mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 10:45:11 +03:00
add eeprom flash emulation for G0
This commit is contained in:
Edward Emelianov
parent
2cc06884b4
commit
87d9bc17c7
9
G0:G070/flash/Makefile
Normal file
9
G0:G070/flash/Makefile
Normal file
@ -0,0 +1,9 @@
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BINARY := flash
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# MCU code
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MCU := G070xx
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# change this linking script depending on particular MCU model,
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LDSCRIPT := stm32g070xb.ld
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include ../makefile.g0
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include ../../makefile.stm32
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2
G0:G070/flash/README
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2
G0:G070/flash/README
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@ -0,0 +1,2 @@
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USART3 @ PD8/PD9 (115200, 8N1)
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EEPROM in Flash emulation
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BIN
G0:G070/flash/flash.bin
Executable file
BIN
G0:G070/flash/flash.bin
Executable file
Binary file not shown.
198
G0:G070/flash/flash.c
Normal file
198
G0:G070/flash/flash.c
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@ -0,0 +1,198 @@
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/*
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* This file is part of the flash project.
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* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stm32g0.h>
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#include <string.h> // memcpy
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#include "flash.h"
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#include "strfunc.h"
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#include "usart.h"
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extern const uint32_t __varsstart, _BLOCKSIZE;
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static const uint32_t blocksize = (uint32_t)&_BLOCKSIZE;
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// max amount of Config records stored (will be recalculate in flashstorage_init()
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static uint32_t maxCnum = 1024 / sizeof(user_conf); // can't use blocksize here
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#define DEFMF {.haveencoder = 1, .donthold = 1, .eswinv = 1, .keeppos = 1}
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#define USERCONF_INITIALIZER { \
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.userconf_sz = sizeof(user_conf) \
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,.flagU16 = 0xabcd \
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,.flagU32 = 0xdeadbeef \
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,.str = "test string" \
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}
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static int erase_flash(const void*, const void*);
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static int write2flash(const void*, const void*, uint32_t);
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// don't write `static` here, or get error:
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// 'memcpy' forming offset 8 is out of the bounds [0, 4] of object '__varsstart' with type 'uint32_t'
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const user_conf *Flash_Data = (const user_conf *)(&__varsstart);
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user_conf the_conf = USERCONF_INITIALIZER;
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static int currentconfidx = -1; // index of current configuration
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/**
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* @brief binarySearch - binary search in flash for last non-empty cell
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* any struct searched should have its sizeof() @ the first field!!!
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* @param l - left index
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* @param r - right index (should be @1 less than last index!)
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* @param start - starting address
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* @param stor_size - size of structure to search
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* @return index of non-empty cell or -1
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*/
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static int binarySearch(int r, const uint8_t *start, int stor_size){
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int l = 0;
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while(r >= l){
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int mid = l + (r - l) / 2;
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const uint8_t *s = start + mid * stor_size;
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if(*((const uint16_t*)s) == stor_size){
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if(*((const uint16_t*)(s + stor_size)) == 0xffff){ // next is free
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return mid;
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}else{ // element is to the right
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l = mid + 1;
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}
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}else{ // element is to the left
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r = mid - 1;
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}
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}
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return -1; // not found
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}
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/**
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* @brief flashstorage_init - initialization of user conf storage
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* run in once @ start
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*/
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void flashstorage_init(){
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if(FLASH_SIZE > 0 && FLASH_SIZE < 20000){
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uint32_t flsz = FLASH_SIZE * blocksize; // size in bytes
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flsz -= (uint32_t)(&__varsstart) - FLASH_BASE;
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maxCnum = flsz / sizeof(user_conf);
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}
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// -1 if there's no data at all & flash is clear; maxnum-1 if flash is full
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currentconfidx = binarySearch((int)maxCnum-2, (const uint8_t*)Flash_Data, sizeof(user_conf));
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if(currentconfidx > -1){
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memcpy(&the_conf, &Flash_Data[currentconfidx], sizeof(user_conf));
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}
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}
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// store new configuration
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// @return 0 if all OK
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int store_userconf(){
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// maxnum - 3 means that there always should be at least one empty record after last data
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// for binarySearch() checking that there's nothing more after it!
