public void releaseDevice()
{
if (cfgPara.hDevice != (IntPtr)(-1))
{
NET2991A.NET2991_AI_StopTask(cfgPara.hDevice);
NET2991A.NET2991_DEV_Release(cfgPara.hDevice);
cfgPara.hDevice = (IntPtr)(-1);
}
}
public bool start()
{
Int32 dwChanCnt = 0;
Int32 nIndex = 0;
for (nIndex = 0; nIndex < NET2991A.NET2991A_MAX_CHANNELS; nIndex++)
{
if (cfgPara.AAIParam.CHParam[nIndex].bChannelEn == 1)
{
dwChanCnt++;
}
}
// 实际总共需要读取的数据数
cfgPara.dwRealReadLen = 2 * dwChanCnt * cfgPara.nReadLength;
// 初始化
cfgPara.nSampStatus = UserDef.CMD_UNCPT;
cfgPara.dwReadDataSize = 0;
cfgPara.bAIStatus = 0;
// 读取数据的长度
cfgPara.dwFrameLen = UserDef.LMT_FRMCNT;
// 启动采样
if (NET2991A.NET2991_AI_StartTask(cfgPara.hDevice) == 0)
{
Console.WriteLine("2911A启动任务失败!");
if (cfgPara.hDevice != (IntPtr)(-1))
{
NET2991A.NET2991_AI_StopTask(cfgPara.hDevice);
NET2991A.NET2991_DEV_Release(cfgPara.hDevice);
cfgPara.hDevice = (IntPtr)(-1);
}
return(false);
}
needStop = false;
Thread tDataRead = new Thread(ReadDataFun);
tDataRead.Start();
return(true);
}
public bool InitDevice(string strIP, string strDevPort, string strLocalPort, MsgUpdateDelegate std)
{
Int32 nIndex = 0;
Int32 ipaddr = inet_addr(strIP);
cfgPara.AAIParam.nDeviceIP = (UInt32)(System.Net.IPAddress.NetworkToHostOrder(ipaddr));
cfgPara.AAIParam.nDevicePort = Convert.ToUInt16(strDevPort);
cfgPara.AAIParam.nLocalPort = Convert.ToUInt16(strLocalPort);
cfgPara.AAIParam.CHParam[16].bChannelEn = 0;
for (nIndex = 0; nIndex < 16; nIndex++)
{
cfgPara.AAIParam.CHParam[nIndex].bChannelEn = 1;
cfgPara.AAIParam.CHParam[nIndex].nSampleRange = NET2991A.NET2991A_AI_SAMPRANGE_N5_P5V;
cfgPara.AAIParam.CHParam[nIndex].nRefGround = NET2991A.NET2991A_AI_REFGND_RSE;
}
cfgPara.AAIParam.fSampleRate = UserDef.Frequency; //;
cfgPara.AAIParam.nSampleMode = NET2991A.NET2991A_AI_SAMPMODE_CONTINUOUS;
cfgPara.AAIParam.nSampsPerChan = 102400;
cfgPara.AAIParam.nClockSource = NET2991A.NET2991A_AI_CLOCKSRC_LOCAL;
cfgPara.AAIParam.nReserved0 = 0;
cfgPara.AAIParam.nTriggerSource = NET2991A.NET2991A_AI_TRIGSRC_NONE;
cfgPara.AAIParam.nTriggerDir = NET2991A.NET2991A_AI_TRIGDIR_FALLING;
cfgPara.AAIParam.fTriggerLevel = 10;
cfgPara.AAIParam.nDelaySamps = 0;
cfgPara.AAIParam.nReTriggerCount = 1;
cfgPara.AAIParam.bMasterEn = 0;
cfgPara.AAIParam.nReserved1 = 0;
cfgPara.AAIParam.nReserved2 = 0;
cfgPara.nReadOffset = 0;
cfgPara.nReadLength = 16 * UserDef.Frequency;
cfgPara.hDevice = (IntPtr)(-1);
UInt16 nDataTranDir = NET2991A.NET2991A_AI_TRANDIR_CLIENT;
NET2991A.NET2991_DEV_SetSendSpeed(3);
if (cfgPara.hDevice != (IntPtr)(-1))
{
NET2991A.NET2991_AI_StopTask(cfgPara.hDevice);
NET2991A.NET2991_DEV_Release(cfgPara.hDevice);
}
// 创建设备
cfgPara.hDevice = NET2991A.NET2991_DEV_Create(cfgPara.AAIParam.nDeviceIP,
cfgPara.AAIParam.nDevicePort,
cfgPara.AAIParam.nLocalPort,
nDataTranDir, 0.2, 0.2, 2);
bool isSuccess = true;
mstd = std;
if (cfgPara.hDevice == (IntPtr)(-1))
{
mstd("2991A创建设备失败!");
isSuccess = false;
}
// 判断是否连接
else if (NET2991A.NET2991_DEV_IsLink(cfgPara.hDevice) == 0)
