Why does not work UART3 RX interrupt?

[Stastny.Petr]

#define RXBUFFERSIZE    2
uint8_t aRxBuffer[RXBUFFERSIZE];

static void MX_USART3_UART_Init(void) {
 
__HAL_RCC_USART3_CLK_ENABLE();
  huart3.Instance = USART3;
  huart3.Init.BaudRate = 115200;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  if(HAL_UART_DeInit(&huart3) != HAL_OK)
  {
    Error_Handler();
  }  	
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
    Error_Handler();
  }
	
	if (HAL_UART_Receive_IT(&huart3, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK) {
        Error_Handler();
    }
}

void USARTx_IRQHandler(void)
{
  HAL_UART_IRQHandler(&huart3);
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
{
ToggleLED(LED1);
}

My idea is that when I receive the byte, LED toggles. But instead of this, STM32F103RB is frozen. I do not see any problem. Can you help me please?

[Tesla DeLorean]

Try being explicit

1. void USART3_IRQHandler(void)
2. {
3. HAL_UART_IRQHandler(&huart3);
4. }

And if you don't get a multiple definition error, check the macro