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if(currentconfidx > (int)maxCnum - 3){ // there's no more place
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currentconfidx = 0;
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if(erase_flash(Flash_Data, NULL)) return 1;
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}else ++currentconfidx; // take next data position (0 - within first run after firmware flashing)
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return write2flash((const void*)&Flash_Data[currentconfidx], &the_conf, sizeof(the_conf));
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}
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static int write2flash(const void *start, const void *wrdata, uint32_t stor_size){
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int ret = 0;
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if (FLASH->CR & FLASH_CR_LOCK){ // unloch flash
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FLASH->KEYR = FLASH_KEY1;
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FLASH->KEYR = FLASH_KEY2;
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}
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// FLASH_SR_BSY2 for some
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uint32_t count = (stor_size + 7) / 8;
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volatile uint32_t *address = (volatile uint32_t*) start;
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const uint32_t *data = (const uint32_t*) wrdata;
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for(uint32_t i = 0; i < count; ++i){
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while (FLASH->SR & (FLASH_SR_BSY1)); // 1: check BSY1
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if(FLASH->SR & FLASH_SR_WRPERR){ // 2: check errors
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return 1; // write protection
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}
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FLASH->SR = 0xffff; // clear all flags
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FLASH->CR |= FLASH_CR_PG; // 3: set PG bit
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IWDG->KR = IWDG_REFRESH;
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*address++ = *data++; // 4: write both 32 bit words
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*address++ = *data++;
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while(FLASH->SR & FLASH_SR_BSY1);
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if(FLASH->SR & FLASH_SR_PGSERR){
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ret = 1; // program error - meet not 0xffff
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break;
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}else{
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for(int _ = 0; _ < 9999 && (!(FLASH->SR & FLASH_SR_EOP)); ++_);
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}
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FLASH->SR = 0xffff;
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}
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FLASH->CR &= ~(FLASH_CR_PG); // 7: clear PG bit at end of process
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FLASH->CR |= FLASH_CR_LOCK; // lock it back
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return ret;
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}
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/**
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* @brief erase_flash - erase N pages of flash memory
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* @param start - first address
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* @param end - last address (or NULL if need to erase all flash remaining)
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* @return 0 if succeed
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*/
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static int erase_flash(const void *start, const void *end){
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int ret = 0;
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if(!start) return 1;
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uint32_t startb = (((uint32_t)start - FLASH_BASE) + blocksize - 1) / blocksize, endb;
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if(!end){ // erase all remaining
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endb = FLASH_SIZE / blocksize;
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}else{ // erase a part
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endb = (((uint32_t)end - FLASH_BASE) + blocksize - 1) / blocksize;
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}
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if ((FLASH->CR & FLASH_CR_LOCK) != 0){
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FLASH->KEYR = FLASH_KEY1;
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FLASH->KEYR = FLASH_KEY2;
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}
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for(uint32_t i = startb; i < endb; ++i){
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IWDG->KR = IWDG_REFRESH;
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/* (1) Wait till no operation is on going */
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/* (2) Clear error & EOP bits */
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while ((FLASH->SR & FLASH_SR_BSY1) != 0){} /* (1) */
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FLASH->SR = 0xffff; /* (2) */
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/* (1) Set the PER bit in the FLASH_CR register to enable page erasing */
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/* (2) Select the page to erase (PNB) */
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/* (3) Set the STRT bit in the FLASH_CR register to start the erasing */
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/* (4) Wait until BSY1 cleared */
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FLASH->CR |= FLASH_CR_PER | i << FLASH_CR_PNB_Pos; /* (1) (2) */
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FLASH->CR |= FLASH_CR_STRT; /* (3) */
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while ((FLASH->SR & FLASH_SR_BSY1) != 0){} /* (4) */
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FLASH->SR = FLASH_SR_EOP;
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if(FLASH->SR & FLASH_SR_WRPERR){ /* Check Write protection error */
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ret = 1;
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FLASH->SR = FLASH_SR_WRPERR; /* Clear the flag by software by writing it at 1*/
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break;
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}
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FLASH->CR &= ~FLASH_CR_PER; // clear PER
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}
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return ret;
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}
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void dump_userconf(){
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SEND("flashsize="); printu(FLASH_SIZE);
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SEND("\nuserconf_addr="); printuhex((uint32_t)Flash_Data);
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SEND("\nuserconf_idx="); usart3_sendstr(i2str(currentconfidx));
