Hello William. Thanks. > For starters, we'd need to see your uEnv.txt file. After that, while it is > possible to troubleshoot an issue like this without a serial debug cable( > I've done it, and it is not any fun ). You'd > have to be very meticulous, > and know exactly how the process works completely.
Serial cable is always in use :) Some uEnv and serial spew at end of post. It does not look like it even tries to TFTP zImage+dtb > Anyway here is a link to a guide I wrote a couple years ago: > http://www.embeddedhobbyist.com/2013/06/beaglebone-black-network-boot/ Yep. Saw that in my travels. Very useful but a little dated. Keep in mind that zImage should now work, so everything pertaining to uImage needs to be changed, or ignored( in the case of mkimage ). > Just a note though . . . You *need* flash media ( sdcard / eMMC ) anyway, for > MLO and uboot.image . . . so I figure what does it hurt to boot the kernel > off flash media, and just load > the rootfs from NFS ? Anyway, this is what I do now days myself, so have not > personally bothered with TFTP boot since I wrote that guide. Yes, I certainly understand that. At the moment I'm just trying to make sure I've got 100% control over then environment. And it don't feel that way :) TAIA ----------------------------------------------------uEnv uname_r=4.1.0-bone9 loadaddr=0x82000000 fdtaddr=0x88000000 rdaddr=0x88080000 initrd_high=0xffffffff fdt_high=0xffffffff console=ttyO0,115200n8 ipaddr=192.168.1.111 serverip=192.168.1.115 gateway=192.168.1.254 netmask=255.255.255.0 bootdelay=1 bootfile=boot/zImage fdtfile=boot/dtbs/4.1.0-bone9/am335x-boneblack.dtb rootpath=/home/jevans/bone/rootfs netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs rootdelay=10 nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=${ipaddr}:${serverip}:${gateway}:${netmask}:${hostname}:eth0:off netboot=echo ----------BOOTING NFS----------; tftp ${loadaddr} ${bootfile}; tftp ${fdtaddr} ${fdtfile}; run netargs; bootz ${loadaddr} - ${fdtaddr} uenvcmd=run netboot --------------------------------serial (seriously snipped with just a few odd bits------------------------- cpsw Hit any key to stop autoboot: 0 gpio: pin 53 (gpio 53) value is 1 switch to partitions #0, OK mmc0 is current device gpio: pin 54 (gpio 54) value is 1 Checking for: /uEnv.txt ... Checking for: /boot.scr ... Checking for: /boot/boot.scr ... Checking for: /boot/uEnv.txt ... gpio: pin 55 (gpio 55) value is 1 785 bytes read in 17 ms (44.9 KiB/s) Loaded environment from /boot/uEnv.txt Checking if uname_r is set in /boot/uEnv.txt... gpio: pin 56 (gpio 56) value is 1 Running uname_boot ... loading /boot/vmlinuz-4.1.0-bone9 ... 6878968 bytes read in 394 ms (16.7 MiB/s) loading /boot/boot/dtbs/4.1.0-bone9/am335x-boneblack.dtb ... ** File not found /boot/boot/dtbs/4.1.0-bone9/am335x-boneblack.dtb ** debug: [console=ttyO0,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait fixrtc] ... debug: [bootz 0x82000000 - 0x88000000] ... Kernel image @ 0x82000000 [ 0x000000 - 0x68f6f8 ] ERROR: Did not find a cmdline Flattened Device Tree Could not find a valid device tree -- 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.
