//timer2的函数,用于得到电压
        private void timer2_Tick(object sender, EventArgs e)
        {
            DateTime time_record = DateTime.Now;      //记录每次采集数据时的时间,目的在于形成时间戳。
            TimeSpan timespan    = time_record - start;

            timespanList.Add((timespan.TotalSeconds).ToString("G"));
            int deviceTempID = DllClass.GetYavData(0, ref dataBuffer[0], 512, ref YavParam[0], ref CNTBuffer[0], ref IOBuffer[0]);

            Console.WriteLine("dataBuffer[1]: " + dataBuffer[1]);
            // val1 = (dataBuffer[1] * 30.0 / 4095) * 1.011 + 0.01;  //最小二乘函数
            val1 = (dataBuffer[1] * 30.0 / 4095) * 1.011 + 0.002;      //最小二乘函数
            voltList.Add(val1.ToString());
            this.Invoke(textVoltChanged, new string[] { val1 + "" });
            Console.WriteLine("val1: " + val1);
        }
        private void stopExp()
        {
            end_cancel      = DateTime.Now;
            button2.Enabled = true;
            button3.Enabled = false;
            timer1.Enabled  = false;
            timer2.Enabled  = false;
            timer3.Enabled  = false; //到达规定的时间后,计时器停止。
            sp2.Close();
            int cyd = DllClass.CloseYavDevice(0);

            Console.WriteLine("cyd " + cyd);
            if (cyd != 1)  //1代表设备正常关闭,来源:厂商技术人员说的。
            {
                MessageBox.Show("采集卡设备未正常关闭!");
            }
            saveSpectralAndVoltData();
        }
        //点击开始按钮发生的事件
        private void button2_Click(object sender, EventArgs e)
        {
            //每次点击开始测试时,都将flag的值置为false
            flag = false; //表示先采集亮度的数据

            //获取最大电流密度
            int    I_intensity = Convert.ToInt32(textBox6.Text);
            int    len         = Convert.ToInt32(textBox4.Text);
            int    width       = Convert.ToInt32(textBox5.Text);
            double d           = (I_intensity / (len * width)) * 1000;

            I_maxIntensity = d.ToString("G");
            label14.Text   = I_maxIntensity;

            //设置计时器的时间间隔
            time            = int.Parse(textBox1.Text) * 1000;
            timer1.Interval = time;  //用于测试亮度的计时器
            timer2.Interval = time;  //用于测试电压的计时器
            String timer3_interval = textBox7.Text;

            timer3.Interval = int.Parse(timer3_interval) * 60000; //分钟转为毫秒

            start           = DateTime.Now;
            illuminaceList  = new List <string>();
            voltList        = new List <string>();
            timespanList    = new List <string>();
            button2.Enabled = false;
            button3.Enabled = true;
            if (!sp2.IsOpen)
            {
                sp2.Open();
                sp2.Close();
                Thread.Sleep(1000);
                sp2.Open();
                String command = "d\n";
                sp2.WriteLine(command);
                String command0 = "S,,,,,,,1\n";
                sp2.WriteLine(command0);
            }
            else
            {
                sp2.Close();
                Thread.Sleep(1000);
                sp2.Open();
                String command = "d\n";
                sp2.WriteLine(command);
                String command0 = "S,,,,,,,1\n";
                sp2.WriteLine(command0);
            }



            int num = DllClass.FindDevice();

            Console.WriteLine("设备数: " + num);
            if (num > 0)
            {
                int openFlag = DllClass.OpenYavDevice(0);
                if (openFlag == 1)
                {
                    Byte[] param = { 0x07, 0, 0, 0 };
                    //设置设备 0 的采样率为 1K
                    int result = DllClass.SetYavParam(0, 0xFA, ref param[0]);
                    //只有配置正确后,才能进行测试电压和亮度
                    timer1.Enabled = true;
                    timer2.Enabled = true;
                    timer3.Enabled = true;
                }
                else
                {
                    MessageBox.Show("usb设备未打开");
                }
            }
            else
            {
                MessageBox.Show("没有发现usb设备");
            }
        }