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SEND("\nuserconf_sz="); printu(the_conf.userconf_sz);
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SEND("\nflagU16="); printuhex(the_conf.flagU16);
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SEND("\nflagU32="); printuhex(the_conf.flagU32);
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SEND("\nstr="); SEND(the_conf.str);
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newline();
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usart3_sendbuf();
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}
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int erase_storage(){
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return erase_flash(Flash_Data, NULL);
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}
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1
G0:G070/flash/flash.cflags
Normal file
1
G0:G070/flash/flash.cflags
Normal file
@ -0,0 +1 @@
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|
-std=c17
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3
G0:G070/flash/flash.config
Normal file
3
G0:G070/flash/flash.config
Normal file
@ -0,0 +1,3 @@
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#define EBUG
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#define STM32G0
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#define STM32G070xx
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1
G0:G070/flash/flash.creator
Normal file
1
G0:G070/flash/flash.creator
Normal file
@ -0,0 +1 @@
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|
[General]
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171
G0:G070/flash/flash.creator.user
Normal file
171
G0:G070/flash/flash.creator.user
Normal file
@ -0,0 +1,171 @@
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|
<?xml version="1.0" encoding="UTF-8"?>
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||||||
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<!DOCTYPE QtCreatorProject>
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|
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|
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|
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||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Desktop</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">{65a14f9e-e008-4c1b-89df-4eaa4774b6e3}</value>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">
|
||||||
|
<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/Big/Data/00__Electronics/STM32/G0-nolib/usart</value>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
|
||||||
|
<valuelist type="QVariantList" key="GenericProjectManager.GenericMakeStep.BuildTargets">
|
||||||
|
<value type="QString">all</value>
|
||||||
|
</valuelist>
|
||||||
|
<value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericMakeStep</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Сборка</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Сборка</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Build</value>
|
||||||
|
</valuemap>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.1">
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
|
||||||
|
<valuelist type="QVariantList" key="GenericProjectManager.GenericMakeStep.BuildTargets">
|
||||||
|
<value type="QString">clean</value>
|
||||||
|
</valuelist>
|
||||||
|
<value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericMakeStep</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Очистка</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Очистка</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Clean</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">2</value>
|
||||||
|
<value type="bool" key="ProjectExplorer.BuildConfiguration.ClearSystemEnvironment">false</value>
|
||||||
|
<valuelist type="QVariantList" key="ProjectExplorer.BuildConfiguration.CustomParsers"/>
|
||||||
|
<value type="bool" key="ProjectExplorer.BuildConfiguration.ParseStandardOutput">false</value>
|
||||||
|
<valuelist type="QVariantList" key="ProjectExplorer.BuildConfiguration.UserEnvironmentChanges"/>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">По умолчанию</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">GenericProjectManager.GenericBuildConfiguration</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.BuildConfigurationCount">1</value>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.Target.DeployConfiguration.0">
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
|
||||||
|
<value type="int" key="ProjectExplorer.BuildStepList.StepsCount">0</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Развёртывание</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Развёртывание</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Deploy</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">1</value>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.DeployConfiguration.CustomData"/>
|
||||||
|
<value type="bool" key="ProjectExplorer.DeployConfiguration.CustomDataEnabled">false</value>
|
||||||
|
<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.DefaultDeployConfiguration</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.DeployConfigurationCount">1</value>
|
||||||
|
<valuemap type="QVariantMap" key="ProjectExplorer.Target.RunConfiguration.0">
|
||||||
|
<valuelist type="QVariantList" key="CustomOutputParsers"/>
|
||||||
|
<value type="int" key="PE.EnvironmentAspect.Base">2</value>
|
||||||
|
<valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
|
||||||
|
<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>
|
||||||
|
<value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
|
||||||
|
</valuemap>
|
||||||
|
<value type="int" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
|
||||||
|
</valuemap>
|
||||||
|
</data>
|
||||||
|
<data>
|
||||||
|
<variable>ProjectExplorer.Project.TargetCount</variable>
|
||||||
|
<value type="int">1</value>
|
||||||
|
</data>
|
||||||
|
<data>
|
||||||
|
<variable>ProjectExplorer.Project.Updater.FileVersion</variable>
|
||||||
|
<value type="int">22</value>
|
||||||
|
</data>
|
||||||
|
<data>
|
||||||
|
<variable>Version</variable>
|
||||||
|
<value type="int">22</value>
|
||||||
|
</data>
|
||||||
|
</qtcreator>
|
||||||
1
G0:G070/flash/flash.cxxflags
Normal file
1
G0:G070/flash/flash.cxxflags
Normal file
@ -0,0 +1 @@
|
|||||||
|
-std=c++17
|
||||||
8
G0:G070/flash/flash.files
Normal file
8
G0:G070/flash/flash.files
Normal file
@ -0,0 +1,8 @@
|
|||||||
|
main.c
|
||||||
|
usart.c
|
||||||
|
|
||||||
|
flash.c
|
||||||
|
flash.h
|
||||||
|
strfunc.c
|
||||||
|
strfunc.h
|
||||||
|
usart.h
|
||||||
38
G0:G070/flash/flash.h
Normal file
38
G0:G070/flash/flash.h
Normal file
@ -0,0 +1,38 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the flash 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
|
||||||
|
|
||||||
|
/*
|
||||||
|
* struct to save user configurations
|
||||||
|
*/
|
||||||
|
typedef struct __attribute__((packed, aligned(8))){
|
||||||
|
uint16_t userconf_sz; // "magick number"
|
||||||
|
uint16_t flagU16;
|
||||||
|
uint32_t flagU32;
|
||||||
|
char str[32];
|
||||||
|
} user_conf;
|
||||||
|
|
||||||
|
extern user_conf the_conf; // global user config (read from FLASH to RAM)
|
||||||
|
// data from ld-file: start address of storage
|
||||||
|
|
||||||
|
void flashstorage_init();
|
||||||
|
int store_userconf();
|
||||||
|
void dump_userconf();
|
||||||
|
int erase_storage();
|
||||||
|
|
||||||
4
G0:G070/flash/flash.includes
Normal file
4
G0:G070/flash/flash.includes
Normal file
@ -0,0 +1,4 @@
|
|||||||
|
.
