private void button1_Click(object sender, EventArgs e)
{
ChansCount = CountChannel();
if (ChansCount == 0)
{
MessageBox.Show("请先选择通道使能");
return;
}
InitSeries();
GetChannel();
checkedListBox1.Enabled = false;
int temp = 0;
if (USB1000.FindUSBDAQ() == 0)
{
MessageBox.Show("找不到采集卡硬件，请确保已经正确连接电脑并且驱动安装正常。");
return;
}
try
{
SampleRate = Convert.ToInt32(txRate.Text);
temp = USB1000.OpenDevice(0);
temp = USB1000.ResetDevice(0);
temp = USB1000.SetUSB1AiRange(0, (int)USB1000.AiRange.V10);
temp = USB1000.SetSampleRate(0, SampleRate);
temp = USB1000.SetChanMode(0, (int)USB1000.ChannelMode.NRSE);
temp = USB1000.SetChanSel(0, selState);
temp = USB1000.SetSoftTrig(0, 1);
if (temp == 0)
{
NumToRead = SampleRate / ChansCount / 10;//每通道0.1秒读多少个数据（采样率单位是点/秒）
totalTime = 0;
Debug.WriteLine("num to read: " + NumToRead);
Debug.WriteLine("开始采集");
running = true;
//recordThread = new Thread(record);
//recordThread.Start();
temp = USB1000.StartRead(0);
timer1.Interval = 80;//ms Timer设置比0.1s略小，以保障数据无滞后不溢出
timer1.Start();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void stop()
{
if (running)
{
timer1.Stop();
running = false;
checkedListBox1.Enabled = true;
USB1000.StopRead(0); // 关闭计算机从采集卡读数线程
USB1000.SetSoftTrig(0, 0); // 关闭软件触发信号
USB1000.ClearBufs(0); // 清空数据缓存空间
USB1000.CloseDevice(0); // 关闭设备
}
}
//DataPointCollection dp;
private void timer1_Tick(object sender, EventArgs e)
{
if (running)
{
int AiFifoFree = USB1000.GetAiChans(0, NumToRead, selState, data, 1000);
lb_fifo.Text = AiFifoFree.ToString();
if (AiFifoFree < 0)
{
Debug.WriteLine("ErrorCode:" + AiFifoFree);
}
else
{
//float[,] f = new float[ChansCount, NumToRead];
float x, y;
x = data[NumToRead * 0];
y = data[NumToRead * 1];
chart1.Series[0].Points.AddXY(x, y);
//for (int k = 0; k < ChansCount; k++)
//{
//重新采样，取一部分点进行绘图，如果把所有点都用来绘图会导致刷新速度变慢。
//只读取每个通道的第一个值
//label3.Text = data[NumToRead * k].ToString();
//实际上所有数据点都毫无丢失地存储了
//for (int i = 0; i < NumToRead; i++)
//{
//f[k, i] = data[NumToRead * k + i];
//}
//}
//dataQueue.Enqueue(f);
}
lb_queue.Text = dataQueue.Count.ToString();
//当点数过多时，清空图表重新绘制
if (chart1.Series[0].Points.Count > 500)
{
for (int i = 0; i < chart1.Series.Count; i++)
{
chart1.Series[i].Points.Clear();
}
}
}
}