stm32f031 flash读写代码

以下是一个简单的示例代码，用于在STM32F031微控制器上进行Flash读写操作：

#include "stm32f0xx.h"

#define ADDR_FLASH_PAGE_127 ((uint32_t)0x0803F800) /* Flash 127 Page Address */

void flash_erase_page(uint32_t page_address)
{
    FLASH_Unlock(); /* Unlock the Flash to enable the flash control register access */
    
    /* Clear pending flags (if any) */
    FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPERR);
    
    /* Erase the Flash page */
    FLASH_ErasePage(page_address);
    
    FLASH_Lock(); /* Lock the Flash to disable the flash control register access */
}

void flash_write_word(uint32_t address, uint32_t data)
{
    FLASH_Unlock(); /* Unlock the Flash to enable the flash control register access */
    
    /* Clear pending flags (if any) */
    FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPERR);
    
    /* Write the word data into the specified address */
    FLASH_ProgramWord(address, data);
    
    FLASH_Lock(); /* Lock the Flash to disable the flash control register access */
}

uint32_t flash_read_word(uint32_t address)
{
    return (*(__IO uint32_t*) address);
}

int main(void)
{
    uint32_t data = 0x12345678;
    uint32_t read_data;
    
    flash_erase_page(ADDR_FLASH_PAGE_127); /* Erase the flash page */
    flash_write_word(ADDR_FLASH_PAGE_127, data); /* Write data to flash */
    read_data = flash_read_word(ADDR_FLASH_PAGE_127); /* Read data from flash */
    
    return 0;
}

需要注意的是，Flash写入操作会擦除整个Flash页面，因此在写入之前需要先擦除页面。Flash读取操作可以直接从指定地址读取数据。同时，需要在进行Flash操作之前解锁Flash，操作完成之后再锁定Flash以保护Flash数据的完整性。