NI-PCI-6534, read and write failures.

The system stats: I'm running Linux 2.6.6 with comedi version 0.7.69. I've
got an NI-PCI-6534 DAQ card, which comedi detects nicely:

comedi: version 0.7.69 - David Schleef <ds_at_schleef.org>
Available NI device IDs: 0x12b0
comedi0: nidio:<6>PCI: Found IRQ 12 for device 0000:00:0c.0
PCI: Sharing IRQ 12 with 0000:00:09.0
MITE:0xe9101000 mapped to c880d000 DAQ:0xe9102000 mapped to c88b0000
 pci-6534 rev=64

For additional verbosity, the info executable from the comedilib
distribution's demo directory provides me with the following information:

holloway_at_RSEG-RECV:~/comedi/demo$ ./info 
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

So everything looks fine there...

My problem is this: it seems as though I can't read or write bits to the
device. I've written my own simple code using comedi_dio_bitfield(), I've
tried using the comedilib demos, inp, and outp. 

As far as reading bit, I've manually connected A0 (so bit 0) high, tried to
read the bit, and found that comedi's claiming it's 0.

# ./inp -v
measuring device=/dev/comedi0 subdevice=0 channel=0 range=0 analog reference=0
0

The same happens when I used comedi_dio_bitfield().  I've tried writting
bits using outp 

# ./outp -v 1
writing 1 to device=/dev/comedi0 subdevice=0 channel=0 range=0 analog reference=0
1

and my own code, only to find that I've got 0 on all the
bits (I'm watching the bits on a logic anlyzer).

Any ideas?

Has anyone been able to get simple DIO working on the NI-PCI-6534?

-Jack

-- 
Jack W. Holloway				holloway_at_mit.edu
Remote Sensing and Estimation Group		
MIT Research Laboratory of Electronics
77 Massachusetts Ave., Room 26-344		617.253.3o74
Cambridge, MA o2139

3o5 Memorial Drive, Apt 6o8a			617.225.9868
Cambridge, MA o2139

Received on 2005-01-25Z17:49:50