CFA631-TMF-KU

Java on Windows for changing text commands to CRC16 data packets understandable by CFA631, CFA533/CFA633, CFA635, and CFA735 LCDspublic class CRC16 extends Object
{
    public static void main(String[] args)
    {
        byte[] data = new byte[2];
        // hw - fw
        data[0] = 0x01;
        data[1] = 0x00;
        System.out.println("hw -fw req");
        System.out.println(Integer.toHexString(compute(data)));

        // ping
        data[0] = 0x00;
        data[1] = 0x00;
        System.out.println("ping");
        System.out.println(Integer.toHexString(compute(data)));

        // reboot
        data[0] = 0x05;
        data[1] = 0x00;
        System.out.println("reboot");
        System.out.println(Integer.toHexString(compute(data)));

        // clear lcd
        data[0] = 0x06;
        data[1] = 0x00;
        System.out.println("clear lcd");
        System.out.println(Integer.toHexString(compute(data)));

        // set line 1
        data = new byte[18];
        data[0] = 0x07;
        data[1] = 0x10;
        String text = "Test Test Test  ";
        byte[] textByte = text.getBytes();
        for (int i=0; i < text.length(); i++) data[i+2] = textByte[i];
        System.out.println("text 1");
        System.out.println(Integer.toHexString(compute(data)));
    }
    
    private CRC16()
    {
    }
    
    private static final int[] crcLookupTable =
    {
        0x00000,0x01189,0x02312,0x0329B,0x04624,0x057AD,0x06536,0x074BF,
        0x08C48,0x09DC1,0x0AF5A,0x0BED3,0x0CA6C,0x0DBE5,0x0E97E,0x0F8F7,
        0x01081,0x00108,0x03393,0x0221A,0x056A5,0x0472C,0x075B7,0x0643E,
        0x09CC9,0x08D40,0x0BFDB,0x0AE52,0x0DAED,0x0CB64,0x0F9FF,0x0E876,
        0x02102,0x0308B,0x00210,0x01399,0x06726,0x076AF,0x04434,0x055BD,
        0x0AD4A,0x0BCC3,0x08E58,0x09FD1,0x0EB6E,0x0FAE7,0x0C87C,0x0D9F5,
        0x03183,0x0200A,0x01291,0x00318,0x077A7,0x0662E,0x054B5,0x0453C,
        0x0BDCB,0x0AC42,0x09ED9,0x08F50,0x0FBEF,0x0EA66,0x0D8FD,0x0C974,
        0x04204,0x0538D,0x06116,0x0709F,0x00420,0x015A9,0x02732,0x036BB,
        0x0CE4C,0x0DFC5,0x0ED5E,0x0FCD7,0x08868,0x099E1,0x0AB7A,0x0BAF3,
        0x05285,0x0430C,0x07197,0x0601E,0x014A1,0x00528,0x037B3,0x0263A,
        0x0DECD,0x0CF44,0x0FDDF,0x0EC56,0x098E9,0x08960,0x0BBFB,0x0AA72,
        0x06306,0x0728F,0x04014,0x0519D,0x02522,0x034AB,0x00630,0x017B9,
        0x0EF4E,0x0FEC7,0x0CC5C,0x0DDD5,0x0A96A,0x0B8E3,0x08A78,0x09BF1,
        0x07387,0x0620E,0x05095,0x0411C,0x035A3,0x0242A,0x016B1,0x00738,
        0x0FFCF,0x0EE46,0x0DCDD,0x0CD54,0x0B9EB,0x0A862,0x09AF9,0x08B70,
        0x08408,0x09581,0x0A71A,0x0B693,0x0C22C,0x0D3A5,0x0E13E,0x0F0B7,
        0x00840,0x019C9,0x02B52,0x03ADB,0x04E64,0x05FED,0x06D76,0x07CFF,
        0x09489,0x08500,0x0B79B,0x0A612,0x0D2AD,0x0C324,0x0F1BF,0x0E036,
        0x018C1,0x00948,0x03BD3,0x02A5A,0x05EE5,0x04F6C,0x07DF7,0x06C7E,
        0x0A50A,0x0B483,0x08618,0x09791,0x0E32E,0x0F2A7,0x0C03C,0x0D1B5,
        0x02942,0x038CB,0x00A50,0x01BD9,0x06F66,0x07EEF,0x04C74,0x05DFD,
        0x0B58B,0x0A402,0x09699,0x08710,0x0F3AF,0x0E226,0x0D0BD,0x0C134,
        0x039C3,0x0284A,0x01AD1,0x00B58,0x07FE7,0x06E6E,0x05CF5,0x04D7C,
        0x0C60C,0x0D785,0x0E51E,0x0F497,0x08028,0x091A1,0x0A33A,0x0B2B3,
        0x04A44,0x05BCD,0x06956,0x078DF,0x00C60,0x01DE9,0x02F72,0x03EFB,
        0x0D68D,0x0C704,0x0F59F,0x0E416,0x090A9,0x08120,0x0B3BB,0x0A232,
        0x05AC5,0x04B4C,0x079D7,0x0685E,0x01CE1,0x00D68,0x03FF3,0x02E7A,
        0x0E70E,0x0F687,0x0C41C,0x0D595,0x0A12A,0x0B0A3,0x08238,0x093B1,
        0x06B46,0x07ACF,0x04854,0x059DD,0x02D62,0x03CEB,0x00E70,0x01FF9,
        0x0F78F,0x0E606,0x0D49D,0x0C514,0x0B1AB,0x0A022,0x092B9,0x08330,
        0x07BC7,0x06A4E,0x058D5,0x0495C,0x03DE3,0x02C6A,0x01EF1,0x00F78
    };

