mirror of
https://github.com/fail0verflow/mini.git
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127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
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/*-----------------------------------------------------------------------*/
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/* This is a stub disk I/O module that acts as front end of the existing */
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/* disk I/O modules and attach it to FatFs module with common interface. */
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/*-----------------------------------------------------------------------*/
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#include "diskio.h"
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#include "string.h"
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#include "sdhc.h"
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#ifndef MEM2_BSS
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#define MEM2_BSS
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#endif
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static sdhci_t sdhci;
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static u8 buffer[512] MEM2_BSS ALIGNED(32);
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/*-----------------------------------------------------------------------*/
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/* Inidialize a Drive */
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DSTATUS disk_initialize (
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BYTE drv /* Physical drive nmuber (0..) */
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)
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{
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s32 ret;
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sd_init(&sdhci, 0);
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ret = sd_mount(&sdhci);
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if (ret < 0)
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return STA_NOINIT;
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else
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return disk_status(drv);
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}
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/*-----------------------------------------------------------------------*/
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/* Return Disk Status */
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DSTATUS disk_status (
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BYTE drv /* Physical drive nmuber (0..) */
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)
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{
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if (sd_inserted(&sdhci) == 0)
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return STA_NODISK;
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return 0;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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DRESULT disk_read (
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BYTE drv, /* Physical drive nmuber (0..) */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector address (LBA) */
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BYTE count /* Number of sectors to read (1..255) */
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)
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{
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int i;
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DRESULT res;
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res = RES_OK;
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for (i = 0; i < count; i++) {
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if (sd_read(&sdhci, sector + i, 1, buffer) != 0) {
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res = RES_ERROR;
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break;
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}
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memcpy(buff + i * 512, buffer, 512);
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}
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return res;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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#if _READONLY == 0
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DRESULT disk_write (
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BYTE drv, /* Physical drive nmuber (0..) */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector address (LBA) */
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BYTE count /* Number of sectors to write (1..255) */
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)
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{
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int i;
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DRESULT res;
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res = RES_OK;
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for (i = 0; i < count; i++) {
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memcpy(buffer, buff + i * 512, 512);
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if(sd_write(&sdhci, sector + i, 1, buffer) != 0) {
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res = RES_ERROR;
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break;
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}
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}
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return res;
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}
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#endif /* _READONLY */
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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DRESULT disk_ioctl (
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BYTE drv, /* Physical drive nmuber (0..) */
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BYTE ctrl, /* 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 (ctrl == CTRL_SYNC)
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return RES_OK;
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return RES_PARERR;
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}
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