Hi
you should change configuration of pins from HDMI to SPI
type this command in terminal: sudo nano /boot/uEnv.txt
then you should remove # of disable-uboot-overlay-video=1
then you can use from SPI pins

On Tuesday, January 24, 2017 at 4:12:30 PM UTC+3:30, Lindo wrote:
>
> Hi,
>
> I'm trying to use cdsteinkuehler's beaglebone-universal-io 
> <https://github.com/cdsteinkuehler/beaglebone-universal-io> to config 
> P9_28-31 as spi interface. After loading cape-universal overlay first, I 
> got the "P9_28 pinmux file not found!" message when I configure P9_28 pin
>
> config-pin P9.28 spi
> P9_28 pinmux file not found!
> cape-universala overlay not found
> run "config-pin overlay cape-universala" to load the cape
>
>
> I think P9.28 might not actually exported, and then I found that the 
> cape-univeral-00A0.dts file on the github website is different with 
> RobertCNelson's version(I found this file under 
> /opt/source/bb.org-overlays/src/arm/). see detail here: 
> https://www.diffchecker.com/BivnZllE
>
> Is this a bug? or I was doing wrong somewhere? 
>
> Thanks!
> Lindo
>
>

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