/*-----------------------------------------------------------------------*/ /* Low level disk I/O module SKELETON for FatFs (C)ChaN, 2019 */ /*-----------------------------------------------------------------------*/ /* If a working storage control module is available, it should be */ /* attached to the FatFs via a glue function rather than modifying it. */ /* This is an example of glue functions to attach various exsisting */ /* storage control modules to the FatFs module with a defined API. */ /*-----------------------------------------------------------------------*/ #include "ff.h" /* Obtains integer types */ #include "diskio.h" /* Declarations of disk functions */ #include "string.h" #include "stdio.h" /* Definitions of physical drive number for each drive */ #define DEV_MMC 0 /* Example: Map MMC/SD card to physical drive 1 */ #define DEV_USB 1 /* Example: Map USB MSD to physical drive 2 */ /* SD Card Instance */ extern sd_handle_t Hsd; const diskio_t *p_SD_Driver = &SD_Driver; static sd_handle_t *pHsd = &Hsd; /* Interrupt Handler callback */ volatile uint32_t dma_done_irq; void sd_cb(uint32_t status) { if(status == RES_OK) dma_done_irq = 1; else printf("Invalid Xfer status...:%d\n",status); } extern unsigned char media_memory; volatile uint8_t *dma_buff = &media_memory; /*-----------------------------------------------------------------------*/ /* Get Drive Status */ /*-----------------------------------------------------------------------*/ DSTATUS disk_status ( BYTE pdrv /* Physical drive number to identify the drive */ ) { return RES_OK; } /*-----------------------------------------------------------------------*/ /* Inidialize a Drive */ /*-----------------------------------------------------------------------*/ DSTATUS disk_initialize(BYTE drivenum)//FATFS *p_sd_card, char *MEDIA_NAME, void * media_memory, uint32_t media_size) { DSTATUS stat; int status; sd_param_t sd_param; sd_param.dev_id = SDMMC_DEV_ID; sd_param.clock_id = RTE_SDC_CLOCK_SELECT; sd_param.bus_width = RTE_SDC_BUS_WIDTH; sd_param.dma_mode = RTE_SDC_DMA_SELECT; sd_param.app_callback = sd_cb; status = p_SD_Driver->disk_initialize(&sd_param); if(status) return STA_NOINIT; /*dummy read */ memset((void *)dma_buff, '\0', sizeof(media_memory)); p_SD_Driver->disk_read(0, 1, dma_buff); sys_busy_loop_us(1000); return RES_OK; } /*-----------------------------------------------------------------------*/ /* Read Sector(s) */ /*-----------------------------------------------------------------------*/ DRESULT disk_read ( BYTE pdrv, /* Physical drive number to identify the drive */ BYTE *buff, /* Data buffer to store read data */ LBA_t sector, /* Start sector in LBA */ UINT count /* Number of sectors to read */ ) { DRESULT res; int result; dma_done_irq = 0; result = p_SD_Driver->disk_read(sector, count, dma_buff); while(!dma_done_irq); RTSS_InvalidateDCache_by_Addr((volatile void *)dma_buff, count * SDMMC_BLK_SIZE_512_Msk); memcpy(buff, (const void *)dma_buff, count * SDMMC_BLK_SIZE_512_Msk); return RES_OK; } /*-----------------------------------------------------------------------*/ /* Write Sector(s) */ /*-----------------------------------------------------------------------*/ #if FF_FS_READONLY == 0 DRESULT disk_write ( BYTE pdrv, /* Physical drive number to identify the drive */ const BYTE *buff, /* Data to be written */ LBA_t sector, /* Start sector in LBA */ UINT count /* Number of sectors to write */ ) { DRESULT res = RES_OK; dma_done_irq = 0; RTSS_CleanDCache_by_Addr((volatile void *)buff, count * SDMMC_BLK_SIZE_512_Msk); memcpy((void*)dma_buff, buff, count * SDMMC_BLK_SIZE_512_Msk); if( p_SD_Driver->disk_write(sector, count, (volatile uint8_t *)dma_buff) != SD_DRV_STATUS_OK ) res = RES_ERROR; while(!dma_done_irq); return res; } #endif /*-----------------------------------------------------------------------*/ /* Miscellaneous Functions */ /*-----------------------------------------------------------------------*/ DRESULT disk_ioctl ( BYTE pdrv, /* Physical drive number (0..) */ BYTE cmd, /* Control code */ void *buff /* Buffer to send/receive control data */ ) { DRESULT res = 0; switch (pdrv) { case DEV_MMC : // Process of the command for the MMC/SD card return res; case DEV_USB : // Process of the command the USB drive return res; } return RES_PARERR; }