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CRC16.c

CRC16.c 5.0 KB
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  1. //【CRC16校验源代码】
    2. 

  2. /*  名称       		生成多项式             				简记式*  			标准引用
    3. 

  3.    CRC-4       		x4+x+1                  			3         			ITU G.704
    4. 

  4.    CRC-8       		x8+x5+x4+1             				0x31
    5. 

  5.    CRC-8       		x8+x2+x1+1             				0x07
    6. 

  6.    CRC-8       		x8+x6+x4+x3+x2+x1       			0x5E
    7. 

  7.    CRC-12      		x12+x11+x3+x+1          			80F
    8. 

  8.    CRC-16      		x16+x15+x2+1            			8005      			IBM SDLC
    9. 

  9.    CRC16-CCITT 		x16+x12+x5+1            			1021      			ISO HDLC, ITU X.25, V.34/V.41/V.42, PPP-FCS
    10. 

  10.    CRC-32      		x32+x26+x23+...+x2+x+1 				04C11DB7 			ZIP, RAR, IEEE 802 LAN/FDDI, IEEE 1394, PPP-FCS
    11. 

  11.    CRC-32c     		x32+x28+x27+...+x8+x6+1 			1EDC6F41 			SCTP
    12. 

  12. */
    13. 

  13. 

  14. #include "crc16.h"
    15. 

  15. #include "stdio.h"
    16. 

  16. 

  17. //=====================================================CRC-16====================校验方式======================================================
    18. 

  18. 

  19. // CRC_LIB库  https://github.com/lammertb/libcrc/tree/v2.0
    20. 

  20. 

  21. /* USER CODE BEGIN 0 */
    22. 

  22. // CRC高位字节值表
    23. 

  23. const uint8_t auchCRCHi[] = {
    24. 

  24.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    25. 

  25.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    26. 

  26.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    27. 

  27.     0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    28. 

  28.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    29. 

  29.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    30. 

  30.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    31. 

  31.     0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    32. 

  32.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    33. 

  33.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    34. 

  34.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    35. 

  35.     0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    36. 

  36.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    37. 

  37.     0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    38. 

  38.     0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    39. 

  39.     0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    40. 

  40.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    41. 

  41.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
    42. 

  42.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    43. 

  43.     0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
    44. 

  44.     0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
    45. 

  45.     0x00, 0xC1, 0x81, 0x40};
    46. 

  46. // CRC 低位字节值表
    47. 

  47. const uint8_t auchCRCLo[] = {
    48. 

  48.     0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7,
    49. 

  49.     0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E,
    50. 

  50.     0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9,
    51. 

  51.     0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC,
    52. 

  52.     0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
    53. 

  53.     0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32,
    54. 

  54.     0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D,
    55. 

  55.     0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38,
    56. 

  56.     0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF,
    57. 

  57.     0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
    58. 

  58.     0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1,
    59. 

  59.     0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4,
    60. 

  60.     0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB,
    61. 

  61.     0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA,
    62. 

  62.     0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
    63. 

  63.     0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0,
    64. 

  64.     0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97,
    65. 

  65.     0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E,
    66. 

  66.     0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89,
    67. 

  67.     0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
    68. 

  68.     0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83,
    69. 

  69.     0x41, 0x81, 0x80, 0x40};
    70. 

  70. //获取CRC16校验值(CRC-16 Modbus协议)
    71. 

  71. // puchMsg:要校验的数组
    72. 

  72. // usDataLen:校验的长度
    73. 

  73. //返回值:CRC16码
    74. 

  74. uint16_t Get_Crc16(uint8_t *puchMsg, uint16_t usDataLen)
    75. 

  75. {
    76. 

  76.     uint8_t uchCRCHi = 0xFF; //高CRC 字节初始化
    77. 

  77.     uint8_t uchCRCLo = 0xFF; //低CRC 字节初始化
    78. 

  78.     uint32_t uIndex;         // CRC 循环中的索引
    79. 

  79.     while (usDataLen--)      //传输消息缓冲区
    80. 

  80.     {
    81. 

  81.         //        uIndex=uchCRCHi^*puchMsg++; //计算CRC
    82. 

  82.         //        uchCRCHi=uchCRCLo^auchCRCHi[uIndex];
    83. 

  83.         //        uchCRCLo=auchCRCLo[uIndex];
    84. 

  84.         uIndex = uchCRCLo ^ *puchMsg++; //计算CRC
    85. 

  85.         uchCRCLo = uchCRCHi ^ auchCRCHi[uIndex];
    86. 

  86.         uchCRCHi = auchCRCLo[uIndex];
    87. 

  87.     }
    88. 

  88.     return (uchCRCHi << 8 | uchCRCLo);
    89. 

  89. }
    90.