106 lines
4.1 KiB
C
106 lines
4.1 KiB
C
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/*-----------------------------------------------------------------------*/
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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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/* Definitions of physical drive number for each drive */
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#define FATFS_MAX_DRIVE_NUM 4
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static struct fatfs_diskio* phys_drive[FATFS_MAX_DRIVE_NUM];
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static void* phys_device[FATFS_MAX_DRIVE_NUM];
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status(BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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if(pdrv >= FATFS_MAX_DRIVE_NUM || NULL == phys_drive[pdrv] || NULL == phys_drive[pdrv]->status)
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return STA_NOINIT;
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return (*phys_drive[pdrv]->status)(phys_device[pdrv]);
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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(BYTE pdrv /* Physical drive nmuber to identify the drive */
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)
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{
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if(pdrv >= FATFS_MAX_DRIVE_NUM || NULL == phys_drive[pdrv] || NULL == phys_drive[pdrv]->init)
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return STA_NOINIT;
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return (*phys_drive[pdrv]->init)(phys_device[pdrv]);
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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(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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if(pdrv >= FATFS_MAX_DRIVE_NUM || NULL == phys_drive[pdrv] || NULL == phys_drive[pdrv]->read)
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return RES_PARERR;
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return (*phys_drive[pdrv]->read)(phys_device[pdrv], buff, sector, count);
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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(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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if(pdrv >= FATFS_MAX_DRIVE_NUM || NULL == phys_drive[pdrv] || NULL == phys_drive[pdrv]->write)
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return RES_PARERR;
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return (*phys_drive[pdrv]->write)(phys_device[pdrv], (BYTE*)buff, sector, count);
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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(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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if(pdrv >= FATFS_MAX_DRIVE_NUM || NULL == phys_drive[pdrv] || NULL == phys_drive[pdrv]->ioctl)
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return RES_PARERR;
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return (*phys_drive[pdrv]->ioctl)(phys_device[pdrv], cmd, buff);
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}
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void fatfs_register_drive(BYTE pdrv, struct fatfs_diskio* driver, void *device)
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{
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if(pdrv < FATFS_MAX_DRIVE_NUM) {
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phys_drive[pdrv] = driver;
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phys_device[pdrv] = device;
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}// else
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//TEST_INFO_SHOW("Drive Number %d too large", pdrv);
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}
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