7/28/2023 0 Comments U boot tftpbootHere are details about booting the Beagle Bone Black Wireless board through NFS. Exponential back-off algorithm for IP packet fragm.BeagleBoneBlack Wireless board booting through tftp and NFS.Cross-compiling openldap on Debian Wheezy.The boot script distinguishes factory u-boot from ArchLinux by probing for USB support (this is what "if usb start" is for).The ppv4-install.sh script writes ArchLinux u-boot to /dev/mtd0 for 4 blocks at 1MB offset, avoid overwriting the default u-boot.It's probably based on Pogoplug V4's u-boot at 1.1.4, except with USB enabled somehow.Upon closer inspection, I noticed a few things about ArchLinux's U-boot. I did manage to get the u-boot from ArchLinux's PogoPlug v4 u-boot to work. I've tested Davy Gravy's patch for pogo_v4_config but couldn't get it to work. This proves that Pogoplug V4 doesn't like sheevaplug's configuration. We can now tftp load the u-boot.bin we compiled for sheevaplug_config. Hit any key to stop autoboot: 0 do it now!ĭon't forget to hit any key to stop at this point! And then after setenv serverip and ipaddr again. When we start executing the chainloaded U-Boot, it will appear as if the device has reset itself, but it's really our newly compiled binary (see the U-Boot compilation date). The chainloaded U-Boot will relocate itself back to 0圆7FFF0 which is the default CONFIG_SYS_TEXT_BASE. The convention is to always chainload to 0x800000. We need to specify the filename and the memory location it will be written to once downloaded. Here I'm also setting the correct TFTP server's IP address I want to be using.Īnd now we can TFTP. Essentially we're using the DHCP command just to get an IP address. TFTP from server 10.0.5.1 our IP address is 10.0.5.206Īt this point your device will forget its IP address, but you can set it back using setenv. *** Warning: no boot file name using '0A0005CE.img' *** Unhandled DHCP Option in OFFER/ACK: 28 It's using 10.0.5.1 (gateway) as the TFTP but my TFTP is at 10.0.5.33. You'll need to hit Ctrl-C to abort loading because my DHCP doesn't give out the correct TFTP server's address. This enters the device's factory default U-Boot prompt (not the one you just compiled). Hit any key to stop autoboot: 0 Do it now! PEX 0: PCI Express Root Complex Interface Mem malloc Initialization (8M - 7M): Done U-Boot code: 00600000 -> 0067FFF0 BSS: -> 006918B4ĭRAM CAS Latency = 3 tRP = 3 tRAS = 8 tRCD=3Īddresses 8M - 0M are saved for the U-Boot usage. Over serial console, power on the device and hit enter as soon as you see: Make CROSS_COMPILE=arm-linux-gnueabi- all Make CROSS_COMPILE=arm-linux-gnueabi- pogoplug2_config But before that let's do a comparison with what works: the Pogoplug V4 opensourced U-Boot at 1.1.4. Before I continue, I just want to say that sheevaplug_config doesn't work on pogoplug v4. This creates a u-boot.bin in the u-boot source directory. make CROSS_COMPILE=arm-linux-gnueabi- all.make CROSS_COMPILE=arm-linux-gnueabi- sheevaplug_config.To enable ext4, you might want to apply this patch.cd u-boot & git checkout v2013.04 # use a later release if appropriate.Install emdebian cross compilation toolchain which installs /usr/bin/arm-linux-gnueabi.This is based on notes from Always Innovating but using a different configuration. You don't need to configure DHCP to hand out the tftp server's IP address just for testing. Make sure everyone can read the file copied there. This is just as easy as apt-get install tftpd-hpa and then copy the file to the serving directory, which is /srv/tftp by default. Better not take the risk.įirst setup a tftpd-hpa server. Although according to this circuit board breakdown, there are suspected I/O connection to a 5-pin J15 to the Hynix NAND flash chip, it is not clear if I'd be able to flash a bricked device. Before I flash my PogoPlug v4 with a custom compiled u-boot, I thought it is prudent to be able to test it and make sure it works before I permanently brick the device.
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