Re: I2C/IIC working on RPI4 8GB?
Emmanuel Vadot <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On Sun, 25 Apr 2021 13:32:00 +0100 Mark Murray <[email protected]> wrote: > Hi All, > > Does anyone here have IIC/I2C working on a CURRENT (I'm running latest) FreeBSD? > > I've never seen it work; Last time I had working IIC was on an RPI3. > > There is a /dev/iic0, and I have a known working RTC on it, but the scan just times out: > > [root@grasshopper ~]# i2c -s > Hardware may not support START/STOP scanning; trying less-reliable read method. > <TIMEOUT> > Scanning I2C devices on /dev/iic0: <none found> > > > I suspect something not-quite-right in DTS land, but I lack the knowledge to investigate. I've done some random stumbling around in the dark with overlays and the like, but I've either seen the above error, or a total lack of /dev/iic0. > > Thanks! > > M > -- > Mark R V Murray > I2C is disabled by default. You need to copy i2c0.dtbo (or i2c1<X> I don't know which one maps to the pins you want to use) in the ESP partition and add "i2c<X>" to the dtoverlay line in config.txt -- Emmanuel Vadot <[email protected]> <[email protected]> _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-arm To unsubscribe, send any mail to "[email protected]"