STM32CubeMX开发之路—8Flash读写

读写一个数据的实例：

https://blog.csdn.net/weixin_41294615/article/details/87610039

 

国外老哥的程序：

https://controllerstech.com/flash-programming-in-stm32/

 

直接贴代码了，说明都在代码里：

 

下面是C文件：

//下面这些include 文件用的时候都包含进去；

#include "flash_read_write.h"

#include "stm32f1xx_hal.h"
#include "stdio.h"
#include "string.h"

 

//这个地址是stm32f103c8t6的最后一页的首地址

uint32_t addr = 0x08007000;

/*FLASH写入程序*/
uint32_t Flash_Write_Data (uint32_t StartPageAddress, uint32_t * DATA_32)
{
//声明结构体
static FLASH_EraseInitTypeDef EraseInitStruct;

//错误处理
uint32_t PAGEError;

int sofar=0;//计数作用


//计算要写入的数据的长度，正确的代码被我注释掉了，strlen总是报错，烦得很，直接把我要写的数据的长度赋值了，有能力的同学自己研究一下这句代码；
// int numberofwords = (strlen(DATA_32)/4) + ((strlen(DATA_32) % 4) != 0);

下面这个9是我直接赋值的，我就是打算写9个32位的数据，你需要些几个你就改成几；
int numberofwords = 9;

printf("number of words = %d",numberofwords);

//flash写入之前需要解锁flash
HAL_FLASH_Unlock();

//擦除flash，准备写入数据
// uint32_t StartPage = GetPage(StartPageAddress);
uint32_t EndPageAdress = StartPageAddress + numberofwords*4;
// uint32_t EndPage = GetPage(EndPageAdress);

//擦除页面的动作，擦除页面的地址，擦除页面的数量
EraseInitStruct.TypeErase = FLASH_TYPEERASE_PAGES;
EraseInitStruct.PageAddress = StartPageAddress;
EraseInitStruct.NbPages =1;

//下面这个函数就是擦除页面的函数
if (HAL_FLASHEx_Erase(&EraseInitStruct, &PAGEError) != HAL_OK)
{
//擦除页面时发生的错误，送到这里处理
return HAL_FLASH_GetError ();
}

//一个字一个字的写入flash
StartPageAddress=0x08007000;
while (sofar<numberofwords)
{
if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, StartPageAddress, DATA_32[sofar]) == HAL_OK)
{
StartPageAddress += 4; // use StartPageAddress += 2 for half word and 8 for double word
sofar++;
}
else
{
/* Error occurred while writing data in Flash memory*/
return HAL_FLASH_GetError ();
}
}
StartPageAddress=0x08007000;

//给Flash上锁
HAL_FLASH_Lock();

return 0;
}

void Flash_Read_Data (uint32_t StartPageAddress, __IO uint32_t *DATA_32)
{
StartPageAddress=0x08007000;
while (1)
{
*DATA_32 = *(__IO uint32_t *)StartPageAddress;
if (*DATA_32 == 0xffffffff)
{
*DATA_32 = '\0';
break;
}
StartPageAddress += 4;
DATA_32++;
}
}

 

 

 

头文件：

#ifndef __flash_read_write_H__
#define __flash_read_write_H__

#include "stm32f1xx_hal.h"

/*FLASH写入程序*/
uint32_t Flash_Write_Data (uint32_t StartPageAddress, uint32_t * DATA_32);

/*FLASH读取打印程序*/
void Flash_Read_Data (uint32_t StartPageAddress, __IO uint32_t * DATA_32);

#endif

 

 

主函数应用文件代码示例：

下面这些是数据声明：

//从flash里面读出的数据存在该数组
uint32_t start_addr=0x08007000;
__IO uint32_t data_read_fromflash[9];
uint32_t data_tobe_wrote[9] = {78,21,89,91,12,23,6789,321,9};

 

应用程序：

Flash_Write_Data(start_addr,data_tobe_wrote);
HAL_Delay(100);
Flash_Read_Data(start_addr,data_read_fromflash);

int i=0;
for(i=0;i<9;i++){
printf("\r\nRx_Data: %d\r\n",data_read_fromflash[i]);
HAL_Delay(100);
}