Thank you, Robert, for the tips and files.  Still not having luck with 
enabling the uart3_txd.  With the github file, linked above, does that have 
to be put in a special place and does it need compiled?  Also, can the 
other uarts be enabled along with the uart3_txd?  Normally, I include this 
"cape_enable=capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,BB-UART5" in 
my uEnv.txt file so I can enable those uarts.  I have tried issuing adding 
the line you sent me, "cape_enable=bone_capemgr.enable_partno=BB-UART3", 
both with and without my normal line and still not seeing the 
uart3_txd(ttyO3) listed in device list.

I appreciate your help with this matter.

Regards,

Mike

On Wednesday, May 11, 2016 at 1:53:09 PM UTC-4, RobertCNelson wrote:
>
>
>
> On Wed, May 11, 2016 at 12:50 PM, Michael Williams <[email protected] 
> <javascript:>> wrote:
>
>> Thank you for your input.  You cannot enable uart3_txd?
>>
>
> Sure you can enable that one:
>
>
> https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/BB-UART3-00A0.dts
>
> Just add:
>
> cape_enable=bone_capemgr.enable_partno=BB-UART3
>
> to /boot/uEnv.txt
>
> Regards,
>
> -- 
> Robert Nelson
> https://rcn-ee.com/
>

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