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29 lines
831 B
C
29 lines
831 B
C
4 years ago
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#include <stdint.h>
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#include <stdlib.h>
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#define POCSAG_SYNC 0x7CD215D8
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#define POCSAG_IDLE 0x7A89C197
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#define POCSAG_FRAME_SIZE 2
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#define POCSAG_BATCH_SIZE 16
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#define POCSAG_PREAMBLE_LENGTH 576
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#define POCSAG_FLAG_ADDRESS 0x000000
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#define POCSAG_FLAG_MESSAGE 0x100000
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#define POCSAG_FLAG_TEXT_DATA 0x3
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#define POCSAG_FLAG_NUMERIC_DATA = 0x0
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#define TEXT_BITS_PER_WORD 20
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#define TEXT_BITS_PER_CHAR 7
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#define CRC_BITS 10
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#define CRC_GENERATOR 0b11101101001
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uint32_t crc(uint32_t inputMsg);
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uint32_t parity(uint32_t x);
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uint32_t encodeCodeword(uint32_t msg);
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uint32_t encodeASCII(uint32_t initial_offset, char *str, uint32_t *out);
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int addressOffset(int address);
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void encodeTransmission(int repeatIndex, int address, int fb, char *message, uint32_t *out);
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size_t textMessageLength(int repeatIndex, int address, int numChars);
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