25 lines
462 B
C
25 lines
462 B
C
/*
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* crc.c
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*
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* Created on: 19 Dec 2025
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* Author: janik
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*/
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#include "crc.h"
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void CRC8_107_add(CRC8_107 *ctx, uint8_t data)
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{
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ctx->crc ^= ((uint32_t)data << 8);
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for (size_t bit_n = 0; bit_n < 8; bit_n++) {
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if (ctx->crc & 0x8000u) {
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ctx->crc ^= ((uint32_t)0x1070u << 3); // same as 0x8380
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}
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ctx->crc <<= 1;
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}
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}
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uint8_t CRC8_107_getChecksum(const CRC8_107 *ctx)
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{
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return (uint8_t)(ctx->crc >> 8);
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}
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