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5 changed files with 675 additions and 51 deletions
221
controller/fw/embed/src/flash.cpp
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221
controller/fw/embed/src/flash.cpp
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#include "flash.h"
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#include <stdbool.h>
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#include "hal_conf_extra.h"
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static uint32_t write_ptr = SECTOR_6;
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void flash_unlock(){
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// Check if flash is locked
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if(!(FLASH->CR & FLASH_CR_LOCK)) {
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return; // Already unlocked
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}
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// Write flash key sequence to unlock
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FLASH->KEYR = 0x45670123; // First key
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FLASH->KEYR = 0xCDEF89AB; // Second key
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}
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void flash_lock() {
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if(FLASH->CR & FLASH_CR_LOCK) {
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return; // Already locked
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}
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FLASH->CR |= FLASH_CR_LOCK; // Lock flash memory
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}
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void erase_sector(uint8_t sector){
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// Wait if flash is busy
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while(FLASH_BUSY);
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// Check if flash is locked and unlock if needed
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if(FLASH->CR & FLASH_CR_LOCK) {
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flash_unlock();
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}
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// Set sector erase bit and sector number
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FLASH->CR |= FLASH_CR_SER;
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FLASH->CR &= ~FLASH_CR_SNB;
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FLASH->CR |= (sector << FLASH_CR_SNB_Pos) & FLASH_CR_SNB_Msk;
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// Start erase
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FLASH->CR |= FLASH_CR_STRT;
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// Wait for erase to complete
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while(FLASH_BUSY);
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// Clear sector erase bit
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FLASH->CR &= ~FLASH_CR_SER;
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}
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void flash_program_word(uint32_t address,uint32_t data,uint32_t byte_len){
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// Wait if flash is busy
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while(FLASH_BUSY);
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// Check if flash is locked and unlock if needed
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if(FLASH->CR & FLASH_CR_LOCK) {
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flash_unlock();
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}
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// Set program bit 32bit programm size and Write data to address
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if(byte_len == 1) {
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FLASH_8BYTE;
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FLASH->CR |= FLASH_CR_PG;
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*(volatile uint8_t*)address = (uint8_t)data;
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} else {
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FLASH_32BYTE;
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FLASH->CR |= FLASH_CR_PG;
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*(volatile uint32_t*)address = data;
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}
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// Wait for programming to complete
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while(FLASH_BUSY);
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// Clear program bit
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FLASH->CR &= ~FLASH_CR_PG;
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}
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void flash_write(uint32_t addr, FLASH_RECORD* record){
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uint32_t* data = (uint32_t*)record;
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uint32_t size = FLASH_RECORD_SIZE / 4; //count words in struct
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// Wait if flash is busy
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while(FLASH_BUSY);
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// Check if flash is locked and unlock if needed
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if(FLASH->CR & FLASH_CR_LOCK) {
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flash_unlock();
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}
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// Set program bit and write data to flash
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FLASH_32BYTE;
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FLASH->CR |= FLASH_CR_PG;
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for(int i = 0;i < size;i++){
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*(volatile uint32_t*)(addr + i) = data[i];
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write_ptr++;
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}
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// Clear program bit
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FLASH->CR &= ~FLASH_CR_PG;
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flash_lock();
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}
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uint8_t flash_read_word(uint32_t address){
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// Check if address is valid
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if(address < FLASH_BASE || address > FLASH_END) {
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return 0;
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}
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// Read byte from flash memory
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return *((volatile uint8_t*)address);
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}
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// Wait if flash
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bool validata_crc(FLASH_RECORD* crc){
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return crc->crc == 0x6933? true : false;
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}
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uint16_t validate_crc16(uint8_t *data, uint32_t length) {
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uint16_t crc = 0xFFFF; // Начальное значение для MODBUS
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while (length--) {
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crc ^= *data++; // XOR с очередным байтом данных
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for (uint8_t i = 0; i < 8; i++) {
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if (crc & 0x0001) {
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crc = (crc >> 1) ^ 0xA001; // Полином 0x8005 (reverse)
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} else {
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crc >>= 1;
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}
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}
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}
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return crc; // Возвращаем вычисленный CRC
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}
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/* read struct from FLASH */
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void flash_read(uint32_t addr,FLASH_RECORD* ptr){
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uint8_t* flash_ptr = (uint8_t*)addr;
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uint8_t* dest = (uint8_t*)ptr;
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for(int i = 0;i < FLASH_RECORD_SIZE;i++)
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dest[i] = flash_ptr[i];
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}
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void compact_page(){
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FLASH_RECORD latest[PARAM_COUNT] = {0};
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for(int i = (uint32_t)SECTOR_6;i < (uint32_t)SECTOR_7;i += FLASH_RECORD_SIZE) {
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FLASH_RECORD rec;
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flash_read(i,&rec);
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uint16_t calculated_crc = validate_crc16((uint8_t*)&rec, sizeof(FLASH_RECORD) - 2); //Вычисляем CRC без последних двух байтов.STRUCT - 2BYTE__CRC
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if (calculated_crc == rec.crc && rec.data_id < PARAM_COUNT) {
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// Если CRC совпадает и ID параметра валидный, сохраняем последнее значение
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latest[rec.data_id] = rec;
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}
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else
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//Если не совпадает продолжить читать флэш
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continue;
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}
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erase_sector(6);
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write_ptr = SECTOR_6; // Сброс на начало
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for (int i = 0; i < PARAM_COUNT; i++) {
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if (latest[i].data_id != 0xFF) {
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// Выравнивание перед каждой записью
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if (write_ptr % 4 != 0) {
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write_ptr += (4 - (write_ptr % 4));
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}
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flash_write(write_ptr, &latest[i]);
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}
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}
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}
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void write_param(uint8_t param_id, uint8_t val) {
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FLASH_RECORD param_flash = {param_id, val};
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// __disable_irq(); // Запрещаем прерывания на время всей операции
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param_flash.crc = validate_crc16((uint8_t*)¶m_flash,sizeof(param_flash) - 2);//Нахождение CRC для данных, хранящихся во флэш памяти
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// Проверка выравнивания ДО проверки границ сектора кратного 4
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if (write_ptr % 4 != 0) {
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write_ptr += (4 - (write_ptr % 4));
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}
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// Проверка переполнения с учётом выравнивания
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if (write_ptr + FLASH_RECORD_SIZE >= SECTOR_6_END) {
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compact_page(); // После compact_page write_ptr обновляется
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// Повторно выравниваем после функции. То есть сколько не хватает для кратности
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if (write_ptr % 4 != 0) {
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write_ptr += (4 - (write_ptr % 4));
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}
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}
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flash_write(write_ptr, ¶m_flash); //внутри функции итак автоматические инкрементируется указатель write_ptr на размер структуры
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// __enable_irq(); // Разрешаем прерывания
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}
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FLASH_RECORD* load_params(){
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__disable_irq();
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static FLASH_RECORD latest[PARAM_COUNT] = {0};
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FLASH_RECORD res;
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for(uint32_t addr = SECTOR_6;addr < SECTOR_6_END;addr +=FLASH_RECORD_SIZE) {
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flash_read(addr,&res);
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/* провекра CRC */
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uint16_t calculated_crc = validate_crc16((uint8_t*)&res, sizeof(FLASH_RECORD) - 2); //Вычисляем CRC без последних двух байтов.STRUCT - 2BYTE__CRC
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if (calculated_crc != res.crc || res.data_id >= PARAM_COUNT)
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continue;
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else{
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latest[res.data_id] = res;
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}
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write_ptr = addr + FLASH_RECORD_SIZE;
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}
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__enable_irq();
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return latest;
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}
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