crc32.c 4.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111
  1. /**
  2. * \file crc32.c
  3. * Functions and types for CRC checks.
  4. *
  5. * Generated on Sat Sep 25 18:06:34 2010,
  6. * by pycrc v0.7.1, http://www.tty1.net/pycrc/
  7. * using the configuration:
  8. * Width = 32
  9. * Poly = 0x04c11db7
  10. * XorIn = 0xffffffff
  11. * ReflectIn = True
  12. * XorOut = 0xffffffff
  13. * ReflectOut = True
  14. * Algorithm = table-driven
  15. * Direct = True
  16. *****************************************************************************/
  17. #include "crc32.h"
  18. #include "config.h"
  19. #include <arm/NXP/LPC17xx/LPC17xx.h>
  20. #include <stdlib.h>
  21. /**
  22. * Static table used for the table_driven implementation.
  23. *****************************************************************************/
  24. static const uint32_t crc32_table[256] =
  25. {
  26. 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
  27. 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
  28. 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  29. 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
  30. 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  31. 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  32. 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
  33. 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
  34. 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  35. 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  36. 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
  37. 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  38. 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
  39. 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
  40. 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  41. 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
  42. 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
  43. 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  44. 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
  45. 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  46. 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  47. 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
  48. 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
  49. 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  50. 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  51. 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
  52. 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  53. 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
  54. 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
  55. 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  56. 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
  57. 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
  58. 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  59. 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
  60. 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  61. 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  62. 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
  63. 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
  64. 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  65. 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  66. 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
  67. 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  68. 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
  69. 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
  70. 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  71. 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
  72. 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
  73. 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  74. 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
  75. 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  76. 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  77. 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
  78. 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
  79. 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  80. 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  81. 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
  82. 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  83. 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
  84. 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
  85. 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  86. 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
  87. 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
  88. 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  89. 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  90. };
  91. /**
  92. * Update the crc value with new data.
  93. *
  94. * \param crc The current crc value.
  95. * \param data Pointer to a buffer of \a data_len bytes.
  96. * \param data_len Number of bytes in the \a data buffer.
  97. * \return The updated crc value.
  98. *****************************************************************************/
  99. uint32_t crc32_update( uint32_t crc, const unsigned char data )
  100. {
  101. unsigned int tbl_idx;
  102. tbl_idx = ( crc ^ data ) & 0xff;
  103. crc = ( crc32_table[tbl_idx] ^ ( crc >> 8 ) ) & 0xffffffff;
  104. return crc & 0xffffffff;
  105. }