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fatfs: Add Ramdisk support
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CTCaer
parent
c8d6da5a23
commit
a2bb576c03
5 changed files with 86 additions and 11 deletions
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@ -47,6 +47,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
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/* Generic command (Used by FatFs) */
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#define CTRL_SYNC 0 /* Complete pending write process (needed at FF_FS_READONLY == 0) */
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#define GET_SECTOR_COUNT 1 /* Get media size (needed at FF_USE_MKFS == 1) */
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#define SET_SECTOR_COUNT 1 /* Set media size (needed at FF_USE_MKFS == 1) */
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#define GET_SECTOR_SIZE 2 /* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
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#define GET_BLOCK_SIZE 3 /* Get erase block size (needed at FF_USE_MKFS == 1) */
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#define CTRL_TRIM 4 /* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */
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@ -12,6 +12,7 @@
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#include "diskio.h" /* FatFs lower layer API */
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#include "../../../../common/memory_map.h"
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#include "../../storage/nx_sd.h"
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#include "../../storage/ramdisk.h"
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#include "../../storage/sdmmc.h"
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/*-----------------------------------------------------------------------*/
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@ -44,7 +45,15 @@ DRESULT disk_read (
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UINT count /* Number of sectors to read */
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)
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{
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return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : RES_ERROR;
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switch (pdrv)
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{
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case DRIVE_SD:
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return sdmmc_storage_read(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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case DRIVE_RAM:
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return ram_disk_read(sector, count, (void *)buff);
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}
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return RES_ERROR;
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}
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/*-----------------------------------------------------------------------*/
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@ -57,17 +66,74 @@ DRESULT disk_write (
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UINT count /* Number of sectors to write */
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)
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{
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return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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switch (pdrv)
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{
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case DRIVE_SD:
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return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
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case DRIVE_RAM:
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return ram_disk_write(sector, count, (void *)buff);
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}
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return RES_ERROR;
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}
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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static u32 part_rsvd_size = 0;
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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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DWORD *buf = (DWORD *)buff;
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if (pdrv == DRIVE_SD)
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{
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switch (cmd)
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{
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case GET_SECTOR_COUNT:
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*buf = sd_storage.sec_cnt - part_rsvd_size;
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break;
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case GET_BLOCK_SIZE:
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*buf = 32768; // Align to 16MB.
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break;
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}
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}
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else if (pdrv == DRIVE_RAM)
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{
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switch (cmd)
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{
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case GET_SECTOR_COUNT:
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*buf = RAM_DISK_SZ >> 9; // 1GB.
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break;
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case GET_BLOCK_SIZE:
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*buf = 2048; // Align to 1MB.
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break;
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}
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}
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return RES_OK;
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}
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DRESULT disk_set_info (
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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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DWORD *buf = (DWORD *)buff;
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if (pdrv == DRIVE_SD)
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{
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switch (cmd)
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{
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case SET_SECTOR_COUNT:
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part_rsvd_size = *buf;
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break;
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}
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}
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return RES_OK;
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}
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@ -23,6 +23,11 @@ typedef enum {
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RES_PARERR /* 4: Invalid Parameter */
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} DRESULT;
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typedef enum {
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DRIVE_SD = 0,
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DRIVE_RAM = 1,
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} DDRIVE;
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/*---------------------------------------*/
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/* Prototypes for disk control functions */
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@ -33,6 +38,7 @@ DSTATUS disk_status (BYTE pdrv);
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DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
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DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
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DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
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DRESULT disk_set_info (BYTE pdrv, BYTE cmd, void *buff);
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/* Disk Status Bits (DSTATUS) */
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@ -47,6 +53,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
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/* Generic command (Used by FatFs) */
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#define CTRL_SYNC 0 /* Complete pending write process (needed at FF_FS_READONLY == 0) */
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#define GET_SECTOR_COUNT 1 /* Get media size (needed at FF_USE_MKFS == 1) */
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#define SET_SECTOR_COUNT 1 /* Set media size (needed at FF_USE_MKFS == 1) */
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#define GET_SECTOR_SIZE 2 /* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
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#define GET_BLOCK_SIZE 3 /* Get erase block size (needed at FF_USE_MKFS == 1) */
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#define CTRL_TRIM 4 /* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */
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@ -38,7 +38,7 @@
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/ f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */
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#define FF_USE_MKFS 0
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#define FF_USE_MKFS 1
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/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
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#define FF_FASTFS 1
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@ -60,7 +60,7 @@
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/ (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
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#define FF_USE_LABEL 0
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#define FF_USE_LABEL 1
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/* This option switches volume label functions, f_getlabel() and f_setlabel().
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/ (0:Disable or 1:Enable) */
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@ -155,7 +155,7 @@
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*/
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#define FF_FS_RPATH 0
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#define FF_FS_RPATH 1
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/* This option configures support for relative path.
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/
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/ 0: Disable relative path and remove related functions.
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@ -168,12 +168,13 @@
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/ Drive/Volume Configurations
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/---------------------------------------------------------------------------*/
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#define FF_VOLUMES 1
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#define FF_VOLUMES 2
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/* Number of volumes (logical drives) to be used. (1-10) */
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#define FF_STR_VOLUME_ID 0
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#define FF_VOLUME_STRS "sd"
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#define FF_STR_VOLUME_ID 1
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// Order is important. Any change to order, must also be reflected to diskio drive enum.
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#define FF_VOLUME_STRS "sd","ram"
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/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
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/ When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
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/ number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
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@ -241,7 +242,7 @@
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/ Note that enabling exFAT discards ANSI C (C89) compatibility. */
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#define FF_FS_NORTC 1
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#define FF_FS_NORTC 0
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#define FF_NORTC_MON 1
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#define FF_NORTC_MDAY 1
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#define FF_NORTC_YEAR 2019
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@ -151,7 +151,7 @@ bool sd_mount()
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else
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{
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sd_init_done = true;
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res = f_mount(&sd_fs, "", 1);
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res = f_mount(&sd_fs, "sd:", 1);
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if (res == FR_OK)
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{
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sd_mounted = true;
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@ -173,7 +173,7 @@ void sd_unmount(bool deinit)
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if (sd_init_done && sd_mounted)
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{
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f_mount(NULL, "", 1);
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f_mount(NULL, "sd:", 1);
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sd_mounted = false;
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}
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if (sd_init_done && deinit)
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