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https://github.com/DarkFlippers/unleashed-firmware
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19 lines
553 B
C
19 lines
553 B
C
#include "maxim_crc.h"
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#include <furi.h>
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uint8_t maxim_crc8(const uint8_t* data, const uint8_t data_size, const uint8_t crc_init) {
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furi_check(data);
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uint8_t crc = crc_init;
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for(uint8_t index = 0; index < data_size; ++index) {
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uint8_t input_byte = data[index];
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for(uint8_t bit_position = 0; bit_position < 8; ++bit_position) {
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const uint8_t mix = (crc ^ input_byte) & (uint8_t)(0x01);
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crc >>= 1;
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if(mix != 0) crc ^= 0x8C;
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input_byte >>= 1;
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}
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}
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return crc;
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}
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