Show pagesourceOld revisionsBacklinksBack to top × Table of Contents TI BeagleBoard Supported Versions Hardware Highlights Installation Boot from NAND Boot from SD card SD Card Layout Bootpartiton OEM easy installation Upgrading OpenWrt Basic configuration Specific Configuration Buttons Hardware Info Photos Opening the case Serial JTAG Debricking Bootloader Mods run Bootloader manually Hardware mods Bootlogs Bootlogs from uboot OEM bootlog OpenWrt bootlog Notes Tags TI BeagleBoard supported in trunk since 45238 Setups might require some customization with booting. Supported Versions Version/Model Launch Date S/N OpenWrt Version Supported Model Specific Notes C4 2009 - trunk (r45238) EBV BeagleBoard (clone) OEM source code available at: Hardware Highlights SoC Ram Flash Network USB Serial JTag TI AM3550@720MHz 256MiB 256MiB NAND 0 Yes Yes Yes BeagleBoard-xM, BeagleBone, BeagleBone black have similar hw. Manufacturer's site: http://beagleboard.org/Products/ Installation Pressing “USR” button when power is connected OR during the pressing and release of “RESET” button enables booting from SD card. Available booting from: - onboard NAND - SD card - USB storage Boot from NAND Valid uboot, kernel and rootfs should be flashed onto NAND. Boot from SD card SD Card Layout Please check out the article flash.layout. It contains an example and a couple of explanations. A FAT32 boot partition with the MLO, u-boot.img, devicetree file (*.dtb) and the kernel (zImage). A ext2 / ext3 / ext4 rootfs partition where you unpack openwrt-…-rootfs.tar.gz to. The partition type depends on Kernel commandline in uboot env vars. The first partition /dev/mmcblk0p1 is the boot partition which contains the boot loaders (MLO, u-boot.img) and kernel. ls /mnt/p1/ MLO omap3-beagle.dtb u-boot.img uEnv.txt zImage Bootpartiton MLO is the first stage bootloader. OEM/Factory/TI has X-loader by default. There are some X-loader bugs. OpenWrt uses u-boot for first and second stage. user.txt oder uEnv.txt (2014, newer) or boot.pcr (older) depending on uboot version can change boot “stuff”. uEnv.txt: kernel_file=openwrt-omap-zImage loadzimage=load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${kernel_file} loadfdt=load mmc ${mmcdev}:${mmcpart} ${fdtaddr} ${fdtfile} console=ttyO2,115200n8 optargs="debug init=/etc/preinit" mmcroot=/dev/mmcblk0p2 rw mmcrootfstype=ext2 rootwait rootfstype=${mmcrootfstype} ${optargs} mmcargs=setenv bootargs console=${console} root=${mmcroot} ${mmcrootfstype} verbose debug uenvcmd=run loadzimage; run loadfdt; run mmcargs; bootz ${loadaddr} - ${fdtaddr} OEM easy installation 1. Prepare SD card 2.0 Insert SD card anytime, power up board 2. press USR button (skips integrated bootloader on NAND); keep it pressed until 5. 3. press RESET 4. booting can take a while Errors are signaled via screen color OR visible in serial console. orange screen : uboot errors Upgrading OpenWrt - Overwrite the Kernel image and the content of the rootfs (SD card partition 2 ) Basic configuration Specific Configuration Buttons → hardware.button on howto use and configure the hardware button(s). The Beagleboard has two buttons. BUTTON Event Reset reset USR select boot mode, user specific later Hardware Info Instruction set: ARM Vendor: BeagleBoard bootloader: U-Boot System-On-Chip: AM…. CPU @Frq AM335x@720MHz Flash size: 256 MiB Flash Chip: not visible (PoP/Sandwich) RAM size: 256 MiB RAM Chip: not visible (PoP … package on package) Wireless No1: none switch: none Modem: none USB: Yes 1 x 2.0 , 1 x OTG Serial: Yes JTAG: Yes Photos Opening the case Note: Since the BeagleBoard ships without a case, this can't void your warranty. :) Serial ICD10 to DB9 adapters and some Null modem cable work. Pin 1 is “red” part of adapter cable There are differences between ICD10(pin header) → DB9(classic serial port) and Null modem cabling. From 3 identical looking null modem cables only 1 works (different cable types?) ICD10 → DB9 → Null modem cable → PL2303 serial to USB adapter from VIANCO white case with blue stripe; lsusb: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port JTAG → port.jtag general information about the JTAG port, JTAG cable, etc. How to connect to the JTAG Port of this specific device: Photo of PCB with markings Debricking There is a JTAG Bootloader Mods you could read about bootloader in general There are several scripts available in uboot. These are inside uboot variables and can be executed with the run command. bootcmd var in uboot-omap 2013 run findfdt; mmc dev ${mmcdev}; if mmc rescan; then if run userbutton; then setenv bootenv uEnv.txt; else setenv bootenv user.txt; fi; echo SD/MMC found on device ${mmcdev}; if run loadbootenv; then echo Loaded environment from ${bootenv}; run importbootenv; fi; if test -n $uenvcmd;then echo Running uenvcmd ...; run uenvcmd; fi; if run loadimage; then run mmcboot; fi; fi; run nandboot; setenv bootfile zImage; if run loadimage; then run loadfdt; run mmcbootz; fi; compare to upstream: omap3_beagle uboot git head run Bootloader manually unordered (!) examples run bootcmd run findfdt run validatefdt run loadbootenv run loadramdisk run loadbootscript //in newer u-boot loadimage run bootscript run mmcboot run mmcbootz run nandboot run ramboot usb - USB sub-system usbboot - boot from USB device Hardware mods as a beginner, you really should inform yourself about soldering in general and then obtain some practical experience! Bootlogs Bootlogs from uboot serial log uEnv.txt case: Hit any key to stop autoboot: 3 2 1 0 mmc0 is current device gpio: pin 173 (gpio 173) value is 1 gpio: pin 7 (gpio 7) value is 0 SD/MMC found on device 0 reading uEnv.txt 442 bytes read in 5 ms (85.9 KiB/s) Loaded environment from uEnv.txt Importing environment from mmc ... Running uenvcmd ... reading zImage 1860848 bytes read in 144 ms (12.3 MiB/s) reading omap3-beagle.dtb 15169 bytes read in 9 ms (1.6 MiB/s) Kernel image @ 0x80200000 [ 0x000000 - 0x1c64f0 ] ## Flattened Device Tree blob at 80f80000 Booting using the fdt blob at 0x80f80000 Using Device Tree in place at 80f80000, end 80f86b40 Starting kernel ... serial log user.txt case: mmc0 is current device gpio: pin 173 (gpio 173) value is 1 gpio: pin 7 (gpio 7) value is 1 SD/MMC found on device 0 reading user.txt ** Unable to read file user.txt ** ** File not found /boot/uImage ** Booting from nand ... OEM bootlog OpenWrt bootlog Notes A lot of usefull information about this board can be found here: Links: http://elinux.org/Beagleboard http://en.wikipedia.org/wiki/BeagleBoard Tags How to add tags omap, 256NAND, 256ram, 0WNIC, 0NIC, no switch, USB, gt32flash, ARM This website uses cookies. By using the website, you agree with storing cookies on your computer. Also you acknowledge that you have read and understand our Privacy Policy. If you do not agree leave the website.OKMore information about cookies omap 256nand 256ram 0wnic 0nic no switch usb gt32flash arm Last modified: 2021/04/19 15:57by tmomas