SMT32L053 Cube USART ( Nucleo )

[dan2399]

Posted on September 21, 2015 at 16:02

Hi,

I'm trying to send data via USART2 but I can't receive anything. Here is my source code: /* Includes ------------------------------------------------------------------*/ &sharpinclude ''stm32l0xx_hal.h'' /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private variables ---------------------------------------------------------*/ USART_HandleTypeDef husart2; /* USER CODE BEGIN PV */ /* Private variables ---------------------------------------------------------*/ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_USART2_Init(void); void sendOk(void); void sendError(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_USART2_Init();   /* USER CODE BEGIN 2 */  char data[] = ''ABC'';     HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET);   HAL_Delay(3000);   HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET);   /* Infinite loop */   /* USER CODE BEGIN WHILE */   while (1)   {   /* USER CODE END WHILE */       if( HAL_USART_Transmit( &husart2, (uint8_t *) data, 3, 5000 ) != HAL_OK )   {     sendError();   }   else   {     sendOk();   }     HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET);   HAL_Delay(3000);     /* USER CODE BEGIN 3 */   }   /* USER CODE END 3 */ } void sendOk() {     HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET);    HAL_Delay(2000);    HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET); } void sendError() {      for(int i=0; i<3; i++)    {      HAL_Delay(500);      HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_5);    }        HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET); } /** System Clock Configuration */ void SystemClock_Config(void) {   RCC_OscInitTypeDef RCC_OscInitStruct;   RCC_ClkInitTypeDef RCC_ClkInitStruct;   RCC_PeriphCLKInitTypeDef PeriphClkInit;   __PWR_CLK_ENABLE();   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;   RCC_OscInitStruct.MSIState = RCC_MSI_ON;   RCC_OscInitStruct.MSICalibrationValue = 0;   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;   HAL_RCC_OscConfig(&RCC_OscInitStruct);   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;   HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;   PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;   HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK); } /* USART2 init function */ void MX_USART2_Init(void) {     GPIO_InitTypeDef GPIO_InitStruct;     GPIO_InitStruct.Pin = GPIO_PIN_2;     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;     GPIO_InitStruct.Pull = GPIO_PULLUP;     GPIO_InitStruct.Speed = GPIO_SPEED_FAST;     //GPIO_InitStruct.Alternate = GPIO_AF7_USART2;     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);     GPIO_InitStruct.Pin = GPIO_PIN_3;     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;     GPIO_InitStruct.Pull = GPIO_PULLUP;     GPIO_InitStruct.Speed = GPIO_SPEED_FAST;     //GPIO_InitStruct.Alternate = GPIO_AF7_USART2;     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);   husart2.Instance = USART2;   husart2.Init.BaudRate = 9600;   husart2.Init.WordLength = USART_WORDLENGTH_8B;   husart2.Init.StopBits = USART_STOPBITS_1;   husart2.Init.Parity = USART_PARITY_NONE;   husart2.Init.Mode = USART_MODE_TX_RX;   husart2.Init.CLKPolarity = USART_POLARITY_LOW;   husart2.Init.CLKPhase = USART_PHASE_1EDGE;   husart2.Init.CLKLastBit = USART_LASTBIT_DISABLE;   HAL_USART_Init(&husart2); } /** Pinout Configuration */ void MX_GPIO_Init(void) {   /* GPIO Ports Clock Enable */   __GPIOA_CLK_ENABLE();     GPIO_InitTypeDef GPIO_InitStructure;   GPIO_InitStructure.Pin = GPIO_PIN_5;   GPIO_InitStructure.Speed = GPIO_SPEED_FAST;   GPIO_InitStructure.Pull = GPIO_PULLUP;   GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;     HAL_GPIO_Init(GPIOA,&GPIO_InitStructure); } /* USER CODE BEGIN 4 */ /* USER CODE END 4 */ &sharpifdef 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 */ } &sharpendif /**   * @}   */ /**   * @} */ I checked twice the terminal baud rate, parity bits, port. Every thin is configured Ok but I don't receive any data. #stm32l0-usart-cube-nucle

[Nesrine M_O]

Posted on September 22, 2015 at 12:33

Hi,

I'd highly recommend you to start from UART examples under STM32Cube L0 package: STM32Cube_FW_L0_V1.1.0\Projects\STM32L053R8-Nucleo\Examples\UART, it can be very useful.-Syrine –

[dan2399]

Posted on September 23, 2015 at 12:42

I started with examples but I can't understand how to configure USART1 to send data over the on board USB connector.