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[STM32U5] 【NUCLEO-U575ZI-Q测评】串口2

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 楼主| 比神乐 发表于 2023-2-28 11:45 | 显示全部楼层 |阅读模式
NUC, Nucleo, 串口
本帖最后由 比神乐 于 2023-2-28 11:48 编辑

今天搞了一下串口2，发送PD5,接收PD6。
原理图：
1.jpg
代码：
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  1. #include "main.h"
    


  2. 

  3. /* Private includes ----------------------------------------------------------*/
    

  4. /* USER CODE BEGIN Includes */
    

  5. /* USER CODE END Includes */
    


  6. 

  7. /* Private typedef -----------------------------------------------------------*/
    

  8. /* USER CODE BEGIN PTD */
    


  9. 

  10. /* USER CODE END PTD */
    


  11. 

  12. /* Private define ------------------------------------------------------------*/
    

  13. /* USER CODE BEGIN PD */
    

  14. #define TRANSMITTER_BOARD
    

  15. /* USER CODE END PD */
    


  16. 

  17. /* Private macro -------------------------------------------------------------*/
    

  18. /* USER CODE BEGIN PM */
    


  19. 

  20. /* USER CODE END PM */
    


  21. 

  22. /* Private variables ---------------------------------------------------------*/
    


  23. 

  24. UART_HandleTypeDef huart2;
    


  25. 

  26. /* USER CODE BEGIN PV */
    

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


  28. 

  29. /* Buffer used for transmission */
    

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


  31. 

  32. /* Buffer used for reception */
    

  33. uint8_t aRxBuffer[RXBUFFERSIZE];
    


  34. 

  35. /* USER CODE END PV */
    


  36. 

  37. /* Private function prototypes -----------------------------------------------*/
    

  38. void SystemClock_Config(void);
    

  39. static void SystemPower_Config(void);
    

  40. static void MX_GPIO_Init(void);
    

  41. static void MX_ICACHE_Init(void);
    

  42. static void MX_USART2_UART_Init(void);
    

  43. /* USER CODE BEGIN PFP */
    

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

  45. /* USER CODE END PFP */
    


  46. 

  47. /* Private user code ---------------------------------------------------------*/
    

  48. /* USER CODE BEGIN 0 */
    


  49. 

  50. /* USER CODE END 0 */
    


  51. 

  52. /**
    

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

  54.   * @retval int
    

  55.   */
    

  56. int main(void)
    

  57. {
    

  58.   /* USER CODE BEGIN 1 */
    

  59.   /* STM32U5xx HAL library initialization:
    

  60.        - Configure the Flash prefetch
    

  61.        - Configure the Systick to generate an interrupt each 1 msec
    

  62.        - Set NVIC Group Priority to 3
    

  63.        - Low Level Initialization
    

  64.      */
    

  65.   /* USER CODE END 1 */
    


  66. 

  67.   /* MCU Configuration--------------------------------------------------------*/
    


  68. 

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

  70.   HAL_Init();
    


  71. 

  72.   /* USER CODE BEGIN Init */
    


  73. 

  74.   /* USER CODE END Init */
    


  75. 

  76.   /* Configure the system clock */
    

  77.   SystemClock_Config();
    


  78. 

  79.   /* Configure the System Power */
    

  80.   SystemPower_Config();
    


  81. 

  82.   /* USER CODE BEGIN SysInit */
    


  83. 

  84.   /* USER CODE END SysInit */
    


  85. 

  86.   /* Initialize all configured peripherals */
    

  87.   MX_GPIO_Init();
    

  88.   MX_ICACHE_Init();
    

  89.   MX_USART2_UART_Init();
    

  90.   /* USER CODE BEGIN 2 */
    

  91.   /* Configure LED2 and LED3 */
    

  92.   BSP_LED_Init(LED2);
    

  93.   BSP_LED_Init(LED3);
    


  94. 

  95. #ifdef TRANSMITTER_BOARD
    


  96. 

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

  98.   BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);
    


  99. 

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

  101.      In the meantime, LED2 is blinking */
    

  102.   while (UserButtonStatus == 0)
    

  103.   {
    

  104.     /* Toggle LED2*/
    

  105.     BSP_LED_Toggle(LED2);
    

  106.     HAL_Delay(100);
    

  107.   }
    


  108. 

  109.   BSP_LED_Off(LED2);
    


  110. 

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


  112. 

  113.   /*##-1- Start the transmission process #####################################*/
    

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

  115.      "aTxBuffer" buffer */
    

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

  117.   {
    

  118.     Error_Handler();
    

  119.   }
    


  120. 


  121. 

  122.   /*##-2- Put UART peripheral in reception process ###########################*/
    

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

  124.   {
    

  125.     Error_Handler();
    

  126.   }
    


  127. 

  128. #else
    


  129. 

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


  131. 

