BBB connection problems

[Michael Pound]

Hello,

I have a problem with connection to BBB. My friend gave me the board that was used before. Probably it has some software installed in the memory.

When for the first time I connected the BBB to USB the LED_Power diode flash for 1 s and the disappear, other LEDs are dark.

I tried to install the latest software on my sd card and flash with the latest software. First I install the software on my sd card, second, I put the sd card in the slot, third I pushed the BOOT button and then connect the USB, but after that, the LED_power diode flash only for 1 s and nothing happened. I read that i need to change the command line like here: "To turn these images into eMMC flasher images, edit the /boot/uEnv.txt file on the Linux partition on the microSD card and remove the '#' on the line with 'cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh'. Enabling this will cause booting the microSD card to flash the eMMC. Images are no longer provided here for this to avoid people accidentally overwriting their eMMC flash.". But I can't see the SD card when I plug it after installation of software to SD slot card in my notebook.

But later I installed this software: Debian 7.5 (BeagleBone Black - 2GB eMMC) 2014-05-14 for eMMC flashing. This time I can see the software image when I plug the sd card to notebook after the installation. But when I put the SD card to BBB and do the same sequence it happening the same. I see the only LED_power flash for 1s and nothing more.

Please help me with that situation.

[Dennis Lee Bieber]

On Mon, 12 Nov 2018 06:14:04 -0800 (PST), Michael Pound
<orzesz...@gmail.com> declaimed the
following:

>I tried to install the latest software on my sd card and flash with the
>latest software. First I install the software on my sd card, second, I put
>the sd card in the slot, third I pushed the BOOT button and then connect
>the USB, but after that, the LED_power diode flash only for 1 s and nothing
>happened. I read that i need to change the command line like here: "To turn
>these images into eMMC flasher images, edit the /boot/uEnv.txt file on the
>Linux partition on the microSD card and remove the '#' on the line with
>'cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh'. Enabling
>this will cause booting the microSD card to flash the eMMC. Images are no
>longer provided here for this to avoid people accidentally overwriting
>their eMMC flash.". But I can't see the SD card when I plug it after
>installation of software to SD slot card in my notebook.
>
>But later I installed this software: Debian 7.5 (BeagleBone Black - 2GB eMMC)
>2014-05-14

><https://debian.beagleboard.org/images/BBB-eMMC-flasher-debian-7.5-2014-05-14-2gb.img.xz>

>for eMMC flashing. This time I can see the software image when I plug the

No -- you are seeing a small FAT partition, most of the image is an
EXT3 partition. Newer images no longer use the FAT partition (they create a
virtual FAT partition once booted).

Windows does not handle EXT3 (or other Linux) partitions, hence once
the image is written to the SD card, it "disappears" from Windows.

>sd card to notebook after the installation. But when I put the SD card to
>BBB and do the same sequence it happening the same. I see the only
>LED_power flash for 1s and nothing more.
>
>Please help me with that situation.

Before worrying about flashing the eMMC, you need to get the device to
boot from the SD card itself.

However, the power LED flicker leads one to suspect the board is DEAD
-- the power control chip which controls part of the boot sequence is
shutting down the system when it detects something out-of-spec.

How are you attempting to power the board? 5V barrel jack with a wall
wart, or via USB connection (note that stock USB2 ports max out at 0.5A
unless marked as a high power/charging port) -- the BBB normally can
boot/run from USB power, but flashing should be done with a wall wart
supply of at least 1A.


--
Wulfraed Dennis Lee Bieber AF6VN
wlf...@ix.netcom.com HTTP://wlfraed.home.netcom.com/