csharp CAN通讯代码示例

好的，关于C#和CAN通讯的代码示例，我可以为您提供以下参考：

使用CANlib库实现C#与CAN通讯的代码示例：

using System;
using System.Runtime.InteropServices;

namespace CANlib
{
    public class Canlib
    {
        [DllImport("canlib32.dll")]
        private static extern int canInitializeLibrary();

        [DllImport("canlib32.dll")]
        private static extern int canOpenChannel(int channel, int flags);

        [DllImport("canlib32.dll")]
        private static extern int canSetBusParams(int handle, int freq, int tseg1, int tseg2, int sjw, int noSamp, int syncMode);

        [DllImport("canlib32.dll")]
        private static extern int canWrite(int handle, int id, byte[] msg, int dlc, int flag);

        [DllImport("canlib32.dll")]
        private static extern int canRead(int handle, byte[] msg, int bufSize, ref int bytesRead, ref int id, ref int flags, ref long time);

        [DllImport("canlib32.dll")]
        private static extern int canClose(int handle);

        public static void InitializeLibrary()
        {
            canInitializeLibrary();
        }

        public static int OpenChannel(int channel, int flags)
        {
            return canOpenChannel(channel, flags);
        }

        public static int SetBusParams(int handle, int freq, int tseg1, int tseg2, int sjw, int noSamp, int syncMode)
        {
            return canSetBusParams(handle, freq, tseg1, tseg2, sjw, noSamp, syncMode);
        }

        public static int Write(int handle, int id, byte[] message, int dlc, int flag)
        {
            return canWrite(handle, id, message, dlc, flag);
        }

        public static int Read(int handle, byte[] message, int bufSize, ref int bytesRead, ref int id, ref int flags, ref long time)
        {
            return canRead(handle, message, bufSize, ref bytesRead, ref id, ref flags, ref time);
        }

        public static int Close(int handle)
        {
            return canClose(handle);
        }
    }
}

在C#程序中使用CANlib库进行CAN通讯时，可以按如下方式调用上述示例代码：

using System;
using System.Threading;
using CANlib;

namespace CanlibDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Canlib.InitializeLibrary();

            int channel = 0;
            int flags = Canlib.canOPEN_EXCLUSIVE;

            int handle = Canlib.OpenChannel(channel, flags);

            int freq = Canlib.canBITRATE_500K;
            int tseg1 = 4;
            int tseg2 = 3;
            int sjw = 1;
            int noSamp = 1;
            int syncMode = 0;

            Canlib.SetBusParams(handle, freq, tseg1, tseg2, sjw, noSamp, syncMode);

            byte[] message = new byte[8];
            message[0] = 0x01;
            message[1] = 0x02;
            message[2] = 0x03;
            message[3] = 0x04;
            message[4] = 0x05;
            message[5] = 0x06;
            message[6] = 0x07;
            message[7] = 0x08;

            int id = 0x123;
            int dlc = 8;
            int flag = 0;

            int result = Canlib.Write(handle, id, message, dlc, flag);

            if (result < 0)
            {
                Console.WriteLine("CAN写入错误: " + result);
            }

            byte[] readBuf = new byte[8];
            int bytesRead = 0;
            int readId = 0;
            int readFlags = 0;
            long readTime = 0;

            while (true)
            {
                result = Canlib.Read(handle, readBuf, readBuf.Length, ref bytesRead, ref readId, ref readFlags, ref readTime);

                if (result < 0)
                {
                    Console.WriteLine("CAN读取错误: " + result);
                }

                if (bytesRead > 0)
                {
                    Console.WriteLine("CAN读取数据: " + BitConverter.ToString(readBuf, 0, bytesRead));
                }

                Thread.Sleep(10);
            }

            Canlib.Close(handle);
        }
    }
}

希望这个示例对您有所帮助，如有任何问题，欢迎随时咨询我！