bool VISAInstrument::Initialize()
{
char desc[256];
char error_desc[512];
//check visa system status
if(!VISASystemManager::Status()){
fErrorCode="Can't Initialize VISA system";
fStatus=VI_STATE_UNKNOWN;
return false;
}
//find exactly the unique specified instr,no findlist
int length=fRsrcName.size()+1;
char *rsrcname=new char[length];
fRsrcName.copy(rsrcname,length-1);
rsrcname[length-1]='\0';
fStatus = viFindRsrc(fDefaultRM,rsrcname,VI_NULL,VI_NULL,desc);
delete[] rsrcname;
if(fStatus < VI_SUCCESS){
viStatusDesc(fViSession,fStatus,error_desc);
fErrorCode=error_desc;
return false;
}
//viopen,default timeout 2s,default access mode
fStatus = viOpen(fDefaultRM,desc,fAccessMode,fOpenTimeout,&fViSession);
if(fStatus < VI_SUCCESS){
viStatusDesc(fViSession,fStatus,error_desc);
fErrorCode=error_desc;
return false;
}
//register this instrument
if(!VISASystemManager::GetInstance()->Register(this)){
fStatus=VI_STATE_UNKNOWN;
fErrorCode="Error! DeviceName Duplication.Please Choose Another DeviceName";
Close();
return false;
}
fRsrcDesc=desc;
return true;
}
int FindRSrc(char *instrDescriptor)
{
ViUInt32 numInstrs;
ViFindList findList;
ViStatus status;
ViSession defaultRM, instr;
status = viOpenDefaultRM(&defaultRM);
if ( status < VI_SUCCESS ) {
printf("Could not open a session to the VISA Resource Manager!");
return status;
}
status = viFindRsrc( defaultRM, "GPIB?*INSTR", &findList, &numInstrs, instrDescriptor );
if ( status < VI_SUCCESS ) {
printf("An error occurred while finding resources.");
return status;
}
if ( numInstrs > 0 ) {
printf("%s found!\n", instrDescriptor);//Agilent->ComboBox_GPIB->Items->Add(instrDescriptor);
}
viClose (defaultRM);
return 0;
//status = viOpen( defaultRM, instrDescriptor, VI_NULL, VI_NULL, &instr );
while ( --numInstrs ) {
status = viFindNext( findList, instrDescriptor );
if ( status < VI_SUCCESS ) {
printf("An error occurred finding the next resource.");
return status;
}
//这个时候的instrDescriptor就是你电脑上找到的资源，并且可用，如果为空就说明你的连线有问题
}
// viClose(instr);
viClose(findList);
return status;
}
