Hi, maybe your terminal setting are wrong (baudrate, start/stop bit, line termination character, local echo) ?
Best regards, mcc deepak karki <[email protected]> [14-02-02 16:24]: > Hey! > I got a USB to serial adapter and tried getting text on screen, but I get > random symbols - like brackets, @, # and <?>. > I don't get whats wrong ( I followed this site > http://nullr0ute.com/2013/10/serial-console-options-on-the-beagle-bone-black/ > ) > > Also how would modifying the uEnv.txt on the SD card help? What will make > the BBB look for the SD card in the first place (Given that I'm not > pressing the boot button) > > regds, > Deepak > > > On Tue, Jan 28, 2014 at 8:33 PM, Robert Nelson <[email protected]>wrote: > > > On Tue, Jan 28, 2014 at 9:00 AM, deepak karki <[email protected]> wrote: > > > I'm posting after reading similar topics on this Google group, none of > > the > > > solutions worked. [also my problem is a bit different than the ones > > before, > > > I have been struggling for about a month to get my BBB working!] > > > > > > Here is the sequence of problems-failed solutions I have been through > > with > > > my board : > > > 1. About a month back I bought a BBB from a local retailer. Worked > > perfectly > > > for first two days, I was able to ssh, install pyBBIO etc. > > > 2. The next time I booted (tried to) my board, it failed. Only power > > button > > > was on, other LED's didn't even start blinking. I plugged out the power, > > > tried 5 minutes later, it worked! ssh-ed again and shut it down (sudo > > > shutdown 0) > > > 3. Next time while booting, I had the same problems, removing powering > > and > > > starting again did not help. > > > 4. I downloaded Arch Linux on a microSD card, put it into the BBB powered > > > the board holding the boot button, within half a minute I was able to SSH > > > again! Arch worked. > > > 5. I wasn't that happy with the Arch distribution, even though it > > worked. So > > > I got an Ubuntu image on my microSD. Tried booting the Black the same way > > > holding the boot button, but all that happened was all 4 LED's were on > > for > > > ~15 minutes [ I still don't know why this happens! ] Then the led's > > started > > > to blink, I was able to SSH. Sadly this happens every time I boot with > > > Ubuntu (via microSD). > > > 6. Later I thought I would re-flash Angstrom, and got the emmc-flasher > > image > > > on my microSD. Booted the board with the boot button pressed. According > > to > > > the manual the lights should have started flashing, and once the image is > > > written all 4 LED's should turn on > > > [http://derekmolloy.ie/write-a-new-image-to-the-beaglebone-black/ ]. > > But for > > > me all the 4 LED's were switched on from the power on stage, for ~5 min, > > > later they started to blink, but after 10 min or so, all 4 LED's abruptly > > > went off. (In the instructions it says that all 4 LED's will go on when > > > writing is complete) > > > 7. But anyway hoping that writing to the eMMC was complete, I booted the > > > board normally. USR0 switches on first followed by USR1, USR2. Then it > > > freezes here. I'm STUCK!! > > > > You could grab a usb-serial adapter and find out.. > > > > > What should I do now? > > > also a couple more questions : > > > - What does holding down the boot button do if the img in the SD card in > > not > > > a emmc-flasher? Does it just boot from the SD card or does it also get > > > written to emmc? > > > > Holding the button guarntees it'll try to load MLO/u-boot.img from the > > SD card first. > > > > > - Is there some setting by which I can boot via the SD card without > > having > > > to press the boot button every time and also not having to burn the > > image on > > > the emmc? > > > > A proper uEnv.txt in your sd card will guarntee it.. Otherwise just > > "dd if=/dev/zero of=/dev/mmcblk1" bootloader gone from eMMC... > > > > Regards, > > > > -- > > Robert Nelson > > http://www.rcn-ee.com/ > > > > -- > > For more options, visit http://beagleboard.org/discuss > > --- > > You received this message because you are subscribed to a topic in the > > Google Groups "BeagleBoard" group. > > To unsubscribe from this topic, visit > > https://groups.google.com/d/topic/beagleboard/rWx-pr5CFoc/unsubscribe. > > To unsubscribe from this group and all its topics, send an email to > > [email protected]. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > -- > 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]. > For more options, visit https://groups.google.com/groups/opt_out. -- 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]. For more options, visit https://groups.google.com/groups/opt_out.
