Ok, thanks !
On Monday, September 14, 2020 at 5:12:23 PM UTC+2, Dennis Bieber wrote:
>
> On Mon, 14 Sep 2020 06:15:25 -0700 (PDT), in
> gmane.comp.hardware.beagleboard.user Pavel Yermolenko
> <py.ohayo-fowrgoyegzlydzi6cay...@public.gmane.org <javascript:>> wrote:
>
> >I was a little hasty to say what works.
> >The version of *config-pin*, installed on my system, is quite shrinked.
> >
>
> The older config-pin is, as I recall, a shell script. The current
> config-pin is a compiled executable.
>
> debian@beaglebone:~$ which config-pin
> /usr/bin/config-pin
> debian@beaglebone:~$ sudo find / -iname "config-pin*"
> [sudo] password for debian:
> /opt/source/bb.org-overlays/tools/beaglebone-universal-io/config-pin
> /opt/source/bb.org-overlays/tools/pmunts_muntsos/config-pin.c
> /usr/bin/config-pin
>
>
> debian@beaglebone:~$
> /opt/source/bb.org-overlays/tools/beaglebone-universal-io/config-pin
> config-pin [-a] <pin> <mode>
> Set <pin> to <mode>, configuring pin multiplexing and optionally
> configuring the gpio. Valid <mode> strings vary based on <pin>,
> however all pins have a default and gpio mode. The default mode is
> the reset state of the pin, with the pin mux set to gpio, the pull
> up/down resistor set to it's reset value, and the pin receive buffer
> enabled. To setup gpio, the following <mode> strings are all valid:
>
> gpio :
> Set pinmux to gpio, existing direction and value unchanged
> in | input:
> Set pinmux to gpio and set gpio direction to input
> out | output :
> Set pinmux to gpio and set gpio direction to output
> hi | high | 1 :
> Set pinmux to gpio and set gpio direction to output driving
> high
> lo | low | 0 :
> Set pinmux to gpio and set gpio direction to output driving
> low
>
> To enable pull-up or pull-down resistors, a suffex may be appended to
> any of the above gpio modes. Use + or _pu to enable the pull-up
> resistor
> and - or _pd to enable the pull-down resistor. Examples:
>
> in+ | in_pu:
> Enable pull-up resistor and setup pin as per input, above.
> hi- | hi_pd:
> Enable pull-down resistor and setup pin as per high, above.
> While the pull-down resistor will be enabled, it will not do
> much
> until application software changes the pin direction to input.
>
> config-pin -l <pin>
> list valid <mode> values for <pin>
>
> config-pin -i <pin>
> show information to <pin>
>
> config-pin -q <pin>
> query pin and report configuration details
>
> config-pin -f [file]
> Read list of pin configurations from file, one per line
> Comments and white-space are allowed
> With no file, or when file is -, read standard input.
> config-pin -h
> Display this help text
>
> debian@beaglebone:~$ config-pin
>
> GPIO Pin Configurator
>
> Usage: config-pin -c <filename>
> config-pin -l <pin>
> config-pin -q <pin>
> config-pin <pin> <mode>
>
> debian@beaglebone:~$
>
> >Contrary to the version, described in the book of Derek Molloy, there is
> no
> >such options as *-a*, *-i*, *-f*,
>
> ANYTIME you are following a book and encounter a difference, you
> need
> to study which version of the OS was present at that time. Even the 2nd
> Edition of the book was likely behind a version or two by the time it was
> printed.
>
> Per page 32 of the book, it was written when Debian Stretch was
> still
> in use. Standard images have been Debian Buster since April of this year
> (though the config-pin change might have occurred anytime in 2019, or even
> late 2018, as the 2nd edition shipped [from Amazon] January 14 2019).
> Based
> on some screen captures, the book was using a February 2018 image, and the
> examples were run in April 2018. That's a whole 2.5 years ago.
>
> {Side note: Raspberry-Pi went to Buster in the summer of 2019, about two
> weeks before Debian Buster was officially released -- the R-Pi 4B was
> different enough that all the work to get it to run was done on
> pre-release
> Buster.}
>
>
>
> >Moreover, the -q option (pin querry) doesn't provide information of the
> pin
> >mode (direction) and its value:
> >
> >debian@beaglebone:~$ config-pin -q P9.12
> >
> >Current mode for P9_12 is: gpio
> >
> >debian@beaglebone:~$
> >
> >In fact, there is no information at all!
>
> debian@beaglebone:~$
> /opt/source/bb.org-overlays/tools/beaglebone-universal-io/config-pin -q
> P9.12
> P9_12 Mode: default Direction: in Value: 1
> debian@beaglebone:~$
>
>
> --
> Dennis L Bieber
>
>
--
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