/// <summary>
/// 创建DeviceApplication新实例
/// </summary>
/// <param name="deviceIndex">设备索引</param>
public VirtualOscilloscope(int deviceIndex)
{
DeviceIndex = deviceIndex;
//打开设备
if (HardwareControl.dsoOpenDevice((ushort)deviceIndex) == 0)
{
throw new Exception("设备打开失败!");
}
IsOpen = true;
//获取标定数据
calData = Marshal.AllocHGlobal(2 * 32);
if (HardwareControl.dsoGetCalLevel((ushort)deviceIndex, calData, 32) == 0)
{
throw new Exception("读取校正数据失败!");
}
//设置参数
CH1VoltageDIV = EVoltageDIV.DIV_1V;
CH2VoltageDIV = EVoltageDIV.DIV_1V;
TimeDIV = ETimeDIV.DIV_1MSaS;
SampleTime = 100;
}
/// <summary>
/// 读取设备数据
/// </summary>
/// <param name="sampleCount">采样数据</param>
/// <param name="channel1Array">通道1数据</param>
/// <param name="channel2Array">通道2数据</param>
/// <param name="triggerPointIndex">触发点位置</param>
public void ReadDeviceData(int sampleCount, out short[] channel1Array, out short[] channel2Array, out uint triggerPointIndex)
{
//加线程锁
lock (deviceLock)
{
//提取数据
channel1Array = new short[sampleCount];
channel2Array = new short[sampleCount];
triggerPointIndex = 0;
//创建内存空间
IntPtr channel1Data = IntPtr.Zero;
IntPtr channel2Data = IntPtr.Zero;
try
{
channel1Data = Marshal.AllocHGlobal(sizeof(short) * sampleCount);
channel2Data = Marshal.AllocHGlobal(sizeof(short) * sampleCount);
for (int i = 0; i < sampleCount / maxSampleCount; i++)
{
//获取硬件采样数据
if (HardwareControl.dsoReadHardData((ushort)DeviceIndex,
IntPtr.Add(channel1Data, i * maxSampleCount * sizeof(short)),
IntPtr.Add(channel2Data, i * maxSampleCount * sizeof(short)),
(uint)maxSampleCount, calData,
(int)CH1VoltageDIV, (int)CH2VoltageDIV,
(short)TriggerSweep, (short)TriggerSource,
TriggerLevel, (short)TriggerSlope,
(int)TimeDIV, HorizontalTriggerPosition,
(uint)maxSampleCount, ref triggerPointIndex,
(short)InsertMode) != -1)
{
}
}
if ((sampleCount % maxSampleCount) != 0)
{
int surplusCount = sampleCount % maxSampleCount;
//获取硬件采样数据
if (HardwareControl.dsoReadHardData((ushort)DeviceIndex,
IntPtr.Add(channel1Data, (sampleCount - surplusCount) * sizeof(short)),
IntPtr.Add(channel2Data, (sampleCount - surplusCount) * sizeof(short)),
(uint)surplusCount, calData,
(int)CH1VoltageDIV, (int)CH2VoltageDIV,
(short)TriggerSweep, (short)TriggerSource,
TriggerLevel, (short)TriggerSlope,
(int)TimeDIV, HorizontalTriggerPosition,
(uint)surplusCount, ref triggerPointIndex,
(short)InsertMode) != -1)
{
}
}
//数据拷贝
unsafe
{
short *ch1 = (short *)channel1Data.ToPointer();
short *ch2 = (short *)channel2Data.ToPointer();
for (int i = 0; i < sampleCount; i++)
{
channel1Array[i] = ch1[i];
channel2Array[i] = ch2[i];
}
}
}
catch (Exception)
{
}
finally
{
if (channel1Data != IntPtr.Zero)
{
Marshal.FreeHGlobal(channel1Data);
channel1Data = IntPtr.Zero;
}
if (channel2Data != IntPtr.Zero)
{
Marshal.FreeHGlobal(channel2Data);
channel2Data = IntPtr.Zero;
}
}
}
}