Robert,

I didn’t get what bugging u-boot had to do with anything at first. However, I 
reread you post and then I understood.

> On Aug 30, 2018, at 11:33 AM, Robert Nelson <[email protected]> wrote:
> What pins do the Xylotex use?
> 
        P8.07   out     # gpio2.2       Enable System
        P8.10   in      # gpio2.4       XLIM
        P8.11   out     # gpio1.13      X_Dir
        P8.12   out     # gpio1.12      X_Step
        P8.13   out     # gpio0.23      PWM0/SPINDLE
        P8.14   in      # gpio0.26      YLIM
        P8.15   out     # gpio1.15      Y_Dir
        P8.16   out     # gpio1.14      Y_Step
        P8.18   in      # gpio2.1       ZLIM
        P8.19   out     # gpio0.22      PWM1
        P9.14   out     # gpio1.18      PWM2
        P9.15   out     # gpio1.16      Z_Step
        P9.23   out     # gpio1.17      Z_Dir
#       P9.17   out     # gpio0.5       SCS
#       P9.18   in      # gpio0.4       SDI
#       P9.21   out     # gpio0.3       SDO
#       P9.22   out     # gpio0.2       SCK
        P9.13   out     # gpio0.30      A_Dir
        P9.11   out     # gpio0.31      A_Step
        P8.09   in      # gpio2.5       STOPin
> Just remember to disable internal hardware devices you don't need
> (audio/hdmi/etc)...
> 
> https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Disable_on-board_devices
> 
> Regards,
> 
> --
> Robert Nelson
> https://rcn-ee.com/

-- 
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