how to enable uart interrupt

[Ndemir]

Hello,
I want to activate UART1 interrupt directly through code in STM32CubeIDE, without using the .ioc file. UART1 is already active, so I just need to add the necessary lines to enable the interrupt.

In the stm32wbxx_it.c file, I defined the interrupt handler as follows:

void USART1_IRQHandler(void)
{
/* USER CODE BEGIN USART1_IRQn 0 */

/* USER CODE END USART1_IRQn 0 */
HAL_UART_IRQHandler(&huart1);
/* USER CODE BEGIN USART1_IRQn 1 */

/* USER CODE END USART1_IRQn 1 */
}

In the stm32wbxx_it.h library, I declared the prototype as void USART1_IRQHandler(void);. However, I am still not able to receive data using the HAL_UART_Receive_IT function.

[Andrew Neil · Accepted solution]

Please see the posting tips for how to properly post source code:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

Use HAL_NVIC_SetPriority() and HAL_NVIC_EnableIRQ()

There should be examples in CubeIDE ?

[Ndemir]

Thank you for your information. I will consider when I post.

I add this in "stm32wbxx_it.h".

void USART1_IRQHandler(void);

I add this in "stm32wbxx_it.c".

void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */

  /* USER CODE END USART1_IRQn 0 */
  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */

  /* USER CODE END USART1_IRQn 1 */
}

Where should I use HAL_NVIC_SetPriority() and HAL_NVIC_EnableIRQ() functions. I compare my code with the other examples and I didn't find any difference.

[Andrew Neil]

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@Ndemir wrote:

Where should I use HAL_NVIC_SetPriority() and HAL_NVIC_EnableIRQ() functions.

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Wherever it makes sense to enable the interrupt - somewhere before you call the HAL_UART_Receive_IT() function

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@Ndemir wrote:

I compare my code with the other examples and I didn't find any difference.

---

Were they examples of using interrupts?

[Ndemir]

Thank you Andrew,

It works.
Best Regards,