> > *Hi William,* > > *Thanks for your reply. I'm trying to flash bbb now. Could I ask what's the difference between flashing an image vs flashing the eMMC? I thought flashing the bbb meant flashing everything. *
Flashing the eMMC is flashing everything. *I do not currently have anything that I want to keep on bbb. What's the > difference between booting from an nfs share vs booting normally? * > > *Also, what do you suggest I do in the future? I didn't follow the blog > guy's advice and had simply added the line, although I did change the file > name from nfs-uEnv.txt to uEnv.txt. Should I leave the file name as > nfs-uEnv.txt next time?* > > *Thanks.* > Don't bother with NFS shares for now. They're fairly complicated, and quite honestly you do not sound like you're experienced enough with linux yet. But the difference is, NFS boot is "booting" over a network. Or if you prefer it is loading the root file system over a network. In the future you should make a backup of any important files, or those you're not sure of. On Sat, Feb 20, 2016 at 10:44 PM, Audrey <[email protected]> wrote: > Hi William, > > Thanks for your reply. I'm trying to flash bbb now. Could I ask what's the > difference between flashing an image vs flashing the eMMC? I thought > flashing the bbb meant flashing everything. > > I do not currently have anything that I want to keep on bbb. What's the > difference between booting from an nfs share vs booting normally? > > Also, what do you suggest I do in the future? I didn't follow the blog > guy's advice and had simply added the line, although I did change the file > name from nfs-uEnv.txt to uEnv.txt. Should I leave the file name as > nfs-uEnv.txt next time? > > Thanks. > > On Friday, February 19, 2016 at 7:04:16 PM UTC-5, William Hermans wrote: >> >> *After that, I changed the name of the file from nfs-uEnv.txt to just >>> uEnv.txt and rebooted bbb by typing reboot on the terminal, and now I don't >>> think bbb works.* >>> >> >> Ok, I missed this part originally. Yes, you're attempting to boot from an >> nfs share, so unless you have an nfs share, setup exactly like how is >> implied in the uEnv,txt file. Changing nfs-uEnv.txt to uEnv.txt without >> modification will fail. >> >> On Fri, Feb 19, 2016 at 4:59 PM, William Hermans <[email protected]> >> wrote: >> >>> *Delete any lines that may appear in uEnv.txt and add the following and >>>> save. This change will tell the board to apply the SPI0 Device Tree >>>> Overlay we created on startup.* >>>> >>> >>> The above is very, very bad advice. The uEnv.txt is a very important >>> file for booting the beaglebone black( or any beagle hardware ), and >>> arbitrarily deleting lines from, or the whole file is not very smart at >>> all. I would suggest in the future to avoid any advice, guide, or whatever >>> from that blog site. >>> >>> So, if you board is now in an unbootable state, you're options are >>> rather limited. In either case, you will need an sdcard, with either a >>> standalone, or flashing image on it. Then boot from that. With a standalone >>> image, you'll have to reinstate the uEnv.txt file back to the original >>> contents before you followed that bad advice from that blog site. If you do >>> not know how to do this, then perhaps your best option is to reflash the >>> entire eMMC. >>> >>> If you have data on the eMMC that you need / want to keep. You can back >>> that up fairly easily before reflashing . . . >>> >>> On Fri, Feb 19, 2016 at 4:44 PM, Audrey <[email protected]> wrote: >>> >>>> Hi everyone, >>>> >>>> I want to enable SPI0 on beaglebone black, and I've been following >>>> resources online: >>>> >>>> >>>> http://embedded-basics.blogspot.com/2014/10/enabling-spi0-on-beaglebone-black.html >>>> http://elinux.org/BeagleBone_Black_Enable_SPIDEV >>>> >>>> after changing uEnv.txt and rebooting bbb however, bbb doesn't come >>>> back online. All 4 of the usr LEDs are on, and I can no longer connect back >>>> to beaglebone. >>>> >>>> Firstly, a few clarifications, in My Computer > BeagleBone Getting >>>> Started, I did not find any uEnv.txt file, but nfs-uEnv.txt. The contents >>>> of nfs-uEnv.txt are: >>>> >>>> ##Rename as: uEnv.txt to boot via nfs >>>>> ##https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt >>>>> ##SERVER: sudo apt-get install tftpd-hpa >>>>> ##SERVER: TFTP_DIRECTORY defined in /etc/default/tftpd-hpa >>>>> ##SERVER: zImage/*.dtb need to be located here: >>>>> ##SERVER: TFTP_DIRECTORY/zImage >>>>> ##SERVER: TFTP_DIRECTORY/dtbs/*.dtb >>>>> ##client_ip needs to be set for u-boot to try booting via nfs >>>>> client_ip=192.168.1.101 >>>>> #u-boot defaults: uncomment and override where needed >>>>> #server_ip=192.168.1.100 >>>>> #gw_ip=192.168.1.1 >>>>> #netmask=255.255.255.0 >>>>> #hostname= >>>>> #device=eth0 >>>>> #autoconf=off >>>>> #root_dir=/home/userid/targetNFS >>>>> #nfs_options=,vers=3 >>>>> #nfsrootfstype=ext4 rootwait fixrtc >>>>> >>>> >>>> In the embedded-linux blog, he suggested to delete everything in the >>>> file and put in >>>> >>>> optargs=quiet drm.debug=7 capemgr.enable_partno=BB-SPI0-01 >>>>> >>>>> >>>> I however followed the instructions from elinux, and just copied the >>>> the above line. After that, I changed the name of the file from >>>> nfs-uEnv.txt to just uEnv.txt and rebooted bbb by typing reboot on the >>>> terminal, and now I don't think bbb works. >>>> >>>> Any ideas on what I'm doing wrong? >>>> >>>> Thanks. >>>> >>>> -- >>>> 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/d/optout. >>>> >>> >>> >> -- > 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/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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