[STM32F3] 硬件CRC校验的问题

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 楼主| 比神乐 发表于 2023-5-23 15:51 | 显示全部楼层 |阅读模式
我有一块STM32F303的板子,里面有CRC的例程。
代码如下:
  1. #include "main.h"

  2. /** @addtogroup STM32F3xx_HAL_Examples
  3.   * @{
  4.   */

  5. /** @addtogroup CRC_Example
  6.   * @{
  7.   */

  8. /* Private typedef -----------------------------------------------------------*/
  9. /* Private define ------------------------------------------------------------*/
  10. #define BUFFER_SIZE    114

  11. /* Private macro -------------------------------------------------------------*/
  12. /* Private variables ---------------------------------------------------------*/
  13. /* CRC handler declaration */
  14. CRC_HandleTypeDef   CrcHandle;

  15. /* Used for storing CRC Value */
  16. __IO uint32_t uwCRCValue = 0;

  17. static const uint32_t aDataBuffer[BUFFER_SIZE] =
  18. {
  19.   0x00001021, 0x20423063, 0x408450a5, 0x60c670e7, 0x9129a14a, 0xb16bc18c,
  20.   0xd1ade1ce, 0xf1ef1231, 0x32732252, 0x52b54294, 0x72f762d6, 0x93398318,
  21.   0xa35ad3bd, 0xc39cf3ff, 0xe3de2462, 0x34430420, 0x64e674c7, 0x44a45485,
  22.   0xa56ab54b, 0x85289509, 0xf5cfc5ac, 0xd58d3653, 0x26721611, 0x063076d7,
  23.   0x569546b4, 0xb75ba77a, 0x97198738, 0xf7dfe7fe, 0xc7bc48c4, 0x58e56886,
  24.   0x78a70840, 0x18612802, 0xc9ccd9ed, 0xe98ef9af, 0x89489969, 0xa90ab92b,
  25.   0x4ad47ab7, 0x6a961a71, 0x0a503a33, 0x2a12dbfd, 0xfbbfeb9e, 0x9b798b58,
  26.   0xbb3bab1a, 0x6ca67c87, 0x5cc52c22, 0x3c030c60, 0x1c41edae, 0xfd8fcdec,
  27.   0xad2abd0b, 0x8d689d49, 0x7e976eb6, 0x5ed54ef4, 0x2e321e51, 0x0e70ff9f,
  28.   0xefbedfdd, 0xcffcbf1b, 0x9f598f78, 0x918881a9, 0xb1caa1eb, 0xd10cc12d,
  29.   0xe16f1080, 0x00a130c2, 0x20e35004, 0x40257046, 0x83b99398, 0xa3fbb3da,
  30.   0xc33dd31c, 0xe37ff35e, 0x129022f3, 0x32d24235, 0x52146277, 0x7256b5ea,
  31.   0x95a88589, 0xf56ee54f, 0xd52cc50d, 0x34e224c3, 0x04817466, 0x64475424,
  32.   0x4405a7db, 0xb7fa8799, 0xe75ff77e, 0xc71dd73c, 0x26d336f2, 0x069116b0,
  33.   0x76764615, 0x5634d94c, 0xc96df90e, 0xe92f99c8, 0xb98aa9ab, 0x58444865,
  34.   0x78066827, 0x18c008e1, 0x28a3cb7d, 0xdb5ceb3f, 0xfb1e8bf9, 0x9bd8abbb,
  35.   0x4a755a54, 0x6a377a16, 0x0af11ad0, 0x2ab33a92, 0xed0fdd6c, 0xcd4dbdaa,
  36.   0xad8b9de8, 0x8dc97c26, 0x5c644c45, 0x3ca22c83, 0x1ce00cc1, 0xef1fff3e,
  37.   0xdf7caf9b, 0xbfba8fd9, 0x9ff86e17, 0x7e364e55, 0x2e933eb2, 0x0ed11ef0
  38. };

  39. /* Expected CRC Value */
  40. uint32_t uwExpectedCRCValue = 0x379E9F06;

  41. /* Private function prototypes -----------------------------------------------*/
  42. void SystemClock_Config(void);
  43. static void Error_Handler(void);

  44. /* Private functions ---------------------------------------------------------*/

  45. /**
  46.   * [url=home.php?mod=space&uid=247401]@brief[/url]  Main program
  47.   * @param  None
  48.   * @retval None
  49.   */
  50. int main(void)
  51. {
  52.   /* STM32F3xx HAL library initialization:
  53.        - Configure the Flash prefetch
  54.        - Configure the Systick to generate an interrupt each 1 msec
  55.        - Set NVIC Group Priority to 4
  56.        - Low Level Initialization
  57.      */
  58.   HAL_Init();

  59.   /* Configure the system clock to 64 MHz */
  60.   SystemClock_Config();

  61.   /* Configure LED1 and LED3 */
  62.   BSP_LED_Init(LED1);
  63.   BSP_LED_Init(LED3);

  64.   /*##-1- Configure the CRC peripheral #######################################*/
  65.   CrcHandle.Instance = CRC;

  66.   /* The default polynomial is used */
  67.   CrcHandle.Init.DefaultPolynomialUse    = DEFAULT_POLYNOMIAL_ENABLE;

  68.   /* The default init value is used */
  69.   CrcHandle.Init.DefaultInitValueUse     = DEFAULT_INIT_VALUE_ENABLE;

  70.   /* The input data are not inverted */
  71.   CrcHandle.Init.InputDataInversionMode  = CRC_INPUTDATA_INVERSION_NONE;

  72.   /* The output data are not inverted */
  73.   CrcHandle.Init.OutputDataInversionMode = CRC_OUTPUTDATA_INVERSION_DISABLE;

  74.   /* The input data are 32-bit long words */
  75.   CrcHandle.InputDataFormat              = CRC_INPUTDATA_FORMAT_WORDS;

  76.   if (HAL_CRC_Init(&CrcHandle) != HAL_OK)
  77.   {
  78.     /* Initialization Error */
  79.     Error_Handler();
  80.   }

  81.   /*##-2- Compute the CRC of "aDataBuffer" ###################################*/
  82.   //uwCRCValue = HAL_CRC_Calculate(&CrcHandle, (uint32_t *)aDataBuffer, BUFFER_SIZE);
  83.         uwCRCValue = HAL_CRC_Calculate(&CrcHandle, (uint32_t *)aDataBuffer, 2);

  84.   /*##-3- Compare the CRC value to the Expected one ##########################*/
  85.   if (uwCRCValue != uwExpectedCRCValue)
  86.   {
  87.     /* Wrong CRC value: Turn LED3 on */
  88.     Error_Handler();
  89.   }
  90.   else
  91.   {
  92.     /* Right CRC value: Turn LED1 on */
  93.     BSP_LED_On(LED1);
  94.   }

  95.   /* Infinite loop */
  96.   while (1)
  97.   {



程序里有114个数据,比如我只用一个数据
得出结果0x4bb7ed3f
3.jpg
我找到一个软件,算出的结果和程序里一样。
4.jpg
可是我不知道手算怎么得出同样的结果。
哪位大神知道,望告知,谢谢!
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