  132.   /*##-1- Put UART peripheral in reception process ###########################*/
    

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

  134.   {
    

  135.     Error_Handler();
    

  136.   }
    


  137. 

  138.   /*##-2- Start the transmission process #####################################*/
    

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

  140.      "aTxBuffer" buffer */
    

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

  142.   {
    

  143.     Error_Handler();
    

  144.   }
    


  145. 

  146. #endif /* TRANSMITTER_BOARD */
    


  147. 

  148.   /*##-3- Compare the sent and received buffers ##############################*/
    

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

  150.   {
    

  151.     Error_Handler();
    

  152.   }
    


  153. 

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

  155.   BSP_LED_On(LED2);
    

  156.   /* USER CODE END 2 */
    


  157. 

  158.   /* Infinite loop */
    

  159.   /* USER CODE BEGIN WHILE */
    

  160.   while (1)
    

  161.   {
    

  162.     /* USER CODE END WHILE */
    


  163. 

  164.     /* USER CODE BEGIN 3 */
    


  165. 

  166.   }
    

  167.   /* USER CODE END 3 */
    

  168. }
    


  169. 

  170. /**
    

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

  172.   * @retval None
    

  173.   */
    

  174. void SystemClock_Config(void)
    

  175. {
    

  176.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    

  177.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    


  178. 

  179.   /** Configure the main internal regulator output voltage
    

  180.   */
    

  181.   if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
    

  182.   {
    

  183.     Error_Handler();
    

  184.   }
    


  185. 

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

  187.   */
    

  188.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
    

  189.   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
    

  190.   RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
    

  191.   RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_4;
    

  192.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    

  193.   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
    

  194.   RCC_OscInitStruct.PLL.PLLMBOOST = RCC_PLLMBOOST_DIV1;
    

  195.   RCC_OscInitStruct.PLL.PLLM = 1;
    

  196.   RCC_OscInitStruct.PLL.PLLN = 80;
    

  197.   RCC_OscInitStruct.PLL.PLLP = 2;
    

  198.   RCC_OscInitStruct.PLL.PLLQ = 2;
    

  199.   RCC_OscInitStruct.PLL.PLLR = 2;
    

  200.   RCC_OscInitStruct.PLL.PLLRGE = RCC_PLLVCIRANGE_0;
    

  201.   RCC_OscInitStruct.PLL.PLLFRACN = 0;
    

  202.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    

  203.   {
    

  204.     Error_Handler();
    

  205.   }
    


  206. 

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

  208.   */
    

  209.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
    

  210.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
    

  211.                               |RCC_CLOCKTYPE_PCLK3;
    

  212.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    

  213.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    

  214.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
    

  215.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    

  216.   RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
    


  217. 

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

  219.   {
    

  220.     Error_Handler();
    

  221.   }
    

  222. }
    


  223. 

  224. /**
    

  225.   * @brief Power Configuration
    

  226.   * @retval None
    

  227.   */
    

  228. static void SystemPower_Config(void)
    

  229. {
    


  230. 

  231.   /*
    

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

  233.    */
    

  234.   HAL_PWREx_DisableUCPDDeadBattery();
    


  235. 

  236.   /*
    

  237.    * Switch to SMPS regulator instead of LDO
    

  238.    */
    

  239.   if (HAL_PWREx_ConfigSupply(PWR_SMPS_SUPPLY) != HAL_OK)
    

  240.   {
    

  241.     Error_Handler();
    

  242.   }
    

  243. }
    


  244. 

  245. /**
    

  246.   * @brief ICACHE Initialization Function
    

  247.   * @param None
    

  248.   * @retval None
    

  249.   */
    

  250. static void MX_ICACHE_Init(void)
    

  251. {
    


  252. 

  253.   /* USER CODE BEGIN ICACHE_Init 0 */
    


  254. 

  255.   /* USER CODE END ICACHE_Init 0 */
    


  256. 

  257.   /* USER CODE BEGIN ICACHE_Init 1 */
    


  258. 

  259.   /* USER CODE END ICACHE_Init 1 */
    


  260. 

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

  262.   */
    

  263.   if (HAL_ICACHE_ConfigAssociativityMode(ICACHE_1WAY) != HAL_OK)
    

  264.   {
    

  265.     Error_Handler();
    

  266.   }
    

  267.   if (HAL_ICACHE_Enable() != HAL_OK)
    

  268.   {
    

  269.     Error_Handler();
    

  270.   }
    

  271.   /* USER CODE BEGIN ICACHE_Init 2 */
    


  272. 

  273.   /* USER CODE END ICACHE_Init 2 */
    


  274. 

  275. }
    


  276. 

  277. /**
    

  278.   * @brief USART2 Initialization Function
    

  279.   * @param None
    

  280.   * @retval None
    

  281.   */
    

  282. static void MX_USART2_UART_Init(void)
    

  283. {
    


  284. 

  285.   /* USER CODE BEGIN USART2_Init 0 */
    


  286. 

