DAS08/JR - Comedi

 

26-6-2015

Sometimes it is necessary to have a look in my basement for spare parts.

This is what I found!

Complete, but dusty and dirty, hidden in the bottom of a paper box....

A das08-jr.  Incl. educational board.

Based on ISA. It must be around 15 years old.

 

On my Ubuntu 14.04 Laptop:

$ cd /lib/modules

$ find . -name *das08*

Yep...

Back to the basement..... I think I have some where an old Dell with a Pentium Pro processor with maybe an ISA slot.....

cio-das08-jr.pdf cio-LAB8-Term.pdf

Not sure yet if I want to spent time on this.

Let's say it's for sale as well.

Drop me a mail......

27-6-2015

Got him!

A Dell Optiplex GX PRO. What I can remember it was (is?) a very good machine.

 

I couple of days ago I have build deb-files for Proview 5.2.1-2 for Debian 8.

pwr, pwrtt and pwrsev....

edit: 6-7-2015

Lets try a Proview Process station, with Debian 8 before I even consider to get the das08 I/O card  working.

Starting with a small Debian 8 net-install.

Let's go....

6-7-2015

Nope...., I changed my mind....

Found this comedi based device just like the das08.

To be honest I completely forgot the comedi DAQ possibilities. This can be very interested for Proview. After a kernel update all comedi supported I/O-systems drivers doesn't need to become compiled again. For example the motioncontrol USB/IO which is supported in Proview, needs a 2.6 kernel to compile. Today a 3.x kernel took over. There has been a lot of  changes ain linux 3.x comparing to 2.6 . So, compiling a kernel module from 2.6 to 3.x has issues.... Not with "comedi" which is supported "inside" the kernel as modules.

This means, theoretically, this list of devices  should be able to work with Proview.

Be aware the are general limitations with Comedi drivers.

 

$ sudo apt-get install libcomedi-dev

Add the user pwrp to the "iocard" group

In the directory /usr/share/doc/libcomedi-dev/demo/ is example code.

$ ./board_info gives:

overall info:
  version code: 0x00074c
  driver name: usbdux
  board name: usbdux
  number of subdevices: 5
subdevice 0:
  type: 1 (analog input)
  flags: 0x00119000
  number of channels: 8
  max data value: 4095
  ranges:
    all chans: [-4.096,4.096] [-2.048,2.048] [0,4.096] [0,2.048]
  command:
    start: now|int
    scan_begin: timer
    convert: now
    scan_end: count
    stop: none|count
  command fast 1chan:
    start: now 0
    scan_begin: timer 125000
    convert: now 0
    scan_end: count 1
    stop: count 2
subdevice 1:
  type: 2 (analog output)
  flags: 0x00125000
  number of channels: 4
  max data value: 4095
  ranges:
    all chans: [-4.096,4.096] [0,4.096]
  command:
    start: now|int
    scan_begin: timer
    convert: now
    scan_end: count
    stop: none|count
  command fast 1chan:
    start: now 0
    scan_begin: timer 1000000
    convert: now 0
    scan_end: count 1
    stop: count 2
subdevice 2:
  type: 5 (digital I/O)
  flags: 0x00030000
  number of channels: 8
  max data value: 1
  ranges:
    all chans: [0,5]
  command:
    not supported
subdevice 3:
  type: 6 (counter)
  flags: 0x00030000
  number of channels: 4
  max data value: 65535
  ranges:
    all chans: [0,1]
  command:
    not supported
subdevice 4:
  type: 12 (pwm)
  flags: 0x00020100
  number of channels: 8
  max data value: 512
  ranges:
    all chans: [0,1]
  command:
    not supported


And in /dev/

ls -l comedi*

crw-rw---- 1 root iocard 98,  0 Jul  6 13:23 comedi0
crw-rw---- 1 root iocard 98, 48 Jul  6 13:23 comedi0_subd0
crw-rw---- 1 root iocard 98, 49 Jul  6 13:23 comedi0_subd1

Let's try to create a project in Proview named "comedi" and try to attach the I/O system to this project. In first case I want only to read  analogue  value 0 from subdevice 0.

I am using a default Ubuntu 14.04 with the standard pwr52_5.2.1-2_i386.deb file and set the environment in a terminal with:

$ source /usr/pwrp/adm/db/pwr_setup.sh

 

I have created a class volume and the next step is to write code for the methods.

Edukits