C#使用NIDAQmx采集电压

引用

NationalInstruments.Common

NationalInstruments.DAQmx

位置是在：

安装位置\NationalInstruments\MeasurementStudioVS2010\DotNET\Assemblies\Current

这个.NET的版本要和这两个DLL匹配

首先，

using NationalInstruments.DAQmx;

Task analogInTask = new Task();
AIChannel myChannel;
myChannel = analogInTask.AIChannels.CreateVoltageChannel( "dev1/ai2","myChannel", AITerminalConfiguration.Rse,-10, 10,AIVoltageUnits.Volts);
analogInTask.Start();
AnalogSingleChannelReader reader = new AnalogSingleChannelReader(analogInTask.Stream);
double data = reader.ReadSingleSample();
analogInTask.Stop();
analogInTask.Dispose();

这是从官网找到的例子，进行了稍稍的修改

如果要进行两个接口的读取，个人的办法是先Stop上一个Task，再Start新的Task.即一个时候只能有一个Task在Running

附上C++版，读取两个接口的电压

    //Declare a digital output task.int32       error = 0;TaskHandle  AItaskHandle = 0;TaskHandle  AItaskHandle2=0;float64     data = 0.0;float64     data2 = 0.0;int32       i = 0;char        errBuff[2048] = { '\0' };//Configure your analog input tasks.//DAQmxErrChk(DAQmxCreateTask("", &AItaskHandle));if(DAQmxFailed(DAQmxCreateTask("", &AItaskHandle))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle != 0) {DAQmxStopTask(AItaskHandle);DAQmxClearTask(AItaskHandle);}}if(DAQmxFailed(DAQmxCreateTask("", &AItaskHandle2))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle2 != 0) {DAQmxStopTask(AItaskHandle2);DAQmxClearTask(AItaskHandle2);}}//DAQmxErrChk(DAQmxCreateAIVoltageChan(AItaskHandle, "Dev1/ai0", "", DAQmx_Val_Cfg_Default, -10.0, 10.0, DAQmx_Val_Volts, NULL));if(DAQmxFailed(DAQmxCreateAIVoltageChan(AItaskHandle, "Dev1/ai0", "", DAQmx_Val_Cfg_Default, -10.0, 10.0, DAQmx_Val_Volts, NULL))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle != 0) {DAQmxStopTask(AItaskHandle);DAQmxClearTask(AItaskHandle);}}if(DAQmxFailed(DAQmxCreateAIVoltageChan(AItaskHandle2, "Dev1/ai2", "", DAQmx_Val_Cfg_Default, -10.0, 10.0, DAQmx_Val_Volts, NULL))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle2 != 0) {DAQmxStopTask(AItaskHandle2);DAQmxClearTask(AItaskHandle2);}}//Add digital output to Start Code.//DAQmxErrChk(DAQmxStartTask(AItaskHandle));//check the voltage values with each read.//DAQmxErrChk(DAQmxReadAnalogScalarF64(AItaskHandle, 100, &data, NULL));if(DAQmxFailed(DAQmxStartTask(AItaskHandle))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle != 0) {DAQmxStopTask(AItaskHandle);DAQmxClearTask(AItaskHandle);}}if(DAQmxFailed(DAQmxReadAnalogScalarF64(AItaskHandle, 10, &data, NULL))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle != 0) {DAQmxStopTask(AItaskHandle);DAQmxClearTask(AItaskHandle);}}DAQmxStopTask(AItaskHandle);//DAQmxClearTask(AItaskHandle);if(DAQmxFailed(DAQmxStartTask(AItaskHandle2))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle2 != 0) {DAQmxStopTask(AItaskHandle2);DAQmxClearTask(AItaskHandle2);}}if(DAQmxFailed(DAQmxReadAnalogScalarF64(AItaskHandle2, 100, &data2, NULL))){DAQmxGetExtendedErrorInfo(errBuff, 2048);printf("DAQmx Error: %s\n", errBuff);std::cout<<"DAQmx Error: "<<errBuff<<std::endl;if (AItaskHandle2 != 0) {DAQmxStopTask(AItaskHandle2);DAQmxClearTask(AItaskHandle2);}}DAQmxStopTask(AItaskHandle2);

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