|
||||||
|
../inc
|
||||||
|
../inc/Fx
|
||||||
|
../inc/cm
|
||||||
122
G0:G070/flash/main.c
Normal file
122
G0:G070/flash/main.c
Normal file
@ -0,0 +1,122 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the usart 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 <stm32g0.h>
|
||||||
|
#include "flash.h"
|
||||||
|
#include "strfunc.h"
|
||||||
|
#include "usart.h"
|
||||||
|
|
||||||
|
// KEY (intpullup->0) - PC0
|
||||||
|
// LED - PC8
|
||||||
|
|
||||||
|
volatile uint32_t Tms = 0;
|
||||||
|
|
||||||
|
/* Called when systick fires */
|
||||||
|
void sys_tick_handler(void){
|
||||||
|
++Tms;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void gpio_setup(void){
|
||||||
|
RCC->IOPENR |= RCC_IOPENR_GPIOCEN; // enable PC
|
||||||
|
// set PC8 as opendrain output, PC0 is pullup input, other as default (AIN)
|
||||||
|
GPIOC->MODER = (0xffffffff & ~(GPIO_MODER_MODE8 | GPIO_MODER_MODE0)) | GPIO_MODER_MODER8_O;
|
||||||
|
GPIOC->PUPDR = GPIO_PUPDR0_PU; // pullup
|
||||||
|
GPIOC->OTYPER = GPIO_OTYPER_OT8; // open drain
|
||||||
|
}
|
||||||
|
|
||||||
|
static const char *helpmsg =
|
||||||
|
"'1' - change U16 value\n"
|
||||||
|
"'2' - change U32 value\n"
|
||||||
|
"'d' - dumpconf\n"
|
||||||
|
"'e' - erase flash\n"
|
||||||
|
"'f' - save conf to flash\n"
|
||||||
|
"'s' - change string (up to 31 symbol)\n"
|
||||||
|
"'t' - print Tms\n"
|
||||||
|
;
|
||||||
|
|
||||||
|
static void chstr(const char *s){
|
||||||
|
int i = 0;
|
||||||
|
for(; i < 31 && *s; ++i){
|
||||||
|
the_conf.str[i] = *s++;
|
||||||
|
}
|
||||||
|
the_conf.str[i] = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(void){
|
||||||
|
StartHSE();
|
||||||
|
SysTick_Config(8000); // 1ms counter
|
||||||
|
flashstorage_init();
|
||||||
|
gpio_setup();
|
||||||
|
usart3_setup();
|
||||||
|
uint32_t T = 0;
|
||||||
|
int sent = 0;
|
||||||
|
/* Do nothing in main loop */
|
||||||
|
while (1){
|
||||||
|
if(Tms - T > 499){ // blink LED
|
||||||
|
T = Tms;
|
||||||
|
pin_toggle(GPIOC, 1<<8);
|
||||||
|
usart3_sendbuf();
|
||||||
|
}
|
||||||
|
if(pin_read(GPIOC, 1<<0) == 0){ // key pressed - send data over USART
|
||||||
|
if(!sent){
|
||||||
|
usart3_sendstr("Button pressed\n");
|
||||||
|
sent = 1;
|
||||||
|
}
|
||||||
|
}else sent = 0;
|
||||||
|
int wasbo = 0;
|
||||||
|
char *rcv = usart3_getline(&wasbo);
|
||||||
|
if(wasbo) usart3_sendstr("Buffer overflow occured @ last message\n");
|
||||||
|
if(rcv){
|
||||||
|
char cmd = *rcv++;
|
||||||
|
uint32_t U, got = 0;
|
||||||
|
const char *n = getnum(rcv, &U);
|
||||||
|
if(n != rcv) got = 1;
|
||||||
|
switch(cmd){
|
||||||
|
case '1':
|
||||||
|
if(!got || U > 0xffff) SEND("Need an uint16_t number\n");
|
||||||
|
else the_conf.flagU16 = (uint16_t)U;
|
||||||
|
SEND("Changed to "); printuhex(the_conf.flagU16); newline();
|
||||||
|
break;
|
||||||
|
case '2':
|
||||||
|
if(!got) SEND("Need an uint32_t number\n");
|
||||||
|
else the_conf.flagU32 = U;
|
||||||
|
SEND("Changed to "); printuhex(the_conf.flagU32); newline();
|
||||||
|
break;
|
||||||
|
case 'd':
|
||||||
|
