硬件CRC校验的问题

#include "main.h"



/** @addtogroup STM32F3xx_HAL_Examples

  * @{

  */



/** @addtogroup CRC_Example

  * @{

  */



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

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

#define BUFFER_SIZE    114



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

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

/* CRC handler declaration */

CRC_HandleTypeDef   CrcHandle;



/* Used for storing CRC Value */

__IO uint32_t uwCRCValue = 0;



static const uint32_t aDataBuffer[BUFFER_SIZE] =

{

  0x00001021, 0x20423063, 0x408450a5, 0x60c670e7, 0x9129a14a, 0xb16bc18c,

  0xd1ade1ce, 0xf1ef1231, 0x32732252, 0x52b54294, 0x72f762d6, 0x93398318,

  0xa35ad3bd, 0xc39cf3ff, 0xe3de2462, 0x34430420, 0x64e674c7, 0x44a45485,

  0xa56ab54b, 0x85289509, 0xf5cfc5ac, 0xd58d3653, 0x26721611, 0x063076d7,

  0x569546b4, 0xb75ba77a, 0x97198738, 0xf7dfe7fe, 0xc7bc48c4, 0x58e56886,

  0x78a70840, 0x18612802, 0xc9ccd9ed, 0xe98ef9af, 0x89489969, 0xa90ab92b,

  0x4ad47ab7, 0x6a961a71, 0x0a503a33, 0x2a12dbfd, 0xfbbfeb9e, 0x9b798b58,

  0xbb3bab1a, 0x6ca67c87, 0x5cc52c22, 0x3c030c60, 0x1c41edae, 0xfd8fcdec,

  0xad2abd0b, 0x8d689d49, 0x7e976eb6, 0x5ed54ef4, 0x2e321e51, 0x0e70ff9f,

  0xefbedfdd, 0xcffcbf1b, 0x9f598f78, 0x918881a9, 0xb1caa1eb, 0xd10cc12d,

  0xe16f1080, 0x00a130c2, 0x20e35004, 0x40257046, 0x83b99398, 0xa3fbb3da,

  0xc33dd31c, 0xe37ff35e, 0x129022f3, 0x32d24235, 0x52146277, 0x7256b5ea,

  0x95a88589, 0xf56ee54f, 0xd52cc50d, 0x34e224c3, 0x04817466, 0x64475424,

  0x4405a7db, 0xb7fa8799, 0xe75ff77e, 0xc71dd73c, 0x26d336f2, 0x069116b0,

  0x76764615, 0x5634d94c, 0xc96df90e, 0xe92f99c8, 0xb98aa9ab, 0x58444865,

  0x78066827, 0x18c008e1, 0x28a3cb7d, 0xdb5ceb3f, 0xfb1e8bf9, 0x9bd8abbb,

  0x4a755a54, 0x6a377a16, 0x0af11ad0, 0x2ab33a92, 0xed0fdd6c, 0xcd4dbdaa,

  0xad8b9de8, 0x8dc97c26, 0x5c644c45, 0x3ca22c83, 0x1ce00cc1, 0xef1fff3e,

  0xdf7caf9b, 0xbfba8fd9, 0x9ff86e17, 0x7e364e55, 0x2e933eb2, 0x0ed11ef0

};



/* Expected CRC Value */

uint32_t uwExpectedCRCValue = 0x379E9F06;



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

void SystemClock_Config(void);

static void Error_Handler(void);



/* Private functions ---------------------------------------------------------*/



/**

  * [url=home.php?mod=space&uid=247401]@brief[/url]  Main program

  * @param  None

  * @retval None

  */

int main(void)

{

  /* STM32F3xx HAL library initialization:

       - Configure the Flash prefetch

       - Configure the Systick to generate an interrupt each 1 msec

       - Set NVIC Group Priority to 4

       - Low Level Initialization

     */

  HAL_Init();



  /* Configure the system clock to 64 MHz */

  SystemClock_Config();



  /* Configure LED1 and LED3 */

  BSP_LED_Init(LED1);

  BSP_LED_Init(LED3);



  /*##-1- Configure the CRC peripheral #######################################*/

  CrcHandle.Instance = CRC;



  /* The default polynomial is used */

  CrcHandle.Init.DefaultPolynomialUse    = DEFAULT_POLYNOMIAL_ENABLE;



  /* The default init value is used */

  CrcHandle.Init.DefaultInitValueUse     = DEFAULT_INIT_VALUE_ENABLE;



  /* The input data are not inverted */

  CrcHandle.Init.InputDataInversionMode  = CRC_INPUTDATA_INVERSION_NONE;



  /* The output data are not inverted */

  CrcHandle.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;



  /* The input data are 32-bit long words */

  CrcHandle.InputDataFormat              = CRC_INPUTDATA_FORMAT_WORDS;



  if (HAL_CRC_Init(&CrcHandle) != HAL_OK)

  {

    /* Initialization Error */

    Error_Handler();

  }



  /*##-2- Compute the CRC of "aDataBuffer" ###################################*/

  //uwCRCValue = HAL_CRC_Calculate(&CrcHandle, (uint32_t *)aDataBuffer, BUFFER_SIZE);

        uwCRCValue = HAL_CRC_Calculate(&CrcHandle, (uint32_t *)aDataBuffer, 2);



  /*##-3- Compare the CRC value to the Expected one ##########################*/

  if (uwCRCValue != uwExpectedCRCValue)

  {

    /* Wrong CRC value: Turn LED3 on */

    Error_Handler();

  }

  else

  {

    /* Right CRC value: Turn LED1 on */

    BSP_LED_On(LED1);

  }



  /* Infinite loop */

  while (1)

  {