285 lines
8.2 KiB
C
285 lines
8.2 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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#include <string.h>
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#include "at32_sdio.h" /* Example: Header file of existing MMC/SDC contorl module */
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/* Definitions of physical drive number for each drive */
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#define DEV_RAM 0 /* Example: Map Ramdisk to physical drive 0 */
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#define DEV_MMC 1 /* Example: Map MMC/SD card to physical drive 1 */
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#define DEV_USB 2 /* Example: Map USB MSD to physical drive 2 */
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uint8_t sdio_data_buffer[512]; /* buf for sd_read_disk/sd_write_disk function used. */
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sd_error_status_type sd_read_disk(uint8_t *buf, uint32_t sector, uint8_t cnt);
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sd_error_status_type sd_write_disk(const uint8_t *buf, uint32_t sector, uint8_t cnt);
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/**
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* @brief read sd card sector
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* @param buf: read data buf
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* @param sector: sector address
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* @param cnt: sector count
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* @retval sd_error_status_type: sd card error code.
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*/
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sd_error_status_type sd_read_disk(uint8_t *buf, uint32_t sector, uint8_t cnt) {
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sd_error_status_type sta = SD_OK;
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long long lsector = sector;
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uint8_t n;
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/* data address is in block (512 byte) units. */
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lsector <<= 9;
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if ((uint32_t) buf % 4 != 0) {
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for (n = 0; n < cnt; n++) {
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sta = sd_block_read(sdio_data_buffer, lsector + 512 * n, 512);
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memcpy(buf, sdio_data_buffer, 512);
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buf += 512;
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}
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} else {
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if (cnt == 1) {
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sta = sd_block_read(buf, lsector, 512);
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} else {
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sta = sd_mult_blocks_read(buf, lsector, 512, cnt);
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}
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}
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return sta;
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}
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/**
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* @brief write sd card sector
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* @param buf: write data buf
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* @param sector: sector address
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* @param cnt: sector count
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* @retval sd_error_status_type: sd card error code.
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*/
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sd_error_status_type sd_write_disk(const uint8_t *buf, uint32_t sector, uint8_t cnt) {
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sd_error_status_type sta = SD_OK;
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uint8_t n;
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long long lsector = sector;
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/* data address is in block (512 byte) units. */
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lsector <<= 9;
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if ((uint32_t) buf % 4 != 0) {
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for (n = 0; n < cnt; n++) {
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memcpy(sdio_data_buffer, buf, 512);
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sta = sd_block_write(sdio_data_buffer, lsector + 512 * n, 512);
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buf += 512;
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}
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} else {
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if (cnt == 1) {
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sta = sd_block_write(buf, lsector, 512);
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} else {
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sta = sd_mult_blocks_write(buf, lsector, 512, cnt);
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}
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}
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return sta;
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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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DSTATUS stat;
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int result;
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switch (pdrv) {
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case DEV_RAM :
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result = 1;
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stat = (DSTATUS) result;
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return stat;
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case DEV_MMC :
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result = 0;
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stat = (DSTATUS) result;
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return stat;
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case DEV_USB :
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result = 1;
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stat = (DSTATUS) result;
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return stat;
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}
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return STA_NOINIT;
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}
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#include "cmsis_os2.h"
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//osMutexId_t accessFS;
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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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// accessFS = osMutexNew(NULL);
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DSTATUS stat;
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int result;
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switch (pdrv) {
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case DEV_RAM :
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result = 1;
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stat = (DSTATUS) result;
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return stat;
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case DEV_MMC :
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result = sd_init();
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stat = (DSTATUS) result;
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return stat;
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case DEV_USB :
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result = 1;
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stat = (DSTATUS) result;
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return stat;
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}
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return STA_NOINIT;
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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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DRESULT res;
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int result;
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switch (pdrv) {
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case DEV_RAM :
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result = 1;
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res = (DRESULT) result;
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return res;
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case DEV_MMC :
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// osMutexAcquire(accessFS, osWaitForever);
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result = sd_read_disk(buff, sector, count);
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// osMutexRelease(accessFS);
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res = (DRESULT) result;
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return res;
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case DEV_USB :
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result = 1;
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res = (DRESULT) result;
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return res;
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}
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return RES_PARERR;
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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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DRESULT res;
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int result;
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switch (pdrv) {
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case DEV_RAM :
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result = 1;
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res = (DRESULT) result;
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return res;
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case DEV_MMC :
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// osMutexAcquire(accessFS, osWaitForever);
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result = sd_write_disk(buff, sector, count);
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// osMutexRelease(accessFS);
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res = (DRESULT) result;
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return res;
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case DEV_USB :
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result = 1;
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res = (DRESULT) result;
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return res;
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}
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return RES_PARERR;
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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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DRESULT res;
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int result;
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switch (pdrv) {
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case DEV_RAM :
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result = 1;
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res = (DRESULT) result;
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return res;
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case DEV_MMC :
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switch (cmd) {
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case CTRL_SYNC:
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result = 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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result = RES_OK;
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break;
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case GET_SECTOR_COUNT:
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*(DWORD *) buff = sd_card_info.card_capacity / 512;
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result = RES_OK;
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break;
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case GET_BLOCK_SIZE:
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*(DWORD *) buff = sd_card_info.card_blk_size;
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result = RES_OK;
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break;
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default:
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result = RES_PARERR;
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break;
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}
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res = (DRESULT) result;
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return res;
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case DEV_USB :
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result = 1;
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res = (DRESULT) result;
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return res;
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}
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return RES_PARERR;
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}
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