STM32L4R5板子CRC程序的问题

X^4 + X^3 + X^2 + 1 */#define CRC_POLYNOMIAL_16B 0x1021 /* X^16 + X^12 + X^5 + 1 */#define CRC_POLYNOMIAL_32B 0x04C11DB7 /* X^32 + X^26 + X^23 + X^22 + X^16 + X^12 + X^11 + X^10 + X^8 + X^7 + X^5 + X^4 + X^2 + X^1 + 1 *//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*/CRC_HandleTypeDef hcrc;uint32_t aDataBuffer[BUFFER_SIZE]={0x12345678};/* Private function prototypes -----------------------------------------------*/void SystemClock_Config(void);static void MX_CRC_Init(void);/* Private functions ---------------------------------------------------------*//**  * @brief  Main program  * @param  None  * @retval None  */int main(void) {  /* 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_CRC_Init();  /*##-1- Compute the CRC for 8-bit Data Streams### * ####################################################### * The crc is initially initialized to 0xFFFFFFFF, correspondingly, the final XOR is performed with 0xFFFFFFFF. */  printf("The CRC code using the user-defined polynomial, the aDataBuffer is 0x%Xn", (unsigned int)aDataBuffer[0]);  hcrc.Instance = CRC;  hcrc.Init.DefaultPolynomialUse = DEFAULT_CRC32_POLY;  hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE;  hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;  hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_NONE;  hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_WORDS;  if (HAL_CRC_Init(&hcrc) != HAL_OK)  {    Error_Handler();  }    /* Compute the CRC value */  uint32_t uwCRCValue = HAL_CRC_Calculate(&hcrc, aDataBuffer, BUFFER_SIZE);  printf("CRC-32C (8-bit Data Streams): 0x%Xn", (unsigned int)uwCRCValue);  /*##-2- Compute the CRC for 16-bit Data Streams### * ######################################################## * The crc is initially initialized to 0xFFFF, correspondingly, the final XOR is performed with 0xFFFF. */  hcrc.Init.DefaultPolynomialUse = DEFAULT_CRC16_POLY;  hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE;  hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_HALFWORDS;  if (HAL_CRC_Init(&hcrc) != HAL_OK)  {    Error_Handler();  }  /* Compute the CRC value */  uwCRCValue = HAL_CRC_Calculate(&hcrc, aDataBuffer, BUFFER_SIZE);  printf("CRC-CCITT (16-bit Data Streams): 0x%Xn", (unsigned int)uwCRCValue);  /*##-3- Compute the CRC for 32-bit Data Streams### * ######################################################## * The crc is initially initialized to 0xFFFFFFFF, correspondingly, the final XOR is performed with 0xFFFFFFFF. */  hcrc.Init.DefaultPolynomialUse = DEFAULT_CRC32_POLY;  hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE;  hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_WORDS;  if (HAL_CRC_Init(&hcrc) != HAL_OK)  {    Error_Handler();  }  /* Compute the CRC value */  uwCRCValue = HAL_CRC_Calculate(&hcrc, aDataBuffer, BUFFER_SIZE);  printf("CRC-32 (32-bit Data Streams): 0x%Xn", (unsigned int)uwCRCValue);  /* Infinite loop */  while (1)  {  }  /* USER CODE END 3 */}/**  * @brief System Clock Configuration  * @retval None  */void SystemClock_Config(void) {  RCC_OscInitTypeDef RCC_OscInitStruct = {0};  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};  /** Initializes the RCC Oscillators according to the specified parameters  * in the RCC_OscInitTypeDef structure.  */  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;  RCC_OscInitStruct.HSIState = RCC_HSI_ON;  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;  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_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();  }}/**  * @brief CRC Initialization Function  * @param None  * @retval None  */static void MX_CRC_Init(void) {  hcrc.Instance = CRC;  hcrc.Init.DefaultPolynomialUse = DEFAULT_CRC32_POLY;  hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE;  hcrc.Init.InputDataInversionMode = CRC_INPUTDATA_INVERSION_NONE;  hcrc.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;  hcrc.InputDataFormat = CRC_INPUTDATA_FORMAT_WORDS;  if (HAL_CRC_Init(&hcrc) != HAL_OK)  {    Error_Handler();  }}/**  * @brief  This function is executed in case of error occurrence.  * @param  None  * @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 */}/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) {  /* Prevent unused argument(s) compilation warning */  UNUSED(GPIO_Pin);  /* NOTE: This function Should not be modified, when the callback is needed,  *        the HAL_GPIO_EXTI_Callback could be implemented in the user file  */}/**  * @}  *//**  * @}  *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

问题代码：

1、程序没有定义 main 函数，导致编译错误。

2、程序中定义的变量和宏没有使用和说明，不便于代码阅读。

3、程序中使用了 printf 函数，但没有包含相应的头文件，导致编译错误。

4、程序中调用了未定义的函数 Error_Handler()，需要提供相应的函数实现。

有main函数啊，你没看见吗