dump_userconf();
|
||||||
|
break;
|
||||||
|
case 'e':
|
||||||
|
if(erase_storage()) SEND("Error erasing\n");
|
||||||
|
else SEND("Erased OK\n");
|
||||||
|
break;
|
||||||
|
case 'f':
|
||||||
|
if(store_userconf()) SEND("Error: can't save\n");
|
||||||
|
else SEND("OK, stored\n");
|
||||||
|
break;
|
||||||
|
case 's':
|
||||||
|
chstr(omit_spaces(rcv));
|
||||||
|
SEND("Changed to: "); SEND(the_conf.str); newline();
|
||||||
|
break;
|
||||||
|
case 't':
|
||||||
|
SEND("Tms="); printu(Tms); newline();
|
||||||
|
break;
|
||||||
|
default: SEND(helpmsg);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
89
G0:G070/flash/openocd.cfg
Normal file
89
G0:G070/flash/openocd.cfg
Normal file
@ -0,0 +1,89 @@
|
|||||||
|
# script for stm32g0x family
|
||||||
|
|
||||||
|
#
|
||||||
|
# stm32g0 devices support SWD transports only.
|
||||||
|
#
|
||||||
|
source [find interface/stlink.cfg]
|
||||||
|
source [find target/swj-dp.tcl]
|
||||||
|
source [find mem_helper.tcl]
|
||||||
|
|
||||||
|
if { [info exists CHIPNAME] } {
|
||||||
|
set _CHIPNAME $CHIPNAME
|
||||||
|
} else {
|
||||||
|
set _CHIPNAME stm32g0x
|
||||||
|
}
|
||||||
|
|
||||||
|
set _ENDIAN little
|
||||||
|
|
||||||
|
# Work-area is a space in RAM used for flash programming
|
||||||
|
# Smallest proposed target has 8kB ram, use 4kB by default to avoid surprises
|
||||||
|
if { [info exists WORKAREASIZE] } {
|
||||||
|
set _WORKAREASIZE $WORKAREASIZE
|
||||||
|
} else {
|
||||||
|
set _WORKAREASIZE 0x1000
|
||||||
|
}
|
||||||
|
|
||||||
|
#jtag scan chain
|
||||||
|
if { [info exists CPUTAPID] } {
|
||||||
|
set _CPUTAPID $CPUTAPID
|
||||||
|
} else {
|
||||||
|
# Section 37.5.5 - corresponds to Cortex-M0+
|
||||||
|
set _CPUTAPID 0x0bc11477
|
||||||
|
}
|
||||||
|
|
||||||
|
swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
|
||||||
|
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
|
||||||
|
|
||||||
|
set _TARGETNAME $_CHIPNAME.cpu
|
||||||
|
target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
|
||||||
|
|
||||||
|
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
|
||||||
|
|
||||||
|
set _FLASHNAME $_CHIPNAME.flash
|
||||||
|
flash bank $_FLASHNAME stm32l4x 0 0 0 0 $_TARGETNAME
|
||||||
|
|
||||||
|
# reasonable default
|
||||||
|
adapter speed 2000
|
||||||
|
|
||||||
|
adapter srst delay 100
|
||||||
|
if {[using_jtag]} {
|
||||||
|
jtag_ntrst_delay 100
|
||||||
|
}
|
||||||
|
|
||||||
|
reset_config srst_nogate
|
||||||
|
|
||||||
|
if {![using_hla]} {
|
||||||
|
# if srst is not fitted use SYSRESETREQ to
|
||||||
|
# perform a soft reset
|
||||||
|
cortex_m reset_config sysresetreq
|
||||||
|
}
|
||||||
|
|
||||||
|
proc stm32g0x_default_reset_start {} {
|
||||||
|
# Reset clock is HSI16 (16 MHz)
|
||||||
|
adapter speed 2000
|
||||||
|
}
|
||||||
|
|
||||||
|
proc stm32g0x_default_examine_end {} {
|
||||||
|
# DBGMCU_CR |= DBG_STANDBY | DBG_STOP
|
||||||
|
mmw 0x40015804 0x00000006 0
|
||||||
|
|
||||||
|
# Stop watchdog counters during halt
|
||||||
|
# DBGMCU_APB1_FZ |= DBG_IWDG_STOP | DBG_WWDG_STOP
|
||||||
|
