STM32CubeMX basics: 10.10 STM32Cube HAL labs UART - Lab UART IT

[JZaya.1]

Hello,

I am following tutorial and the file does not compile, what is wrong? https://www.youtube.com/watch?v=5i-Gw7OC7oo&list=PLnMKNibPkDnGtuIl5v0CvC81Am7SKpj02&index=48

/* USER CODE BEGIN PV */
uint8_t buffer_tx[10] = {10,11,12,13,14,15,16,17,18,19};
uint8_t buffer_rx[10];
/* USER CODE END PV */

/* USER CODE BEGIN 0 */
HAL_UART_Receive_IT(&huart1, buffer_rx, 10);
HAL_UART_Transmit_IT(&huart1, buffer_tx, 10);
/* USER CODE END 0 */

/* USER CODE BEGIN 4 */

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart){

}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){

while (1);

}

/* USER CODE END 4 */

../Core/Src/main.c:60:21: error: expected declaration specifiers or '...' before '&' token
60 | HAL_UART_Receive_IT(&huart1, buffer_rx, 10);
| ^
../Core/Src/main.c:60:30: error: expected declaration specifiers or '...' before 'buffer_rx'
60 | HAL_UART_Receive_IT(&huart1, buffer_rx, 10);
| ^~~~~~~~~
../Core/Src/main.c:60:41: error: expected declaration specifiers or '...' before numeric constant
60 | HAL_UART_Receive_IT(&huart1, buffer_rx, 10);
| ^~
../Core/Src/main.c:61:22: error: expected declaration specifiers or '...' before '&' token
61 | HAL_UART_Transmit_IT(&huart1, buffer_tx, 10);
| ^
../Core/Src/main.c:61:31: error: expected declaration specifiers or '...' before 'buffer_tx'
61 | HAL_UART_Transmit_IT(&huart1, buffer_tx, 10);
| ^~~~~~~~~
../Core/Src/main.c:61:42: error: expected declaration specifiers or '...' before numeric constant
61 | HAL_UART_Transmit_IT(&huart1, buffer_tx, 10);

[JTP1]

Hello. Insert these lines:

HAL_UART_Receive_IT(&huart1, buffer_rx, 10);
HAL_UART_Transmit_IT(&huart1, buffer_tx, 10);

Inside of some function (main for example). Now these are treated as function prototypes since they seems to be missplaced.

[KDJEM.1]

Hello @JZaya.1 ,

I advise you to take a look at this wiki: Getting started with UART

This article explains what is UART and how to use it through examples using  NUCLEO-L476RG boards

• Simple UART communication in polling mode
• UART with Interrupt
• UART with DMA

This wiki can help you to set up UART and generate code with STM32CubeIDE and to use HAL functions.

Thank you.

Kaouthar