private void cbDevices_SelectedIndexChanged(object sender, EventArgs e)
{
if (device != null)
{
device.StopDacq();
device.Disconnect();
device.Dispose();
device = null;
}
uint sel = (uint)cbDevices.SelectedIndex;
/* choose one of the following contructors:
* The first one uses the OnNewData callback and gives you a reference to the raw multiplexed data,
* this could be used without further initialisation
* The second uses the more advanced callback which gives you the data for each channel in a callback, but need initialistation
* for buffers and the selected channels
*/
if (sel >= 0) // a device is selected, enable the sampling buttons
{
btStart.Enabled = true;
}
else
{
btStart.Enabled = false;
}
btStop.Enabled = false;
device = new CMeaDeviceNet(usblist.GetUsbListEntry(sel).DeviceId.BusType, OnChannelData, OnError);
device.Connect(usblist.GetUsbListEntry(sel));
device.SendStop(); // only to be sure
tbDeviceInfo.Text = "";
tbDeviceInfo.Text += /*"Serialnumber: " +*/ device.SerialNumber + "\r\n";
int hwchannels;
device.HWInfo().GetNumberOfHWADCChannels(out hwchannels);
tbDeviceInfo.Text += "Number of Hardwarechannels: " + hwchannels.ToString() + "\r\n";
// configure MeaDevice: MC_Card or Usb
device.SetNumberOfChannels(hwchannels);
int samplingrate = 5000; // MC_Card does not support all settings, please see MC_Rack for valid settings
device.SetSampleRate(samplingrate, 1, 0);
int gain;
device.GetGain(out gain);
List <CMcsUsbDacqNet.CHWInfo.CVoltageRangeInfoNet> voltageranges;
device.HWInfo().GetAvailableVoltageRangesInMicroVoltAndStringsInMilliVolt(out voltageranges);
for (int i = 0; i < voltageranges.Count; i++)
{
tbDeviceInfo.Text += "(" + i.ToString() + ") " + voltageranges[i].VoltageRangeDisplayStringMilliVolt + "\r\n";
}
// Set the range acording to the index (only valid for MC_Card)
// device.SetVoltageRangeInMicroVoltByIndex(0, 0);
device.EnableDigitalIn(true, 0);
// Checksum not supported by MC_Card
device.EnableChecksum(true, 0);
// Get the layout to know how the data look like that you receive
int ana, digi, che, tim, block;
device.GetChannelLayout(out ana, out digi, out che, out tim, out block, 0);
// or
device.GetChannelsInBlock(out block);
m_block = block;
// set the channel combo box with the channels
SetChannelCombo(block);
channelblocksize = samplingrate / 10; // good choice for MC_Card
bool[] selChannels = new bool[block];
for (int i = 0; i < block; i++)
{
selChannels[i] = true; // With true channel i is selected
//Console.WriteLine("Selected: " + block);
// selChannels[i] = false; // With false the channel i is deselected
}
// queue size and threshold should be selected carefully
device.SetSelectedData(selChannels, 10 * channelblocksize, channelblocksize, SampleSizeNet.SampleSize16, block);
// Alternative call if you want to select all channels
//device.SetSelectedData(block, 10 * channelblocksize, channelblocksize, CMcsUsbDacqNet.SampleSize.Size16, block);
m_channel_handles = block; // for this case, if all channels are selected
}
public bool connectDataAcquisitionDevice(uint index)
{
this.dataFormat = SampleSizeNet.SampleSize32Signed;
if (dataAcquisitionDevice != null)
{
dataAcquisitionDevice.StopDacq();
dataAcquisitionDevice.Disconnect();
dataAcquisitionDevice.Dispose();
dataAcquisitionDevice = null;
throw new System.ArgumentException("Reached bad code path", "DAQ is null, mcs cruft");
}
dataAcquisitionDevice = new CMeaDeviceNet(usblist.GetUsbListEntry(index).DeviceId.BusType,
_onChannelData,
onError);
// The second arg refers to lock mask, allowing multiple device objects to be connected
// to the same physical device. Yes, I know, what the f**k...