    public static int compute(byte[] data)
    {
        int newCrc = 0x0FFFF;
        for (int i = 0; i < data.length; i++)
        {
            int lookup = crcLookupTable[(newCrc ^ data[i]) & 0xFF];
            newCrc = (newCrc >> 8) ^ lookup;
        }
        return(~newCrc);
    }
}
  

This is C# (C sharp) used to control CFA633, CFA635, CFA631 USB LCDs and keypad buttons. It's bare-bones. Does not monitor return packets or SCAB/Keypad reports. 

The first thing to improve would be to open the serial port in a class constructor or open method, then close it in a destructor or a close method so that ports aren't continually opening and closing for each packet, as they are in this example code.
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Text;
namespace ConsoleApplication1
{
    publicclassLCD
    {
        public SerialPort Port = newSerialPort("COM3", 115200, Parity.None, 8, StopBits.One);
        public struct PACKET_STRUCT
        {
            public Byte command, data_length;
            public Byte[] data;
            public uint crc;
            public PACKET_STRUCT(Byte[] byteArray, Byte c, Byte length)
            {
                command = c;
                data_length = length;
                data = byteArray;
                crc = uint.MinValue;
            }
        }

        private static uint[] crcLookupTable =
        {
            0x00000,0x01189,0x02312,0x0329B,0x04624,0x057AD,0x06536,0x074BF,
            0x08C48,0x09DC1,0x0AF5A,0x0BED3,0x0CA6C,0x0DBE5,0x0E97E,0x0F8F7,
            0x01081,0x00108,0x03393,0x0221A,0x056A5,0x0472C,0x075B7,0x0643E,
            0x09CC9,0x08D40,0x0BFDB,0x0AE52,0x0DAED,0x0CB64,0x0F9FF,0x0E876,
            0x02102,0x0308B,0x00210,0x01399,0x06726,0x076AF,0x04434,0x055BD,
            0x0AD4A,0x0BCC3,0x08E58,0x09FD1,0x0EB6E,0x0FAE7,0x0C87C,0x0D9F5,
            0x03183,0x0200A,0x01291,0x00318,0x077A7,0x0662E,0x054B5,0x0453C,
            0x0BDCB,0x0AC42,0x09ED9,0x08F50,0x0FBEF,0x0EA66,0x0D8FD,0x0C974,
            0x04204,0x0538D,0x06116,0x0709F,0x00420,0x015A9,0x02732,0x036BB,
            0x0CE4C,0x0DFC5,0x0ED5E,0x0FCD7,0x08868,0x099E1,0x0AB7A,0x0BAF3,
            0x05285,0x0430C,0x07197,0x0601E,0x014A1,0x00528,0x037B3,0x0263A,
            0x0DECD,0x0CF44,0x0FDDF,0x0EC56,0x098E9,0x08960,0x0BBFB,0x0AA72,
            0x06306,0x0728F,0x04014,0x0519D,0x02522,0x034AB,0x00630,0x017B9,
            0x0EF4E,0x0FEC7,0x0CC5C,0x0DDD5,0x0A96A,0x0B8E3,0x08A78,0x09BF1,
            0x07387,0x0620E,0x05095,0x0411C,0x035A3,0x0242A,0x016B1,0x00738,
            0x0FFCF,0x0EE46,0x0DCDD,0x0CD54,0x0B9EB,0x0A862,0x09AF9,0x08B70,
            0x08408,0x09581,0x0A71A,0x0B693,0x0C22C,0x0D3A5,0x0E13E,0x0F0B7,
            0x00840,0x019C9,0x02B52,0x03ADB,0x04E64,0x05FED,0x06D76,0x07CFF,
