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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很不错的资源，学习一下