On 15/06/16 15:49, Bastian wrote:
Whilst we are waiting for the BBB gurus, I notice that
parallel-cape2.bbio still includes the hdmi cape overlay you
say is disabled
I assume that cape uses the pin you chose, are you actually
sure it is disabled?
Try commenting out the overlay line?
Yes, I tired and got some errors. I think the statement is
correct. If my understanding is correct, the overlay actually
enables the usage of the pins which are normally used by hmdi
as gpio pins.
In file 'base_bbb.hal' I added 846
to the input_pins.
Have you tried NOT exporting the pin and writing to it via
fd calls in /sys/class/gpio
I tried to not export the Pins (commented the lines in
rc.local). While starting AXIS, I got 4 warnings that the pins
are not exported and direction/value cannot be set. HAL Meter
shows still the wrong value.
What are fd calls?
My terminology may be incorrect, file descriptor - using read and
write operations to psuedo files to address memory locations
The other suggestion is to set DEBUG = to a high number (
at least 5) run and then look at /var/log/linuxcnc.log
The hal_bb_gpio driver has numerous debug error prints -
you may catch something there
I changed the value for DEBUG to 0x7FFFFFFF
and looked into the log file. There is a memory allocation
problem right at the beginning, because maximum memory
allocation is set to 64 KiB.
You can increase that within /etc/security/limits.d/machinekit.conf
Try inserting something like the attached file
Beside this I cannot identify anything
unusual. I attached the log if you are interested in it.
Looks like the pin is created OK
```
Mar 16 08:38:38 sandybox msgd:0: hal_lib:6488:rt hal_pin_new:121
HAL: creating pin 'bb_gpio.p8.in-46'
Mar 16 08:38:38 sandybox msgd:0: hal_lib:6488:rt hal_pin_new:121
HAL: creating pin 'bb_gpio.p8.in-46.invert'
Mar 16 08:38:38 sandybox msgd:0: hal_lib:6488:rt pin 46 maps to pin
2-7, mode 85
```
I don't use BBB, so have nothing I can test further with, have to
leave you to the 'experts'
regards
--
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|
# /etc/security/limits.conf.d/machinekit.conf
#
#<domain> <type> <item> <value>
# Default 64 not big enough for Machinekit
* - memlock 32768
root - memlock 32768
# Taken from RedHat's rt-setup package
* soft cpu unlimited
* - rtprio 99
* - nice -20
# End of file
