Skip to main content
Asarm.1
Asarm.1
Associate
June 7, 2020
Solved

STM32F407 + Freertos + USB VCP + USART IRQ

  • June 7, 2020
  • 1 reply
  • 932 views

Hello,

I am triying to use the STM32F407 with Freertos ,USB VCP and USART interrupts. My problem is when I include USART interrupts with Freertos, the interrupt is always running. I did other project without the Freertos and everything is OK. I leave the code.

THank you

main

#include "main.h"
#include "cmsis_os.h"
#include "usb_device.h"
 
UART_HandleTypeDef huart2;
UART_HandleTypeDef huart6;
 
osThreadId defaultTaskHandle;
 
osMessageQId myQueue01Handle;
osSemaphoreId myBinarySem01Handle;
 
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_USART6_UART_Init(void);
void StartDefaultTask(void const * argument);
void USART6_IRQHandler(void);
 
int main(void){
 HAL_Init();
 SystemClock_Config();
 MX_GPIO_Init();
 MX_USART2_UART_Init();
 MX_USART6_UART_Init();
 
 osSemaphoreDef(myBinarySem01);
 myBinarySem01Handle = osSemaphoreCreate(osSemaphore(myBinarySem01), 1);
osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);
 defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);
 
osKernelStart();
while (1)
 {
 }
}
 
void SystemClock_Config(void)
{
 RCC_OscInitTypeDef RCC_OscInitStruct = {0};
 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
 
 /** Configure the main internal regulator output voltage 
 */
 __HAL_RCC_PWR_CLK_ENABLE();
 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
 /** Initializes the CPU, AHB and APB busses clocks 
 */
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
 RCC_OscInitStruct.HSEState = RCC_HSE_ON;
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
 RCC_OscInitStruct.PLL.PLLM = 4;
 RCC_OscInitStruct.PLL.PLLN = 168;
 RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
 RCC_OscInitStruct.PLL.PLLQ = 7;
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 {
 Error_Handler();
 }
 /** Initializes the CPU, AHB and APB busses clocks 
 */
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
 |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
 
 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
 {
 Error_Handler();
 }
}
 
static void MX_USART2_UART_Init(void)
{
 
 huart2.Instance = USART2;
 huart2.Init.BaudRate = 115200;
 huart2.Init.WordLength = UART_WORDLENGTH_8B;
 huart2.Init.StopBits = UART_STOPBITS_1;
 huart2.Init.Parity = UART_PARITY_NONE;
 huart2.Init.Mode = UART_MODE_TX_RX;
 huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 huart2.Init.OverSampling = UART_OVERSAMPLING_16;
 if (HAL_UART_Init(&huart2) != HAL_OK)
 {
 Error_Handler();
 }
 
 __USART2_CLK_ENABLE();
 HAL_UART_MspInit(&huart2);
 }
 
static void MX_USART6_UART_Init(void)
{
 
 huart6.Instance = USART6;
 huart6.Init.BaudRate = 115200;
 huart6.Init.WordLength = UART_WORDLENGTH_8B;
 huart6.Init.StopBits = UART_STOPBITS_1;
 huart6.Init.Parity = UART_PARITY_NONE;
 huart6.Init.Mode = UART_MODE_TX_RX;
 huart6.Init.HwFlowCtl = UART_HWCONTROL_NONE;
 huart6.Init.OverSampling = UART_OVERSAMPLING_16;
 if (HAL_UART_Init(&huart6) != HAL_OK)
 {
 Error_Handler();
 }
 /* USER CODE BEGIN USART6_Init 2 */
 __USART6_CLK_ENABLE();
 __HAL_UART_ENABLE_IT(&huart6, UART_IT_RXNE);
 HAL_UART_MspInit(&huart6);
}
 
 
static void MX_GPIO_Init(void)
{
 GPIO_InitTypeDef GPIO_InitStruct = {0};
 
 /* GPIO Ports Clock Enable */
 __HAL_RCC_GPIOE_CLK_ENABLE();
 __HAL_RCC_GPIOC_CLK_ENABLE();
 __HAL_RCC_GPIOH_CLK_ENABLE();
 __HAL_RCC_GPIOA_CLK_ENABLE();
 __HAL_RCC_GPIOB_CLK_ENABLE();
 __HAL_RCC_GPIOD_CLK_ENABLE();
 
