#define FLASH_START_ADDR 0x08016000 // Flash start address #define FLASH_SIZE 0x64000 // 400K 的U盤 #define FLASH_PAGE_SIZE 0x800 // 2k Bytes per page,只有2K才能格式化 #define FLASH_WAIT_TIMEOUT 100000 //操做等待時間數組
而後要編寫MAL_Init()、MAL_Write()、MAL_Read()、MAL_GetStatus()這裏很少作介紹,貼出代碼:#include "mass_mal.h"函數
#define FLASH_START_ADDR 0x08016000 // Flash start address #define FLASH_SIZE 0x64000 // 400K 的U盤 #define FLASH_PAGE_SIZE 0x800 // 2k Bytes per page,只有2K才能格式化 #define FLASH_WAIT_TIMEOUT 100000 /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ uint32_t Mass_Memory_Size[2]; uint32_t Mass_Block_Size[2]; uint32_t Mass_Block_Count[2]; __IO uint32_t Status = 0; /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : MAL_Init * Description : 初始化STM32的媒體設備 * Input : lun * Output : None * Return : None *******************************************************************************/ uint16_t MAL_Init(uint8_t lun) { u16 status = MAL_OK; switch (lun) { case 0: FLASH_Unlock(); break; default: return MAL_FAIL; } return status; } /******************************************************************************* * Function Name : MAL_Write * Description : 寫扇區 * Input : None * Output : None * Return : None *******************************************************************************/ uint16_t MAL_Write(uint8_t lun, uint32_t Memory_Offset, uint32_t *Writebuff, uint16_t Transfer_Length) { uint16_t i; switch (lun) { case 0: for(i=0;i<Transfer_Length;i+=FLASH_PAGE_SIZE) { if(FLASH_WaitForLastOperation(FLASH_WAIT_TIMEOUT)!=FLASH_TIMEOUT) { FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR|FLASH_FLAG_WRPRTERR); } FLASH_ErasePage(FLASH_START_ADDR + Memory_Offset + i); } for(i=0;i<Transfer_Length;i+=4) { if(FLASH_WaitForLastOperation(FLASH_WAIT_TIMEOUT)!=FLASH_TIMEOUT) { FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR| FLASH_FLAG_WRPRTERR); } FLASH_ProgramWord(FLASH_START_ADDR + Memory_Offset + i , Writebuff[i>>2]); } break; default: return MAL_FAIL; } return MAL_OK; } /******************************************************************************* * Function Name : MAL_Read * Description : 讀取扇區 * Input : None * Output : None * Return : Buffer pointer *******************************************************************************/ uint16_t MAL_Read(uint8_t lun, uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length) { uint16_t i; switch (lun) { case 0: for(i=0;i<Transfer_Length;i+=4) { Readbuff[i>>2] = ((vu32*)(FLASH_START_ADDR + Memory_Offset))[i>>2]; } break; default: return MAL_FAIL; } return MAL_OK; } /******************************************************************************* * Function Name : MAL_GetStatus * Description : 獲取狀態 * Input : None * Output : None * Return : None *******************************************************************************/ uint16_t MAL_GetStatus (uint8_t lun) { if (lun == 0) { Mass_Block_Count[0] = FLASH_SIZE/FLASH_PAGE_SIZE; Mass_Block_Size[0] = FLASH_PAGE_SIZE; Mass_Memory_Size[0] = FLASH_SIZE; LED2_ON(); return MAL_OK; } LED2_OFF();ui
return MAL_FAIL; } spa