tandersson/rf-bitbanger

Simple tools for handling OOK (on-off-keyed) RF transmission/reception on ISM bands

rf-bitbanger's Issues

Document the hardware this runs on

Does this only run on the Raspberry Pi, or can it also run on OpenWrt based systems with GPIOs such as routers?

Error writing to RFBB device: Invalid argument

I can write to /dev/null and rfbb_cmd runs without problems, but writing to the rfbb device exits with an error. I don't know how to get more debug info from a kernel module, I'm running 3.2.27+ on Debian Wheezy.

pi@raspberrypi ~/rf-bitbanger/rfbb $ rfbb_cmd -d /dev/rfbb -i RFBB -p SARTANO -c 1111110000 -l 1 -v
SARTANO protocol selected
Channel: 1111110000, on_off: 1
Selected RFBB interface (RF Bitbanger)
Writing 200 pulse_space_items, (800 bytes) to /dev/rfbb
Error writing to RFBB device: Invalid argument

pi@raspberrypi ~/rf-bitbanger/rfbb $ uname -a
Linux raspberrypi 3.2.27+ #250 PREEMPT Thu Oct 18 19:03:02 BST 2012 armv6l GNU/Linux
pi@raspberrypi ~/rf-bitbanger/rfbb $

"make KERNELDIR=~/linux" gives error

Hi, the make command gives this error:

$ make KERNELDIR=~/linux
make -C /home/pi/linux M=/home/pi/AanUit/rfbb/rf-bitbanger/rfbb modules
make: *** /home/pi/linux: No such file or directory. Stop.
make: *** [default] Error 2

Should I have/create a full kernel source in ~/linux?

As a test, I unpacked a full kernel source in ~/linux-source/linux-source-3.2/ and tried that:

pi@raspberrypi /AanUit/rfbb/rf-bitbanger/rfbb $ make KERNELDIR=/linux-source/linux-source-3.2/
make -C /home/pi/linux-source/linux-source-3.2/ M=/home/pi/AanUit/rfbb/rf-bitbanger/rfbb modules
make[1]: Entering directory `/home/pi/linux-source/linux-source-3.2'

WARNING: Symbol version dump /home/pi/linux-source/linux-source-3.2/Module.symvers
is missing; modules will have no dependencies and modversions.

Building modules, stage 2.
MODPOST 1 modules
CC /home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.o
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:8:1: error: variable ‘__this_module’ has initializer but incomplete type
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:9:2: error: unknown field ‘name’ specified in initializer
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:9:2: warning: excess elements in struct initializer [enabled by default]
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:9:2: warning: (near initialization for ‘__this_module’) [enabled by default]
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:10:2: error: unknown field ‘init’ specified in initializer
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:10:2: warning: excess elements in struct initializer [enabled by default]
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:10:2: warning: (near initialization for ‘__this_module’) [enabled by default]
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:14:2: error: unknown field ‘arch’ specified in initializer
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:14:10: error: ‘MODULE_ARCH_INIT’ undeclared here (not in a function)
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:14:2: warning: excess elements in struct initializer [enabled by default]
/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.c:14:2: warning: (near initialization for ‘__this_module’) [enabled by default]
make[2]: *** [/home/pi/AanUit/rfbb/rf-bitbanger/rfbb/rfbb.mod.o] Error 1
make[1]: *** [modules] Error 2
make[1]: Leaving directory `/home/pi/linux-source/linux-source-3.2'
make: *** [default] Error 2
pi@raspberrypi ~/AanUit/rfbb/rf-bitbanger/rfbb $

Any tips how to get rfbb on my Raspi? Would a ready-to-install rfbb.o / rfbb.ko work, or does it need hooks in the kernel? Or even recompiling the whole kernel?

Thanks