The problem is that I tried looking for the pin-out diagram or
the pin-configuration of the SCB 68 connector block compatible with NI
PCI-6229 card but couldn't find it. I tried looking at the NI site but
ended up reading a lot of pdfs, all in vain.
Essentially I am trying to execute the first sample program from comedi
demo directory and it gives me random values between 0 to 65535
although I tried different values of subdevices and channel and
supplied a particular pin (digital I/O pin) with a high voltage during
this time. Now, I am sure that connector block and the card are in
working condition.
Can somebody of you, please help me out with this? I am in kind of urgent need of this information.
Specification:
Software:
Ubuntu 9.04 ext3
RTAI 3.7
comedi 0.7.76
code I tried executing::
#include <stdio.h> /* for printf() */
#include <comedilib.h>
int subdev = 0; /* change this to your input subdevice */
int chan = 0; /* change this to your channel */
int range = 0; /* more on this later */
int aref = AREF_GROUND; /* more on this later */
int main(int argc,char *argv[]){
comedi_t *it;
lsampl_t data;
it=comedi_open("/dev/comedi0");
comedi_data_read(it,subdev,chan,range,aref, & data);
printf("%d\n",data);
return 0;
}
One more thing, I arranged the switches in the connector block as per
mentioned viz. S3, S1 and S2 not in their default (factory)
configuration and grounded pin 12 and supplied a high(5 V) on the pin
11.
Can you tell me the correct values of channel and sub-device for this pin layout. I am trying Digital input/output.
Moreover, where do I look for the pin configuration.
Regards,
