CRC.cpp

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/*
 * CRC.cpp
 *
 *  Created on: Jan 10, 2023
 *      Author: Yannick
 */
 
#include "CRC.h"
 
uint8_t calculateCrc8(std::array<uint8_t,256> &crctable,uint8_t* buf,uint16_t len,uint8_t crc){
    for(uint16_t i = 0;i<len;i++){
        crc = crctable[buf[i] ^ crc];
    }
    return crc;
}
 
uint16_t calculateCrc16_8(std::array<uint16_t,256> &crctable,uint8_t* buf,uint16_t len,uint16_t crc){
    for(uint16_t i = 0;i<len;i++){
        crc = crctable[(((crc >> 8) ^ buf[i]) & 0xFF)] ^ (crc << 8);
    }
    return crc;
}
 
uint16_t calculateCrc16_8_rev(std::array<uint16_t,256> &crctable,uint8_t* buf,uint16_t len,uint16_t crc){
    for(uint16_t i = 0;i<len;i++){
        crc = __REVSH(crctable[(((crc >> 8) ^ buf[i]) & 0xFF)]) ^ (crc << 8);
    }
    return crc;
}