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/* ************************* MessInst ************************** */
void MessInst::SendMessage(const char *message) {
unsigned long ActualLen;
char Buf[BUFLEN+1];
strcpy(Buf,message);
strcat(Buf,"\n");
iwrite(Inst,Buf,strlen(Buf),0,&ActualLen);
}
char *MessInst::ReceiveMessage(char *message, int maxLen) {
int Reason;
unsigned long ActualLen;
char *SPtr, Buf[BUFLEN+1];
iread(Inst,message,maxLen,&Reason,&ActualLen);
message[ActualLen] = ’\0’;
SPtr = message + strlen(message) - 1;
while (SPtr >= message && *SPtr == ’\n’)
*SPtr-- = ’\0’;
while (Reason == I_TERM_MAXCNT)
iread(Inst,Buf,BUFLEN,&Reason,&ActualLen);
return message;
}
char *MessInst::GetErrorMessage(char *message, int maxLen) {
char *MPtr;
SendMessage("SYST:ERR?");
ReceiveMessage(message,maxLen);
MPtr = (atoi(message)) ? message : NULL;
return MPtr;
}
Chapter 2 Usin
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