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 "..Usersdcardsp_sdio_sdcard.h" 4 #include "..Userspi_flashfatfs_flash_spi.h" 5 #include "mass_mal.h" 6 #include <stdio.h> 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; 11 12 switch (lun) 13 { 14 case 0: 15 FLASH_SPI_disk_initialize(); 16 if(SPI_FLASH_ReadID()==sFLASH_ID) 17 { 18 printf("flash init succsee "); 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=%d ",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 { 10 11 switch (lun) 12 { 13 case 0: 14 Memory_Offset+=(512*4096);//扇区偏移15 //printf("read add =%d.length=%d ",Memory_Offset/4096,Transfer_Length/4096); 16 SPI_FLASH_BufferRead((uint8_t *)Readbuff, Memory_Offset, Transfer_Length); 17 break; 18 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); 30 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; 41 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 } 48 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 }