Having problem with UART communication in Interrupt mode
I am doing a project on STM32H747 DISCO Discovery board involving UART. I am sending one string continuoulsy with 5 seconds delay from esp32 to stm32. I am able to receive the string in polling mode but I am not able to receive the string in Interrupt mode.
I am using UART 8 and I have configure GPIO for the pins as follows:
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOJ_CLK_ENABLE();
/*Configure GPIO pin: PJ8 For D1 pin for TX */
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
//GPIO_InitStruct.Pull = GPIO_NOPULL; //pullup
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_UART8;
HAL_GPIO_Init(GPIOJ, &GPIO_InitStruct);
/*Configure GPIO pin: PJ9 For D0 pin for RX */
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; //MODE_ALTERNATE?
//GPIO_InitStruct.Pull = GPIO_NOPULL; //or NOPULL?
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF8_UART8;
HAL_GPIO_Init(GPIOJ, &GPIO_InitStruct);
}
I have initialised the UART as follow:
void MX_UART8_Init(void){
//Peripheral clock enable
__HAL_RCC_UART8_CLK_ENABLE();
__HAL_UART_CLEAR_IDLEFLAG(&huart8);
__HAL_UART_ENABLE_IT(&huart8, UART_IT_IDLE); //Enable serial port idle interrupt
huart8.Instance = UART8;
huart8.Init.BaudRate = 115200;
huart8.Init.WordLength = UART_WORDLENGTH_8B;
huart8.Init.StopBits = UART_STOPBITS_1;
huart8.Init.Parity = UART_PARITY_NONE;
huart8.Init.Mode = UART_MODE_TX_RX;
huart8.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart8.Init.OverSampling = UART_OVERSAMPLING_16;
huart8.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart8.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart8.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
HAL_UART_Init(&huart8);
if (HAL_UART_Init(&huart8) != HAL_OK)
{
Error_Handler();
}
//UART8 Idle Interrupt Configuration
HAL_NVIC_SetPriority(UART8_IRQn, 1, 1);
HAL_NVIC_EnableIRQ(UART8_IRQn);
}
I called the function below before while(1) loop inside main:
HAL_UART_Receive_IT (&huart8, (uint8_t*) &Rx_data, sizeof(Rx_data));
I called this complete interrupt function and tried to print some string to terminal once it is triggered.
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if(huart->Instance == UART8 ){
HAL_UART_Receive_IT(&huart8, (uint8_t*) &Rx_data, sizeof(Rx_data));
HAL_UART_Transmit(&huart3,(void*)"Data Received\r\n",15, 100);
}
}
Do I need to enable or configure something somewhere else in the library as well to make the interrupt work. I could not found any document regarding it . The only thing that I have found while surfing on the internet and example projects are the things that I have explained above.
Could you please help me out with it and let me know the problem as I am having problem with such a simple thing.