HECO2/Simulator/ERVSimulator/Program/Protocol/ChecksumHelper.cs

namespace ERVSimulator.Protocol
{
    public static class ChecksumHelper
    {
        public static byte Xor(byte[] data, int start, int length)
        {
            byte x = 0;
            for (int i = 0; i < length; i++) x ^= data[start + i];
            return x;
        }

        public static byte Add(byte[] data, int start, int length)
        {
            int s = 0;
            for (int i = 0; i < length; i++) s += data[start + i];
            return (byte)(s & 0xFF);
        }
    }
}