200 lines
4.9 KiB
C
200 lines
4.9 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include "diskio.h" /* FatFs lower layer API */
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#include "sdio_sd.h"
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#include "stdlib.h"
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#include "string.h"
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#define SD_Card 0 //SD¿¨
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#define SPI_Flash 1 //SPI Flash
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#define SD_BLOCKSIZE 512
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extern SD_CardInfo SDCardInfo;
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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DSTATUS stat = STA_NOINIT;
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switch (pdrv) {
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case SD_Card :
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stat &= ~STA_NOINIT;
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return stat;
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case SPI_Flash :
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return stat;
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}
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return STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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DSTATUS stat = STA_NOINIT;
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switch (pdrv) {
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case SD_Card :
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if( SD_Init()==SD_OK ) //SD¿¨³õʼ»¯
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{
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stat &= ~STA_NOINIT;
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return stat;
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}
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case SPI_Flash :
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return stat;
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}
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return STA_NOINIT;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to read */
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)
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{
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SD_Error SD_state = SD_OK;
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BYTE *pbuff=buff;
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if ((u32)pbuff&0x3)
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{
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pbuff=malloc(SD_BLOCKSIZE*count);
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}
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switch (pdrv) {
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case SD_Card:
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SD_state=SD_ReadMultiBlocks(pbuff,(uint64_t)sector*SD_BLOCKSIZE,SD_BLOCKSIZE,count);
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if(SD_state==SD_OK)
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{
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SD_state=SD_WaitReadOperation();
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while(SD_GetStatus() != SD_TRANSFER_OK);
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}
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if (pbuff!=buff)
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{
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memcpy(buff,pbuff,SD_BLOCKSIZE*count);
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free(pbuff);
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}
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if(SD_state==SD_OK)
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return RES_OK;
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else
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return RES_PARERR;
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case SPI_Flash :
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return RES_PARERR;
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}
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return RES_PARERR;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_write (
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BYTE pdrv, /* Physical drive nmuber to identify the drive */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Start sector in LBA */
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UINT count /* Number of sectors to write */
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)
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{
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SD_Error SD_state = SD_OK;
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switch (pdrv) {
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case SD_Card:
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SD_state=SD_WriteMultiBlocks((uint8_t *)buff,(uint64_t)sector*SD_BLOCKSIZE,SD_BLOCKSIZE,count);
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if(SD_state==SD_OK)
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{
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SD_state=SD_WaitWriteOperation();
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while(SD_GetStatus() != SD_TRANSFER_OK);
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if(SD_state==SD_OK)
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return RES_OK;
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else
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return RES_PARERR;
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}
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case SPI_Flash :
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return RES_PARERR;
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}
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return RES_PARERR;
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}
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_ioctl (
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BYTE pdrv, /* Physical drive nmuber (0..) */
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BYTE cmd, /* Control code */
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void *buff /* Buffer to send/receive control data */
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)
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{
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DRESULT res = RES_PARERR;
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switch (pdrv) {
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case SD_Card :
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switch (cmd)
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{
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case GET_SECTOR_COUNT:
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*(DWORD * )buff = SDCardInfo.CardCapacity/SD_BLOCKSIZE;
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break;
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// Get R/W sector size (WORD)
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case GET_SECTOR_SIZE :
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*(WORD * )buff = SD_BLOCKSIZE;
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break;
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// Get erase block size in unit of sector (DWORD)
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case GET_BLOCK_SIZE :
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*(DWORD * )buff = SD_BLOCKSIZE;
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break;
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}
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return RES_OK;
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case SPI_Flash :
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return res;
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}
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return RES_PARERR;
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}
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/*-----------------------------------------------------------------------*/
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/* ʱ¼ä»ñÈ¡º¯Êý£¬ÔÚÕâÀﲻʹÓ㬷µ»Ø0 */
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/*-----------------------------------------------------------------------*/
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DWORD get_fattime(void) {
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return 0;
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}
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