My initial thought was the capacitors by the UART Groove connector as here:
https://groups.google.com/d/msg/beagleboard/BH-PUmjv6O4/_sYj5Av1BgAJ , but
upon inspection of BBG schematics
(https://raw.githubusercontent.com/SeeedDocument/BeagleBone_Green/master/resources/BEAGLEBONE_GREEN_V1.pdf
page 10) there should be no such capacitors. However it might still be
worth verifying.
This might also be a kernel thing - it seems the maintainers are not really
testing specific hardware in kernel versions closer to mainline, only
whether it generally runs. I've never tested 4.14.x but I had serious
issues even with 4.9.x and I've found 4.4.x to work the best. Unless your
board is somehow exposed to the internet, I'd stick with the older but
proven version.
With my solution I didn't use config-pin utility and relied on custom
device tree instead. It might be required to not only enable the pins but
also setup the bus itself. Note the big "&spi0 {}" block:
https://github.com/GroupOfRobots/RobotConfig/blob/master/DevTree/am335x-bonegreen-irys.dtsi
W dniu poniedziałek, 5 lutego 2018 22:12:30 UTC+1 użytkownik
j.ro...@gmail.com napisał:
>
> Hi,
>
> I'm currently facing problems with getting the SPI0 to work on my
> beaglebone green.
> I'm running debian 9.2 and kernel version 4.14.x
> The board is using uBoot and so i use config-pin to configure the pins:
> > config-pin p9.17 spi
> > config-pin p9.18 spi
> > config-pin p9.21 spi
> > config-pin p9.22 spi
>
> This gives no errors. But when i try to use the spidev1.0 or spidev1.1 i
> see no activity on the pins (i'm using a logic analyser to check)
>
> I really need to get the SPI0 to work, I'm even willing to not use
> the uboot if that solves the problem, but i have a feeling that that makes
> it even more complex.
>
> I hope you can help me. Thanks in advance.
>
> Op vrijdag 23 juni 2017 17:33:16 UTC+2 schreef mjbo...@gmail.com:
>>
>> Problem "solved" (worked around really) by switching to SPI0, changing
>> the pins around and rerouting most of our custom cape.
>> There are still some problems with the SPI bus but that's a separate
>> issue.
>>
>
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to beagleboard+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/beagleboard/8b93107e-b66d-4eca-b864-115ce2312381%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
