using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Sys;

namespace Extensometer.BLL
{
    public class DAQAOClass
    {
        #region 实例、变量
        static IntPtr taskHandle = (IntPtr)(0);
        static Int32 error = 0;
        /// <summary>
        /// 是否初始化标志量
        /// </summary>
        public static bool B_IsInit = false;
        #endregion

        #region 方法
        [DllImport("msvcrt.dll")]
        public static extern int _getch();
        [DllImport("msvcrt.dll")]
        public static extern int _kbhit();
        public static void GetErrorString(Int32 errorCode)
        {
            if (errorCode < 0)
            {
                byte[] errorInfo = new byte[2048];
                ArtDAQ.ArtDAQ_GetExtendedErrorInfo(errorInfo, 2048);
                string str = Encoding.Default.GetString(errorInfo);
                Console.WriteLine("错误信息为:{0}", str);
            }
            return;
        }
        public static void Init()
        {
            string errorInfo = new string('0', 2048);
            string strTaskName = string.Empty;
            string strCardName = string.Empty;
            string strChannelName = string.Empty;

            /*********************************************/
            // ArtDAQ Configure Code
            /*********************************************/
            error = ArtDAQ.ArtDAQ_CreateTask(Encoding.Default.GetBytes("task1"), out taskHandle);

            strChannelName = "Dev1/ao1";
            //step2: CreateChannel
            error = ArtDAQ.ArtDAQ_CreateAOVoltageChan(taskHandle, Encoding.Default.GetBytes(strChannelName), Encoding.Default.GetBytes(""), -10.0, 10.0, ArtDAQ.ArtDAQ_Val_Volts, null);
            GetErrorString(error);
            if (error < 0)
            {
                return;
            }

            //step3: Start Task
            error = ArtDAQ.ArtDAQ_StartTask(taskHandle);
            GetErrorString(error);
            if (error < 0)
            {
                return;
            }
            B_IsInit = true;
            _getch();
            return;
        }
        public static void WriteAnalog(double Value)
        {

            Double[] data = new double[2];
            data[0] = Value;
            Int32 nSamplePerChanWrite;
            //step4:Write Code
            error = ArtDAQ.ArtDAQ_WriteAnalogF64(taskHandle, 1, 0, 10.0, ArtDAQ.ArtDAQ_Val_GroupByChannel, data, out nSamplePerChanWrite, (IntPtr)0);
            GetErrorString(error);
            if (error < 0)
            {
                return;
            }
            return;
        }
        public static void Dispose()
        {
            B_IsInit = false;
            Exit();
        }
        private static void Exit()
        {
            ArtDAQ.ArtDAQ_StopTask(taskHandle);
            ArtDAQ.ArtDAQ_ClearTask(taskHandle);
            _getch();
            return;
        }
        #endregion

    }
}