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Mark Qvist 2014-12-03 01:10:06 +01:00
commit 05d62b594e
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util/CRC-CCIT.h Normal file
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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