/*-----------------------------------------------------------------------*/

/* Low level disk I/O module SKELETON for FatFs     (C)ChaN, 2019        */

/*-----------------------------------------------------------------------*/

/* If a working storage control module is available, it should be        */

/* attached to the FatFs via a glue function rather than modifying it.   */

/* This is an example of glue functions to attach various exsisting      */

/* storage control modules to the FatFs module with a defined API.       */

/*-----------------------------------------------------------------------*/

#include "ff.h"			/* Obtains integer types */

#include "diskio.h"		/* Declarations of disk functions */

#include "SPI_SD.h"

#include "uart.h"

/* Definitions of physical drive number for each drive */

#define DEV_RAM		0	/* Example: Map Ramdisk to physical drive 0 */

#define DEV_MMC		1	/* Example: Map MMC/SD card to physical drive 1 */

#define DEV_USB		2	/* Example: Map USB MSD to physical drive 2 */

/*-----------------------------------------------------------------------*/

/* Get Drive Status                                                      */

/*-----------------------------------------------------------------------*/

DSTATUS disk_status (

	BYTE pdrv		/* Physical drive nmuber to identify the drive */

)

{

	DSTATUS stat = 0;

//	int result;

	switch (pdrv) {

	case DEV_RAM :

//		result = RAM_disk_status();

		// translate the reslut code here

		return stat;

	case DEV_MMC :

//		result = MMC_disk_status();

		// translate the reslut code here

		return stat;

	case DEV_USB :

//		result = USB_disk_status();

		// translate the reslut code here

		return stat;

	}

	return STA_NOINIT;

}

/*-----------------------------------------------------------------------*/

/* Inidialize a Drive                                                    */

/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize (

	BYTE pdrv				/* Physical drive nmuber to identify the drive */

)

{

	DSTATUS stat = 0;

//	int result;

	switch (pdrv) {

	case DEV_RAM :

//		result = RAM_disk_initialize();

		// translate the reslut code here

		stat = SD_Init();

		if(stat)return  STA_NOINIT;

		else return stat;

	case DEV_MMC :

//		result = MMC_disk_initialize();

		// translate the reslut code here

		return stat;

	case DEV_USB :

//		result = USB_disk_initialize();

		// translate the reslut code here

		return stat;

	}

	return STA_NOINIT;

}

/*-----------------------------------------------------------------------*/

/* Read Sector(s)                                                        */

/*-----------------------------------------------------------------------*/

DRESULT disk_read (

	BYTE pdrv,		/* Physical drive nmuber to identify the drive */

	BYTE *buff,		/* Data buffer to store read data */

	LBA_t sector,	/* Start sector in LBA */

	UINT count		/* Number of sectors to read */

)

{

	DRESULT res = 0;

//	int result;

	switch (pdrv) {

	case DEV_RAM :

    if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误		 	 

	if(pdrv==0)

	{

		  res=SD_ReadMultiBlock(buff,sector,count);

			while(res)//读出错

			{

				SD_Init();	//重新初始化SD卡

				res=SD_ReadMultiBlock(buff,sector,count);

				//printf("sd rd error:%d\r\n",res);

			}

	}

	else

		res = 1;

   //处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值

    if(res==0x00)return RES_OK;	 

    else return RES_ERROR;

	case DEV_MMC :

		// translate the arguments here

//		result = MMC_disk_read(buff, sector, count);

		// translate the reslut code here

		return res;

	case DEV_USB :

		// translate the arguments here

//		result = USB_disk_read(buff, sector, count);

		// translate the reslut code here

		return res;

	}

	return RES_PARERR;

}

/*-----------------------------------------------------------------------*/

/* Write Sector(s)                                                       */

/*-----------------------------------------------------------------------*/

#if FF_FS_READONLY == 0

DRESULT disk_write (

	BYTE pdrv,			/* Physical drive nmuber to identify the drive */

	const BYTE *buff,	/* Data to be written */

	LBA_t sector,		/* Start sector in LBA */

	UINT count			/* Number of sectors to write */

)

{

	DRESULT res = 0;

//	int result;

	switch (pdrv) {

	case DEV_RAM :

    if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误		 	 

	if(pdrv==0)

	{

			res=SD_WriteMultiBlock((u8*)buff,sector,count);

			while(res)//写出错

			{

				SD_Init();	//重新初始化SD卡

				res=SD_WriteMultiBlock((u8*)buff,sector,count);	

				printf("sd wr error:%d\r\n",res);

			}

	}

	else 

		res = 1;

    //处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值

    if(res == 0x00)return RES_OK;	 

    else return RES_ERROR;

	case DEV_MMC :

		// translate the arguments here

//		result = MMC_disk_write(buff, sector, count);

		// translate the reslut code here

		return res;

	case DEV_USB :

		// translate the arguments here

//		result = USB_disk_write(buff, sector, count);

		// translate the reslut code here

		return res;

	}

	return RES_PARERR;

}

#endif

/*-----------------------------------------------------------------------*/

/* Miscellaneous Functions                                               */

/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl (

	BYTE pdrv,		/* Physical drive nmuber (0..) */

	BYTE cmd,		/* Control code */

	void *buff		/* Buffer to send/receive control data */

)

{

	DRESULT res;

//	int result;

	switch (pdrv) {

	case DEV_RAM :

	{

		switch(cmd)

		{

			case CTRL_SYNC:

				res = RES_OK; 

				break;	 

			case GET_SECTOR_SIZE:

				*(DWORD*)buff = 512; 

				res = RES_OK;

				break;	 

			case GET_BLOCK_SIZE:

				*(WORD*)buff = 512*8;//SDCardInfo.CardBlockSize;

				res = RES_OK;

				break;	 

			case GET_SECTOR_COUNT:

				*(DWORD*)buff = (u32)SD_GetCapacity*1024*1024/512;

				res = RES_OK;

				break;

			default:

				res = RES_PARERR;

				break;

		}

	}return res;

	case DEV_MMC :

		// Process of the command for the MMC/SD card

		return res;

	case DEV_USB :

		// Process of the command the USB drive

		return res;

	}

	return RES_PARERR;

}

DWORD get_fattime (void)

{

    return 0;

}