Minimum HID mouse test code?

[MM..1]

I try on nucleo F446

  MX_USB_HOST_Init();
  /* USER CODE BEGIN 2 */
  USBH_ReEnumerate(&hUsbHostFS);
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
    MX_USB_HOST_Process();
 
    /* USER CODE BEGIN 3 */
 
    if(USBH_HID_GetDeviceType(&hUsbHostFS) == HID_MOUSE)   m_pinfo = USBH_HID_GetMouseInfo(&hUsbHostFS);
 
  }
  /* USER CODE END 3 */

but m_pinfo dont show move or buttons. What i miss.

[Andrew Neil]

Is the enumeration succeeding?

Is the mouse getting power?

[MM..1 · Accepted solution]

Ofcourse. I solve moving get into HID callback. Now all works ok.

Why MX dont place callback into generated main?

/* USER CODE BEGIN 0 */
char Uart_Buf[200];
void USBH_HID_EventCallback(USBH_HandleTypeDef *phost)
{
	if(USBH_HID_GetDeviceType(phost) == HID_MOUSE)  // if the HID is Mouse
	{
		HID_MOUSE_Info_TypeDef *Mouse_Info;
		Mouse_Info = USBH_HID_GetMouseInfo(phost);  // Get the info
		int len = sprintf (Uart_Buf, "X=%d, Y=%d, Button1=%d, Button2=%d, Button3=%d\r\n", (int8_t)Mouse_Info->x, (int8_t)Mouse_Info->y, Mouse_Info->buttons[0],Mouse_Info->buttons[1], Mouse_Info->buttons[2]);
		HAL_UART_Transmit(&huart3, (uint8_t *) Uart_Buf, len, 100);
	}
}
/* USER CODE END 0 */
 
/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
 
  /* Configure the system clock */
  SystemClock_Config();
 
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART3_UART_Init();
  MX_USB_HOST_Init();
  /* USER CODE BEGIN 2 */
  /* USER CODE END 2 */
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
    MX_USB_HOST_Process();
 
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

[Andrew Neil]

@MM..1​ "Why MX dont place callback into generated main?"

Because it has no way to know where you want it to happen in your code?

"Now all works ok"

You know what to do: