FileX+USBX Msc双边同步问题

JasonChen

目前使用的存储介质是SD卡，进行fx_media_format格式化之后，可以被PC正常识别，写入读取都是正常的。
但是存在本地和PC端不同步的问题，比如在本地创建或写入文件，创建或写入后立即调用了fx_media_flush，本地已经生效，PC端也不会立即刷新出文件，需要重新枚举才能正常显示。
同样通过PC端写入文件，需要重新fx_media_open本地才能看到PC端上次写入的文件。

造成这样的现象，貌似是两边在维护不同的FAT表。请问有什么好的解决方法吗？

下面是我的格式化代码，以及MSC相关操作代码。

[C] 纯文本查看 复制代码

    HAL_SD_CardInfoTypeDef cardInfo;
    HAL_SD_GetCardInfo(&hsd1, &cardInfo);

    fxStatus = fx_media_format(&sdioDisk,                   //Disk Handle
                                fx_stm32_sd_driver,         //Disk Driver
                                (VOID *)FX_NULL,            //Unused
                                (UCHAR *)fxSDMediaMemory,   //Disk Buffer
                                sizeof(fxSDMediaMemory),    //Disk Buffer Size
                                FX_SD_VOLUME_NAME,          //Volume Name
                                1,                          //Num of FATs
                                32,                         //Directory Entries
                                0,                          //Hidden Sectors
                                ((cardInfo.BlockNbr * cardInfo.BlockSize) / FX_STM32_SD_DEFAULT_SECTOR_SIZE),//Total Sectors
                                FX_STM32_SD_DEFAULT_SECTOR_SIZE,//Bytes per Sector
                                128,                        //Sectors per Cluster
                                1,                          //Heads
                                1);                         //Sectors per Track

[C] 纯文本查看 复制代码

/**
  * @brief  USBD_STORAGE_Read
  *         This function is invoked to read from media.
  * @param  storage_instance : Pointer to the storage class instance.
  * @param  lun: Logical unit number is the command is directed to.
  * @param  data_pointer: Address of the buffer to be used for reading or writing.
  * @param  number_blocks: number of sectors to read/write.
  * @param  lba: Logical block address is the sector address to read.
  * @param  media_status: should be filled out exactly like the media status
  *                       callback return value.
  * @retval status
  */
UINT USBD_STORAGE_Read(VOID *storage_instance, ULONG lun, UCHAR *data_pointer,
                       ULONG number_blocks, ULONG lba, ULONG *media_status)
{
  UINT status = UX_SUCCESS;

  /* USER CODE BEGIN USBD_STORAGE_Read */
    UINT fxStatus = FX_SUCCESS;
    while (number_blocks--) {
        fxStatus = fx_media_read(sdioDisk, lba, data_pointer);
        if (fxStatus != FX_SUCCESS) {
            status = UX_ERROR;
            break;
        }
        data_pointer += sdioDisk->fx_media_bytes_per_sector;
        lba++;
    }
  /* USER CODE END USBD_STORAGE_Read */

  return status;
}

/**
  * @brief  USBD_STORAGE_Write
  *         This function is invoked to write in media.
  * @param  storage_instance : Pointer to the storage class instance.
  * @param  lun: Logical unit number is the command is directed to.
  * @param  data_pointer: Address of the buffer to be used for reading or writing.
  * @param  number_blocks: number of sectors to read/write.
  * @param  lba: Logical block address is the sector address to read.
  * @param  media_status: should be filled out exactly like the media status
  *                       callback return value.
  * @retval status
  */
UINT USBD_STORAGE_Write(VOID *storage_instance, ULONG lun, UCHAR *data_pointer,
                        ULONG number_blocks, ULONG lba, ULONG *media_status)
{
  UINT status = UX_SUCCESS;

  /* USER CODE BEGIN USBD_STORAGE_Write */
    UINT fxStatus = FX_SUCCESS;
    while (number_blocks--) {
        fxStatus = fx_media_write(sdioDisk, lba, data_pointer);
        if (fxStatus != FX_SUCCESS && lba != 0) {
            status = UX_ERROR;
            break;
        }
        data_pointer += sdioDisk->fx_media_bytes_per_sector;
        lba++;
    }
  /* USER CODE END USBD_STORAGE_Write */

  return status;
}

JasonChen

弃用MSC了，改为PIMA MTP，由设备端统一管理文件系统，可以完美兼容

JasonChen

弃用MSC了，使用PIMA MTP类，由下位机管理文件系统，可以完美兼容

eric2013

是的mtp是非常好的方案