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;
 }