192 lines
4.4 KiB
C
192 lines
4.4 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 "sdmmc_sdcard.h"
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#include "w25qxx.h"
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#include "malloc.h"
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//////////////////////////////////////////////////////////////////////////////////
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/****************************************************************/
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//FATFS底层(diskio) 驱动代码
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//STM32H7工程模板-HAL库函数版本
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//DevEBox 大越创新
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//淘宝店铺：mcudev.taobao.com
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//淘宝店铺：shop389957290.taobao.com
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/****************************************************************/
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//////////////////////////////////////////////////////////////////////////////////
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#define SD_CARD 0 //SD卡,卷标为0
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#define EX_FLASH 1 //外部spi flash,卷标为1
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//对于W25Q256
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//前25M字节给fatfs用,25M字节后,用于存放字库,字库占用6.01M. 剩余部分,给客户自己用
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#define SPI_FLASH_SECTOR_SIZE 512
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#define SPI_FLASH_SECTOR_COUNT 1024*25*2 //W25Q256,前25M字节给FATFS占用
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#define SPI_FLASH_BLOCK_SIZE 8 //每个BLOCK有8个扇区
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//获得磁盘状态
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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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return RES_OK;
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}
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//初始化磁盘
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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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u8 res=0;
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switch(pdrv)
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{
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case SD_CARD: //SD卡
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res=SD_Init(); //SD卡初始化
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break;
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default:
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res=1;
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}
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if(res)return STA_NOINIT;
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else return 0; //初始化成功
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}
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//读扇区
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//pdrv:磁盘编号0~9
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//*buff:数据接收缓冲首地址
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//sector:扇区地址
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//count:需要读取的扇区数
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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, /* Sector address 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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u8 res=0;
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if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误
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switch(pdrv)
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{
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case SD_CARD://SD卡
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res=SD_ReadDisk(buff,sector,count);
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while(res)//读出错
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{
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SD_Init(); //重新初始化SD卡
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res=SD_ReadDisk(buff,sector,count);
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//printf("sd rd error:%d\r\n",res);
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}
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break;
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default:
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res=1;
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}
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//处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值
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if(res==0x00)return RES_OK;
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else return RES_ERROR;
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}
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//写扇区
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//pdrv:磁盘编号0~9
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//*buff:发送数据首地址
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//sector:扇区地址
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//count:需要写入的扇区数
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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, /* Sector address 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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u8 res=0;
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if (!count)return RES_PARERR;//count不能等于0，否则返回参数错误
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switch(pdrv)
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{
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case SD_CARD://SD卡
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res=SD_WriteDisk((u8*)buff,sector,count);
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while(res)//写出错
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{
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SD_Init(); //重新初始化SD卡
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res=SD_WriteDisk((u8*)buff,sector,count);
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//printf("sd wr error:%d\r\n",res);
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}
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break;
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default:
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res=1;
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}
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//处理返回值，将SPI_SD_driver.c的返回值转成ff.c的返回值
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if(res == 0x00)return RES_OK;
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else return RES_ERROR;
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}
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//其他表参数的获得
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//pdrv:磁盘编号0~9
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//ctrl:控制代码
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//*buff:发送/接收缓冲区指针
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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;
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if(pdrv==SD_CARD)//SD卡
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{
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switch(cmd)
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{
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case CTRL_SYNC:
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res = RES_OK;
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break;
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case GET_SECTOR_SIZE:
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*(DWORD*)buff = 512;
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res = RES_OK;
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break;
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case GET_BLOCK_SIZE:
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*(WORD*)buff = SDCardInfo.CardBlockSize;
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res = RES_OK;
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break;
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case GET_SECTOR_COUNT:
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*(DWORD*)buff = SDCardInfo.CardCapacity/512;
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res = RES_OK;
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break;
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default:
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res = RES_PARERR;
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break;
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}
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}
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else res=RES_ERROR;//其他的不支持
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return res;
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}
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