mmw 0x40015808 0x00001800 0
|
||||||
|
}
|
||||||
|
|
||||||
|
proc stm32g0x_default_reset_init {} {
|
||||||
|
# Increase clock to 64 Mhz
|
||||||
|
mmw 0x40022000 0x00000002 0x00000005 ;# FLASH_ACR: Latency = 2
|
||||||
|
mww 0x4002100C 0x30000802 ;# RCC_PLLCFGR = PLLR=/2, PLLN=8, PLLM=/1, PLLSRC=0x2
|
||||||
|
mmw 0x40021000 0x01000000 0x00000000 ;# RCC_CR |= PLLON
|
||||||
|
mmw 0x40021008 0x00000002 0x00000005 ;# RCC_CFGR: SW=PLLRCLK
|
||||||
|
|
||||||
|
# Boost JTAG frequency
|
||||||
|
adapter speed 4000
|
||||||
|
}
|
||||||
|
|
||||||
|
# Default hooks
|
||||||
|
$_TARGETNAME configure -event examine-end { stm32g0x_default_examine_end }
|
||||||
|
$_TARGETNAME configure -event reset-start { stm32g0x_default_reset_start }
|
||||||
|
$_TARGETNAME configure -event reset-init { stm32g0x_default_reset_init }
|
||||||
269
G0:G070/flash/strfunc.c
Normal file
269
G0:G070/flash/strfunc.c
Normal file
@ -0,0 +1,269 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the flash 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 <stm32g0.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;
|
||||||
|
}
|
||||||
|
|
||||||
30
G0:G070/flash/strfunc.h
Normal file
30
G0:G070/flash/strfunc.h
Normal file
@ -0,0 +1,30 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the flash 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);
|
||||||
174
G0:G070/flash/usart.c
Normal file
174
G0:G070/flash/usart.c
Normal file
@ -0,0 +1,174 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the flash 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 <stm32g0.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "usart.h"
|
||||||
|
|
||||||
|
// RX/TX DMA->CCR without EN flag
|
||||||
|
#define DMARXCCR (DMA_CCR_MINC | DMA_CCR_TCIE | DMA_CCR_TEIE)
|
||||||
|
#define DMATXCCR (DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_TCIE | DMA_CCR_TEIE)
|
||||||
|
|
||||||
|
static volatile int txrdy = 1, rxrdy = 0; // transmission done, next line received
|
||||||
|
static volatile int bufovr = 0, wasbufovr = 0; // Rx buffer overflow or error flag -> delete next line
|
||||||
|
static volatile int rbufno = 0, tbufno = 0; // current buf number
|
||||||
|
static volatile char rbuf[2][UARTBUFSZ], tbuf[2][UARTBUFSZ]; // receive & transmit buffers
|
||||||
|
static volatile int rxlen[2] = {0}, txlen[2] = {0};
|
||||||
|
|
||||||
|
char *usart3_getline(int *wasbo){
|
||||||
|
if(wasbo) *wasbo = wasbufovr;
|
||||||
|
wasbufovr = 0;
|
||||||
|
if(!rxrdy) return NULL;
|
||||||
|
rxrdy = 0; // clear ready flag
|
||||||
|
return (char*)rbuf[!rbufno]; // current buffer is in filling stage, return old - filled - buffer
|
||||||
|
}
|
||||||
|
|
||||||
|
#define USART_BRR(speed) ((64000000 + speed/2) / speed)
|
||||||
|
|
||||||
|
// USART3 @ PD8 (Tx) and PD9 (Rx) - both AF0
|
||||||
|
void usart3_setup(){
|
||||||
|
RCC->IOPENR |= RCC_IOPENR_GPIODEN; // enable PD
|
||||||
|
RCC->AHBENR |= RCC_AHBENR_DMA1EN; // enable DMA1
|
||||||
|
// set PD8 and PD9 as AF
|
||||||
|
GPIOD->MODER = (GPIOD->MODER & ~(GPIO_MODER_MODE8 | GPIO_MODER_MODE9))
|
||||||
|
