I'm using a Linux box running kernel version 2.6.6 and comedi version 0.7.69. My PCI-6534 is recognized on bootup:
comedi: version 0.7.69 - David Schleef
Available NI device IDs: 0x12b0
and # comedi_config /dev/comedi0 ni_pcidio
produces the following fine-looking claims:
comedi0: nidio:<6>PCI: Found IRQ 5 for device 0000:00:0b.0
PCI: Sharing IRQ 5 with 0000:00:0f.0
MITE:0xe9101000 mapped to c880d000 DAQ:0xe9102000 mapped to c88b0000
pci-6534 rev=64
When I try using the dio command from the demo directory of the comedilib distribution, I do not see any bits being flipped on the 6534 connector. Similarly, the outp command produces no change (the connector pins are all setting at zero volts except the +5V pin, which is at the right potential) in the output bit. Unsurprisingly, regardless of the word I'm driving onto A0-D7 on the card connector, inp (also from the demo directory) returns a value of zero.
I went on to try writing my own piece of very simple code to see if I could get _any_ output from the card. The code follows:
#include /* for printf() */
#include
int subdev = 0; /* change this to your input subdevice */
int chan = 0; /* change this to your channel */
int result = 0;
unsigned int write_mask= 0xFFFFFFFF;
unsigned int i,temp;
unsigned int* bits;
int main(int argc,char *argv[])
{
comedi_t *it;
lsampl_t data;
//parse_options(argc, argv);
printf("Opening /dev/comedi0.");
it=comedi_open("/dev/comedi0");
printf(".");
if(!it)
{
printf("Error in opening /dev/comedi0.\n");
printf("Try running comedi_config /dev/comedi0 ni_pcidio\n");
comedi_perror("/dev/comedi0");
exit(0);
}
printf(".\n");
write_mask = 0xFFFFFFFF;
while(chan<32)
{
printf(".");
result = comedi_dio_config(it,subdev,chan,COMEDI_OUTPUT);
printf("comedi_dio_config(chan=%d) returns %d\n", chan, result);
chan = chan + 1;
}
chan = 0;
while(i< 500)
{
i = i+1;
temp = 0xFFFFFFFF;
bits = &temp;
result = comedi_dio_bitfield(it, subdev, write_mask, bits);
printf(".");
usleep(1000);
if(result == -1){
printf("Error in testing 1\n");
comedi_close(it);
exit(-1);
}
}
comedi_close(it);
return 0;
}
This code runs just fine (no errors in software), but itdoes not produce anything but zero volts on A0-D7 pins.
So, I see no signs of functionality
Lastly, the comedi info command returns values that seem to be in line with the card being functional:
holloway@MACHINE:~/comedi/demo$ ./info -v
overall info:
version code: 0x000745
driver name: ni_pcidio
board name: pci-6534
number of subdevices: 1
subdevice 0:
type: 5 (digital I/O)
number of channels: 32
max data value: 1
ranges:
all chans: [0,5]
command:
start: now|int
scan_begin: timer|ext
convert: now
scan_end: count
stop: none|count
command fast 1chan:
start: now 0
scan_begin: timer 50
convert: now 0
scan_end: count 1
stop: count 2
I hope I'm just missing something simple here. Am I? Any ideas would be very appreciated.
I could move to the NI-distributed Windows software, but I'm building a custom embedded system, and it would be very beneficial for me to be able to run a UNIX-variant.
Thanks,
Jack
