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

Hi,

> Am 21.09.2023 um 14:10 schrieb Patrick M. Hausen <pmh@hausen.com>:
> 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.

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