This project is a collection of former (and some new) projects connected together to make an APRS digipeater, which doubles as an APRS weather station, with PE1RXF telemetry server capabilities.
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10 months ago
// 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