GPIB and K1944A

Question

Hi,
I'm actually using a GPIB and a voltmeter ( KETHELEY). I generate a signal (sine for instance) thanks to a frequency generator and I want to acquire it with the voltmeter and send measures through the GPIB to plot them on a graph.
I want to give you an extract of the code where I have troubles to understand :
short k1944a_device (void) { return bd; }
short k1944a_ready (void)
short i;
do { ibwait (bd, 0x4800); ibrsp (bd, &sp); i++; }
while ((!(sp & 16))&&(i<10));
if (i==10)
MessagePopup ("", "Le volmËtre ne rÈpond plus");
return 0;
return 1;
short k1944a_ecrire (char *texte)
short ok;
ibwrt (bd, texte,(long)strlen(texte));
ok=k1944a_ready ();
if (ok==0) return 0;
return 1;
 When I run the code and click and the button acquire the programm freezes and I can read in RUN TIME window the following error:
NON-FATAL RUN-TIME ERROR : "K1944lab.c",line38,col5,trhead id 0x0000234: Function ibwrt(iberr == 6(0x6)) 
Moreover, when I try to run the code I get this message : NON-FATAL RUN-TIME ERROR..... Local 'i' was referenced before being initialized. Should I absolutely initialize it? 

Answer 1

Hi,
Thanks for posting on NI Forum.
You can find at this link a possible solution to your problem.
Best regards,
Nicolas M.
National Instruments France
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