| GPIO_MODER_MODER8_AF | GPIO_MODER_MODER9_AF;
|
||||||
|
// AF0 for USART3 @ PD8/PD9
|
||||||
|
GPIOD->AFR[1] = GPIOD->AFR[1] & ~(GPIO_AFRH_AFSEL8 | GPIO_AFRH_AFSEL9);
|
||||||
|
// enable USART3 clocking
|
||||||
|
RCC->APBENR1 |= RCC_APBENR1_USART3EN;
|
||||||
|
// baudrate 115200
|
||||||
|
USART3->BRR = USART_BRR(115200);
|
||||||
|
// eol character: '/n'
|
||||||
|
USART3->CR2 = USART_CR2_ADD_VAL('\n');
|
||||||
|
// enable DMA transmission
|
||||||
|
USART3->CR3 = USART_CR3_DMAT | USART_CR3_DMAR;
|
||||||
|
// set up DMA channels: 2 - Tx, 3 - Rx
|
||||||
|
// Tx channel: mem++, mem->periph, 8bit, compl.&err. irq
|
||||||
|
DMA1_Channel2->CCR = DMATXCCR;
|
||||||
|
DMA1_Channel2->CPAR = (uint32_t) &USART3->TDR; // peripherial address
|
||||||
|
// Rx channel: mem++, periph->mem, 8bit, compl.&err. irq
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR;
|
||||||
|
DMA1_Channel3->CPAR = (uint32_t) &USART3->RDR; // peripherial address
|
||||||
|
DMA1_Channel3->CNDTR = UARTBUFSZ;
|
||||||
|
DMA1_Channel3->CMAR = (uint32_t)&rbuf[rbufno];
|
||||||
|
// set up DMAMUX channels: 55 - USART3_TX, 54 - USART3_RX
|
||||||
|
// enumeration of DMAMUX starts from 0 (DMA - from 1)!
|
||||||
|
DMAMUX1_Channel1->CCR = 55;
|
||||||
|
DMAMUX1_Channel2->CCR = 54;
|
||||||
|
// charmatch interrupt, enable transmitter and receiver, enable usart
|
||||||
|
USART3->CR1 = USART_CR1_CMIE | USART_CR1_TE | USART_CR1_RE | USART_CR1_UE;
|
||||||
|
USART3->ICR = 0xffffffff; // clear all flags
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR | DMA_CCR_EN; // start receiving right now
|
||||||
|
NVIC_EnableIRQ(USART3_4_IRQn);
|
||||||
|
NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void mymemcpy(char *dest, const char *src, int len){
|
||||||
|
while(len--) *dest++ = *src++;
|
||||||
|
}
|
||||||
|
|
||||||
|
int usart3_send(const char *str, int len){
|
||||||
|
int rest = UARTBUFSZ - txlen[tbufno];
|
||||||
|
if(rest == 0 && !txrdy) return 0; // buffer is full while transmission in process
|
||||||
|
if(len < rest) rest = len;
|
||||||
|
mymemcpy((char*)(tbuf[tbufno] + txlen[tbufno]), str, rest);
|
||||||
|
txlen[tbufno] += rest;
|
||||||
|
if(!txrdy) return rest;
|
||||||
|
if(txlen[tbufno] == UARTBUFSZ) usart3_sendbuf();
|
||||||
|
if(rest == len) return len;
|
||||||
|
len -= rest;
|
||||||
|
// now fill another - empty - buffer
|
||||||
|
if(len > UARTBUFSZ) len = UARTBUFSZ;
|
||||||
|
mymemcpy((char*)tbuf[tbufno], str + rest, len);
|
||||||
|
txlen[tbufno] = len;
|
||||||
|
return rest + len;
|
||||||
|
}
|
||||||
|
|
||||||
|
int usart3_sendstr(const char *str){
|
||||||
|
int l = strlen(str);
|
||||||
|
return usart3_send(str, l);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief usart3_sendbuf - send current buffer
|
||||||
|
*/
|
||||||
|
void usart3_sendbuf(){
|
||||||
|
if(!txrdy || txlen[tbufno] == 0) return;
|
||||||
|
// set up DMA
|
||||||
|
DMA1_Channel2->CCR = DMATXCCR;
|
||||||
|
DMA1_Channel2->CMAR = (uint32_t)&tbuf[tbufno];
|
||||||
|
DMA1_Channel2->CNDTR = txlen[tbufno];
|
||||||
|
