crc.h

extern uint32_t testFix(uint8_t *message, const uint32_t ecrc);
extern uint32_t testFix11(uint8_t *message, const uint32_t ecrc);
extern void fixChecksum(unsigned char *message, const unsigned int nb);

static const uint32_t crc_table[256] = {
        0x000000, 0xfff409, 0x001c1b, 0xffe812, 0x003836, 0xffcc3f, 0x00242d, 0xffd024,
        0x00706c, 0xff8465, 0x006c77, 0xff987e, 0x00485a, 0xffbc53, 0x005441, 0xffa048,
        0x00e0d8, 0xff14d1, 0x00fcc3, 0xff08ca, 0x00d8ee, 0xff2ce7, 0x00c4f5, 0xff30fc,
        0x0090b4, 0xff64bd, 0x008caf, 0xff78a6, 0x00a882, 0xff5c8b, 0x00b499, 0xff4090,
        0x01c1b0, 0xfe35b9, 0x01ddab, 0xfe29a2, 0x01f986, 0xfe0d8f, 0x01e59d, 0xfe1194,
        0x01b1dc, 0xfe45d5, 0x01adc7, 0xfe59ce, 0x0189ea, 0xfe7de3, 0x0195f1, 0xfe61f8,
        0x012168, 0xfed561, 0x013d73, 0xfec97a, 0x01195e, 0xfeed57, 0x010545, 0xfef14c,
        0x015104, 0xfea50d, 0x014d1f, 0xfeb916, 0x016932, 0xfe9d3b, 0x017529, 0xfe8120,
        0x038360, 0xfc7769, 0x039f7b, 0xfc6b72, 0x03bb56, 0xfc4f5f, 0x03a74d, 0xfc5344,
        0x03f30c, 0xfc0705, 0x03ef17, 0xfc1b1e, 0x03cb3a, 0xfc3f33, 0x03d721, 0xfc2328,
        0x0363b8, 0xfc97b1, 0x037fa3, 0xfc8baa, 0x035b8e, 0xfcaf87, 0x034795, 0xfcb39c,
        0x0313d4, 0xfce7dd, 0x030fcf, 0xfcfbc6, 0x032be2, 0xfcdfeb, 0x0337f9, 0xfcc3f0,
        0x0242d0, 0xfdb6d9, 0x025ecb, 0xfdaac2, 0x027ae6, 0xfd8eef, 0x0266fd, 0xfd92f4,
        0x0232bc, 0xfdc6b5, 0x022ea7, 0xfddaae, 0x020a8a, 0xfdfe83, 0x021691, 0xfde298,
        0x02a208, 0xfd5601, 0x02be13, 0xfd4a1a, 0x029a3e, 0xfd6e37, 0x028625, 0xfd722c,
        0x02d264, 0xfd266d, 0x02ce7f, 0xfd3a76, 0x02ea52, 0xfd1e5b, 0x02f649, 0xfd0240,
        0x0706c0, 0xf8f2c9, 0x071adb, 0xf8eed2, 0x073ef6, 0xf8caff, 0x0722ed, 0xf8d6e4,
        0x0776ac, 0xf882a5, 0x076ab7, 0xf89ebe, 0x074e9a, 0xf8ba93, 0x075281, 0xf8a688,
        0x07e618, 0xf81211, 0x07fa03, 0xf80e0a, 0x07de2e, 0xf82a27, 0x07c235, 0xf8363c,
        0x079674, 0xf8627d, 0x078a6f, 0xf87e66, 0x07ae42, 0xf85a4b, 0x07b259, 0xf84650,
        0x06c770, 0xf93379, 0x06db6b, 0xf92f62, 0x06ff46, 0xf90b4f, 0x06e35d, 0xf91754,
        0x06b71c, 0xf94315, 0x06ab07, 0xf95f0e, 0x068f2a, 0xf97b23, 0x069331, 0xf96738,
        0x0627a8, 0xf9d3a1, 0x063bb3, 0xf9cfba, 0x061f9e, 0xf9eb97, 0x060385, 0xf9f78c,
        0x0657c4, 0xf9a3cd, 0x064bdf, 0xf9bfd6, 0x066ff2, 0xf99bfb, 0x0673e9, 0xf987e0,
        0x0485a0, 0xfb71a9, 0x0499bb, 0xfb6db2, 0x04bd96, 0xfb499f, 0x04a18d, 0xfb5584,
        0x04f5cc, 0xfb01c5, 0x04e9d7, 0xfb1dde, 0x04cdfa, 0xfb39f3, 0x04d1e1, 0xfb25e8,
        0x046578, 0xfb9171, 0x047963, 0xfb8d6a, 0x045d4e, 0xfba947, 0x044155, 0xfbb55c,
        0x041514, 0xfbe11d, 0x04090f, 0xfbfd06, 0x042d22, 0xfbd92b, 0x043139, 0xfbc530,
        0x054410, 0xfab019, 0x05580b, 0xfaac02, 0x057c26, 0xfa882f, 0x05603d, 0xfa9434,
        0x05347c, 0xfac075, 0x052867, 0xfadc6e, 0x050c4a, 0xfaf843, 0x051051, 0xfae458,
        0x05a4c8, 0xfa50c1, 0x05b8d3, 0xfa4cda, 0x059cfe, 0xfa68f7, 0x0580e5, 0xfa74ec,
        0x05d4a4, 0xfa20ad, 0x05c8bf, 0xfa3cb6, 0x05ec92, 0xfa189b, 0x05f089, 0xfa0480
};

static inline uint32_t CrcStep(uint8_t in, uint32_t crc) {
       	return ((crc << 8) ^ crc_table[in ^ (uint8_t)(crc >> 16)]) ;
}

static inline uint32_t CrcEnd(uint8_t *frame,int32_t crc,int n) {
	return (((crc) & 0xffffff) ^ (((uint32_t)frame[(n)-3]<<16)|((uint32_t)frame[(n)-2]<<8)|(uint32_t)frame[(n)-1])) ;
}