Re: I2C/IIC working on RPI4 8GB?
Emmanuel Vadot <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 29 Apr 2021 17:57:45 +0100 Mark Murray <[email protected]> wrote: > On 28 Apr 2021, at 22:07, Mark Murray <[email protected]> wrote: > > > > On 28 Apr 2021, at 09:19, Emmanuel Vadot <[email protected]> wrote: > > > >> According to this document is this just to detect that the slave hold > >> the scl line too long so I don't think that this is the problem here. > >> If you have a scope or a logic analyzer I suggest you start by using > >> it to confirm that when you scan with i2c -s you see something. > > > > As it turns out, my logic analyser arrived today. > > I got an oscilloscope onto pins 3 and 5 (GPIO2 and GPIO3), and "i2c -s" does not a jot on them. And this is with the i2cX.dtbo right ? Can you share the full dmesg please ? > I don't know if this helps, but the gpioctl utility thinks the pins are both inputs: I don't remember if the gpio/pinctrl controller in RPI still sees the pins when they are configured to an alt function or not but that does seems a bit strange yes. Please share a full dmesg as I want to confirm that the pins are configured for i2c function. > [root@grasshopper ~]# 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<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 03: 1 pin 3<IN>, 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> > pin 06: 1 pin 6<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 07: 0 pin 7<OUT>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 08: 0 pin 8<OUT>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 09: 0 pin 9<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 10: 0 pin 10<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 11: 0 pin 11<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 12: 0 pin 12<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 13: 0 pin 13<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 14: 1 pin 14<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 15: 1 pin 15<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 16: 0 pin 16<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 17: 0 pin 17<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 18: 0 pin 18<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 19: 0 pin 19<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 20: 0 pin 20<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 21: 0 pin 21<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 22: 0 pin 22<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 23: 0 pin 23<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 24: 0 pin 24<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 25: 0 pin 25<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 26: 0 pin 26<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 27: 0 pin 27<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 28: 1 pin 28<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 29: 0 pin 29<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 30: 1 pin 30<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 31: 1 pin 31<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 32: 0 pin 32<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 33: 0 pin 33<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 34: 1 pin 34<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 35: 1 pin 35<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 36: 1 pin 36<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 37: 1 pin 37<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 38: 1 pin 38<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 39: 1 pin 39<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 40: 0 pin 40<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 41: 0 pin 41<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 42: 0 pin 42<OUT>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 43: 1 pin 43<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 44: 1 pin 44<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 45: 1 pin 45<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 46: 0 pin 46<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 47: 0 pin 47<IN>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 48: 0 pin 48<>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 49: 0 pin 49<PU>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 50: 0 pin 50<PU>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 51: 0 pin 51<PU>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 52: 0 pin 52<PU>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > pin 53: 0 pin 53<PU>, caps:<IN,OUT,PU,PD,INTRLL,INTRLH,INTRER,INTREF,INTREB> > > M > -- > Mark R V Murray > -- 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]"