add fatfs

software/sys_controller/fatfs/source/diskio.c

@@ -0,0 +1,128 @@
+/*-----------------------------------------------------------------------*/
+/* 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 "sd_io.h"
+#include "sysconfig.h"
+
+extern SD_DEV sdcard_dev;
+
+/* Definitions of physical drive number for each drive */
+#define DEV_RAM		0	/* Example: Map Ramdisk to physical drive 0 */
+#define DEV_MMC		1	/* Example: Map MMC/SD card to physical drive 1 */
+#define DEV_USB		2	/* Example: Map USB MSD to physical drive 2 */
+
+
+/*-----------------------------------------------------------------------*/
+/* Get Drive Status                                                      */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (
+	BYTE pdrv		/* Physical drive nmuber to identify the drive */
+)
+{
+    //res = SD_Status(&sdcard_dev);
+
+    return sdcard_dev.mount ? RES_OK : STA_NODISK;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (
+	BYTE pdrv				/* Physical drive nmuber to identify the drive */
+)
+{
+    DSTATUS stat;
+    SDRESULTS res;
+
+    if (sdcard_dev.mount)
+        return SD_OK;
+
+    res = SD_Init(&sdcard_dev);
+
+    return (res == SD_OK) ? RES_OK : STA_NOINIT;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s)                                                        */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_read (
+	BYTE pdrv,		/* Physical drive nmuber 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 */
+)
+{
+    SDRESULTS res;
+
+    if (!sdcard_dev.mount)
+        return STA_NOINIT;
+
+    res = SD_Read(&sdcard_dev, buff, sector, 0, count*SD_BLK_SIZE);
+
+    return (res == SD_OK) ? RES_OK : RES_PARERR;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s)                                                       */
+/*-----------------------------------------------------------------------*/
+
+#if FF_FS_READONLY == 0
+
+DRESULT disk_write (
+	BYTE pdrv,			/* Physical drive nmuber 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 */
+)
+{
+    SDRESULTS res;
+    int i;
+
+    if (!sdcard_dev.mount)
+        return STA_NOINIT;
+
+    for (i=0; i<count; i++) {
+        res = SD_Write(&sdcard_dev, (void*)&buff[i*SD_BLK_SIZE], sector);
+        if (res != SD_OK)
+            return RES_PARERR;
+    }
+
+    return RES_OK;
+}
+
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions                                               */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_ioctl (
+	BYTE pdrv,		/* Physical drive nmuber (0..) */
+	BYTE cmd,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+    DRESULT res;
+    int result;
+
+    return RES_PARERR;
+}
+