STM32 - UART Ausgabe - Wie richtig?

/* USER CODE BEGIN Header */

/**

  ******************************************************************************

  * @file           : main.c

  * @brief          : Main program body

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2023 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

  ******************************************************************************

  */

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"

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

/* USER CODE BEGIN Includes */

#include "string.h"

/* USER CODE END Includes */

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

/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

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

/* USER CODE BEGIN PD */

/* USER CODE END PD */

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

/* USER CODE BEGIN PM */

/* USER CODE END PM */

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

UART_HandleTypeDef huart2;

DMA_HandleTypeDef hdma_usart2_rx;

DMA_HandleTypeDef hdma_usart2_tx;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

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

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_DMA_Init(void);

static void MX_USART2_UART_Init(void);

/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

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

/* USER CODE BEGIN 0 */

#define RxBuf_Size 10

#define MainBuf_Size 20

uint8_t RxBuf[RxBuf_Size];

uint8_t MainBuf[MainBuf_Size];

void HAL_UARTEx_RxEventCallback( UART_HandleTypeDef *huart, uint16_t Size ){

  //if(huart -> Instance == USART2 ){

    for(int i=0;i < sizeof(MainBuf) ; i++){

        MainBuf[i] = '0';

    }

    memcpy ( MainBuf, RxBuf, Size );

    for(int i=0;i < Size ; i++){

      RxBuf[i] = '0';

    }

      HAL_UARTEx_ReceiveToIdle_DMA(&huart2, RxBuf, RxBuf_Size);

      __HAL_DMA_DISABLE_IT(&hdma_usart2_rx,DMA_IT_HT);

  //}

}

/* USER CODE END 0 */

/**

  * @brief  The application entry point.

  * @retval int

  */

int main(void)

{

  int flag =0;

  int flag2 =0;

  int iState =0;

  uint32_t t1;

  uint32_t t2;

  uint32_t dt;

  /* USER CODE BEGIN 1 */

  /* 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();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */

  MX_GPIO_Init();

  MX_DMA_Init();

  MX_USART2_UART_Init();

  /* USER CODE BEGIN 2 */

  HAL_UARTEx_ReceiveToIdle_DMA(&huart2, RxBuf, RxBuf_Size);

    __HAL_DMA_DISABLE_IT(&hdma_usart2_rx,DMA_IT_HT);

    HAL_UART_Transmit_DMA(&huart2, "Hallo", 5);

  /* USER CODE END 2 */

  /* Infinite loop */

  /* USER CODE BEGIN WHILE */

  while (1)

  {

    switch(iState){

    case 0:

      HAL_UART_Transmit_DMA(&huart2, "Welcome! \n\r", 15);

      iState = 5;

      break;

    case 5:

      HAL_UART_Transmit_DMA(&huart2, "Step:5 \n\r", 15);

      iState = 10;

      break;

    case 10:

      t1 = HAL_GetTick();

      iState = 15;

      break;

    case 15:

      HAL_UART_Transmit_DMA(&huart2, "Waiting... \n\r", 15);

      iState = 20;

      break;

    case 20:

      t2 = HAL_GetTick();

      dt = t2-t1;

      if(dt > 10000){

        iState = 25;

      }

      break;

    case 25:

      HAL_UART_Transmit_DMA(&huart2, "Choose >1< \n\r", 15);

      //HAL_UART_Transmit(&huart2, "Choose >1< \n\r", 15, 1000);

      iState = 30;

      break;

    case 30:

      //HAL_UART_Transmit_DMA(&huart2, "Step:3 \n\r", 15);

      if(MainBuf[0] == '1'){

        iState = 300;

      }

      //xUartRcvDatProcessed = 1;

      break;

    case 300:

      HAL_UART_Transmit_DMA(&huart2, "Step:300 \n\r", 15);

      //HAL_UART_Transmit(&huart2, "Works! \n\r", 15,1000);

      iState = 500;

      break;

    case 500:

      HAL_UART_Transmit_DMA(&huart2, "Step:500 \n\r", 15);

      iState = 501;

      break;

    case 501:

      break;

    }

    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */

  }

  /* USER CODE END 3 */

}

/**

  * @brief System Clock Configuration

  * @retval None

  */

void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Initializes the RCC Oscillators according to the specified parameters

  * in the RCC_OscInitTypeDef structure.

  */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;

  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {

    Error_Handler();

  }

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

  */

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                              |RCC_CLOCKTYPE_PCLK1;

  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;

  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)

  {

    Error_Handler();

  }

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;

  PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;

  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

  {

    Error_Handler();

  }

}

/**

  * @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.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

  if (HAL_UART_Init(&huart2) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

/**

  * Enable DMA controller clock

  */

static void MX_DMA_Init(void)

{

  /* DMA controller clock enable */

  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */

  /* DMA1_Channel4_5_6_7_IRQn interrupt configuration */

  HAL_NVIC_SetPriority(DMA1_Channel4_5_6_7_IRQn, 0, 0);

  HAL_NVIC_EnableIRQ(DMA1_Channel4_5_6_7_IRQn);

}

/**

  * @brief GPIO Initialization Function

  * @param None

  * @retval None

  */

static void MX_GPIO_Init(void)

{

  GPIO_InitTypeDef GPIO_InitStruct = {0};

/* USER CODE BEGIN MX_GPIO_Init_1 */

/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */

  __HAL_RCC_GPIOC_CLK_ENABLE();

  __HAL_RCC_GPIOF_CLK_ENABLE();

  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */

  HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin : B1_Pin */

  GPIO_InitStruct.Pin = B1_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : LD2_Pin */

  GPIO_InitStruct.Pin = LD2_Pin;

  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

  GPIO_InitStruct.Pull = GPIO_NOPULL;

  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

  HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */

/* USER CODE END MX_GPIO_Init_2 */

}

/* USER CODE BEGIN 4 */

/* 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 */

  __disable_irq();

  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) */

  /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */