diskio.c

LPC1788的USBHOST的FATFS移植

/****************************************Copyright (c)****************************************************
**                                      
**                                 http://www.powermcu.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:               diskio.c
** Descriptions:            The FATFS Diskio
**
**--------------------------------------------------------------------------------------------------------
** Created by:              AVRman
** Created date:            2010-11-4
** Version:                 v1.0
** Descriptions:            The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
** Version:                 
** Descriptions:            
**
*********************************************************************************************************/

/* Includes ------------------------------------------------------------------*/
#include "diskio.h"
#include  "usbhost_ms.h"

/* Private variables ---------------------------------------------------------*/
	uint32_t  numBlks, blkSize;
	uint8_t  inquiryResult[INQUIRY_LENGTH];

DSTATUS disk_initialize (
	BYTE drv				/* Physical drive nmuber (0..) */
)
{
 int Status;
	
 switch (drv) 
 {
	case 0 :
	  
//    Status = MSD_Init();
    Status = MS_Init( &blkSize, &numBlks, inquiryResult );
    if(Status == 0)
	  return 0;
    else 
	  return STA_NOINIT;
	
	case 1 :	  
		return STA_NOINIT;
		  
	case 2 :
		return STA_NOINIT;
  }
	return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Return Disk Status                                                    */

DSTATUS disk_status (
	BYTE drv		/* Physical drive nmuber (0..) */
)
{
    switch (drv) 
	{
	  case 0 :
		
	  /* translate the reslut code here	*/

	    return 0;

	  case 1 :
	
	  /* translate the reslut code here	*/

	    return 0;

	  case 2 :
	
	  /* translate the reslut code here	*/

	    return 0;

	  default:

        break;
	}
	return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */

DRESULT disk_read (
	BYTE drv,		/* Physical drive nmuber (0..) */
	BYTE *buff,		/* Data buffer to store read data */
	DWORD sector,	/* Sector address (LBA) */
	BYTE count		/* Number of sectors to read (1..255) */
)
{
  int Status;
  if( !count )
  {    
    return RES_PARERR;  /* count不能等于0，否则返回参数错误 */
  }

  switch (drv)
  {

    case 0:
    if(count==1)            /* 1个sector的读操作 */      
    {       
	  Status =  MS_BulkRecv(sector, 1, buff);

    }                                                
    else                    /* 多个sector的读操作 */     
    {   
//      Status = MSD_ReadMultiBlock( sector , buff ,count);
    }                                                
    if(Status == 0)
    {
      return RES_OK;
    }
    else
    {
      return RES_ERROR;
    }
    
	case 1:	
	  break;

    case 2:	
	  break;

    default:
      break;

  }
  
  return RES_ERROR;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */

#if _READONLY == 0
DRESULT disk_write (
	BYTE drv,			/* Physical drive nmuber (0..) */
	const BYTE *buff,	        /* Data to be written */
	DWORD sector,		/* Sector address (LBA) */
	BYTE count			/* Number of sectors to write (1..255) */
)
{
  int Status;
  if( !count )
  {    
    return RES_PARERR;  /* count不能等于0，否则返回参数错误 */
  }

  switch (drv)
  {
    case 0:
    if(count==1)            /* 1个sector的写操作 */      
    {   
	  Status =  MS_BulkSend(sector, 1, (void*)buff);
    }                                                
    else                    /* 多个sector的写操作 */    
    {   
//       Status = MSD_WriteMultiBlock( sector , (uint8_t *)(&buff[0]) , count );	  
    }                                                
    if(Status == 0)
    {
       return RES_OK;
    }
    else
    {
       return RES_ERROR;
    }
    case 2:
	   break;
    default :
       break;
  }
 return RES_ERROR;
}
#endif /* _READONLY */



/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */

DRESULT disk_ioctl (
	BYTE drv,		/* Physical drive nmuber (0..) */
	BYTE ctrl,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
    if (drv)
    {    
        return RES_PARERR;  /* 仅支持单磁盘操作，否则返回参数错误 */
    }				  

//	MSD_GetCardInfo(&CardInfo);

	switch (ctrl) 
	{
	  case CTRL_SYNC :
	      
		return RES_OK;

	  case GET_SECTOR_COUNT : 
	    *(DWORD*)buff = numBlks;
	    return RES_OK;

	  case GET_BLOCK_SIZE :
	    *(WORD*)buff = blkSize;
	    return RES_OK;	

	  case CTRL_POWER :
		break;

	  case CTRL_LOCK :
		break;

	  case CTRL_EJECT :
		break;

      /* MMC/SDC command */
	  case MMC_GET_TYPE :
		break;

	  case MMC_GET_CSD :
		break;

	  case MMC_GET_CID :
		break;

	  case MMC_GET_OCR :
		break;

	  case MMC_GET_SDSTAT :
		break;	
	}
	return RES_PARERR;   
}

/* 得到文件Calendar格式的建立日期,是DWORD get_fattime (void) 逆变换 */							
/*-----------------------------------------------------------------------*/
/* User defined function to give a current time to fatfs module          */
/* 31-25: Year(0-127 org.1980), 24-21: Month(1-12), 20-16: Day(1-31) */                                                                                                                                                                                                                                          
/* 15-11: Hour(0-23), 10-5: Minute(0-59), 4-0: Second(0-29 *2) */                                                                                                                                                                                                                                                
DWORD get_fattime (void)
{
   
    return 0;
}



/*********************************************************************************************************
      END FILE
*********************************************************************************************************/