public bool Start(NidaQmxDevice2 device) { if (Recording) { return(false); } _device = device; InOutPortFlags flags = 0; if (device.ListeningPorts.Any(p => p.Direction == ChannelDirection.Input)) { flags |= InOutPortFlags.UseInput; } if (device.ListeningPorts.Any(p => p.Direction == ChannelDirection.Output)) { flags |= InOutPortFlags.UseOutput; } if (!CreateVirtualChannel(flags)) { return(false); } if (!ConfigureDevClock(flags)) { return(false); } if (flags.HasFlag(InOutPortFlags.UseInput)) { Data = Marshal.AllocHGlobal(sizeof(double) * device.SamplesPerChannelInput * device.ListeningPorts.Count()); foreach (var port in device.ListeningPorts.OfType <NidaQmxChannelInput>()) { port.SetBufferSize(device.SamplesPerChannelInput); } } if (!RunTask(flags)) { return(false); } _stopThread = false; if (flags.HasFlag(InOutPortFlags.UseInput)) { _pollThread = new Thread(EveryNCallback); _pollThread.Start(); } Recording = true; return(true); }
private bool ConfigureDevClock(InOutPortFlags flags) { if (flags.HasFlag(InOutPortFlags.UseInput)) { var result = NidaQmxHelper.DAQmxCfgSampClkTiming( activeEdge: NidaQmxHelper.DaQmxValRising, sampleMode: NidaQmxHelper.DaQmxValContSamps, sampsPerChan: (ulong)_device.SamplesPerChannelInput, taskHandle: _device.InputTaskHandle, source: "", rate: _device.SamplerateInput ); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } } if (flags.HasFlag(InOutPortFlags.UseOutput)) { var result = NidaQmxHelper.DAQmxCfgSampClkTiming( activeEdge: NidaQmxHelper.DaQmxValRising, sampleMode: NidaQmxHelper.DaQmxValContSamps, sampsPerChan: (ulong)_device.SamplesPerChannelOutput, taskHandle: _device.OutputTaskHandle, source: "", rate: _device.SamplerateOutput ); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); NidaQmxHelper.DAQmxClearTask(_device.OutputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } result = NidaQmxHelper.DAQmxCfgOutputBuffer(_device.OutputTaskHandle, _device.SamplesPerChannelOutput); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); NidaQmxHelper.DAQmxClearTask(_device.OutputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } } return(true); }
private bool RunTask(InOutPortFlags flags) { if (flags.HasFlag(InOutPortFlags.UseInput)) { var result = NidaQmxHelper.DAQmxStartTask(_device.InputTaskHandle); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } } //if (flags.HasFlag(InOutPortFlags.UseOutput)) { // var result = NidaQmxHelper.DAQmxStartTask(_device.OutputTaskHandle); // if (result < 0) { // NidaQmxHelper.DAQmxStopTask(_device.InputTaskHandle); // NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); // NidaQmxHelper.DAQmxClearTask(_device.OutputTaskHandle); // _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); // return false; // } //} return(true); }
private bool CreateVirtualChannel(InOutPortFlags flags) { // ------------------------------------ if (flags.HasFlag(InOutPortFlags.UseInput)) { var inputs = _device.ListeningPorts.Where(port => port.Direction == ChannelDirection.Input) .Select(port => port.Name); if (inputs.Any()) { var inputPortStrings = string.Join(",", inputs); var result = NidaQmxHelper.DAQmxCreateAIVoltageChan( maxVal: 10.0, minVal: -10.0, units: NidaQmxHelper.DaQmxValVolts, terminalConfig: NidaQmxHelper.DaQmxValRse, physicalChannel: inputPortStrings, taskHandle: _device.InputTaskHandle, nameToAssignToChannel: "chanI" + _device.Name, customScaleName: null ); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.InputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } } } // ------------------------------------ if (flags.HasFlag(InOutPortFlags.UseOutput)) { var outputs = _device.ListeningPorts.Where(port => port.Direction == ChannelDirection.Output) .Select(port => port.Name); if (outputs.Any()) { var outputPortStrings = string.Join(",", outputs); var channelNumber = 0; foreach (var output in _device.ListeningPorts.Where(port => port.Direction == ChannelDirection.Output)) { ((NidaQmxChannelOutput)output).ChannelNumber = channelNumber++; } var result = NidaQmxHelper.DAQmxCreateAOVoltageChan( maxVal: 10.0, minVal: -10.0, units: NidaQmxHelper.DaQmxValVolts, physicalChannel: outputPortStrings, taskHandle: _device.OutputTaskHandle, nameToAssignToChannel: "chanO" + _device.Name, customScaleName: null ); if (result < 0) { NidaQmxHelper.DAQmxClearTask(_device.OutputTaskHandle); _device.ReportError(new DeviceErrorArgs(NidaQmxHelper.GetError(result))); return(false); } } } // ------------------------------------ return(true); }