            0x09489,0x08500,0x0B79B,0x0A612,0x0D2AD,0x0C324,0x0F1BF,0x0E036,
            0x018C1,0x00948,0x03BD3,0x02A5A,0x05EE5,0x04F6C,0x07DF7,0x06C7E,
            0x0A50A,0x0B483,0x08618,0x09791,0x0E32E,0x0F2A7,0x0C03C,0x0D1B5,
            0x02942,0x038CB,0x00A50,0x01BD9,0x06F66,0x07EEF,0x04C74,0x05DFD,
            0x0B58B,0x0A402,0x09699,0x08710,0x0F3AF,0x0E226,0x0D0BD,0x0C134,
            0x039C3,0x0284A,0x01AD1,0x00B58,0x07FE7,0x06E6E,0x05CF5,0x04D7C,
            0x0C60C,0x0D785,0x0E51E,0x0F497,0x08028,0x091A1,0x0A33A,0x0B2B3,
            0x04A44,0x05BCD,0x06956,0x078DF,0x00C60,0x01DE9,0x02F72,0x03EFB,
            0x0D68D,0x0C704,0x0F59F,0x0E416,0x090A9,0x08120,0x0B3BB,0x0A232,
            0x05AC5,0x04B4C,0x079D7,0x0685E,0x01CE1,0x00D68,0x03FF3,0x02E7A,
            0x0E70E,0x0F687,0x0C41C,0x0D595,0x0A12A,0x0B0A3,0x08238,0x093B1,
            0x06B46,0x07ACF,0x04854,0x059DD,0x02D62,0x03CEB,0x00E70,0x01FF9,
            0x0F78F,0x0E606,0x0D49D,0x0C514,0x0B1AB,0x0A022,0x092B9,0x08330,
            0x07BC7,0x06A4E,0x058D5,0x0495C,0x03DE3,0x02C6A,0x01EF1,0x00F78        
        };
        
        public static uint CalculateCRC(byte[] data, int offset, int length)
        {
            uint newCrc = 0x0FFFF;
            for (int i = offset; i < length; i++)
            {
                uint lookup = crcLookupTable[(newCrc ^ data[i]) & 0xFF];
                newCrc = (newCrc >> 8) ^ lookup;
            }
            return (~newCrc);
        }

        public void Send_Packet(ref PACKET_STRUCT packet)
        {
            byte[] linear_array = new byte[26];
            byte[] crc_bytes;
    
            linear_array[0] = packet.command;
            linear_array[1] = packet.data_length;

            if(packet.data_length > 0)
            {
                Array.Copy(packet.data, 0, linear_array, 2, packet.data_length);
            }

            packet.crc = CalculateCRC(linear_array, 0, packet.data_length + 2);
    
            crc_bytes = BitConverter.GetBytes((ushort)packet.crc);
            Array.Copy(crc_bytes, 0, linear_array, packet.data_length + 2, 2);
 
            Port.Open();
            Port.Write(linear_array, 0, packet.data_length + 4);
            Port.Close();
        }

        public LCD()
        {
            PACKET_STRUCT outgoing = new PACKET_STRUCT();
            outgoing.command = 0x06;
            outgoing.data_length = 0;
            outgoing.data = null;
            Send_Packet(ref outgoing);
        }
    }
}

Then you run this to actually make an object out of the aboveusing System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        staticvoid Main(string[] args)
        {
            LCD LCD = new LCD(); 
        }
    }
}