STM32Flash擦出和编写

只看该作者 · 2017-11-20 17:17

对于STM32的flash地址不是太明白。。。求解答。。我应该怎么擦出和编写呢？我能从0x8002000开始擦出吗？我需要写入大概2000个。

只看该作者 · 2017-11-20 17:29

应该是有捷径的，2000个咋弄

只看该作者 · 2017-11-20 17:40

可以擦除，但必须以块为单位，不同型号块的大小不同，需要查资料。

3万 · 2017-11-20 19:26

ST官方不是有参考程序吗

只看该作者 · 2017-11-20 20:50

/**************************************************************************************
* FunctionName : FLSEraseFlash()
* Description : Flash擦除
* EntryParameter : sAddr - 起始地址，eAddr - 结束地址，pageSize - 页大小
* ReturnValue : None
**************************************************************************************/
void FLSEraseFlash(u32 sAddr, u32 eAddr, u32 pageSize)
{
u8 i, maxPag;
volatile FLASH_Status fshStu = FLASH_COMPLETE;

maxPag = (eAddr - sAddr) / pageSize;                                     // 页数
FLASH_Unlock();                                                          // 解锁的闪存程序擦除控制器
FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR);

for (i=0; ((i
{
      fshStu = FLASH_ErasePage(sAddr + (pageSize * i));                      // 擦除FLASH页
}

FLASH_Lock();                                                             // 锁Flash
}
复制代码
/**************************************************************************************
* FunctionName : FLSWriteFlash()
* Description : 写Flash
* EntryParameter : wrtAddr - 写地址，pDat - 数据，len - 数据长度
* ReturnValue : 成功返回0，否则返回1
**************************************************************************************/
u8 FLSWriteFlash(u32 wrtAddr, u8 *pDat, u32 len)
{
u8  times = 0;
u16 i;
u32 wrtDat = 0, reaDat = 0;                                              // 读写缓冲
u32 addr = wrtAddr;

FLASH_Unlock();                                                          // 解锁的闪存程序擦除控制器
for (i=0; i
{
      wrtDat = (pDat[i+0]<<0) + (pDat[i+1]<<8) + (pDat[i+2]<<16) + (pDat[i+3]<<24);

      do
      {
         times++;
         FLASH_ProgramWord(addr, wrtDat);                                  // 写Flash
         reaDat = FLSReadDword(addr);                                     // 读Flash

      } while ((reaDat != wrtDat) && (times < 5));

      if (times == 0)                                                       // 读写错误
      {
         FLASH_Lock();                                                    // 锁Flash
         return 1;
      }

      times = 0;
      addr += 4;                                                             // 偏移地址
}

FLASH_Lock();                                                             // 锁Flash
return 0;
}

只看该作者 · 2017-11-20 22:19

uint16_t Flash_Write_Without_check(uint32_t iAddress, uint8_t *buf, uint16_t iNumByteToWrite) {
uint16_t i;
volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;
i = 0;

// FLASH_UnlockBank1();
while((i < iNumByteToWrite) && (FLASHStatus == FLASH_COMPLETE))
{
   FLASHStatus = FLASH_ProgramHalfWord(iAddress, *(uint16_t*)buf);
   i = i+2;
   iAddress = iAddress + 2;
   buf = buf + 2;
}

return iNumByteToWrite;
}
/**
  * @brief  Programs a half word at a specified Option Byte Data address.
  * @NOTE This function can be used for all STM32F10x devices.
  * @param  Address: specifies the address to be programmed.
  * @param  buf: specifies the data to be programmed.
  * @param  iNbrToWrite: the number to write into flash
  * @retval if success return the number to write, -1 if error
  *
  */
int Flash_Write(uint32_t iAddress, uint8_t *buf, uint32_t iNbrToWrite) {
            /* Unlock the Flash Bank1 Program Erase controller */
      uint32_t secpos;
      uint32_t iNumByteToWrite = iNbrToWrite;
uint16_t secoff;
uint16_t secremain;
  uint16_t i = 0;
      uint8_t tmp[FLASH_PAGE_SIZE];

      FLASH_UnlockBank1();
secpos=iAddress & (~(FLASH_PAGE_SIZE -1 )) ;//扇区地址
secoff=iAddress & (FLASH_PAGE_SIZE -1);    //在扇区内的偏移
secremain=FLASH_PAGE_SIZE-secoff;          //扇区剩余空间大小
      volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;

      if(iNumByteToWrite<=secremain) secremain = iNumByteToWrite;//不大于4096个字节

      while( 1 ) {
         Flash_Read(secpos, tmp, FLASH_PAGE_SIZE); //读出整个扇区
         for(i=0;i<secremain;i++) {    //校验数据
   if(tmp[secoff+i]!=0XFF)break;    //需要擦除
}
         if(i<secremain) {  //需要擦除
            FLASHStatus = FLASH_ErasePage(secpos); //擦除这个扇区
            if(FLASHStatus != FLASH_COMPLETE)
               return -1;
            for(i=0;i<secremain;i++) { //复制
                     tmp[i+secoff]=buf;
            }
            Flash_Write_Without_check(secpos ,tmp ,FLASH_PAGE_SIZE);//写入整个扇区
         } else {
            Flash_Write_Without_check(iAddress,buf,secremain);//写已经擦除了的,直接写入扇区剩余区间.
         }

         if(iNumByteToWrite==secremain) //写入结束了
            break;
         else {
            secpos += FLASH_PAGE_SIZE;
            secoff = 0;//偏移位置为0
            buf += secremain;  //指针偏移
            iAddress += secremain;//写地址偏移
            iNumByteToWrite -= secremain;  //字节数递减
            if(iNumByteToWrite>FLASH_PAGE_SIZE) secremain=FLASH_PAGE_SIZE;//下一个扇区还是写不完
            else secremain = iNumByteToWrite;  //下一个扇区可以写完了
         }

      }

      FLASH_LockBank1();
      return iNbrToWrite;
}

/**
  * @brief  Programs a half word at a specified Option Byte Data address.
  * @note This function can be used for all STM32F10x devices.
  * @param  Address: specifies the address to be programmed.
  * @param  buf: specifies the data to be programmed.
  * @param  iNbrToWrite: the number to read from flash
  * @retval if success return the number to write, without error
  *
  */
int Flash_Read(uint32_t iAddress, uint8_t *buf, int32_t iNbrToRead) {
      int i = 0;
      while(i < iNbrToRead ) {
         *(buf + i) = *(__IO uint8_t*) iAddress++;
         i++;
      }
      return i;
}

-------------------DataFlash.h----------------------------------
#ifndef __DATAFLASH_H__
#define __DATAFLASH_H__

#include "stm32f10x.h"
#include "stm32f10x_flash.h"

#if defined (STM32F10X_HD) || defined (STM32F10X_HD_VL) || defined (STM32F10X_CL) || defined (STM32F10X_XL)
  #define FLASH_PAGE_SIZE ((uint16_t)0x800)

#else
  #define FLASH_PAGE_SIZE ((uint16_t)0x400)
#endif

int Flash_Read(uint32_t iAddress, uint8_t *buf, int32_t iNbrToRead) ;
int Flash_Write(uint32_t iAddress, uint8_t *buf, uint32_t iNbrToWrite);

#endif

只看该作者 · 2017-11-20 22:23

《stm32flash编程手册》去看看这个。

STM32Flash擦出和编写

技术领袖奖章

十世金身

坚毅之洋流

荣誉元老奖章