On Mon, Dec 21, 2015 at 9:06 PM,  <[email protected]> wrote:
> I attempted to flash the eMMC image on a BeagleBone Black, but I've lost
> control of the device. At minimum, I lost SSH, HTTP and other network
> connectivity, and I suspect the device may be bricked.

Well, physical damage is the only way to brick this board..


> I'm now trying to decipher the User LED blink codes to understand the device
> state and where things may have gone wrong. The BeagleBone Black SRM
> (http://www.adafruit.com/datasheets/BBB_SRM.pdf) has a section on User LEDs
> (Section 6.6, page 56), but it does not offer the blink codes.
>
> Where are the User LED blink codes provided or documented?

The only real LED blink code is on bootup, a solid pattern

[] [] [] [] - off
[x] [] [] [] - on, starting mmc scan...
[x] [x] [] [] - scanning mmc...
[x] [x] [x] [] - processed boot script...
[x] [x] [x] [x] - jumping into boot...

Beyond that, the "flasher" does a cyclon pattern...

Otherwise the led's are just software triggers in linux controlled by gpio:

usr0: heartbeat
usr1: mmc0
usr2: cpu0
usr3: mmc1

If they stop, the core stopped..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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