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   源码介绍

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对电压进行数据多路采集,USB多通道数据采集

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices; 

namespace WindowsFormsApplication1
{  
    public partial class Form1 : Form
    {
        [DllImport("usb-1000.dll")]
        public static extern int FindUSBDAQ();
        [DllImport("usb-1000.dll")]
        public static extern int OpenDevice(int DevIndex);
        [DllImport("usb-1000.dll")]
        public static extern int ResetDevice(int DevIndex);
        [DllImport("usb-1000.dll")]
        public static extern void CloseDevice(int DevIndex);
        [DllImport("usb-1000.dll")]
        public static extern int SetUSB1AiRange(int DevIndex, float Range);
        [DllImport("usb-1000.dll")]
        public static extern int SetSampleRate(int DevIndex, uint SampleRate);
        [DllImport("usb-1000.dll")]
        public static extern int SetChanSel(int DevIndex, UInt16 ChSel);
         [DllImport("usb-1000.dll")]
        public static extern int SetChanMode(int DevIndex, byte ChanMode);
        [DllImport("usb-1000.dll")]
        public static extern int SetTrigSource(int DevIndex, byte TrigSource);
        [DllImport("usb-1000.dll")]
        public static extern int SetSoftTrig(int DevIndex, byte Trig);
        //public static extern int SetTrigEdge(int DevIndex, byte TrigEdge);
        [DllImport("usb-1000.dll")]
        public static extern int ClearTrigger(int DevIndex);
        //public static extern int SetDioOut(int DevIndex, byte DioChanSel, byte DioOut);
        //public static extern int TransDioIn(int DevIndex, byte TransDioSwitch);
        //public static extern int SetCounter(int DevIndex, byte CtrNum, byte CtrMode, byte CtrEdge);
        //public static extern int StartCounter(int DevIndex, byte CtrNum, byte OnOff);
        //public static extern int InitDA(int DevIndex);
        //public static extern int SetDA(int DevIndex, byte DANum, float DAVolt);
        //public static extern int SetWavePt(int DevIndex, byte DANum, float DAVolt);
        //public static extern int ClrWavePt(int DevIndex, byte DANum);
        //public static extern int SetWaveSampleRate(int DevIndex, uint WaveSampleRate);
        //public static extern int WaveOutput(int DevIndex, byte DANum);

        [DllImport("usb-1000.dll")]
        public static extern int ClearBufs(int DevIndex);
        //public static extern int ClearCounter(int DevIndex, byte CtrNum);
        [DllImport("usb-1000.dll")]
        public static extern int StartRead(int DevIndex);
        [DllImport("usb-1000.dll")]
        public static extern int StopRead(int DevIndex);
        [DllImport("usb-1000.dll")]
        public static extern int GetAiChans(int DevIndex, int Num, UInt16 ChSel, float[] Ai, int TimeOut);
        public Form1()
        {
            InitializeComponent();
        }

        private void Read_Click(object sender, EventArgs e)
        {
            int temp , i;
            int QTYperCH , Dev_Index;
            uint SampleRate ;
            UInt16 Channel_Select = 0; 
            byte ChannelMode ;
            Dev_Index = Convert.ToInt32(Dev_Index_Input.Text);
            QTYperCH = Convert.ToInt32(QTYperCH_Input.Text);
            SampleRate = Convert.ToUInt32(SampleRate_Input.Text);
            ChannelMode = Convert.ToByte(ChannelMode_Input.Text);
            
            listView1.Clear();
            listView1.Columns.Add("Num");
            int QTYofCH = 0;
            for (i = 0; i < 16; i  )
            {
                if (Channel_Select_Input.GetItemChecked(i))
                {
                    Channel_Select = (UInt16)(Channel_Select   (UInt16)Math.Pow(2, i));
                    listView1.Columns.Add("ai"   i.ToString() );
                    QTYofCH  ;
                }
            }
            float[] ai = new float[QTYperCH * QTYofCH];
            temp = OpenDevice(Dev_Index);
            temp = ResetDevice(Dev_Index);
            temp = SetUSB1AiRange(Dev_Index, 5);			                // 设置量程
            temp = SetSampleRate(Dev_Index, SampleRate);		            // 设置采样率
            temp = SetChanMode(Dev_Index, ChannelMode);
            temp = SetChanSel(Dev_Index, Channel_Select);			        // 设置需要采集的通道，此处选择ai0~ai7

            temp = StartRead(Dev_Index);					                // 启动读取数据线程
            //Sleep(30);							                        // 等待读数线程启动完毕
            temp = SetSoftTrig(Dev_Index, 1);				                // 设置软件触发信号
            
            // 用户读取数据
            // 连续采集时循环使用GetAiChans()
            temp = GetAiChans(Dev_Index, QTYperCH, Channel_Select, ai, 4000);		// 每通道读取1000点，超时设置1000ms

            listView1.Items.Clear();
            for (i = 0; i < QTYperCH; i  )
            {
                ListViewItem lvi = new ListViewItem();
                lvi.Text = i.ToString();
                int j = 0 , k = 0;
                for (j = 0; j < 15; j  )
                {
                    if (Channel_Select_Input.GetItemChecked(j))
                    {
                        lvi.SubItems.Add(ai[k * QTYperCH   i].ToString());
                        k  ;
                    }
                }
                lvi.SubItems.Add(ai[i].ToString());
                this.listView1.Items.Add(lvi); 
            }
            temp = StopRead(Dev_Index);					    // 结束读取数据线程
            temp = SetSoftTrig(Dev_Index, 0);				// 释放软件触发信号
            //temp = ClearTrigger(Dev_Index);				// 清空触发标志
            temp = ClearBufs(Dev_Index);					// 清空所有缓存数据
            CloseDevice(Dev_Index);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            int temp;
            temp = FindUSBDAQ();
            Dev_QTY.Text = temp.ToString();
        }
    }
}