Orange Pi Zero 2

OpenBSD GPIO pin mapping for Pi Zero 2 26 pin connector

GPIO	Pin	Pin	GPIO
3.3v	1	2	5v
7-5	3	4	5v
7-4	5	6	Gnd
2-9	7	8	7-2
Gnd	9	10	7-3
2-6	11	12	2-11
2-5	13	14	Gnd
2-8	15	16	2-15
3.3v	17	18	2-14
7-7	19	20	Gnd
7-8	21	22	2-7
7-6	23	24	7-9
Gnd	25	26	2-10

The 13 pin analog connector also has three gpio pins. Numbered from the top pin 2 is gpio8 pin 6, pin 3 is gpio8 pin 16, pin 4 is gpio2 pin 1.

Installing OpenBSD

Installing onto the Orange Pi Zero 2 you'll need the dtb and the u-boot-sun50i packages.

• doas vnconfig vnd0 miniroot75.img
• doas mount /dev/vnd0i /mnt
• doas cp /usr/local/share/dtb/arm64/allwinner/sun50i-h5-orangepi-zero2.dtb /mnt
• doas umount /mnt
• doas dd if=/usr/local/share/u-boot/orangepi_zero2/u-boot-sunxi-with-spl.bin of=/dev/vnd0c bs=1024 seek=8
• doas vnconfig -u vnd0
• doas dd if=miniroot75.img of=/dev/rsd0c

Once the boot media is done, insert it into the Zero2 and boot it. Remember, it defaults to a serial console. Perform the OpenBSD install as usual.

To use HDMI out, create /etc/boot.conf containing the line:

set tty fb0

This tells the kernel to use the frame buffer as the console. You can also run X. To get X running on startup:

doas rcctl enable xenodm

Packages

Packages on the mirrors are named differently to the install, arm64 are in /pub/OpenBSD/6.8/packages/aarch64. To make the package manager easy to use, set the PKG_PATH environment variable to something useful in your .profile, e.g.

PKG_PATH=https://ftp.openbsd.org/pub/OpenBSD/7.3/packages/aarch64/
export PKG_PATH