【NUCLEO-U575ZI-Q测评】串口2

#include "main.h"



/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */



/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */



/* USER CODE END PTD */



/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

#define TRANSMITTER_BOARD

/* USER CODE END PD */



/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */



/* USER CODE END PM */



/* Private variables ---------------------------------------------------------*/



UART_HandleTypeDef huart2;



/* USER CODE BEGIN PV */

__IO uint32_t UserButtonStatus = 0;  /* set to 1 after User Button interrupt  */



/* Buffer used for transmission */

uint8_t aTxBuffer[] = " **** UART_TwoBoards_ComPolling ****  **** UART_TwoBoards_ComPolling ****  **** UART_TwoBoards_ComPolling **** ";



/* Buffer used for reception */

uint8_t aRxBuffer[RXBUFFERSIZE];



/* USER CODE END PV */



/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void SystemPower_Config(void);

static void MX_GPIO_Init(void);

static void MX_ICACHE_Init(void);

static void MX_USART2_UART_Init(void);

/* USER CODE BEGIN PFP */

static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength);

/* USER CODE END PFP */



/* Private user code ---------------------------------------------------------*/

/* USER CODE BEGIN 0 */



/* USER CODE END 0 */



/**

  * [url=home.php?mod=space&uid=247401]@brief[/url]  The application entry point.

  * @retval int

  */

int main(void)

{

  /* USER CODE BEGIN 1 */

  /* STM32U5xx HAL library initialization:

       - Configure the Flash prefetch

       - Configure the Systick to generate an interrupt each 1 msec

       - Set NVIC Group Priority to 3

       - Low Level Initialization

     */

  /* USER CODE END 1 */



  /* MCU Configuration--------------------------------------------------------*/



  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

  HAL_Init();



  /* USER CODE BEGIN Init */



  /* USER CODE END Init */



  /* Configure the system clock */

  SystemClock_Config();



  /* Configure the System Power */

  SystemPower_Config();



  /* USER CODE BEGIN SysInit */



  /* USER CODE END SysInit */



  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_ICACHE_Init();

  MX_USART2_UART_Init();

  /* USER CODE BEGIN 2 */

  /* Configure LED2 and LED3 */

  BSP_LED_Init(LED2);

  BSP_LED_Init(LED3);



#ifdef TRANSMITTER_BOARD



  /* Configure User push-button in Interrupt mode */

  BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);



  /* Wait for User push-button press before starting the Communication.

     In the meantime, LED2 is blinking */

  while (UserButtonStatus == 0)

  {

    /* Toggle LED2*/

    BSP_LED_Toggle(LED2);

    HAL_Delay(100);

  }



  BSP_LED_Off(LED2);



  /* The board sends the message and expects to receive it back */



  /*##-1- Start the transmission process #####################################*/

  /* While the UART in reception process, user can transmit data through

     "aTxBuffer" buffer */

  if (HAL_UART_Transmit(&huart2, (uint8_t *)aTxBuffer, TXBUFFERSIZE, 5000) != HAL_OK)

  {

    Error_Handler();

  }





  /*##-2- Put UART peripheral in reception process ###########################*/

  if (HAL_UART_Receive(&huart2, (uint8_t *)aRxBuffer, RXBUFFERSIZE, 5000) != HAL_OK)

  {

    Error_Handler();

  }



#else



  /* The board receives the message and sends it back */



  /*##-1- Put UART peripheral in reception process ###########################*/

  if (HAL_UART_Receive(&huart2, (uint8_t *)aRxBuffer, RXBUFFERSIZE, 0x1FFFFFF) != HAL_OK)

  {

    Error_Handler();

  }



  /*##-2- Start the transmission process #####################################*/

  /* While the UART in reception process, user can transmit data through

     "aTxBuffer" buffer */

  if (HAL_UART_Transmit(&huart2, (uint8_t *)aTxBuffer, TXBUFFERSIZE, 5000) != HAL_OK)

  {

    Error_Handler();

  }



#endif /* TRANSMITTER_BOARD */



  /*##-3- Compare the sent and received buffers ##############################*/

  if (Buffercmp((uint8_t *)aTxBuffer, (uint8_t *)aRxBuffer, RXBUFFERSIZE))

  {

    Error_Handler();

  }



  /* Turn on LED2 if test passes then enter infinite loop */

  BSP_LED_On(LED2);

  /* USER CODE END 2 */



  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    /* USER CODE END WHILE */