 /*Configure GPIO pin Output Level */
 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_RESET);
 
 /*Configure GPIO pins : PE2 PE3 PE4 PE5 
 PE6 PE7 PE8 PE9 
 PE10 PE11 PE12 PE13 
 PE14 PE15 PE0 PE1 */
 GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5 
 |GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9 
 |GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13 
 |GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1;
 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
 
 /*Configure GPIO pins : PC13 PC14 PC15 PC0 
 PC1 PC2 PC3 PC4 
 PC5 PC8 PC9 PC10 
 PC11 PC12 */
 GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0 
 |GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4 
 |GPIO_PIN_5|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10 
 |GPIO_PIN_11|GPIO_PIN_12;
 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
 
 /*Configure GPIO pins : PA0 PA1 PA4 PA5 
 PA8 PA9 PA10 PA13 
 PA14 PA15 */
 GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5 
 |GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_13 
 |GPIO_PIN_14|GPIO_PIN_15;
 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
 /*Configure GPIO pins : PA6 PA7 */
 GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
 /*Configure GPIO pins : PB0 PB1 PB2 PB10 
 PB11 PB12 PB13 PB14 
 PB15 PB3 PB4 PB5 
 PB6 PB7 PB8 PB9 */
 GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10 
 |GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14 
 |GPIO_PIN_15|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5 
 |GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 /*Configure GPIO pins : PD8 PD9 PD10 PD11 
 PD12 PD13 PD14 PD15 
 PD0 PD1 PD2 PD3 
 PD4 PD5 PD6 PD7 */
 GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11 
 |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15 
 |GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 
 |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
 GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
 GPIO_InitStruct.Pull = GPIO_NOPULL;
 HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
 
}
 
 
void StartDefaultTask(void const * argument)
{
 MX_USB_DEVICE_Init();
 
 for(;;)
 {
	 if(cont < 27){
		 		 HAL_UART_Transmit(&huart2, &transmitBuffer[cont], 1,10);
 CDC_Transmit_FS("tran",4);
	 	 		 cont++;
	 	 	 }
 osDelay(1000);
 }
 }
 
 
void USART6_IRQHandler(void)
{
 	signed BaseType_t xHigherPriorityTaskWoken;
	uint8_t data[]= " ";
	
	
	 xHigherPriorityTaskWoken = pdFALSE;
	xSemaphoreGiveFromISR( myBinarySem01Handle, &xHigherPriorityTaskWoken );
	portYIELD_FROM_ISR( xHigherPriorityTaskWoken );
 
 
	 if (((USART6->CR1 & USART_CR1_RXNEIE) != 0) &&
	 	 ((USART6->SR & USART_SR_RXNE) != 0)) {
				HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_7);
				HAL_UART_Receive(&huart6, receiveBuffer[rx_caracter_gps], 1,10);
				memcpy(data, receiveBuffer, 1);
				CDC_Transmit_FS(data, 1);
 
			 }
	 HAL_UART_IRQHandler(&huart6);
}
 
 
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
 /* USER CODE BEGIN Callback 0 */
 
 /* USER CODE END Callback 0 */
 if (htim->Instance == TIM1) {
 HAL_IncTick();
 }
 /* USER CODE BEGIN Callback 1 */
 
 /* USER CODE END Callback 1 */
}
 
/**
 * @brief This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void)
{
 /* USER CODE BEGIN Error_Handler_Debug */
 /* User can add his own implementation to report the HAL error return state */
 
 /* USER CODE END Error_Handler_Debug */
}

This topic has been closed for replies.
Best answer by Asarm.1

Solved!!!

Just add __HAL_UART_CLEAR_FLAG(&huart6, UART_IT_RXNE); in the IRQ handler.

But I don't know why the MXcube code doesn't clear the flag when read the data.

1 reply

Asarm.1
Asarm.1AuthorBest answer
Associate
June 7, 2020

Solved!!!

Just add __HAL_UART_CLEAR_FLAG(&huart6, UART_IT_RXNE); in the IRQ handler.

But I don't know why the MXcube code doesn't clear the flag when read the data.

Terms & ConditionsAccessibility statement