On Tue, Nov 22, 2016 at 10:47 AM, Dennis Lee Bieber <[email protected]> wrote: > On Tue, 22 Nov 2016 06:24:10 -0800 (PST), "'Ian Watts' via BeagleBoard" > <[email protected]> declaimed the > following: > > >>cycle simply results in the BBB 'hanging' with Usr LEDs 0 and 1 permanently >>ON and nothing else happening ! >> > LED-1 normally indicates SD card access, while -0 is a "heartbeat"... > If nothing has corrupted the normal pin configuration and thereby > preventing the back-ground tasks from activating... > > However... As I recall, a normal boot sequence is to light each LED in > sequence before it gets to the heartbeat stage. Does the unit get to the > all-on stage and THEN lock on 0&1, or is it only starting with 0, 1, and > never getting to 2 and 3? > > Unfortunately, I haven't seen any documentation for what each stage of > the LED sequence represents -- and can't find anything obvious that might > toggle them... May be built into the uboot image, or the various other > memory images that get loaded to start the system.
in u-boot: usr0 - 53 usr1 - 54 usr2 - 55 usr3 - 56 usr0 - turn on - on boot starting usr1 - turn on - starting scan of mmc0 (microSD) /uEnv.txt (boot) *default use for comparability with old images.. usr2 - turn on - found /uEnv.txt usr3 - turn on - running u-boot cmd: uenvcmd /boot.scr (for debian) usr2 - turn on - found /boot.scr usr3 - turn on - running u-boot cmd: bootscript /boot/boot.scr (for debian) usr2 - turn on - found /boot/boot.scr usr3 - turn on - running u-boot cmd: bootscript /boot/uEnv.txt *default set by "eMMC flasher" usr2 - turn on - found /boot/uEnv.txt usr3 - turn on - running u-boot cmd: uname_boot usr3 - turn off usr2 - turn off usr1 - turn off Starting Scan off mmc1 (eMMC) /uEnv.txt (boot) *default use for comparability with old images.. usr2 - turn on - found /uEnv.txt usr3 - turn on - running u-boot cmd: uenvcmd /boot.scr (for debian) usr2 - turn on - found /boot.scr usr3 - turn on - running u-boot cmd: bootscript /boot/boot.scr (for debian) usr2 - turn on - found /boot/boot.scr usr3 - turn on - running u-boot cmd: bootscript /boot/uEnv.txt *default set by "eMMC flasher" usr2 - turn on - found /boot/uEnv.txt usr3 - turn on - running u-boot cmd: uname_boot aka... it doesn't actually tell you much, unless it get's stuck.. Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAOCHtYhDHm2EojEgswgpr8Wfj49wrVRVTm-xKHcoZtgqxFHQkw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
