Re: Comms cape - missing overlay or workaround

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Jason Kridner

Jun 7, 2019, 3:25:45 PM6/7/19
to Todd Ojala,

On Fri, Jun 7, 2019 at 2:51 PM Todd Ojala <> wrote:


Hello there.


I’m rather new to the IoT and BeagleBone Black.

I’m really enjoying it. I am employed by SAFE Inc., and we make custom PCBs and microcontrollers. We use quite a few BeagleBone Blacks.


We recently acquired your Comms cape for a large project.

The Debian Linux distribution I am using (the one compiled for BB) sees the Comms cape, but the overlay for the cape seems to be missing: BBORG_COMMS

Here’s the output from dmesg:


debian@beaglebone:/lib/firmware$ dmesg | grep bone

[    1.380819] bone_capemgr bone_capemgr: Baseboard: 'A335BNLT,00C0,4218BBBK260C'

[    1.380849] bone_capemgr bone_capemgr: compatible-baseboard=ti,beaglebone-black - #slots=4

[    1.408504] bone_capemgr bone_capemgr: slot #0: No cape found

[    1.435440] bone_capemgr bone_capemgr: slot #1: No cape found

[    1.460071] bone_capemgr bone_capemgr: slot #2: 'Industrial Comms Cape,00A2,,BBORG_COMMS'

[    1.488731] bone_capemgr bone_capemgr: slot #3: No cape found

[    1.489015] bone_capemgr bone_capemgr: initialized OK.

[    1.493924] bone_capemgr bone_capemgr: loader: failed to load slot-2 BBORG_COMMS:00A2 (prio 0)

[    5.897999] systemd[1]: Set hostname to <beaglebone>.



I am wondering if there is or will be an overlay for this board, of if there is an alternative way to enable UART4 for this cape? Currently, when I try to use or enable it with Adafruit in Python, it is just not available.

Sorry about that. Validation happened using individual overlays. I'll push an update to shortly.

For the RS485, just using the already loaded UART driver is fine:

sudo config-pin p9.11 uart
sudo config-pin p9.13 uart
Then, set your baud, etc. via 'stty' with /dev/ttyS4.

For the CAN, I think we used BB-CAN1-00A0.dts configured via /boot/uEnv.txt, ie:

It might have been possible with config-pin, but I'm not sure.

Again, sorry I dropped the ball on submitting the overlay. I should be able to have it pushed by Monday afternoon and Robert should be able to have it in the repo by Wednesday.

-- - a 501c3 non-profit educating around open hardware computing

Todd Ojala

Jun 7, 2019, 4:07:15 PM6/7/19
to Jason Kridner,


Wow. That’s amazingly fast answers and communication!

I really appreciate it.


I’m really getting into this new career of mine in IoT stuff.

You do great work.




Todd Ojala

m: 612.804.3407

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