Module: GPS_PVT::Util::CRC24Q

Defined in:
lib/gps_pvt/util.rb

Constant Summary collapse

POLY = 
0x1864CFB
TABLE = 
0x100.times.collect{|i|
  res = i << 16
  8.times{
    res <<= 1
    res ^= POLY if (res & 0x1000000) > 0
  }
  res
}

Class Method Summary collapse

Class Method Details

.checksum(bytes) ⇒ Object 



120
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# File 'lib/gps_pvt/util.rb', line 120

def CRC24Q.checksum(bytes)
  bytes.inject(0){|crc, byte|
    ((crc << 8) & 0xFFFF00) ^ TABLE[byte ^ ((crc >> 16) & 0xFF)]
  }
end