> > *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.
