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  • C# 调用继电器api usb_relay_device.dll

    C# 调用继电器api usb_relay_device.dll 代码封装

    usb_relay_device.dll 为C++编写

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Runtime.InteropServices;
    using System.Text;
    
    namespace USBRelayTest
    {
        public class UsbRelayDeviceHelper
        {
            /// <summary>  
            /// Init the USB Relay Libary  
            /// </summary>  
            /// <returns>This function returns 0 on success and -1 on error.</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_init", CallingConvention = CallingConvention.Cdecl)]
            public static extern int Init();
    
            /// <summary>  
            /// Finalize the USB Relay Libary.  
            /// This function frees all of the static data associated with  
            /// USB Relay Libary. It should be called at the end of execution to avoid  
            /// memory leaks.  
            /// </summary>  
            /// <returns>This function returns 0 on success and -1 on error.</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_exit", CallingConvention = CallingConvention.Cdecl)]
            public static extern int Exit();
    
            /// <summary>  
            /// Enumerate the USB Relay Devices.  
            /// </summary>  
            /// <returns></returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_enumerate", CallingConvention = CallingConvention.Cdecl)]
            public static extern IntPtr usb_relay_device_enumerate();
            public static UsbRelayDeviceInfo Enumerate()
            {
                IntPtr x = UsbRelayDeviceHelper.usb_relay_device_enumerate();
                UsbRelayDeviceInfo a = (UsbRelayDeviceInfo)Marshal.PtrToStructure(x, typeof(UsbRelayDeviceInfo));
                return a;
            }
    
            /// <summary>  
            /// Free an enumeration Linked List  
            /// </summary>  
            /// <param name="deviceInfo"></param>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_free_enumerate", CallingConvention = CallingConvention.Cdecl)]
            public static extern void FreeEnumerate(UsbRelayDeviceInfo deviceInfo);
    
            /// <summary>  
            /// Open device that serial number is serialNumber  
            /// </summary>  
            /// <param name="serialNumber"></param>  
            /// <param name="stringLength"></param>  
            /// <returns>This funcation returns a valid handle to the device on success or NULL on failure.</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_open_with_serial_number", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
            public static extern int OpenWithSerialNumber([MarshalAs(UnmanagedType.LPStr)] string serialNumber, int stringLength);
    
            /// <summary>  
            /// Open a usb relay device  
            /// </summary>  
            /// <param name="deviceInfo"></param>  
            /// <returns>This funcation returns a valid handle to the device on success or NULL on failure.</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_open", CallingConvention = CallingConvention.Cdecl)]
            public static extern int Open(UsbRelayDeviceInfo deviceInfo);
    
            /// <summary>  
            /// Close a usb relay device  
            /// </summary>  
            /// <param name="hHandle"></param>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_close", CallingConvention = CallingConvention.Cdecl)]
            public static extern void Close(int hHandle);
    
            /// <summary>  
            /// open a relay channel on the USB-Relay-Device  
            /// </summary>  
            /// <param name="hHandle">Which usb relay device your want to operate</param>  
            /// <param name="index">Which channel your want to open</param>  
            /// <returns>0 -- success; 1 -- error; 2 -- index is outnumber the number of the usb relay device</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_open_one_relay_channel", CallingConvention = CallingConvention.Cdecl)]
            public static extern int OpenOneRelayChannel(int hHandle, int index);
    
            /// <summary>  
            /// open all relay channel on the USB-Relay-Device  
            /// </summary>  
            /// <param name="hHandle">which usb relay device your want to operate</param>  
            /// <returns>0 -- success; 1 -- error</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_open_all_relay_channel", CallingConvention = CallingConvention.Cdecl)]
            public static extern int OpenAllRelayChannels(int hHandle);
    
            /// <summary>  
            /// close a relay channel on the USB-Relay-Device  
            /// </summary>  
            /// <param name="hHandle">which usb relay device your want to operate</param>  
            /// <param name="index">which channel your want to close</param>  
            /// <returns>0 -- success; 1 -- error; 2 -- index is outnumber the number of the usb relay device</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_close_one_relay_channel", CallingConvention = CallingConvention.Cdecl)]
            public static extern int CloseOneRelayChannel(int hHandle, int index);
    
            /// <summary>  
            /// close all relay channel on the USB-Relay-Device  
            /// </summary>  
            /// <param name="hHandle">hich usb relay device your want to operate</param>  
            /// <returns>0 -- success; 1 -- error</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_close_all_relay_channel", CallingConvention = CallingConvention.Cdecl)]
            public static extern int CloseAllRelayChannels(int hHandle);
    
            /// <summary>  
            /// status bit: High --> Low 0000 0000 0000 0000 0000 0000 0000 0000, one bit indicate a relay status.  
            /// the lowest bit 0 indicate relay one status, 1 -- means open status, 0 -- means closed status.  
            /// bit 0/1/2/3/4/5/6/7/8 indicate relay 1/2/3/4/5/6/7/8 status  
            /// </summary>  
            /// <param name="hHandle"></param>  
            /// <param name="status"></param>  
            /// <returns>0 -- success; 1 -- error</returns>  
            [DllImport("usb_relay_device.dll", EntryPoint = "usb_relay_device_get_status", CallingConvention = CallingConvention.Cdecl)]
            public static extern int GetStatus(int hHandle, ref int status);
        }
    
        /// <summary>  
        /// USB relay board info structure  
        /// </summary>  
        [StructLayout(LayoutKind.Sequential, Pack = 8)]
        public class UsbRelayDeviceInfo
        {
            [MarshalAs(UnmanagedType.LPStr)]
            public string SerialNumber;
    
            public IntPtr DevicePath { get; set; }
    
            public UsbRelayDeviceType Type { get; set; }
    
            public IntPtr Next { get; set; }
        }
    
        public enum UsbRelayDeviceType
        {
            OneChannel = 1,
            TwoChannel = 2,
            FourChannel = 4,
            EightChannel = 8
        }
    }
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  • 原文地址:https://www.cnblogs.com/mahatmasmile/p/7605939.html
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