各位老师：你们好！我现在在用ADLINK PCI9812进行数据采集，我有个问题希望能到老师们的解惑。我用matlab和c++实现了对第一个通道的数据采集，但我希望能实现单独对第二个通道的数据采集。我用的是XP SP2系统，下面是我的程序，可是就是不能采集数据，请老师们帮看看问题出在哪，非常感谢。 /* $Revision: 1.1 $ */ // mexSample.cpp // Automatically generated by Matlab AppWizard version 1.0 // // This is the gateway routine for a MATLAB Math/Graphics Library-based // C MATLAB MEX File. #include "afx.h" #include "mex.h" #include "math.h" #include "dask.h" #include "DAQHeader.h" int StartSample(U32 ScanCount,F32 SampleRate,double *dpDataOut); void mexFunction( int nlhs, // Number of left hand side (output) arguments mxArray *plhs[], // Array of left hand side arguments int nrhs, // Number of right hand side (input) arguments const mxArray *prhs[] // Array of right hand side arguments ) { U32 ScanCount; F32 SampleRate; long nResult; double dResult,*dpDataOut=NULL; if(nrhs!=2) mexErrMsgTxt("Only two input argument is allowed."); else if(nlhs>2) mexErrMsgTxt("Only two output argument is allowed."); ScanCount=(long)mxGetScalar(prhs[0]); SampleRate=*(mxGetPr(prhs[1])); //dpDataOut=(double *)mxCalloc(nDataNum, sizeof(double)); plhs[0]=mxCreateDoubleMatrix(ScanCount,1,mxREAL); dpDataOut=mxGetPr(plhs[0]); nResult=StartSample(ScanCount,SampleRate,dpDataOut); dResult=nResult; plhs[1]=mxCreateScalarDouble(dResult); return; } //constants definition #define CardNumber 0 #define ADChan 0 //AI config constants definition #define ClkSel P9812_AD2_GT_PCI|P9812_CLKSRC_INT #define TriggerLevel 127 #define PostCount 0 int StartSample(U32 ScanCount, F32 SampleRate, double *dpDataOut) { I16 cardID = -1; I16 err=0; U32 AccessCnt = 0; U32 MemSize = 0; U16 InBuf[65536]; //AI data buffer F64 InVolBuf[65536]; // AI voltages buffer U32 i; cardID = Register_Card(PCI_9812, CardNumber); if (cardID<0) { return -1; //Error occurs !! //ToDo : Handle error here } err = AI_InitialMemoryAllocated(cardID,&MemSize); if (err!=NoError) { //Error occurs !! //ToDo : Handle error here } if (MemSize*1024 < ScanCount*sizeof(I16) ) { //available memory size for analog input in the device driver //is smaller than the data size specified!! //ToDo : do something here } err = AI_AsyncDblBufferMode(cardID, 0); if (err!=NoError) { //Error occurs !! //ToDo : Handle error here } err=AI_9812_Config(cardID, P9812_TRGMOD_SOFT, P9812_TRGSRC_CH1, P9812_TRGSLP_POS, ClkSel, TriggerLevel, PostCount); if (err!=NoError) { //Error occurs !! //ToDo : Handle error here } err=AI_ContReadChannel (cardID, ADChan, AD_B_1_V, InBuf, ScanCount, SampleRate, SYNCH_OP); if (err!=NoError) { //Error occurs !! //ToDo : Handle error here } err=AI_ContVScale (cardID, AD_B_1_V, InBuf, InVolBuf, ScanCount); if (err!=NoError) { //Error occurs !! //ToDo : Handle error here } for (i=0;i<ScanCount;i++) { dpDataOut[i]=InVolBuf[i]; } //Release_Card(cardID); return 0; } 各位老师，采用单独的不同通道，是否就是将下面的函数中的P9812_TRGSRC_CH1参数进行修改就行了： err=AI_9812_Config(cardID, P9812_TRGMOD_SOFT, P9812_TRGSRC_CH1, P9812_TRGSLP_POS, ClkSel, TriggerLevel, PostCount)。