1、STM32H5有一个全速度USB2.0和一个USB Type-C/USB power-delivery。基于Type-C支持正反插、速度更快、供电更强大等优点目前很多电子产品很多都是使用USB Type-C接口，STM32H5直接支持USB Type-C可以给我们在使用中带来更多的便利。
NUCLEO-H563ZI上USB口的硬件接口电路如下：D+1/D-1和D+2/D-2用于传输USB 2.0数据。
STM32Cube_FW_H5_V1.1.0开发包里面提供了使用Azure RTOS USBX 协议栈提供的USB demo，好久没有用ST的新产品了，都换成了USBX了吗。这和我之前熟悉的ST自己提供的USB device和host 协议栈不太一样，也是第一次接触USBX ，先了解学习下。
下面测试的是HID和CDC的复合设备的例子。
程序中使用的RTOS 是ThreadX，总共创建了4个任务用于初始化USB驱动和启动USB、CDC接收数据、CDC发送数据、HID传输数据。
1）USB读取功能，用于从USB VCP接收数据，然后发送到STlink的虚拟串口上
- VOID usbx_cdc_acm_read_thread_entry(ULONG thread_input)
- {
- ULONG actual_length;
- ULONG senddataflag = 0;
- UX_SLAVE_DEVICE *device;
- UX_PARAMETER_NOT_USED(thread_input);
- device = &_ux_system_slave->ux_system_slave_device;
- while (1)
- {
- /* Check if device is configured */
- if ((device->ux_slave_device_state == UX_DEVICE_CONFIGURED) && (cdc_acm != UX_NULL))
- {
- #ifndef UX_DEVICE_CLASS_CDC_ACM_TRANSMISSION_DISABLE
- /* Set transmission_status to UX_FALSE for the first time */
- cdc_acm -> ux_slave_class_cdc_acm_transmission_status = UX_FALSE;
- #endif /* UX_DEVICE_CLASS_CDC_ACM_TRANSMISSION_DISABLE */
- /* Read the received data in blocking mode */
- ux_device_class_cdc_acm_read(cdc_acm, (UCHAR *)UserRxBufferFS, 64,
- &actual_length);
- if (actual_length != 0)
- {
- /* Send the data via UART */
- if (HAL_UART_Transmit_DMA(uart_handler, (uint8_t *)UserRxBufferFS, actual_length) != HAL_OK)
- {
- Error_Handler();
- }
- /* Wait until the requested flag TX_NEW_TRANSMITTED_DATA is received */
- if (tx_event_flags_get(&EventFlag, TX_NEW_TRANSMITTED_DATA, TX_OR_CLEAR,
- &senddataflag, TX_WAIT_FOREVER) != TX_SUCCESS)
- {
- Error_Handler();
- }
- }
- else
- {
- /* Sleep thread for 10ms if no data received */
- tx_thread_sleep(MS_TO_TICK(10));
- }
- }
- else
- {
- /* Sleep thread for 10ms */
- tx_thread_sleep(MS_TO_TICK(10));
- }
- }
- }
- VOID usbx_cdc_acm_write_thread_entry(ULONG thread_input)
- {
- ULONG receivedataflag = 0;
- ULONG actual_length, buffptr, buffsize;
- UX_PARAMETER_NOT_USED(thread_input);
- while (1)
- {
- /* Wait until the requested flag RX_NEW_RECEIVED_DATA is received */
- if (tx_event_flags_get(&EventFlag, RX_NEW_RECEIVED_DATA, TX_OR_CLEAR,
- &receivedataflag, TX_WAIT_FOREVER) != TX_SUCCESS)
- {
- Error_Handler();
- }
- #ifndef UX_DEVICE_CLASS_CDC_ACM_TRANSMISSION_DISABLE
- /* Set transmission_status to UX_FALSE for the first time */
- cdc_acm -> ux_slave_class_cdc_acm_transmission_status = UX_FALSE;
- #endif
- /* Check if there is a new data to send */
- if (UserTxBufPtrOut != UserTxBufPtrIn)
- {
- /* Check buffer overflow and Rollback */
- if (UserTxBufPtrOut > UserTxBufPtrIn)
- {
- buffsize = APP_RX_DATA_SIZE - UserTxBufPtrOut;
- }
- else
- {
- /* Calculate data size */
- buffsize = UserTxBufPtrIn - UserTxBufPtrOut;
- }
- /* Copy UserTxBufPtrOut in buffptr */
- buffptr = UserTxBufPtrOut;
- /* Send data over the class cdc_acm_write */
- if (ux_device_class_cdc_acm_write(cdc_acm, (UCHAR *)(&UserTxBufferFS[buffptr]),
- buffsize, &actual_length) == UX_SUCCESS)
- {
- /* Increment the UserTxBufPtrOut pointer */
- UserTxBufPtrOut += buffsize;
- /* Rollback UserTxBufPtrOut if it equal to APP_TX_DATA_SIZE */
- if (UserTxBufPtrOut == APP_TX_DATA_SIZE)
- {
- UserTxBufPtrOut = 0;
- }
- }
- }
- }
- }
3）HID 功能用于将用户按下开发板上的按键之后发送到PC上，鼠标就会移动一下
- VOID usbx_hid_thread_entry(ULONG thread_input)
- {
- UX_SLAVE_DEVICE *device;
- UX_SLAVE_CLASS_HID_EVENT hid_event;
- UX_PARAMETER_NOT_USED(thread_input);
- device = &_ux_system_slave->ux_system_slave_device;
- ux_utility_memory_set(&hid_event, 0, sizeof(UX_SLAVE_CLASS_HID_EVENT));
- while (1)
- {
- /* Check if the device state already configured */
- if ((device->ux_slave_device_state == UX_DEVICE_CONFIGURED) && (hid_mouse != UX_NULL))
- {
- /* sleep for 10ms */
- tx_thread_sleep(MS_TO_TICK(10));
- /* Check if user button is pressed */
- if (User_Button_State != 0U)
- {
- /* Get the new position */
- GetPointerData(&hid_event);
- /* Send an event to the hid */
- ux_device_class_hid_event_set(hid_mouse, &hid_event);
- /* Reset User Button state */
- User_Button_State = 0U;
- }
- }
- else
- {
- /* Sleep thread for 10ms */
- tx_thread_sleep(MS_TO_TICK(10));
- }
- }
- }
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