On 08/28/2012 10:53 AM, Adam Barta wrote:
I think the quotes are important too " "
There's still something funny going on. Look at the file size for
sys_scratchpad after writing.
Tom
root@roach1:/proc/1221/hw/ioreg# ls -l
total 0
-r--r--r-- 1 root root 4 Jul 28 02:13 acc_cnt
...
-rw-rw-rw- 1 root root 4 Jul 28 02:13 sys_scratchpad
-rw-rw-rw- 1 root root 4 Jul 28 02:13 trig_adc0
root@roach1:/proc/1221/hw/ioreg# echo -en "\xFF\xFF\xFF\xFF" >
sys_scratchpad
root@roach1:/proc/1221/hw/ioreg# cat sys_scratchpad | hd
00000000 ff ff ff ff |....|
00000004
root@roach1:/proc/1221/hw/ioreg# ls -l
total 0
-r--r--r-- 1 root root 4 Jul 28 02:13 acc_cnt
...
-rw-rw-rw- 1 root root 0 Jul 28 02:21 sys_scratchpad
-rw-rw-rw- 1 root root 4 Jul 28 02:13 trig_adc0
On Tue, Aug 28, 2012 at 7:48 PM, Tom Kuiper <kui...@jpl.nasa.gov
<mailto:kui...@jpl.nasa.gov>> wrote:
On 08/28/2012 10:45 AM, Adam Barta wrote:
Yes its the trailing newline i think so
echo -en "\xFF"
would work
Yes, thanks for the -n tip. Here's what I get.
root@roach1:/proc/1174/hw/ioreg# echo -en \x01\x00 > trig_adc0
root@roach1:/proc/1174/hw/ioreg# cat trig_adc0 | hd
00000000 78 30 31 78 |x01x|
00000004
root@roach1:/proc/1174/hw/ioreg# echo -en \xff\xff > trig_adc0
root@roach1:/proc/1174/hw/ioreg# cat trig_adc0 | hd
00000000 78 66 66 78 |xffx|
00000004
root@roach1:/proc/1174/hw/ioreg# echo -en \xFF\xFF > trig_adc0
root@roach1:/proc/1174/hw/ioreg# cat trig_adc0 | hd
00000000 78 46 46 78 |xFFx|
00000004
Since this is on a ROACH-1 PPC we should be running the same OS,
so I'm puzzled.
Tom
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