB_DeviceDescriptor & USB_DeviceQualifierDescriptor
// bcdUSB: 1.10
#define bcdUSB 0x0110
#define bDeviceSubClass 0x00
#define bDeviceProtocol 0x00
#define idVendor 0x0403
#define idProduct 0xc631
#define bcdDevice_Ver 0x0205
#define bNumConfigurations 1
// low/high for uint16_t
#define L16(x) (x & 0xff)
#define H16(x) (x >> 8)
// amount of interfaces and endpoints (except 0) used
#define bNumInterfaces 1
#define bTotNumEndpoints 1
// powered
#define BusPowered (1<<7)
#define SelfPowered (1<<6)
#define RemoteWakeup (1<<5)
extern const uint8_t USB_DeviceDescriptor[];
extern const uint8_t USB_DeviceQualifierDescriptor[];
extern const uint8_t USB_ConfigDescriptor[];

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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 <stm32f1.h>
#include <string.h>
#include "usb_dev.h"
static void EP1_Handler(){
}
void set_configuration(uint16_t _U_ configuration){
}
void usb_class_request(config_pack_t *req, uint8_t *data, unsigned int datalen){
uint8_t buf[USB_EP0BUFSZ];
size_t len = 0;
//uint8_t recipient = REQUEST_RECIPIENT(req->bmRequestType);
if((req->bmRequestType & 0x80) == 0){ // OUT - setters
switch(req->bRequest){
case CMD_I2C_IO:
case CMD_I2C_IO | CMD_I2C_BEGIN:
case CMD_I2C_IO | CMD_I2C_END:
case CMD_I2C_IO | CMD_I2C_BEGIN | CMD_I2C_END: // write
if(req->wValue & I2C_M_RD) break; // OUT - only write
if(!data) break; // wait for data
len = datalen;
usb_i2c_io(req, data, &len);
break;
default:
break;
}
EP_WriteIRQ(0, 0, 0);
return;
}
switch(req->bRequest){
case CMD_ECHO:
memcpy(buf, &req->wValue, sizeof(req->wValue));
len = sizeof(req->wValue);
break;
case CMD_GET_FUNC:
/* Report our capabilities */
bzero(buf, req->wLength);
memcpy(buf, &func, sizeof(func));
len = req->wLength;
break;
case CMD_I2C_IO:
case CMD_I2C_IO | CMD_I2C_BEGIN:
case CMD_I2C_IO | CMD_I2C_END:
case CMD_I2C_IO | CMD_I2C_BEGIN | CMD_I2C_END: // read
if(req->wValue & I2C_M_RD){ // IN - only read
len = req->wLength;
usb_i2c_io(req, buf, &len);
}
break;
case CMD_GET_STATUS:
memcpy(buf, &status, sizeof(status));
len = sizeof(status);
break;
default:
break;
}
EP_WriteIRQ(0, buf, len); // write ZLP if nothing received
}
void usb_vendor_request(config_pack_t *req, uint8_t *data, unsigned int datalen) __attribute__ ((alias ("usb_class_request")));