    /* USER CODE BEGIN 3 */



  }

  /* USER CODE END 3 */

}



/**

  * [url=home.php?mod=space&uid=247401]@brief[/url] System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};



  /** Configure the main internal regulator output voltage

  */

  if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)

  {

    Error_Handler();

  }



  /** Initializes the CPU, AHB and APB busses clocks

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;

  RCC_OscInitStruct.MSIState = RCC_MSI_ON;

  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;

  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;

  RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;

  RCC_OscInitStruct.PLL.PLLM = 1;

  RCC_OscInitStruct.PLL.PLLN = 80;

  RCC_OscInitStruct.PLL.PLLP = 2;

  RCC_OscInitStruct.PLL.PLLQ = 2;

  RCC_OscInitStruct.PLL.PLLR = 2;

  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;

  RCC_OscInitStruct.PLL.PLLFRACN = 0;

  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_CLOCKTYPE_PCLK3;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;



  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)

  {

    Error_Handler();

  }

}



/**

  * @brief Power Configuration

  * @retval None

  */

static void SystemPower_Config(void)

{



  /*

   * Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral

   */

  HAL_PWREx_DisableUCPDDeadBattery();



  /*

   * Switch to SMPS regulator instead of LDO

   */

  if (HAL_PWREx_ConfigSupply(PWR_SMPS_SUPPLY) != HAL_OK)

  {

    Error_Handler();

  }

}



/**

  * @brief ICACHE Initialization Function

  * @param None

  * @retval None

  */

static void MX_ICACHE_Init(void)

{



  /* USER CODE BEGIN ICACHE_Init 0 */



  /* USER CODE END ICACHE_Init 0 */



  /* USER CODE BEGIN ICACHE_Init 1 */



  /* USER CODE END ICACHE_Init 1 */



  /** Enable instruction cache in 1-way (direct mapped cache)

  */

  if (HAL_ICACHE_ConfigAssociativityMode(ICACHE_1WAY) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_ICACHE_Enable() != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN ICACHE_Init 2 */



  /* USER CODE END ICACHE_Init 2 */



}



/**

  * @brief USART2 Initialization Function

  * @param None

  * @retval None

  */

static void MX_USART2_UART_Init(void)

{



  /* USER CODE BEGIN USART2_Init 0 */



  /* USER CODE END USART2_Init 0 */



  /* USER CODE BEGIN USART2_Init 1 */



  /* USER CODE END USART2_Init 1 */

  huart2.Instance = USART2;

  huart2.Init.BaudRate = 9600;

  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;

  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;

  huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;

  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

  if (HAL_UART_Init(&huart2) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)

  {

    Error_Handler();

  }

  if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN USART2_Init 2 */



  /* USER CODE END USART2_Init 2 */



}



/**

  * @brief GPIO Initialization Function

  * @param None

  * @retval None

  */

static void MX_GPIO_Init(void)

{



  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOD_CLK_ENABLE();



}



/* USER CODE BEGIN 4 */

/**

  * @brief  UART error callbacks

  * @param  UartHandle: UART handle

  * [url=home.php?mod=space&uid=536309]@NOTE[/url]   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)

{

  Error_Handler();

}





/**

  * @brief EXTI line detection callbacks

  * @param GPIO_Pin: Specifies the pins connected EXTI line

  * @retval None

  */

void HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin)

{

  if (GPIO_Pin == BUTTON_USER_PIN)

  {

    UserButtonStatus = 1;

  }

}



/**

  * @brief  Compares two buffers.

  * @param  pBuffer1, pBuffer2: buffers to be compared.

  * @param  BufferLength: buffer's length

  * @retval 0  : pBuffer1 identical to pBuffer2

  *         >0 : pBuffer1 differs from pBuffer2

  */

static uint16_t Buffercmp(uint8_t *pBuffer1, uint8_t *pBuffer2, uint16_t BufferLength)

{

  while (BufferLength--)

  {

    if ((*pBuffer1) != *pBuffer2)

    {

      return BufferLength;

    }

    pBuffer1++;

    pBuffer2++;

  }



  return 0;

}



/* USER CODE END 4 */



/**

  * @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 */



  /* Turn LED3 on */

  BSP_LED_On(LED3);

  while (1);

  /* USER CODE END Error_Handler_Debug */

}



#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) */



  /* Infinite loop */

  while (1)

  {

  }

  /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */