野火STM32 Flash&sd卡模拟U盘

2020-10-16 来源：eefocus

在USB库文件mass_mal.c中添加对flash和sd读写的函数，USB库调用这些函数从而实现模拟U盘的功能

1 //mass_mal.c

2 /* Includes ------------------------------------------------------------------*/

3 #include '..Usersdcardbsp_sdio_sdcard.h'

4 #include '..Userspi_flashfatfs_flash_spi.h'

5 #include 'mass_mal.h'

6 #include

7 /* Private typedef -----------------------------------------------------------*/

8 /* Private define ------------------------------------------------------------*/

9 /* Private macro -------------------------------------------------------------*/

10 /* Private variables ---------------------------------------------------------*/

11 uint32_t Mass_Memory_Size[2];

12 uint32_t Mass_Block_Size[2];

13 uint32_t Mass_Block_Count[2];

14 __IO uint32_t Status = 0;

15 //#define sFLASH_ID 0xEF3015 //W25X16

16 //#define sFLASH_ID 0xEF4015 //W25Q16

17 #define sFLASH_ID 0XEF4017 //W25Q64

18 extern SD_CardInfo SDCardInfo; //ÓÃÓÚ´æ´¢¿¨µÄÐÅÏ¢

1 /*******************************************************************************

2 * Function Name : MAL_Init

3 * Description : Initializes the Media on the STM32

4 * Input : None

5 * Output : None

6 * Return : None

7 *******************************************************************************/

8 uint16_t MAL_Init(uint8_t lun)

9 {

10 uint16_t status = MAL_OK;

12 switch (lun)

13 {

14 case 0:

15 FLASH_SPI_disk_initialize();

16 if(SPI_FLASH_ReadID()==sFLASH_ID)

17 {

18 printf('flash init succseen');

19 Status = MAL_OK;

20 }

21 else

22 Status = MAL_FAIL;

23 break;

24 case 1:

25 Status = SD_Init();

26 break;

27 default:

28 return MAL_FAIL;

29 }

30 return status;

31 }

1 /*******************************************************************************

2 * Function Name : MAL_Write

3 * Description : Write sectors

4 * Input : None

5 * Output : None

6 * Return : None

7 *******************************************************************************/

8 uint16_t MAL_Write(uint8_t lun, uint32_t Memory_Offset, uint32_t *Writebuff, uint16_t Transfer_Length)

9 {

10 switch (lun)

11 {

12 case 0:

13 Memory_Offset+=(512*4096);//扇区偏移，外部flash文件系统空间放在外部flash 6M空间14 //printf('write add =%d.length=%dn',Memory_Offset/4096,Transfer_Length/4096);

15 SPI_FLASH_SectorErase(Memory_Offset);

16 SPI_FLASH_BufferWrite((uint8_t *)Writebuff,Memory_Offset,Transfer_Length);

17 break;

18 case 1:

19 Status = SD_WriteBlock((uint8_t*)Writebuff, Memory_Offset, Transfer_Length);

20 Status = SD_WaitWriteOperation();

21 while(SD_GetStatus() != SD_TRANSFER_OK);

22 if ( Status != SD_OK )

23 {

24 return MAL_FAIL;

25 }

26 break;

27 default:

28 return MAL_FAIL;

29 }

30 return MAL_OK;

31 }

1 /*******************************************************************************

2 * Function Name : MAL_Read

3 * Description : Read sectors

4 * Input : None

5 * Output : None

6 * Return : Buffer pointer

7 *******************************************************************************/

8 uint16_t MAL_Read(uint8_t lun, uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length)

9 {

11 switch (lun)

12 {

13 case 0:

14 Memory_Offset+=(512*4096);//扇区偏移15 //printf('read add =%d.length=%dn',Memory_Offset/4096,Transfer_Length/4096);

16 SPI_FLASH_BufferRead((uint8_t *)Readbuff, Memory_Offset, Transfer_Length);

17 break;

19 case 1:

20 SD_ReadBlock((uint8_t*)Readbuff, Memory_Offset, Transfer_Length);

21 Status = SD_WaitReadOperation();

22 while(SD_GetStatus() != SD_TRANSFER_OK)

23 {

24 }

25 if ( Status != SD_OK )

26 {

27 return MAL_FAIL;

28 }

29 break;

30 default:

31 return MAL_FAIL;

32 }

33 return MAL_OK;

34 }

1 /*******************************************************************************

2 * Function Name : MAL_GetStatus

3 * Description : Get status

4 * Input : None

5 * Output : None

6 * Return : None

7 *******************************************************************************/

8 uint16_t MAL_GetStatus (uint8_t lun)

9 {

10 uint32_t DeviceSizeMul = 0, NumberOfBlocks = 0;

11 switch (lun)

12 {

13 case 0:

14 {

15 FLASH_SPI_disk_initialize();

16 if(SPI_FLASH_ReadID()==sFLASH_ID)

17 {

18 Mass_Block_Size[0] =4096;

19 Mass_Block_Count[0] =1536;

20 Mass_Memory_Size[0] =Mass_Block_Size[0]*Mass_Block_Count[0];

21 return MAL_OK;

22 }

23 }

24 case 1:

25 if (SD_Init() == SD_OK)

26 {

27 SD_GetCardInfo(&SDCardInfo);

28 SD_SelectDeselect((uint32_t) (SDCardInfo.RCA << 16));

29 DeviceSizeMul = (SDCardInfo.SD_csd.DeviceSizeMul + 2);

31 if(SDCardInfo.CardType == SDIO_HIGH_CAPACITY_SD_CARD)

32 {

33 Mass_Block_Count[1] = (SDCardInfo.SD_csd.DeviceSize + 1) * 1024;

34 }

35 else

36 {

37 NumberOfBlocks = ((1 << (SDCardInfo.SD_csd.RdBlockLen)) / 512);

38 Mass_Block_Count[1] = ((SDCardInfo.SD_csd.DeviceSize + 1) * (1 << DeviceSizeMul) << (NumberOfBlocks/2));

39 }

40 Mass_Block_Size[1] = 512;

42 Status = SD_SelectDeselect((uint32_t) (SDCardInfo.RCA << 16));

43 Status = SD_EnableWideBusOperation(SDIO_BusWide_4b);

44 if ( Status != SD_OK )

45 {

46 return MAL_FAIL;

47 }

49 Mass_Memory_Size[1] = Mass_Block_Count[1] * Mass_Block_Size[1];

50 return MAL_OK;

51 }

52 default:break;

53 }

54 return MAL_FAIL;

55 }

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野火 STM32 Flash&sd卡模拟U盘

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