  287.   /* USER CODE END USART2_Init 0 */
    


  288. 

  289.   /* USER CODE BEGIN USART2_Init 1 */
    


  290. 

  291.   /* USER CODE END USART2_Init 1 */
    

  292.   huart2.Instance = USART2;
    

  293.   huart2.Init.BaudRate = 9600;
    

  294.   huart2.Init.WordLength = UART_WORDLENGTH_8B;
    

  295.   huart2.Init.StopBits = UART_STOPBITS_1;
    

  296.   huart2.Init.Parity = UART_PARITY_NONE;
    

  297.   huart2.Init.Mode = UART_MODE_TX_RX;
    

  298.   huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    

  299.   huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    

  300.   huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
    

  301.   huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
    

  302.   huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    

  303.   if (HAL_UART_Init(&huart2) != HAL_OK)
    

  304.   {
    

  305.     Error_Handler();
    

  306.   }
    

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

  308.   {
    

  309.     Error_Handler();
    

  310.   }
    

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

  312.   {
    

  313.     Error_Handler();
    

  314.   }
    

  315.   if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
    

  316.   {
    

  317.     Error_Handler();
    

  318.   }
    

  319.   /* USER CODE BEGIN USART2_Init 2 */
    


  320. 

  321.   /* USER CODE END USART2_Init 2 */
    


  322. 

  323. }
    


  324. 

  325. /**
    

  326.   * @brief GPIO Initialization Function
    

  327.   * @param None
    

  328.   * @retval None
    

  329.   */
    

  330. static void MX_GPIO_Init(void)
    

  331. {
    


  332. 

  333.   /* GPIO Ports Clock Enable */
    

  334.   __HAL_RCC_GPIOD_CLK_ENABLE();
    


  335. 

  336. }
    


  337. 

  338. /* USER CODE BEGIN 4 */
    

  339. /**
    

  340.   * @brief  UART error callbacks
    

  341.   * @param  UartHandle: UART handle
    

  342.   * [url=home.php?mod=space&uid=536309]@NOTE[/url]   This example shows a simple way to report transfer error, and you can
    

  343.   *         add your own implementation.
    

  344.   * @retval None
    

  345.   */
    

  346. void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
    

  347. {
    

  348.   Error_Handler();
    

  349. }
    


  350. 


  351. 

  352. /**
    

  353.   * @brief EXTI line detection callbacks
    

  354.   * @param GPIO_Pin: Specifies the pins connected EXTI line
    

  355.   * @retval None
    

  356.   */
    

  357. void HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin)
    

  358. {
    

  359.   if (GPIO_Pin == BUTTON_USER_PIN)
    

  360.   {
    

  361.     UserButtonStatus = 1;
    

  362.   }
    

  363. }
    


  364. 

  365. /**
    

  366.   * @brief  Compares two buffers.
    

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

  368.   * @param  BufferLength: buffer's length
    

  369.   * @retval 0  : pBuffer1 identical to pBuffer2
    

  370.   *         >0 : pBuffer1 differs from pBuffer2
    

  371.   */
    

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

  373. {
    

  374.   while (BufferLength--)
    

  375.   {
    

  376.     if ((*pBuffer1) != *pBuffer2)
    

  377.     {
    

  378.       return BufferLength;
    

  379.     }
    

  380.     pBuffer1++;
    

  381.     pBuffer2++;
    

  382.   }
    


  383. 

  384.   return 0;
    

  385. }
    


  386. 

  387. /* USER CODE END 4 */
    


  388. 

  389. /**
    

  390.   * @brief  This function is executed in case of error occurrence.
    

  391.   * @retval None
    

  392.   */
    

  393. void Error_Handler(void)
    

  394. {
    

  395.   /* USER CODE BEGIN Error_Handler_Debug */
    

  396.   /* User can add his own implementation to report the HAL error return state */
    


  397. 

  398.   /* Turn LED3 on */
    

  399.   BSP_LED_On(LED3);
    

  400.   while (1);
    

  401.   /* USER CODE END Error_Handler_Debug */
    

  402. }
    


  403. 

  404. #ifdef  USE_FULL_ASSERT
    

  405. /**
    

  406.   * @brief  Reports the name of the source file and the source line number
    

  407.   *         where the assert_param error has occurred.
    

  408.   * @param  file: pointer to the source file name
    

  409.   * @param  line: assert_param error line source number
    

  410.   * @retval None
    

  411.   */
    

  412. void assert_failed(uint8_t *file, uint32_t line)
    

  413. {
    

  414.   /* USER CODE BEGIN 6 */
    

  415.   /* User can add his own implementation to report the file name and line number,
    

  416.      ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    


  417. 

  418.   /* Infinite loop */
    

  419.   while (1)
    

  420.   {
    

  421.   }
    

  422.   /* USER CODE END 6 */
    

  423. }
    

  424. #endif /* USE_FULL_ASSERT */
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