crc16

CRC Utils

This utility can be used to calculate a crc-checksum across given data.

File Structure

utils/
└── crc/
    ├── crc16.c
    └── crc16.h

The library is completely patform independent and can be usesd across a wide range of c-compilers.

Downloads

The library can be downloaded (zip or tar), cloned or used as submodule in a project.

Type	File	Description
Library	zip / tar	CRC library that implements checksum calculation

Using with git clone

mkdir -p ./utils/
git clone https://github.com/0x007E/utils-crc.git ./utils
mv ./utils/utils-crc ./utils/crc

Using as git submodule

git submodule add https://github.com/0x007E/utils-crc.git ./utils/crc

Programming

#include "../lib/utils/crc/crc16.h"
 
int main(void)
{
    crc16_init(CRC16_INITIAL_VALUE);
 
    unsigned char data[] = { 0x01, 0xAF, 0xED, 0x30, 0x41 };
    unsigned int crc;
 
    // Bytewise
    for (unsigned char i=0; i < (sizeof(data)/sizeof(data[0])); i++)
    {
        crc16_update(data[i]);
    }
 
    crc = crc16_result();
 
    // Arraywise
    crc = crc16_calculate(CRC16_INITIAL_VALUE, data, (sizeof(data)/sizeof(data[0]));
 
 
    // CRC-checksum as array
    unsigned char checksum[2];
    crc16_result_array(checksum);
}

Additional Information

Type	Link	Description
AppNote	pdf	Application note for CRC16

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R. GAECHTER