dataAcquisitionDevice.Connect(usblist.GetUsbListEntry(index), 1);
dataAcquisitionDevice.SendStop();
int what = 0;
dataAcquisitionDevice.HWInfo().GetNumberOfHWADCChannels(out what);
hwchannels = what;
dataAcquisitionDevice.SetNumberOfChannels(hwchannels);
dataAcquisitionDevice.EnableDigitalIn(false, 0);
dataAcquisitionDevice.EnableChecksum(false, 0);
dataAcquisitionDevice.SetDataMode(DataModeEnumNet.dmSigned32bit, 0);
// block:
// get the number of 16 bit datawords which will be collected per sample frame,
// use after the device is configured. (which means?, setting data mode, num channels etc?)
int ana, digi, che, tim, block;
dataAcquisitionDevice.GetChannelLayout(out ana, out digi, out che, out tim, out block, 0);
dataAcquisitionDevice.SetSampleRate(samplerate, 1, 0);
int gain = dataAcquisitionDevice.GetGain();
List <CMcsUsbDacqNet.CHWInfo.CVoltageRangeInfoNet> voltageranges;
dataAcquisitionDevice.HWInfo().
GetAvailableVoltageRangesInMicroVoltAndStringsInMilliVolt(out voltageranges);
bool[] selectedChannels = new bool[block];
for (int i = 0; i < block; i++)
{
selectedChannels[i] = true;
} // hurr
// *org [[file:killme.cs::/%20a%20device%20are%20read%20in%2032%20bit%20data%20format%20nChannels%20=%20ChannelsInBlock/2][documentation]]
bool[] nChannels = selectedChannels;
int queueSize = 120000;
int threshold = segmentLength;
SampleSizeNet sampleSize = dataFormat;
int ChannelsInBlock = block / 2;
dataAcquisitionDevice.SetSelectedChannelsQueue
(nChannels,
queueSize, // huh?
threshold,
sampleSize,
ChannelsInBlock);
mChannelHandles = block;
dataAcquisitionDevice.ChannelBlock_SetCheckChecksum((uint)che, (uint)tim); // ???
// int voltrange = voltageranges.ToArray()[0];
int validDataBits = -1;
int deviceDataFormat = -1;
/**
* Summary:
* Get the real number of data bits.
*
* Remarks:
* This value may be different from the value returned by GetDataFormat, e.g. in
* MC_Card the data are shifted 2 bits so the real number is 14 while the data format
* is 16 bits
*/
dataAcquisitionDevice.GetNumberOfDataBits(0,
DacqGroupChannelEnumNet.HeadstageElectrodeGroup,
out validDataBits);
dataAcquisitionDevice.GetDataFormat(0,
DacqGroupChannelEnumNet.HeadstageElectrodeGroup,
out deviceDataFormat);
DataModeEnumNet dataMode = dataAcquisitionDevice.GetDataMode(0);
/**
* Summary:
* Get the number of 16 bit datawords which will be collected per sample frame,
* use after the device is configured.
*
* Returns:
* Number of 16 bit datawords per sample frame.
* Returns 132 (66 32 bit words???)
*/
int meme = dataAcquisitionDevice.GetChannelsInBlock();
deviceInfo =
"Data acquisition device connected to physical device with parameters: \n" +
$"[SetSelectedChannelsQueue arguments:]\n" +
$"nChannels \t{selectedChannels}\n" +
$"queueSize: \t{queueSize}\n" +
$"threshold: \t{threshold}\n" +
$"samplesize: \t{sampleSize}\n" +
$"channelsInBlock: \t{ChannelsInBlock}\n\n" +
$"[Experiment params]\n" +
$"sample rate: \t{samplerate}\n" +
$"Voltage range: \t{voltageranges[0].VoltageRangeDisplayStringMilliVolt}\n" +
$"Corresponding to \t{voltageranges[0].VoltageRangeInMicroVolt} µV\n" +
$"[Device channel layout]\n\n" +
$"hardware channels: \t{hwchannels}\n" + // 64
$"analog channels: \t{ana}\n" + // 128
$"digital channels: \t{digi}\n" + // 2
$"che(??) channels: \t{che}\n" + // 4
$"tim(??) channels: \t{tim}\n\n" +
$"[Other..]\n" +
$"valid data bits: \t{validDataBits}\n" + // 24
$"device data format: \t{deviceDataFormat}\n" + // 32
$"device data mode: \t{dataMode}\n" + // dmSigned24bit
$"nice meme: \t{meme}\n" +
"";
return(true);
}