91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
#include "flash.h"
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#include "stm32f10x.h"
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#include <string.h>
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typedef struct {
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uint32_t version; // 序号/标志位
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uint32_t write_count;
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uint32_t error_count;
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float temperature;
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uint32_t crc32; // 最后一个成员：CRC校验
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} FlashData_t;
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// 最后一页页号（从0开始）
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#define FLASH_PAGE_NUM 63
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// 每页大小
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#define FLASH_PAGE_SIZE 1024
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// Flash起始地址
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#define FLASH_BASE_ADDR 0x08000000
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// 最后一页的地址
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#define FLASH_LAST_PAGE_ADDR (FLASH_BASE_ADDR + FLASH_PAGE_NUM * FLASH_PAGE_SIZE)
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// 即：0x08000000 + 63 * 1024 = 0x0800FC00
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#define FLASH_TARGET_ADDR ((uint32_t)FLASH_LAST_PAGE_ADDR) // 最后1KB起始地址
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// 擦除对应页（1KB）
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void Flash_ErasePage(uint32_t page_addr) {
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FLASH_Unlock();
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FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);
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FLASH_ErasePage(page_addr);
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FLASH_Lock();
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}
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// 写入结构体到 Flash（页擦除+按字写入）
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void Flash_WriteStruct(uint32_t addr, void* data, uint16_t size) {
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uint16_t i;
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uint32_t* pData = (uint32_t*)data;
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FLASH_Unlock();
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FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);
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FLASH_ErasePage(addr); // 注意：必须按页擦除
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for (i = 0; i < (size + 3) / 4; i++) { // 以 4 字节为单位写入
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FLASH_ProgramWord(addr + i * 4, pData[i]);
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}
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FLASH_Lock();
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}
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// 从 Flash 读取结构体
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void Flash_ReadStruct(uint32_t addr, void* data, uint16_t size) {
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memcpy(data, (void*)addr, size);
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}
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FlashData_t readData;
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void flash_Test(){
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FlashData_t myData = {
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.write_count = 123,
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.error_count = 456,
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.temperature = 36.5f
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};
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FlashData_t readData;
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// 写入结构体
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Flash_WriteStruct(FLASH_TARGET_ADDR, &myData, sizeof(FlashData_t));
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// 读取结构体
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Flash_ReadStruct(FLASH_TARGET_ADDR, &readData,sizeof(FlashData_t));
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}
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