diskio.c

基于S3C2440处理器的sd卡驱动程序

#include "sd_extr.h"
#include "diskio.h"
#include "fs_extr.h"

extern sd_struct sds;
DSTATUS disk_initialize (void)
{
	if( SD_NO_ERR == SD_Initialize(&sds))
	{
		return RES_OK;
	}
	return RES_NOTRDY;
}

DSTATUS disk_shutdown (void)
{
	return RES_OK;
}

DSTATUS disk_status (void)
{
	return RES_OK;
}

DRESULT disk_read (BYTE *buf,  DWORD sect , BYTE num)
{
	
	if( num ==  1)
	{
		if ( SD_NO_ERR == SD_ReadBlock(&sds, sect, buf) )
		{	
			return RES_OK;
		}
	}
	else if ( num > 1 )
	{
		if ( SD_NO_ERR == SD_ReadBlock_1(&sds, sect, num, buf) )
		{
			return RES_OK;
		}
	}
	return RES_ERROR;
}
#ifndef	_READONLY
DRESULT disk_write (const BYTE *buf , DWORD sect , BYTE num)
{

	if( num == 1)
	{
		if( SD_NO_ERR == SD_WriteBlock(&sds, sect, buf) )
		{
			return RES_OK;
		}
	}
	else if ( num > 1)
	{
		if( SD_NO_ERR == SD_WriteBlock_1(&sds, sect,  num,buf) )
		{
			return RES_OK;
		}
	}
	return RES_ERROR;
}
#endif
/*
DRESULT disk_ioctl (BYTE, void*)
{
}
void	disk_timerproc ()
{
}*/