USBX与STM32H7相关资源

ThreadX官方文档
ThreadX代码仓库
STM32Cube MCU包
USBX代码仓库
x-cube-azrtos-h7

USBX移植（仅移植device部分）

首先在USBX代码仓库中下载USBX，将FileX的.\common\core\scr、.\common\usbx_device_classes\scr文件夹下的源文件全部添加到工程中，.\port文件夹下没有源文件，这一部分需要自己实现（STM32提供了相关代码），并添加包含路径.\common\core\inc、.\ports\cortex_m7\gnu\inc。
需要注意，有些函数需要使用NetX，将这些文件设置为不编译即可（若直接使用宏定义UX_STANDALONE会导致运行不正常，目前原因未知）。

移植sd驱动

下载x-cube-azrtos-h7，将一个Projects\STM32H735G-DK\Applications\USBX\Ux_Device_MSC\USBX下的ux_device_descriptors.c、ux_device_msc.c添加到工程中并添加相应头文件，app_usbx_device.c中有示例实现，也可以添加进来在此基础上修改，将.\Middlewares\ST\USBX\common\usbx_stm32_device_controllers下的源文件添加进工程，并添加相应的头文件。

修改相关文件

此外，还需要我们实现ux_device_msc.c下的读取储存介质的函数：

/**
 * @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 */
    UX_PARAMETER_NOT_USED(storage_instance);
    UX_PARAMETER_NOT_USED(lun);
    UX_PARAMETER_NOT_USED(number_blocks);
    UX_PARAMETER_NOT_USED(media_status);

    for (UINT block = 0; block < number_blocks; block++)
    {
        status = fx_media_read(&sdio_disk, lba + block, data_pointer);
        data_pointer += sdio_disk.fx_media_bytes_per_sector;
        if(status != UX_SUCCESS)
        {
            break;
        }
    }

    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 */
    UX_PARAMETER_NOT_USED(storage_instance);
    UX_PARAMETER_NOT_USED(lun);
    UX_PARAMETER_NOT_USED(number_blocks);
    UX_PARAMETER_NOT_USED(media_status);

    for (UINT block = 0; block < number_blocks; block++)
    {
        status = fx_media_write(&sdio_disk, lba + block, data_pointer);
        data_pointer += sdio_disk.fx_media_bytes_per_sector;
        if(status != UX_SUCCESS)
        {
            break;
        }
    }
    return status;
}

以上是USBD_STORAGE_Read、USBD_STORAGE_Write两个函数在FileX基础上实现的

/**
 * @brief  USBD_STORAGE_GetMediaLastLba
 *         Get Media last LBA.
 * @param  none
 * @retval last lba
 */
ULONG USBD_STORAGE_GetMediaLastLba(VOID)
{
    ULONG LastLba = 0U;

    /* USER CODE BEGIN USBD_STORAGE_GetMediaLastLba */

    LastLba = (ULONG)(hsd1.SdCard.BlockNbr - 1);

    /* USER CODE END USBD_STORAGE_GetMediaLastLba */

    return LastLba;
}

/**
 * @brief  USBD_STORAGE_GetMediaBlocklength
 *         Get Media block length.
 * @param  none.
 * @retval block length.
 */
ULONG USBD_STORAGE_GetMediaBlocklength(VOID)
{
    ULONG MediaBlockLen = 0U;

    /* USER CODE BEGIN USBD_STORAGE_GetMediaBlocklength */

    MediaBlockLen = (ULONG)hsd1.SdCard.BlockSize;

    /* USER CODE END USBD_STORAGE_GetMediaBlocklength */

    return MediaBlockLen;
}

USBD_STORAGE_GetMediaBlocklength、USBD_STORAGE_GetMediaLastLba是直接读取的HAL库中的结构体得到的。
至此，移植完毕。

可选的配置选项

若要使用ux_user.h需要宏定义UX_INCLUDE_USER_DEFINE。