usart communication

[anjana087]

Posted on September 24, 2016 at 08:46

Hi everyone!

I am doing a project using the HY-MiniSTM32V board.the software used are STM32CubeMX and the IDE is Atollic TrueStudio. I wrote the following code for sending data to the pc from the board using usart.But i cannot see any output in the hyperterminal.Can anyone please help me.I am totally new to this board and software. Eagerly waiting for the reply. /* Includes ------------------------------------------------------------------*/ #include ''stm32f1xx_hal.h'' /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private variables ---------------------------------------------------------*/ UART_HandleTypeDef huart1; /* USER CODE BEGIN PV */ /* Private variables ---------------------------------------------------------*/ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); void Error_Handler(void); static void MX_GPIO_Init(void); static void MX_USART1_UART_Init(void); /* USER CODE BEGIN PFP */ /* Private function prototypes -----------------------------------------------*/ /* USER CODE END PFP */ /* USER CODE BEGIN 0 */ /* USER CODE END 0 */ int main(void) {   /* USER CODE BEGIN 1 */   /* USER CODE END 1 */   /* MCU Configuration----------------------------------------------------------*/   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */   HAL_Init();   /* Configure the system clock */   SystemClock_Config();   /* Initialize all configured peripherals */   MX_GPIO_Init();   MX_USART1_UART_Init();   /* USER CODE BEGIN 2 */   uint8_t data[]={48,49,50,51,52,53,54,55};   /* USER CODE END 2 */   /* Infinite loop */   /* USER CODE BEGIN WHILE */   while (1)   {   /* USER CODE END WHILE */   /* USER CODE BEGIN 3 */       if(HAL_UART_Transmit(&huart1,data,8,1000))    {      HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin);      HAL_Delay(1000);    }   }   /* USER CODE END 3 */ } /** System Clock Configuration */ void SystemClock_Config(void) {   RCC_OscInitTypeDef RCC_OscInitStruct;   RCC_ClkInitTypeDef RCC_ClkInitStruct;   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;   RCC_OscInitStruct.HSIState = RCC_HSI_ON;   RCC_OscInitStruct.HSICalibrationValue = 16;   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)   {     Error_Handler();   }   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)   {     Error_Handler();   }   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);   /* SysTick_IRQn interrupt configuration */   HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); } /* USART1 init function */ static void MX_USART1_UART_Init(void) {   huart1.Instance = USART1;   huart1.Init.BaudRate = 115200;   huart1.Init.WordLength = UART_WORDLENGTH_8B;   huart1.Init.StopBits = UART_STOPBITS_1;   huart1.Init.Parity = UART_PARITY_NONE;   huart1.Init.Mode = UART_MODE_TX_RX;   huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;   huart1.Init.OverSampling = UART_OVERSAMPLING_16;   if (HAL_UART_Init(&huart1) != HAL_OK)   {     Error_Handler();   } } /** Configure pins as         * Analog         * Input         * Output         * EVENT_OUT         * EXTI */ static void MX_GPIO_Init(void) {   GPIO_InitTypeDef GPIO_InitStruct;   /* GPIO Ports Clock Enable */   __HAL_RCC_GPIOB_CLK_ENABLE();   __HAL_RCC_GPIOA_CLK_ENABLE();   /*Configure GPIO pin Output Level */   HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);   /*Configure GPIO pin : LED1_Pin */   GPIO_InitStruct.Pin = LED1_Pin;   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;   HAL_GPIO_Init(LED1_GPIO_Port, &GPIO_InitStruct); } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ /**   * @brief  This function is executed in case of error occurrence.   * @param  None   * @retval None   */ void Error_Handler(void) {   /* USER CODE BEGIN Error_Handler */   /* User can add his own implementation to report the HAL error return state */   while(1)   {   }   /* USER CODE END Error_Handler */ } #ifdef USE_FULL_ASSERT /**    * @brief Reports the name of the source file and the source line number    * where the assert_param error has occurred.    * @param file: pointer to the source file name    * @param line: assert_param error line source number    * @retval None    */ void assert_failed(uint8_t* file, uint32_t line) {   /* USER CODE BEGIN 6 */   /* User can add his own implementation to report the file name and line number,     ex: printf(''Wrong parameters value: file %s on line %d\r\n'', file, line) */   /* USER CODE END 6 */ } #endif /**   * @}   */ /**   * @} */

[Walid FTITI_O]

Posted on September 27, 2016 at 17:54

Hi m.anjana,

Check if the host (hyperterminal) and the STM32 UART configurationhave the same parameters (parity , baudrate...). Check the hardware connections. You can have a look to UART example inside the STM32cube to compare all user file with yours. -Hannibal-

[anjana087]

Posted on September 30, 2016 at 09:08

Hi Hannibal

Thank you for the help,i checked the parameters, the baud rate assigned was different. now it worked.