kopia lustrzana https://github.com/kgoba/ft8_lib
31 wiersze
839 B
C
31 wiersze
839 B
C
#ifndef _INCLUDE_CRC_H_
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#define _INCLUDE_CRC_H_
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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// Compute 14-bit CRC for a sequence of given number of bits using FT8/FT4 CRC polynomial
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// [IN] message - byte sequence (MSB first)
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// [IN] num_bits - number of bits in the sequence
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uint16_t ftx_compute_crc(const uint8_t message[], int num_bits);
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/// Extract the FT8/FT4 CRC of a packed message (during decoding)
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/// @param[in] a91 77 bits of payload data + CRC
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/// @return Extracted CRC
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uint16_t ftx_extract_crc(const uint8_t a91[]);
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/// Add FT8/FT4 CRC to a packed message (during encoding)
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/// @param[in] payload 77 bits of payload data
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/// @param[out] a91 91 bits of payload data + CRC
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void ftx_add_crc(const uint8_t payload[], uint8_t a91[]);
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#ifdef __cplusplus
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}
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#endif
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#endif // _INCLUDE_CRC_H_
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