野火STM32 Flash&sd卡模拟U盘

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

 //mass_mal.c

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

 #include "..\User\sdcard\bsp_sdio_sdcard.h"

 #include "..\User\spi_flash\fatfs_flash_spi.h"

 #include "mass_mal.h"

 #include <stdio.h>

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

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

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

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

 uint32_t Mass_Memory_Size[];

 uint32_t Mass_Block_Size[];

 uint32_t Mass_Block_Count[];

 __IO uint32_t Status = ;

 //#define  sFLASH_ID              0xEF3015     //W25X16

 //#define  sFLASH_ID              0xEF4015     //W25Q16

 #define  sFLASH_ID              0XEF4017    //W25Q64

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

 /*******************************************************************************

 * Function Name  : MAL_Init

 * Description    : Initializes the Media on the STM32

 * Input          : None

 * Output         : None

 * Return         : None

 *******************************************************************************/

 uint16_t MAL_Init(uint8_t lun)

 {

   uint16_t status = MAL_OK;

   switch (lun)

   {

     case :

             FLASH_SPI_disk_initialize();

             if(SPI_FLASH_ReadID()==sFLASH_ID)

             {

                 printf("flash init succsee\n");

                 Status = MAL_OK;

             }

             else

                 Status = MAL_FAIL;

       break;

         case :

       Status = SD_Init();

       break;

     default:

       return MAL_FAIL;

   }

   return status;

 }

 /*******************************************************************************

 * Function Name  : MAL_Write

 * Description    : Write sectors

 * Input          : None

 * Output         : None

 * Return         : None

 *******************************************************************************/

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

 {

   switch (lun)

   {

     case :

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

             SPI_FLASH_SectorErase(Memory_Offset);

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

       break;

         case :

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

             Status = SD_WaitWriteOperation();

             while(SD_GetStatus() != SD_TRANSFER_OK);

       if ( Status != SD_OK )

       {

         return MAL_FAIL;

       }

       break;

     default:

       return MAL_FAIL;

   }

   return MAL_OK;

 }

 /*******************************************************************************

 * Function Name  : MAL_Read

 * Description    : Read sectors

 * 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)

 {

   switch (lun)

   {

     case :

             Memory_Offset+=(*);//扇区偏移             //printf("read add =%d.length=%d\n",Memory_Offset/4096,Transfer_Length/4096);

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

       break;

         case :

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

             Status = SD_WaitReadOperation();

       while(SD_GetStatus() != SD_TRANSFER_OK)

       {

       }

       if ( Status != SD_OK )

       {

         return MAL_FAIL;

       }

       break;

     default:

       return MAL_FAIL;

   }

   return MAL_OK;

 }

 /*******************************************************************************

 * Function Name  : MAL_GetStatus

 * Description    : Get status

 * Input          : None

 * Output         : None

 * Return         : None

 *******************************************************************************/

 uint16_t MAL_GetStatus (uint8_t lun)

 {

   uint32_t DeviceSizeMul = , NumberOfBlocks = ;

     switch (lun)

   {

     case :

         {

             FLASH_SPI_disk_initialize();

             if(SPI_FLASH_ReadID()==sFLASH_ID)

             {

                 Mass_Block_Size[]  =;

                 Mass_Block_Count[] =;

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

                 return MAL_OK;

             }

         }

         case :

             if (SD_Init() == SD_OK)

             {

                 SD_GetCardInfo(&SDCardInfo);

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

                 DeviceSizeMul = (SDCardInfo.SD_csd.DeviceSizeMul + );

                 if(SDCardInfo.CardType == SDIO_HIGH_CAPACITY_SD_CARD)

                 {

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

                 }

                 else

                 {

                     NumberOfBlocks  = (( << (SDCardInfo.SD_csd.RdBlockLen)) / );

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

                 }

                 Mass_Block_Size[]  = ;

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

                 Status = SD_EnableWideBusOperation(SDIO_BusWide_4b);

                 if ( Status != SD_OK )

                 {

                     return MAL_FAIL;

                 }

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

                 return MAL_OK;

             }

         default:break;

     }

   return MAL_FAIL;

 }