135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module SKELETON for FatFs (C)ChaN, 2019 */
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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 "ff.h" /* Obtains integer types */
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#include "diskio.h" /* Declarations of disk functions */
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static ff_disk_read_cb ReadCb;
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static ff_disk_write_cb WriteCb;
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static DSTATUS Status = STA_NOINIT | STA_NODISK;
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void ff_disk_open(ff_disk_read_cb readcb, ff_disk_write_cb writecb)
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{
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if (!readcb) return;
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ReadCb = readcb;
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WriteCb = writecb;
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Status &= ~STA_NODISK;
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if (!writecb) Status |= STA_PROTECT;
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else Status &= ~STA_PROTECT;
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}
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void ff_disk_close()
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{
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ReadCb = (void*)0;
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WriteCb = (void*)0;
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Status &= ~STA_PROTECT;
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Status |= STA_NODISK;
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}
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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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 Status;
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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 (
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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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Status &= ~STA_NOINIT;
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return Status;
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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 (
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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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LBA_t 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 (Status & (STA_NOINIT | STA_NODISK)) return RES_NOTRDY;
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if (!ReadCb) return RES_ERROR;
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UINT res = ReadCb(buff, sector, count);
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if (res != count) return RES_ERROR;
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if FF_FS_READONLY == 0
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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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LBA_t 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 (Status & (STA_NOINIT | STA_NODISK)) return RES_NOTRDY;
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if (Status & STA_PROTECT) return RES_WRPRT;
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if (!WriteCb) return RES_ERROR;
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UINT res = WriteCb(buff, sector, count);
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if (res != count) return RES_ERROR;
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return RES_OK;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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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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switch (cmd)
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{
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case 0: // sync
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// TODO: fflush?
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return RES_OK;
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}
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//printf("disk_ioctl(%02X, %02X, %p)\n", pdrv, cmd, buff);
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return RES_PARERR;
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}
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