Date: Sun, 2 May 2021 14:00:58 -0700 From: Mark Millard <marklmi@yahoo.com> To: Elwood Downey <elwood.downey@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: I2C/IIC working on RPI4 Message-ID: <31C7EFC2-E266-49D6-919D-73D07B54FF53@yahoo.com> In-Reply-To: <CAL98DL6UkRuGrLQPdJFxT77eK2RcHZyT52a389xkpfASH9mOXw@mail.gmail.com> References: <mailman.56.1619956801.75022.freebsd-arm@freebsd.org> <CAL98DL6UkRuGrLQPdJFxT77eK2RcHZyT52a389xkpfASH9mOXw@mail.gmail.com>
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On 2021-May-2, at 11:05, Elwood Downey <elwood.downey at gmail.com> = wrote: > I've been trying everything to get I2C working since I started using > freebsd on rpi a few years ago. With this change to config.txt, my = hamclock > <https://clearskyinstitute.com/ham/HamClock>; project can finally = access all > the I2C devices. Now that everything works I will also submit hamclock = as a > new package. Turns out this is controllable from FreeBSD's shells and programmatically: sysctl and its internal-call equivalents. (This basically repeats a note to Mark Murray.) For example of via sysctl usage from /bin/sh : # sysctl dev.gpio.0.pin.3.function dev.gpio.0.pin.2.function dev.gpio.0.pin.3.function: input dev.gpio.0.pin.2.function: input # sysctl dev.gpio.0.pin.3.function=3Dalt0 dev.gpio.0.pin.2.function=3Dalt0= dev.gpio.0.pin.3.function: input -> alt0 dev.gpio.0.pin.2.function: input -> alt0 # sysctl dev.gpio.0.pin.3.function dev.gpio.0.pin.2.function dev.gpio.0.pin.3.function: alt0 dev.gpio.0.pin.2.function: alt0 # gpioctl -f /dev/gpioc0 -l -v pin 00: 1 pin 0<IN>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> pin 01: 1 pin 1<IN>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> pin 02: 1 pin 2<>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> pin 03: 1 pin 3<>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> pin 04: 1 pin 4<IN>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> pin 05: 1 pin 5<IN>, = caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> . . . Such can be used to avoid folks needing to adjust the contents of the msdos file system that has the RPi* firmware ( and its config.txt ). =3D=3D=3D Mark Millard marklmi at yahoo.com ( dsl-only.net went away in early 2018-Mar)
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