185 lines
5.2 KiB
C
185 lines
5.2 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 "usr_drv_sd_spi.h"
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/* Definitions of physical drive number for each drive */
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#define DEV_SDHC 0 /* Example: Map Ramdisk to physical drive 0 */
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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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switch (pdrv) {
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case DEV_SDHC:
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return RES_OK;
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}
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return STA_NOINIT;
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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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uint8_t result;
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switch (pdrv) {
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case DEV_SDHC :
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result = usr_drv_sd_init();
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if (result != 0x00) {
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usr_drv_sd_spi_set_speed_mode(USR_DRV_SD_HIGH_SPEED_MODE);
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usr_drv_sd_spi_read_write_byte(0xff);
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break;
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}
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return RES_OK;
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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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{
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uint8_t result;
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if (!count) {
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return RES_PARERR;//count<6E><74><EFBFBD>ܵ<EFBFBD><DCB5><EFBFBD>0<EFBFBD><30><EFBFBD><EFBFBD><EFBFBD>ز<F2B7B5BB><D8B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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}
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switch (pdrv) {
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case DEV_SDHC :
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result = usr_drv_sd_read_disk(buff, sector, count);
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if (result != 0) {
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usr_drv_sd_spi_read_write_byte(0xff);
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return RES_ERROR;
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}
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return RES_OK;
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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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{
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uint8_t result;
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switch (pdrv) {
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case DEV_SDHC :
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// translate the arguments here
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result = usr_drv_sd_write_disk((uint8_t*)buff, sector, count);
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if (result == 0x00) {
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return RES_OK;
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} else {
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return RES_ERROR;
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}
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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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{
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DRESULT result;
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if(pdrv == DEV_SDHC)//SD<53><44>
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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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usr_drv_sd_spi_cs(0);
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if(usr_drv_sd_wait_ready() == 0) {
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result = RES_OK;
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} else {
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result = RES_ERROR;
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}
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usr_drv_sd_spi_cs(1);
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break;
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case GET_SECTOR_SIZE:
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*(WORD*)buff = 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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*(WORD*)buff = 8;
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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 = usr_drv_sd_get_sector_count();
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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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} else {
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result = RES_ERROR;//<2F><><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD>֧<EFBFBD><D6A7>
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}
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return result;
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}
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/*---------------------------------------------------------*/
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/* User Provided Timer Function for FatFs module */
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/*---------------------------------------------------------*/
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/* This is a real time clock service to be called from */
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/* FatFs module. Any valid time must be returned even if */
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/* the system does not support a real time clock. */
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DWORD get_fattime (void)
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{
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return ((2010UL-1980) << 25) /* Year = 2010 */
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| (11UL << 21) /* Month = 11 */
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| (2UL << 16) /* Day = 2 */
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| (15U << 11) /* Hour = 15 */
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| (0U << 5) /* Min = 0 */
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| (0U >> 1) /* Sec = 0 */
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;
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}
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