Yes its the trailing newline i think so echo -en "\xFF"
would work On Tue, Aug 28, 2012 at 7:39 PM, Tom Kuiper <kui...@jpl.nasa.gov> wrote: > ** > On 08/28/2012 10:22 AM, Adam Barta wrote: > > If you are running tcpborphserver2 on the roach then you can use the > following commands to write and read from registers through the tcp > interface on port 7147. > > ?wordwrite register-name word-offset payload > ?write register-name register-offset payload > ?wordread register-name word-offset length > ?bulkread register-name [register-offset [byte-count]] > > I'm familiar with that. Thanks. > > Is there a reason you would like to use the files? > > Generally speaking, the ROACH is on a private network and the controller > host is behind a firewall. Also, the network link can be pretty bad at > times. 100 kbps or even as low as 50 kbps. That could be because I'm at > home using DSL or because I'm using a Deep Space Network circuit at a time > when some huge higher-priority data transfer is in progress. I can really > cut down on the traffic is I use sshfs to mount the ROACH file system > locally. > > This seemed to work for me > root@192:/proc/389/hw/ioreg# cat sys_scratchpad | hd > 00000000 12 34 56 78 |.4Vx| > 00000004 > > root@192:/proc/389/hw/ioreg# echo -e \FF\FF > sys_scratchpad > root@192:/proc/389/hw/ioreg# cat sys_scratchpad | hd > 00000000 46 46 46 46 |FFFF| > 00000004 > > That works for me too. It tells me that the firmware is acting as it > should. Thanks for the tip. > > Hope this helps > > Note quite there yet, though. Notice that what was stored are ASCII > symbols. It isn't just because of a missing 'x': > > root@roach1:/proc/1174/hw/ioreg# echo -e \01\00 > trig_adc0 > root@roach1:/proc/1174/hw/ioreg# cat trig_adc0 | hd > 00000000 30 31 30 30 |0100| > 00000004 > root@roach1:/proc/1174/hw/ioreg# echo -e \x01\x00 > trig_adc0 > root@roach1:/proc/1174/hw/ioreg# cat trig_adc0 | hd > 00000000 78 30 31 78 |x01x| > 00000004 > > But this hangs: > root@roach1:/proc/1174/hw/ioreg# echo -e \\x01\\x00 > trig_adc0 > > Regards > > Tom > > > -- *Adam Barta* c: +27 72 105 8611 e: a...@ska.ac.za w: www.ska.ac.za
