2019-03-22 01:52:22 -06:00
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// Copyright Mark Qvist / unsigned.io
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// https://unsigned.io/microaprs
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//
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// Licensed under GPL-3.0. For full info,
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// read the LICENSE file.
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2014-12-02 17:10:06 -07:00
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// CRC-CCIT Implementation based on work by Francesco Sacchi
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#ifndef CRC_CCIT_H
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#define CRC_CCIT_H
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#include <stdint.h>
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#include <avr/pgmspace.h>
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#define CRC_CCIT_INIT_VAL ((uint16_t)0xFFFF)
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extern const uint16_t crc_ccit_table[256];
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inline uint16_t update_crc_ccit(uint8_t c, uint16_t prev_crc) {
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return (prev_crc >> 8) ^ pgm_read_word(&crc_ccit_table[(prev_crc ^ c) & 0xff]);
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}
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#endif
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