{
mstd("2991A设备没有连接!");
isSuccess = false;
}
// 初始化设备
else if (NET2991A.NET2991_AI_InitTask(cfgPara.hDevice, ref cfgPara.AAIParam, (IntPtr)(-1)) == 0)
{
mstd("2991A初始化设备失败!");
isSuccess = false;
} // 不保存文件
else if (NET2991A.NET2991_AI_IsSaveFile(cfgPara.hDevice, 0) == 0)
{
mstd("2911A设置文件保存失败!");
isSuccess = false;
}
// 清除缓存
else if (NET2991A.NET2991_AI_ClearBuffer(cfgPara.hDevice) == 0)
{
mstd("2991A清除缓存失败!");
}
if (!isSuccess && cfgPara.hDevice != (IntPtr)(-1))
{
NET2991A.NET2991_AI_StopTask(cfgPara.hDevice);
NET2991A.NET2991_DEV_Release(cfgPara.hDevice);
cfgPara.hDevice = (IntPtr)(-1);
return(false);
}
return(true);
}
static void ReadDataFun()
{
UInt16[] nAIArray = new UInt16[2048];
UInt32 dwReadChan = 0;
//UInt16[] threaholdMarker = new UInt16[16]; // mark is need to save
UInt64 bufferCount = 0;
UInt32 indexPerChannel = 0;
UInt32 dwReadSampsPerChan = 0;
UInt32 dwSampsPerChanRead = 0;
UInt32 dwAvailSampsPerChan = 0;
double fTimeOut = -1.0;
Int32 nIndex = 0;
Single fVoltData = 0.0F;
Int16 tmp = 0;
switch (cfgPara.AAIParam.CHParam[nIndex].nSampleRange)
{
case NET2991A.NET2991A_AI_SAMPRANGE_N10_P10V:
fPerLsb = 20000.0F / 65536;
break;
case NET2991A.NET2991A_AI_SAMPRANGE_N5_P5V:
fPerLsb = 10000.0F / 65536;
break;
case NET2991A.NET2991A_AI_SAMPRANGE_N2D5_P2D5V:
fPerLsb = 5000.0F / 65536;
break;
case NET2991A.NET2991A_AI_SAMPRANGE_N1D25_P1D25V:
fPerLsb = 2500.0F / 65536;
break;
default:
break;
}
// 根据用户设置的读取长度设置每通道数据的读取长度
UInt32 nChanSize = (uint)(cfgPara.nReadLength * 2);
// 读数据
while (true)
{
try
{
if (needStop)
{
break;
}
dwReadSampsPerChan = 1024;
//long t1 = System.DateTime.Now.Ticks;
// 连续采集模式下数据排列顺序为16路DI第一个采样点、CH0第一个采样点、CH1第一个采样点、CH2第一采样点.....CH15第一个采样点、16路DI第二个采样点...
if (NET2991A.NET2991_AI_ReadBinary(cfgPara.hDevice, ref dwReadChan, nAIArray, dwReadSampsPerChan, ref dwSampsPerChanRead, ref dwAvailSampsPerChan, fTimeOut) == 0)
{
if (needStop)
{
break;
}
continue;
}
/*long t2 = System.DateTime.Now.Ticks;
* Console.WriteLine("wwwwwwwwww " + (t2 - start) / 10000000);
* start = t2;*/
if (needStop)
{
break;
}
//16通道，采集够1秒数据在处理
//先将数据放进缓存，这里确认每次读回来的数据远小于1秒数据，所以不考虑溢出
for (UInt16 n = 0; n < 1000; n++)
{
if (((n + 1) << 4) > dwSampsPerChanRead)
{
break;
}
int bn = n << 4;
for (int i = 0; i < 16; i++)
{
buffer[currentFrameCount % 2, i, indexPerChannel] = nAIArray[bn + i];
}
indexPerChannel++;
}
bufferCount += dwSampsPerChanRead;
if (bufferCount < (ulong)UserDef.Frequency * 16 + 1 - dwSampsPerChanRead) // 500kps*16
{ //如果还不够一帧数据
continue;
}
else
{
bufferCount = 0;
indexPerChannel = 0;
currentFrameCount++;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
if (cfgPara.hDevice != (IntPtr)(-1))
{
Thread.Sleep(500);
NET2991A.NET2991_AI_StopTask(cfgPara.hDevice);
NET2991A.NET2991_DEV_Release(cfgPara.hDevice);
cfgPara.hDevice = (IntPtr)(-1);
}
}
public NET2991A()
{
cfgPara.AAIParam.szDevName = new SByte[32];
cfgPara.AAIParam.CHParam = new NET2991A.NET2991A_CH_PARAM[17];
NET2991A.NET2991_DEV_Init(4096);
}
