Get meta-ti at https://git.yoctoproject.org/cgit/cgit.cgi/meta-ti/.

Tested with:

poky        : warrior:f2b442c5c8e3925a4d3fc9693f1e47863dade2a9
meta-ti     : master:59e66caff2568ab32f59596f1aeab8ea27649941
meta-debian : warrior:e87428eec5edfa6ec741eed8827d7044df043625

1. Setup build directory.

   $ export TEMPLATECONF=meta-debian/conf
   $ source ./poky/oe-init-build-env build-bbb
   

2. Add meta-ti and meta-debian/bsp/meta-ti to conf/bblayers.conf.

   $ vi conf/bblayers.conf
   ...
   BBLAYERS ?= " \
     /path/to/poky/meta \
     /path/to/poky/meta-poky \
     /path/to/poky/meta-ti \
     /path/to/poky/meta-debian \
     /path/to/poky/meta-debian/bsp/meta-ti \
     "
   

3. Set MACHINE to beaglebone.

   $ vi conf/local.conf
   ...
   MACHINE ??= "beaglebone"
   ...
   

4. Build. By default, DISTRO is set to 'deby-tiny', so only core-image-minimal is available to build

   $ bitbake core-image-minimal
   

   In conf/local.conf, DISTRO can be changed to 'deby' for building core-image-base.

After finish building, in tmp/deploy/images/beaglebone/, these files should be available:

• MLO
• u-boot.img (U-Boot)
• zImage (Kernel)
• am335x-boneblack.dtb (Kernel device tree)
• core-image-minimal-beaglebone.cpio.gz (rootfs)

1. Create two partitions on the SD card: BOOT (FAT32) and ROOT (ext4).

2. Install the root file system.

   $ cd /mount/dir/of/ROOT
   $ zcat /path/to/core-image-minimal-beaglebone.cpio.gz | sudo cpio -idm --no-absolute-filenames
   

3. Install the bootloader. If ROOT is the 2nd partition, mmcroot should be /dev/mmcblk0p2.

   $ sudo cp MLO u-boot.img /mount/dir/of/BOOT
   $ sudo cat <<\EOF > /mount/dir/of/BOOT/uEnv.txt
   bootpart=0:2
   bootdir=/boot
   bootfile=zImage
   console=ttyO0,115200n8
   fdtaddr=0x81000000
   fdtfile=am335x-boneblack.dtb
   loadaddr=0x80008000
   mmcroot=/dev/mmcblk0p2 ro
   mmcrootfstype=ext4 rootwait
   mmcargs=setenv bootargs console=${console} root=${mmcroot} rootfstype=${mmcrootfstype}
   loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile}
   loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
   uenvcmd=if run loadfdt; then echo Loaded ${fdtfile}; if run loadimage; then run mmcargs; bootz ${loadaddr} - ${fdtaddr}; fi; fi;
   
   EOF
   

4. Connect serial cable to the board on jumper J1. We tested with Adafruit 4 Pin Cable which has 4 wires: Black, Green, White, Red. Just leave the RED wire unconnected.

   J1   : [GND]   *   *   [RX]    [TX]   *
   Cable: [Black]         [Green] [White]
   

   Boot the board.

   $ sudo picocom -b 115200 /dev/ttyUSB0
   picocom v3.1
   
   port is        : /dev/ttyUSB0
   flowcontrol    : none
   baudrate is    : 115200
   ...<many logs>
   
   U-Boot 2018.03-00002-gac9cce7c6a (Apr 05 2018 - 13:07:46 -0500), Build: jenkins-github_Bootloader-Builder-47
   
   CPU  : AM335X-GP rev 2.1
   I2C:   ready
   DRAM:  512 MiB
   ....<many logs>
   
   Starting kernel ...
   
   [    0.000000] Booting Linux on physical CPU 0x0
   [    0.000000] Linux version 4.19.13-cip1 (oe-user@oe-host) (gcc version 8.3.0 (GCC)) #1 SMP Thu Mar 21 06:02:24 UTC 2019
   [    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d
   .....<many logs>
   starting pid 64, tty '': '/etc/init.d/rcS'
   starting pid 66, tty '/dev/ttyS0': '/sbin/getty 115200 ttyS0'
   
   Deby 10.0 beaglebone /dev/ttyS0
   
   beaglebone login:
   

   Then login with root (no password).