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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 <stm32f1.h>
#include "usb_lib.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/>.
*/
#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 ep0databuf[EP0DATABUF_SIZE], setupdatabuf[EP0DATABUF_SIZE];
static uint8_t ep0dbuflen = 0;
static config_pack_t *setup_packet = (config_pack_t*) setupdatabuf;
volatile uint8_t usbON = 0; // device is configured and active
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 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, (uint8_t*)0, 0);
}
}
}
static inline void get_descriptor(){
uint8_t descrtype = setup_packet->wValue >> 8,
descridx = setup_packet->wValue & 0xff;
switch(descrtype){
case DEVICE_DESCRIPTOR:
wr0(USB_DeviceDescriptor, sizeof(USB_DeviceDescriptor));
break;
case CONFIGURATION_DESCRIPTOR:
wr0(USB_ConfigDescriptor, sizeof(USB_ConfigDescriptor));
break;
case STRING_DESCRIPTOR:
if(descridx < iDESCR_AMOUNT) wr0((const uint8_t *)StringDescriptor[descridx], *((uint8_t*)StringDescriptor[descridx]));
else EP_WriteIRQ(0, (uint8_t*)0, 0);
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 st = 0;
switch(setup_packet->bRequest){
case GET_DESCRIPTOR:
get_descriptor();
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:
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(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();
return;
}else{
std_h2d_req();
EP_WriteIRQ(0, (uint8_t *)0, 0);
}
break;
case REQ_RECIPIENT_INTERFACE:
//EP_WriteIRQ(0, (const uint8_t*)"epi", 4);
break;
case REQ_RECIPIENT_ENDPOINT:
if(setup_packet->bRequest == CLEAR_FEATURE){
EP_WriteIRQ(0, (uint8_t *)0, 0);
}else{
//EP_WriteIRQ(0, (const uint8_t*)"epr", 4);
}
break;
default:
//EP_WriteIRQ(0, (const uint8_t*)"epd", 4);
break;
}
}
void WEAK usb_class_request(config_pack_t _U_ *req, uint8_t _U_ *data, unsigned int _U_ datalen){
EP_WriteIRQ(0, (const uint8_t*)"cls", 4);
}
void WEAK usb_vendor_request(config_pack_t _U_ *packet, uint8_t _U_ *data, unsigned int _U_ datalen){
EP_WriteIRQ(0, (const uint8_t*)"vnd", 4);
}
/*
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(){
uint16_t epstatus = USB->EPnR[0]; // EP0R on input -> return this value after modifications
uint8_t reqtype = REQUEST_TYPE(setup_packet->bmRequestType);
//char x[] = "EP0Hx";
int rxflag = RX_FLAG(epstatus);
if(rxflag && SETUP_FLAG(epstatus)){
switch(reqtype){
case REQ_TYPE_STANDARD:
usb_standard_request();
break;
case REQ_TYPE_CLASS:
usb_class_request(setup_packet, NULL, 0);
break;
case REQ_TYPE_VENDOR:
usb_vendor_request(setup_packet, NULL, 0);
break;
default:
//x[4] = reqtype;
//EP_WriteIRQ(0, (const uint8_t*)x, 5);
break;
}
}else if(rxflag){ // got data over EP0 or host acknowlegement
if(ep0dbuflen){
switch(reqtype){
case REQ_TYPE_CLASS:
usb_class_request(setup_packet, ep0databuf, ep0dbuflen);
break;
case REQ_TYPE_VENDOR:
usb_vendor_request(setup_packet, ep0databuf, ep0dbuflen);
break;
}
ep0dbuflen = 0;
}
}else if(TX_FLAG(epstatus)){ // package transmitted
// 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/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 epstatus = KEEP_DTOG(USB->EPnR[number]);
// keep DTOGs, clear CTR_TX & set TX VALID to start transmission
USB->EPnR[number] = (epstatus & ~(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;
}
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/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 || rxsz > USB_BTABLE_SIZE) 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(){
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;
if(EP_Init(0, EP_TYPE_CONTROL, USB_EP0BUFSZ, USB_EP0BUFSZ, 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, setupdatabuf);
// interrupt handler will be called later
}else if(epstatus & USB_EPnR_CTR_RX){ // data packet -> push received data to ep0databuf
ep0dbuflen = EP_Read(0, 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;
#ifndef STM32F0
USB->CNTR |= USB_CNTR_FSUSP | USB_CNTR_LP_MODE;
#else
USB->CNTR |= USB_CNTR_FSUSP | USB_CNTR_LPMODE;
#endif
USB->ISTR = ~USB_ISTR_SUSP;
}
if(USB->ISTR & USB_ISTR_WKUP){ // wakeup
#ifndef STM32F0
USB->CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LP_MODE); // clear suspend flags
#else
USB->CNTR &= ~(USB_CNTR_FSUSP | USB_CNTR_LPMODE);
#endif
USB->ISTR = ~USB_ISTR_WKUP;
}
}
// 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 | USB_CNTR_WKUPM; // allow only wakeup & 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>
/******************************************************************
* 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 512
#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 512
#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!
// for USB FS EP0 buffers are from 8 to 64 bytes long
#define USB_EP0BUFSZ 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;
#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_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_HID 0x21
#define USB_DT_REPORT 0x22
#define USB_DT_PHYSICAL 0x23
#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_ENDPOINT_SIZE 7
#define USB_DT_QUALIFIER_SIZE 10
// 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
// deprecated defines:
#define STANDARD_DEVICE_REQUEST_TYPE 0
#define STANDARD_INTERFACE_REQUEST_TYPE 1
#define STANDARD_ENDPOINT_REQUEST_TYPE 2
#define STANDARD_OTHER_REQUEST_TYPE 3
#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
#define SET_ADDRESS 0x05
#define SET_DESCRIPTOR 0x07
#define SET_CONFIGURATION 0x09
// for bmRequestType == 0x81, 1 or 0xB2
#define GET_INTERFACE 0x0A
#define SET_INTERFACE 0x0B
#define SYNC_FRAME 0x0C
#define VENDOR_REQUEST 0x01
// Types of descriptors
#define DEVICE_DESCRIPTOR 0x01
#define CONFIGURATION_DESCRIPTOR 0x02
#define STRING_DESCRIPTOR 0x03
#define DEVICE_QUALIFIER_DESCRIPTOR 0x06
// EP types
#define EP_TYPE_BULK 0x00
#define EP_TYPE_CONTROL 0x01
#define EP_TYPE_ISO 0x02
#define EP_TYPE_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, unsigned int datalen);
extern void usb_vendor_request(config_pack_t *packet, uint8_t *data, unsigned int datalen);
extern void set_configuration(uint16_t configuration);

4
F1:F103/inc/Fx/common_macros.h
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@ -24,6 +24,10 @@
#include <stdint.h> #include <stdint.h>
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#ifndef TRUE #ifndef TRUE
#define TRUE 1 #define TRUE 1
#endif #endif

4
F3:F303/inc/Fx/common_macros.h
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@ -24,6 +24,10 @@
#include <stdint.h> #include <stdint.h>
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#ifndef TRUE #ifndef TRUE
#define TRUE 1 #define TRUE 1
#endif #endif

4
F4:F401/inc/Fx/common_macros.h
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@ -24,6 +24,10 @@
#include <stdint.h> #include <stdint.h>
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#ifndef TRUE #ifndef TRUE
#define TRUE 1 #define TRUE 1
#endif #endif

4
G0:G070/inc/Fx/common_macros.h
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@ -24,6 +24,10 @@
#include <stdint.h> #include <stdint.h>
#ifndef _U_
#define _U_ __attribute__((__unused__))
#endif
#ifndef TRUE #ifndef TRUE
#define TRUE 1 #define TRUE 1
#endif #endif