USART3->ICR = USART_ICR_TCCF; // clear TC flag
|
||||||
|
txrdy = 0;
|
||||||
|
// activate DMA
|
||||||
|
DMA1_Channel2->CCR = DMATXCCR | DMA_CCR_EN;
|
||||||
|
tbufno = !tbufno; // swap buffers
|
||||||
|
txlen[tbufno] = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
// return amount of bytes sents
|
||||||
|
int usart3_send_blocking(const char *str, int len){
|
||||||
|
if(!txrdy) return 0;
|
||||||
|
USART3->CR1 |= USART_CR1_TE;
|
||||||
|
for(int i = 0; i < len; ++i){
|
||||||
|
while(!(USART3->ISR & USART_ISR_TXE_TXFNF));
|
||||||
|
USART3->TDR = *str++;
|
||||||
|
}
|
||||||
|
return len;
|
||||||
|
}
|
||||||
|
|
||||||
|
// interrupt by '\n'
|
||||||
|
void usart3_4_isr(){
|
||||||
|
if(USART3->ISR & USART_ISR_CMF){ // got '\n' @ USART3
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR;
|
||||||
|
if(!bufovr){ // forget about broken line @ buffer overflow
|
||||||
|
rxrdy = 1;
|
||||||
|
int l = UARTBUFSZ - DMA1_Channel3->CNDTR - 1; // strlen
|
||||||
|
rxlen[rbufno] = l;
|
||||||
|
rbuf[rbufno][l] = 0;
|
||||||
|
rbufno = !rbufno;
|
||||||
|
}else{
|
||||||
|
bufovr = 0;
|
||||||
|
wasbufovr = 1;
|
||||||
|
}
|
||||||
|
// reload DMA Rx with next buffer
|
||||||
|
DMA1_Channel3->CMAR = (uint32_t)&rbuf[rbufno];
|
||||||
|
DMA1_Channel3->CNDTR = UARTBUFSZ;
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR | DMA_CCR_EN;
|
||||||
|
}
|
||||||
|
USART3->ICR = 0xffffffff; // clear all flags
|
||||||
|
}
|
||||||
|
|
||||||
|
// ch2 - Tx, ch3 - Rx
|
||||||
|
void dma1_channel2_3_isr(){
|
||||||
|
uint32_t isr = DMA1->ISR;
|
||||||
|
if(isr & (DMA_ISR_TCIF2 | DMA_ISR_TEIF2)){ // transfer complete or error
|
||||||
|
txrdy = 1;
|
||||||
|
//DMA1_Channel2->CCR = DMATXCCR;
|
||||||
|
}
|
||||||
|
if(isr & (DMA_ISR_TCIF3 | DMA_ISR_TEIF3)){ // receive complete or error -> buffer overflow
|
||||||
|
if(rbuf[rbufno][UARTBUFSZ-1] != '\n'){ // last symbol is not a newline
|
||||||
|
bufovr = 1;
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR;
|
||||||
|
DMA1_Channel3->CNDTR = UARTBUFSZ;
|
||||||
|
DMA1_Channel3->CCR = DMARXCCR | DMA_CCR_EN;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
DMA1->IFCR = 0xffffffff; // clear all flags
|
||||||
|
}
|
||||||
35
G0:G070/flash/usart.h
Normal file
35
G0:G070/flash/usart.h
Normal file
@ -0,0 +1,35 @@
|
|||||||
|
/*
|
||||||
|
* This file is part of the flash 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 "strfunc.h"
|
||||||
|
|
||||||
|
#define UARTBUFSZ (512)
|
||||||
|
|
||||||
|
#define SEND(x) do{usart3_sendstr(x);}while(0)
|
||||||
|
#define newline() do{usart3_sendstr("\n");}while(0)
|
||||||
|
#define printu(x) do{usart3_sendstr(u2str(x));}while(0)
|
||||||
|
#define printuhex(x) do{usart3_sendstr(uhex2str(x));}while(0)
|
||||||
|
|
||||||
|
void usart3_setup();
|
||||||
|
int usart3_send_blocking(const char *str, int len);
|
||||||
|
int usart3_send(const char *str, int len);
|
||||||
|
void usart3_sendbuf();
|
||||||
|
char *usart3_getline(int *wasbo);
|
||||||
|
int usart3_sendstr(const char *str);
|
||||||
Loading…
x
Reference in New Issue
Block a user