I created an issue, hope I got the description right:
https://github.com/machinekit/machinekit/issues/1481


On Mon, 20 May 2019 14:39:49 -0700
markus <mar...@bibi.ca> wrote:

> Yay - that does work, it is required to specify the board though:
> 
> markus@pocketbeagle:~/machinekit/configs/infinity$ halrun 
> msgd:0 stopped
> rtapi:0 stopped
> rtapi_msgd command:  /usr/libexec/linuxcnc/rtapi_msgd --instance=0
> --rtmsglevel=1 --usrmsglevel=1 --halsize=524288 rtapi_app
> command:  /usr/libexec/linuxcnc/rtapi_app_rt-preempt --instance=0
> halcmd: loadrt hal_bb_gpio  output_pins=201 <stdin>:1: insmod failed,
> returned -1: rtapi_app_main(hal_bb_gpio): -1 Operation not permitted
> 
> halcmd: loadrt hal_bb_gpio board=PocketBeagle output_pins=201
> halcmd: 
> 
> 
> 
> 
> On Mon, 20 May 2019 16:24:59 -0500
> Charles Steinkuehler <char...@steinkuehler.net> wrote:
>  
> > Hmm...looking at the code it appears the output pins have a
> > conditional for the pin numbering fixup:
> > 
> > https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/hal_bb_gpio/hal_bb_gpio.c#L365-L370
> > 
> > ...that's missing for the input pins:
> > 
> > https://github.com/machinekit/machinekit/blob/master/src/hal/drivers/hal_bb_gpio/hal_bb_gpio.c#L272-L275
> > 
> > Combined with the legacy use of 1xx and 2xx for the BeagleBone pin
> > numbers (which is why the fixup exists in the first place) it looks
> > like that's breaking you pin numbering scheme.
> > 
> > Can you try with just output pins and see if that works?
> > 
> > 
> > On 5/20/2019 4:06 PM, markus wrote:  
> > > That actually is the problem - the driver takes the p1 and p2 pins
> > > and uses them as p8 and p9 pins, this is the excerpt from the hal
> > > file that I used:
> > > 
> > > # load low-level drivers
> > > loadrt hal_bb_gpio board=PocketBeagle input_pins=201,202,203,204
> > > output_pins=217,227,228,229,230,231,232 loadrt [PRUCONF](DRIVER)
> > > prucode=$(HAL_RTMOD_DIR)/[PRUCONF](PRUBIN) [PRUCONF](CONFIG)
> > > 
> > > Same thing happens if I do it manually with halrun - and it
> > > complains about the first pin in the command line, so if I remove
> > > 201 it complains about 902 not being valid.
> > > 
> > > 
> > > On Mon, 20 May 2019 15:55:37 -0500
> > > Charles Steinkuehler <char...@steinkuehler.net> wrote:
> > >     
> > >> On 5/20/2019 3:36 PM, markus wrote:    
> > >>> Thanks for the clarification - much appreciated.
> > >>>
> > >>> It seems the driver is ignoring the parameter though. And I get
> > >>> the same result. From linuxcnc.log:      
> > >>
> > >> Look closer, it's not the same result.
> > >>    
> > >>> May 20 00:07:37 pocketbeagle msgd:0: startup pid=1376
> > >>> flavor=rt-preempt rtlevel=1 usrlevel=1 halsize=524288 shm=Posix
> > >>> cc=gcc 6.3.0 20170516  version=v0.1~-----~355496b May 20
> > >>> 00:07:37 pocketbeagle msgd:0: ØMQ=4.2.1 czmq=4.0.2
> > >>> protobuf=3.0.0 atomics=gcc intrinsics    libwebsockets=2.0.3
> > >>> May 20 00:07:37 pocketbeagle msgd:0: configured: sha=355496b
> > >>> May 20 00:07:37 pocketbeagle msgd:0: built:      Mar 14 2019
> > >>> 10:47:55 sha=355496b May 20 00:07:37 pocketbeagle msgd:0:
> > >>> register_stuff: actual hostname as announced by
> > >>> avahi='pocketbeagle.local' May 20 00:07:37 pocketbeagle msgd:0:
> > >>> zeroconf: registering: 'Log service on pocketbeagle.local pid
> > >>> 1376' May 20 00:07:38 pocketbeagle msgd:0: zeroconf: registered
> > >>> 'Log service on pocketbeagle.local pid 1376' _machinekit._tcp
> > >>> 49152 TXT "uuid=4e7e123c-1726-4351-bdfc-eba93047fb35"
> > >>> "instance=f2ce6258-7acd-11e9-aea4-606405e00475" "service=log"
> > >>> "dsn=tcp://pocketbeagle.local:49152" May 20 00:07:39
> > >>> pocketbeagle rtapi:0: 1:rtapi_app:1381:user hal_bb_gpio: ERROR:
> > >>> invalid pin number '901'.  Valid pins are 101-136 and
> > >>> 201-236.      
> > >>
> > >> The P8/P9 headers do not exist on the PocketBone.  Try using
> > >> legal pin numbers: 101-136 and 201-236
> > >>    
> > >     
> > 
> >   
> 

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