Segmentation Fault on comedi_sv_measure

• From: Russell Poyner <rpoyner_at_wisc.edu>
• Date: Wed, 05 Apr 2006 13:53:51 -0500

I am updating a program I wrote 6 years ago that gathers data through a 
Keithley-Metrabyte Das-16 card.  Things work ok using single acquistion 
functions.  When I attempt to use comedi_sv_measure i get segfault.  
comedi_sv_init works and seems to set sane values in the comedi_sv_t 
structure.  Is this a hardware limitation, or am I missing something?
code:

double *sv_data;
comedi_sv_t *sv;

if(comedi_sv_init(sv,it,AD_SUBDEV,ai_chan) < 0){
                fprintf(stderr,"Error in comedi_sv_init");
                comedi_perror("/dev/comedi0");
        }

ret=comedi_sv_measure(sv,sv_data);
fprintf(stderr,"measured %d points\n",ret);

Received on 2006-04-05Z17:53:51