Node / markqvist / OpenModem.git / files / util / CRC-CCIT.h

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// CRC-CCIT Implementation based on work by Francesco Sacchi

#ifndef CRC_CCIT_H

#define CRC_CCIT_H

#include <stdint.h>

#include <avr/pgmspace.h>

#define CRC_CCIT_INIT_VAL ((uint16_t)0xFFFF)

extern const uint16_t crc_ccit_table[256];

inline uint16_t update_crc_ccit(uint8_t c, uint16_t prev_crc) {

return (prev_crc >> 8) ^ pgm_read_word(&crc_ccit_table[(prev_crc ^ c) & 0xff]);

}

#endif