Re: FreeBSD 14, RPI CM3+ - how to use I2C?

On Thu, 21 Sep 2023 15:09:45 +0200
"Patrick M. Hausen" <[email protected]> wrote:

> Hi,
> 
> > Am 21.09.2023 um 14:10 schrieb Patrick M. Hausen <[email protected]>:
> > dtoverlay=i2c1,pins_44_45
> > dtoverlay=i2c-rtc,mcp7940x
> > 
> > Source: https://docs.turingpi.com/docs/turing-pi1-cluster-management-bus-i2c
> > 
> > Did that, but
> > 
> > i2c -s
> > 
> > shows now output [...]
> 
> Turns out the FreeBSD installation does not come with all (?) overlays
> by default like e.g. Ubuntu.
> 
> I downloaded the two missing files from here:
> 
> https://github.com/raspberrypi/firmware
> 
> and placed them in /boot/efi/overlays.

 We don't install them all on the image but everything is packaged in
the rpi-firmware package.

> Bingo:
> 
> root@pi1:~ # i2c -s
> 57 5c
> root@pi1:~ # i2c -a 0x57 -o 0xf2 -d r -c 1
> ff
> 
> Now I finally understand what all of this weird stuff *is* - sort of ;-)
> 
> Kind regards,
> Patrick


-- 
Emmanuel Vadot <[email protected]> <[email protected]>