6.1.1. Boot Flow

BeagleBadge has a TI AM62L SoC, refer to AM62Lx Boot Flow for more details on AM62L boot flow.

6.1.2. Applications

DeepSleep Low Power mode as low as 350mW power draw
RTC only mode with 3-5mW power draw
E-Paper display support with tinyDRM
Battery-powered with fuel gauge monitoring

6.1.3. Low level sources

Component	Branch	Source File	Build Instructions
U-Boot	ti-u-boot-2025.01	`configs/am62lx_beaglebadge_defconfig`	U-Boot Build Guide
Linux Kernel	ti-linux-6.12.y	`arch/arm64/boot/dts/ti/k3-am62l3-beaglebadge.dts`	Linux Kernel Build Guide

6.1.4. Building for BeagleBadge

$ git clone https://git.ti.com/git/arago-project/oe-layersetup.git tisdk
$ cd tisdk
$ ./oe-layertool-setup.sh -f configs/arago-scarthgap-config.txt
$ cd build
$ . conf/setenv
$ export MACHINE=beaglebadge-ti
$ bitbake -k tisdk-default-image

For more information on building Arago for BeagleBadge, go here.

Note

Yocto: The BeagleBadge’s 256MB LPDDR memory might limit the free memory available for developing applications with the default, TI-provided Arago distribution image. Switching to sysVinit for init system instead of systemd and building TI tiny image can help reduce the memory footprint. Please go here for a comparison of both init systems.

$ ARAGO_SYSVINIT=1 bitbake -k tisdk-tiny-image

To build Armbian for BeagleBadge, refer to Debian SDK user manual found here.

6.1.5. Booting BeagleBadge

BeagleBadge supports four boot modes with the following configuration:

Button Select Pressed	Primary boot mode	Backup boot mode
Yes	SD boot	USB-DFU boot
No	OSPI boot	UART boot

In the following instructions, assume /dev/ttyUSB0 is the serial port enumerated on host machine from BeagleBadge USB C connection.

6.1.5.1. SD boot

Flash SD card with Debian or Arago image

Insert Micro SD card

Press & hold Select until step 5

Connect USB C cable

Connect to /dev/ttyUSB0 on host machine

6.1.5.2. OSPI boot

Boot via SD boot and stop at u-boot prompt

Flash OSPI

=> sf probe
SF: Detected is25wx256 with page size 256 Bytes, erase size 4 KiB, total 32 MiB
=> fatload mmc 1 ${loadaddr} tiboot3.bin
221296 bytes read in 11 ms (19.2 MiB/s)
=> sf update ${loadaddr} 0 ${filesize}
device 0 offset 0x0, size 0x36070
SF: 221296 bytes @ 0x0 Written: OK
=> fatload mmc 1 ${loadaddr} tispl.bin
1464080 bytes read in 62 ms (22.5 MiB/s)
=> sf update ${loadaddr} 0x80000 ${filesize}
device 0 offset 0x80000, size 0x165710
SF: 1464080 bytes @ 0x80000 Written: OK
=> fatload mmc 1 ${loadaddr} u-boot.img
1314747 bytes read in 57 ms (22 MiB/s)
=> sf update ${loadaddr} 0x280000 ${filesize}
device 0 offset 0x280000, size 0x140fbb
SF: 1314747 bytes @ 0x280000 Written: OK

Cold reset the board by disconnecting and reconnecting USB C cable.
Reconnect to /dev/ttyUSB0 on host machine

6.1.5.3. UART boot

Connect USB C cable

Connect to /dev/ttyUSB0 on host machine
Run the following instructions on host machine:
$ sb --xmodem tiboot3.bin > /dev/ttyUSB0 < /dev/ttyUSB0
$ sb --xmodem tispl.bin > /dev/ttyUSB0 < /dev/ttyUSB0
$ sb --ymodem u-boot.img > /dev/ttyUSB0 < /dev/ttyUSB0

6.1.5.4. USB-DFU boot

Press & hold Select until step 4

Connect USB C cable

Connect to /dev/ttyUSB0 on host machine
Send boot loader binaries from host MACHINE
$ sudo -E -S dfu-util -R -a bootloader -D  tiboot3.bin
$ sudo -E -S dfu-util -R -a bootloader -D  tispl.bin
$ sudo -E -S dfu-util -R -a u-boot.img -D u-boot.img

Any of the above boot methods can be used to boot to u-boot prompt, from here, loading the rootfs is generic and can be loaded from SD card, OSPI flash, or USB DFU as is discussed in other sections of this documentation.