STM32 USB SD卡讀卡器和NAND FLASH模擬U盤
本次工程是要同時(shí)實(shí)現(xiàn)SD卡讀卡器和NAND Flash模擬U盤的功能。結(jié)合之前的兩個工程，稍稍修改下就可以了。
既然要實(shí)現(xiàn)兩個盤，當(dāng)然在usb_prop.c中的Max_Lun變量賦值為1，在USB_User組中同時(shí)添加fsmc_nand.c和sdio_sdcard.c這兩個文件，在外設(shè)庫中挺尸添加stm32f10x_sdio.c和stm32f10x_fsmc.c兩個文件。
添加完之后，可能會有些許的錯誤，解決完后，我們就要修改下mass_mal.c文件了，這個文件本次要同時(shí)實(shí)現(xiàn)SD卡和NAND Flash的相關(guān)驅(qū)動代碼的掛接，代碼如下：
uint32_t Mass_Memory_Size[2];
uint32_t Mass_Block_Size[2];
uint32_t Mass_Block_Count[2];
__IO uint32_t Status = 0;
uint16_t MAL_Init(uint8_t lun)
{
u16 status = MAL_OK;
switch (lun)
{
case 0:
Status = SD_Init(); //調(diào)用SD初始化函數(shù)
break;
case 1:
FlashInit();
break;
default:
return MAL_FAIL;
}
return status;
}
uint16_t MAL_Write(uint8_t lun, uint32_t Memory_Offset, uint32_t *Writebuff, uint16_t Transfer_Length)
{
switch (lun)
{
case 0:
Status = SD_WriteBlock((uint8_t*)Writebuff, Memory_Offset, Transfer_Length);
SD_WaitWriteOperation(); //等待dma傳輸結(jié)束
while(SD_GetStatus() != SD_TRANSFER_OK); //等待sdio到sd卡傳輸結(jié)束
if ( Status != SD_OK )
{
return MAL_FAIL;
}
break;
case 1:
FlashWriteOneSector(Memory_Offset,(u8*)Writebuff, Transfer_Length);
break;
default:
return MAL_FAIL;
}
return MAL_OK;
}
uint16_t MAL_Read(uint8_t lun, uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length)
{
switch (lun)
{
case 0:
Status = SD_ReadBlock((uint8_t*)Readbuff, Memory_Offset, Transfer_Length);
SD_WaitReadOperation(); //等待dma傳輸結(jié)束
while(SD_GetStatus() != SD_TRANSFER_OK); //等待sdio到sd卡傳輸結(jié)束
if ( Status != SD_OK )
{
return MAL_FAIL;
}
break;
case 1:
FlashReadOneSector(Memory_Offset, (u8*)Readbuff, Transfer_Length);
break;
default:
return MAL_FAIL;
}
return MAL_OK;
}
uint16_t MAL_GetStatus (uint8_t lun)
{
uint32_t DeviceSizeMul = 0, NumberOfBlocks = 0;
if (lun == 0)
{
if (SD_Init() == SD_OK)
{
SD_GetCardInfo(&SDCardInfo);
SD_SelectDeselect((uint32_t) (SDCardInfo.RCA << 16));
DeviceSizeMul = (SDCardInfo.SD_csd.DeviceSizeMul + 2);
if(SDCardInfo.CardType == SDIO_HIGH_CAPACITY_SD_CARD)
{
Mass_Block_Count[0] = (SDCardInfo.SD_csd.DeviceSize + 1) * 1024;
}
else
{
NumberOfBlocks = ((1 << (SDCardInfo.SD_csd.RdBlockLen)) / 512);
Mass_Block_Count[0] = ((SDCardInfo.SD_csd.DeviceSize + 1) * (1 << DeviceSizeMul) << (NumberOfBlocks/2));
}
Mass_Block_Size[0] = 512;
Status = SD_SelectDeselect((uint32_t) (SDCardInfo.RCA << 16));
Status = SD_EnableWideBusOperation(SDIO_BusWide_4b);
if ( Status != SD_OK )
{
return MAL_FAIL;
}
LED2_ON();
return MAL_OK;
}
else
{
LED2_OFF();
}
}
else
{
Mass_Block_Count[1] = FLASH_MAX_SECTOR_ADDR/FLASH_SECTOR_SIZE; //NAND_ZONE_SIZE * NAND_BLOCK_SIZE * NAND_MAX_ZONE ;
Mass_Block_Size[1] = FLASH_SECTOR_SIZE; //NAND_PAGE_SIZE;
Mass_Memory_Size[1] = (Mass_Block_Count[1] * Mass_Block_Size[1]);//這里的NAND要選擇Mass_Block_Count[1]和Mass_Block_Size[1]
LED4_ON(); //因?yàn)镾D的的是Mass_Block_Count[0]和Mass_Block_Size[0]
return MAL_OK;
}
return MAL_FAIL;
}
這樣就可以在電腦上同時(shí)出現(xiàn)兩個盤，分別是SD卡和NAND模擬出來的。
在調(diào)是這個代碼之前，曾經(jīng)粗心，把MAL_GetStatus()l里的NAND相關(guān)代碼的下成如下：
Mass_Block_Count[0] = FLASH_MAX_SECTOR_ADDR/FLASH_SECTOR_SIZE;
Mass_Block_Size[0] = FLASH_SECTOR_SIZE;
Mass_Memory_Size[0] = (Mass_Block_Count[0] * Mass_Block_Size[0]);
數(shù)組元素都是0，與SD卡沖突，導(dǎo)致兩個盤都顯示不出來，但是你屏蔽掉SD相關(guān)的代碼是可以的，或則屏蔽掉NAND相關(guān)代碼也是可以的，偏偏兩個代碼一起的時(shí)候不行，檢查了半天，才發(fā)現(xiàn)問題出在這里。
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