周立功CAN盒驱动C#调用方式

最新推荐文章于 2025-05-30 09:52:49 发布

leonid112

最新推荐文章于 2025-05-30 09:52:49 发布

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文章标签： c# byte struct dll

本文链接：https://blog.youkuaiyun.com/leonid112/article/details/5987555

本文介绍了通过ControlCAN.dll动态链接库实现CAN总线的数据接收、发送及错误信息读取的方法。具体包括PVCI_CAN_OBJ结构体定义，用于CAN消息的封装；PVCI_ERR_INFO结构体，用于获取CAN错误信息；_VCI_BOARD_INFO结构体，提供硬件版本等信息。此外，还提供了调用DLL进行数据交互的示例。

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#region CAN接受和发送数据定义
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
        public struct PVCI_CAN_OBJ
        {
            public uint ID;
            public uint TimeStamp;
            public byte TimeFlag;
            public byte SendType;
            public byte RemoteFlag;
            public byte ExternFlag;
            public byte DataLen;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
            public byte[] data;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
            public byte[] Reserved;
        }
        #endregion

        #region 其他CAN函数数据定义
        public struct PVCI_ERR_INFO
        {
            public uint ErrCode;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
            public byte[] Passive_ErrData;
            public byte ArLost_ErrData;
        }

        public struct _VCI_BOARD_INFO
        {
            public ushort hw_Version;
            public ushort fw_Version;
            public ushort dr_Version;
            public ushort in_Version;
            public ushort irq_Num;
            public byte can_Num;

            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
            public byte[] str_Serial_Num;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
            public byte[] str_hw_Type;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
            public ushort[] Reserved;
        }
        #endregion

        #region DLL连接
        //调用接受设备动态连接库
        [DllImport("ControlCAN.dll", EntryPoint = "VCI_Receive", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern uint VCI_Receive(int DevType, int DevIndex, int CANIndex, [Out] PVCI_CAN_OBJ[] pReceive, uint Len, int WaitTime);

        //调用报错动态连接库
        [DllImport("ControlCAN.dll", EntryPoint = "VCI_ReadErrInfo", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int VCI_ReadErrInfo(int DevType, int DevIndex, int CANIndex, PVCI_ERR_INFO pErrInfo);

        /*关闭设备连接库*/
        [DllImport("ControlCAN.dll", EntryPoint = "VCI_CloseDevice", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern bool VCI_CloseDevice(int DevType, int DevIndex);

        /*CAN启动CAN连接库*/
        [DllImport("ControlCAN.dll", EntryPoint = "VCI_StartCAN", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int VCI_StartCAN(int DevType, int DevIndex, int CANIndex);

        /*CAN发送连接库*/
        [DllImport("ControlCAN.dll", EntryPoint = "VCI_Transmit", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern uint VCI_Transmit(int DevType, int DevIndex, int CANIndex, PVCI_CAN_OBJ[] pSend, uint Len);
        #endregion