The first has an IRQ Handler, and the second initializes the UART, its clocks, and pins, for your board.
STM32Cube_FW_F4_V1.24.2\Projects\STM32F411E-Discovery\Examples\UART\UART_TwoBoards_ComIT\Src\stm32f4xx_it.c
void USARTx_IRQHandler(void)
{
HAL_UART_IRQHandler(& UartHandle);
}
STM32Cube_FW_F4_V1.24.2\Projects\STM32F411E-Discovery\Examples\UART\UART_TwoBoards_ComIT\Inc\main.h
/* User can use this section to tailor USARTx/UARTx instance used and associated
resources */
/* Definition for USARTx clock resources */
#define USARTx USART2
#define USARTx_CLK_ENABLE() __HAL_RCC_USART2_CLK_ENABLE();
#define USARTx_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define USARTx_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define USARTx_FORCE_RESET() __HAL_RCC_USART2_FORCE_RESET()
#define USARTx_RELEASE_RESET() __HAL_RCC_USART2_RELEASE_RESET()
/* Definition for USARTx Pins */
#define USARTx_TX_PIN GPIO_PIN_2
#define USARTx_TX_GPIO_PORT GPIOA
#define USARTx_TX_AF GPIO_AF7_USART2
#define USARTx_RX_PIN GPIO_PIN_3
#define USARTx_RX_GPIO_PORT GPIOA
#define USARTx_RX_AF GPIO_AF7_USART2
/* Definition for USARTx's NVIC */
#define USARTx_IRQn USART2_IRQn
#define USARTx_IRQHandler USART2_IRQHandler
STM32Cube_FW_F4_V1.24.2\Projects\STM32F411E-Discovery\Examples\UART\UART_TwoBoards_ComIT\Src\main.c
/**
* @brief Tx Transfer completed callback
* @param UartHandle: UART handle.
* @note This example shows a simple way to report end of IT Tx transfer, and
* you can add your own implementation.
* @retval None
*/
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
{
/* Set transmission flag: transfer complete*/
UartReady = SET;
/* Turn LED6 on: Transfer in transmission process is correct */
BSP_LED_On(LED6);
}
/**
* @brief Rx Transfer completed callback
* @param UartHandle: UART handle
* @note This example shows a simple way to report end of IT Rx transfer, and
* you can add your own implementation.
* @retval None
*/
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
{
/* Set transmission flag: transfer complete*/
UartReady = SET;
/* Turn LED4 on: Transfer in reception process is correct */
BSP_LED_On(LED4);
}
/**
* @brief UART error callbacks
* @param UartHandle: UART handle
* @note This example shows a simple way to report transfer error, and you can
* add your own implementation.
* @retval None
*/
void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
{
/* Turn LED3 on: Transfer error in reception/transmission process */
BSP_LED_On(LED3);
}
