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C#呼叫指標DLL存取USB[CS_call_cpp_pointer_dll_for_usb] ~ EasyCOM/RD200 GITHUB: https://github.com/jash-git/CS_call_cpp_pointer_dll_for_usb C# 使用 unsafe + fixed 建立使用指標 C# 建立 DLL 函數原型宣告檔 C# 使用 class 宣告 struct  DLL using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; [StructLayout(LayoutKind.Sequential)] public struct MW_EasyPOD { public uint VID; // Need to match user device's "Vendor ID". public uint PID; // Need to match user device's "Product ID". public uint ReadTimeOut; // Specifies the read data time-out interval, in milliseconds. public uint WriteTimeOut; // Specifies the write data time-out interval, in milliseconds. public uint Handle; // Do not modify this value, reserved for DLL public uint FeatureReportSize; // Do not modify this value, reserved for DLL public uint InputReportSize; // Do not modify this value, reserved for DLL public uint OutputReportSize; // Do not modify this value, reserved for DLL } class PODfuncs { [DllImport("EasyPOD.dll", CallingConvention = CallingConvention.StdCall)] unsafe public static extern uint ConnectPOD(MW_EasyPOD* pEasyPOD, uint Index); [DllImport("EasyPOD.dll", CallingConvention = CallingConvention.StdCall)] unsafe public static extern uint WriteData(MW_EasyPOD* pEasyPOD, byte[] lpBuffer, uint nNumberOfBytesToWrite, uint* lpNumberOfBytesWritten); [DllImport("EasyPOD.dll", CallingConvention = CallingConvention.StdCall)] unsafe public static extern uint ReadData(MW_EasyPOD* pEasyPOD, byte[] lpBuffer, uint nNumberOfBytesToRead, uint* lpNumberOfBytesRead); [DllImport("EasyPOD.dll", CallingConvention = CallingConvention.StdCall)] unsafe public static extern uint DisconnectPOD(MW_EasyPOD* pEasyPOD); [DllImport("EasyPOD.dll", CallingConvention = CallingConvention.StdCall)] unsafe public static extern uint ClearPODBuffer(MW_EasyPOD* pEasyPOD); } Main using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; //using System.BitConverter; namespace WindowsFormsApplication6 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } public MW_EasyPOD EasyPOD; unsafe public void btnGetUID_Click(object sender, EventArgs e) { UInt32 drResult, dwResult, Index, uiWritten, uiRead; byte[] WriteBuffer_SN = new byte[] { 0x02, 0x01, 0x0D };//Command {STX, LEN, CMD,.....} byte[] sResponse_SN = null; sResponse_SN = new byte[10+2]; EasyPOD.VID = 0xe6a; EasyPOD.PID = 0x317; Index = 1; fixed (MW_EasyPOD* pPOD = &EasyPOD) { dwResult = PODfuncs.ConnectPOD(pPOD, Index); if ((dwResult != 0)) { MessageBox.Show("Not connected yet"); } else { EasyPOD.ReadTimeOut = 200; EasyPOD.WriteTimeOut = 200; dwResult = PODfuncs.WriteData(pPOD, WriteBuffer_SN, Convert.ToUInt32(WriteBuffer_SN.Length), &uiWritten); drResult = PODfuncs.ReadData(pPOD, sResponse_SN, Convert.ToUInt32(sResponse_SN.Length), &uiRead); txbGetSNh.Text = BitConverter.ToString(sResponse_SN,4).Replace("-"," "); //HEX txbGetSNt.Text = System.Text.Encoding.Default.GetString(sResponse_SN, 4, sResponse_SN.Length - 4); //ASCII } dwResult = PODfuncs.ClearPODBuffer(pPOD); dwResult = PODfuncs.DisconnectPOD(pPOD); } } private void btnClose_Click(object sender, EventArgs e) { Close(); } } }