修复若干bug&完善fatfs服务&完善app

mkrtos_user/server/fs/fatfs/ram_disk_drv/diskio.c

@@ -0,0 +1,156 @@
+/*-----------------------------------------------------------------------*/
+/* 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 "ram_disk.h"
+#include <stdio.h>
+/* 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 */
+)
+{
+	DSTATUS stat;
+	int result;
+
+	switch (pdrv)
+	{
+	case DEV_RAM:
+		result = 0;
+
+		// translate the reslut code here
+		stat = RES_OK;
+		return stat;
+	}
+	return STA_NOINIT;
+}
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize(
+	BYTE pdrv /* Physical drive nmuber to identify the drive */
+)
+{
+	DSTATUS stat;
+	int result;
+
+	switch (pdrv)
+	{
+	case DEV_RAM:
+		result = 0;
+		stat = RES_OK;
+		// translate the reslut code here
+		return stat;
+	}
+	return 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 */
+)
+{
+	DRESULT res;
+
+	switch (pdrv)
+	{
+	case DEV_RAM:
+		// translate the reslut code here
+		if (ram_disk_read(buff, sector, count) < 0) {
+			return RES_ERROR;
+		}
+		return 0;
+	}
+
+	return 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 */
+)
+{
+	int result;
+
+	switch (pdrv)
+	{
+	case DEV_RAM:
+		// translate the arguments here
+
+		if (ram_disk_write((uint8_t *)buff, sector, count) < 0) {
+			return RES_ERROR;
+		}
+		return 0;
+	}
+
+	return RES_PARERR;
+}
+
+#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;
+
+	switch (pdrv)
+	{
+	case DEV_RAM:
+		switch (cmd)
+		{					   // fatfs内核使用cmd调用
+		case GET_SECTOR_COUNT: // sector count, 传入sect_cnt
+			*(DWORD *)buff = ram_disk_sector_nr();
+			return RES_OK;
+		case GET_SECTOR_SIZE: // sector size, 传入block size(SD),单位bytes
+			*(DWORD *)buff = 512;
+			return RES_OK;
+		case GET_BLOCK_SIZE:	// block size, 由上文可得，对于SD2.0卡最大8192，最小 1
+			*(DWORD *)buff = 1; // 单位为 sector(FatFs)
+			return RES_OK;
+		case CTRL_SYNC: // 同步命令，貌似FatFs内核用来判断写操作是否完成
+			return RES_OK;
+		}
+	default:
+		printf("No device %d.\n", pdrv);
+		break;
+	}
+	return RES_PARERR; // 默认返回参数错误
+}