[ Copied to [EMAIL PROTECTED] because of the bug reports ]
Nathan Catlow wrote:
> I am looking forward to some motorola L7089 <-> linux S5 IR action
I've made some progress, but so far, things don't look great. My
configuration:
- PC: i386 architecture, 2.3.18 kernel, Tekram IRmate 210.
- PDA: Psion S5, under EPOC (sigh), no aditional software installed.
- Phone: Motorola L7089
Getting IrDA to work with 2.3.18 was a bit of a nightmare. I've applied
the 2.3.16 patch. Then I ran into the following problems:
- trivial: net/irda/ircomm/Makefile adds ircomm_tty_ioctl.c to O_OBJS.
Should be .o
- tricky: net/irda/irlmp.c:irlmp_register_service calls get_random_bytes,
but drivers/char/random.c isn't initialized yet (kernel oopses with a
fairly nebulous stack trace). My ugly hack-around: call rand_initialize
in irlmp_register_service if not compiled as a module and remove the
original call to rand_initialize in drivers/char/mem.c. A cleaner
solution would probably involve deferring the calls to get_random_bytes
until they are really needed, i.e. when some user process starts using
IrDA. Since I had more problems (probably just configuration), I
eventually switched to using modules, assuming that's what's tested
better.
- nasty: had various crashes when removing modules or closing things. So
I eventually strictly followed this sequence:
reboot # very important step :-(
insmod irda; insmod irtty
insmod tekram # my IR dongle
irattach /dev/ttyS1 -d tekram # on ttyS1
insmod ircomm; insmod ircomm-tty
mknod /dev/irnine c 161 0 # largely undocumented feature (?)
# see also /proc/tty/drivers
irmanager -d 1
dip -t
port irnine
term
(BTW, irdadump-X11 is very nice.)
Communication among devices:
- PDA-PC: seems to work well, didn't test it a lot. Note that the Psion
doesn't seem to like to change partners in a Comm session. Works best
if I exit Comm and restart it; Port activate on/off seems to work
sometimes. irmanager is a lot more promiscuous.
- PDA-Phone: see each other; communication works, but is fragile. Also,
after a very short while, both parties get out of sync. Example:
Typed: Seen: Comment:
AT+CPBR=101,200 AT+CPBR=101,20 Last 0 missing; key didn't register ?
0 0 works, as expected ...
[Enter] 0 uh ??
[Enter] ERROR (sure, AT+CPBR=101,2000 is wrong)
etc.
I haven't made it to the point where a data call was set up properly
with the Psion (under EPOC) so far.
- PC-Phone: see each other; communication works, but is fragile. Data
calls drop after maybe a minute. Not sure why. At least no "out of
sync" problem.
Another interesting effect: my first few tests with the +CPBR command
with the Psion (read phone book) yielded the expected data (if I managed
to avoid the out of sync bug long enough). Later, any +CPBR either dropped
the IR connection or led to a phone reset (IR and radio dropped, but it
restarts itself, without asking for a PIN or such). Not quite sure what's
going on, could be a difference in the sequence of +C... commands.
- Werner
--
_________________________________________________________________________
/ Werner Almesberger, ICA, EPFL, CH [EMAIL PROTECTED] /
/_IN_R_131__Tel_+41_21_693_6621__Fax_+41_21_693_6610_____________________/
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