Orange Pi PC2

The OpenBSD gpioctl command can be used to access the Orange Pi PC2's gpio pins. Eight gpio devices are in dmesg. After creating devices in /dev for them (only gpio0, gpio1, and gpio2 are created by default) they can be queried to see what pins are usable,

Device	Pins
gpio0	20
gpio1	0
gpio2	17
gpio3	3
gpio4	16
gpio5	1
gpio6	14
gpio7	10

The pins on the connector map to the gpio device pins as follows.

OpenBSD GPIO pin mapping for PC2

GPIO	Pin	Pin	GPIO
3.3v	1	2	5v
0-12	3	4	5v
0-11	5	6	Gnd
0-6	7	8	2-5
Gnd	9	10	2-6
0-1	11	12	3-14
0-0	13	14	Gnd
0-3	15	16	2-4
3.3v	17	18	2-7
0-15	19	20	Gnd
0-16	21	22	0-2
0-14	23	24	0-13
Gnd	25	26	0-21
0-19	27	28	0-18
0-17	29	30	Gnd
0-8	31	32	6-8
0-9	33	34	Gnd
0-10	35	36	6-9
3-11	37	38	6-6
Gnd	39	40	6-7

The gpio0 pin 20 lights a red LED next to the green power LED on the board.

Installing onto the Orange Pi PC 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-pc2.dtb /mnt
• doas umount /mnt
• doas dd if=/usr/local/share/u-boot/orangepi_pc2/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 PC2 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