No Interrupts at all reveived on STM32F413

[JHeni]

Hey guys

I'm currently wondering why i'm not reveiving any interrupts at all on my STM32F413

I used cube mx to create a new project.

For starters I'd like to send some data via UART with an interupt transfer.

uint8_t dummy[4] = { 0 };
volatile HAL_StatusTypeDef hal_uart_transmit = HAL_UART_Transmit_IT(&huart1, dummy, 4);
 
HAL_Delay(5000);

I'm only transfering 4 byte. That should be possible within 5 Seconds =)

the hal_uart_transmit status tells me OK. But this does not say anything about the actual transfer status since it is an interrupt transfer.

My Expectation: I'd expect some sort of UART1 interrupt (doens't matter if TX complete, RXNE or error at the moment).

Therefore i set a breakpoint in the UART 1 IRQ Handler BEFORE calling HAL_UART_IRQHandler(&huart1);

But i'm never getting there. So there is something wrong with my interrupts.

I verified that MX_USART1_UART_Init() is called at the beginning of main()

void MX_USART1_UART_Init(void)
{
 
 huart1.Instance = USART1;
 huart1.Init.BaudRate = 115200;
 huart1.Init.WordLength = UART_WORDLENGTH_9B;
 huart1.Init.StopBits = UART_STOPBITS_1;
 huart1.Init.Parity = UART_PARITY_EVEN;
 huart1.Init.Mode = UART_MODE_TX_RX;
 huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 huart1.Init.OverSampling = UART_OVERSAMPLING_16;
 
 if (HAL_UART_Init(&huart1) != HAL_OK)
 {
 Error_Handler();
 }
 
}

MX_UART1_Init calls the MSP Init which looks like this

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
 
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 if(uartHandle->Instance==USART1)
 {
 /* USER CODE BEGIN USART1_MspInit 0 */
 
 /* USER CODE END USART1_MspInit 0 */
 /* USART1 clock enable */
 __HAL_RCC_USART1_CLK_ENABLE();
 
 __HAL_RCC_GPIOA_CLK_ENABLE();
 /**USART1 GPIO Configuration 
 PA9 ------> USART1_TX
 PA10 ------> USART1_RX 
 */
 GPIO_InitStruct.Pin = UCE_USART1_TX_Pin;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_PULLUP;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
 HAL_GPIO_Init(UCE_USART1_TX_GPIO_Port, &GPIO_InitStruct);
 
 GPIO_InitStruct.Pin = UCE_USART1_RX_Pin;
 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
 GPIO_InitStruct.Pull = GPIO_PULLUP;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
 GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
 HAL_GPIO_Init(UCE_USART1_RX_GPIO_Port, &GPIO_InitStruct);
 
 /* USART1 interrupt Init */
 HAL_NVIC_SetPriority(USART1_IRQn, 7, 0);
 HAL_NVIC_EnableIRQ(USART1_IRQn);
 /* USER CODE BEGIN USART1_MspInit 1 */
 
 /* USER CODE END USART1_MspInit 1 */
 }
}

So the UART Interrupt should be enabled.

Do you have any ideas, why the interrupts are not comming through?

My UART Tests runs as a first step, before anything else runs. Nobody could disable my UART interrupt