$ git clone --recursive https://github.com/wuhanstudio/u8g2-arm-linux.git
$ cd u8g2-arm-linux
# Build source with GPIO character device
$ make CPPFLAGS=-DPERIPHERY_GPIO_CDEV_SUPPORT=1 CC=gcc CXX=g++
# Build source with GPIO sysfs (legacy)
$ make CC=gcc CXX=g++
$ ls bin/
Check wiki here for the kernel set up.
U8g2 is a monochrome graphics library for embedded devices, and I ported it onto arm linux.
It should work fine on virtually all devices running linux with i2c, spi support, since no libraries pertaining to specific platforms has been used, yet you need to choose right compilers for your devices.
[●] Hardware I2C
[●] Hardware SPI
[●] Software I2C
[●] Software SPI
[●] 8080 mode
[●] Add C++ wrapper
[●] Faster GPIO by tracking fd
[●] Better build system
[●] Upstream the port
[●] Replace sysfs with gpiod
[ ] Benchmark
Nanopi
http://wiki.friendlyarm.com/wiki/index.php/NanoPi
Nanopi NEO
http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO
Raspberry Pi ZERO
https://www.raspberrypi.org/products/raspberry-pi-zero/
Raspberry Pi 2 B+
https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
Orange Pi ZERO
http://www.orangepi.org/orangepizero/
Lichee Pi NANO
http://nano.lichee.pro/
C-SKY
https://c-sky.github.io/docs/gx6605s.html
First, clone this repo:
$ git clone --recursive https://github.com/wuhanstudio/u8g2-arm-linux.git
$ cd u8g2-arm-linux
Change the cross-compiler according to your board.
# Chosse proper compiler for your PI
# NanoPi: arm-linux-gnueabi-gcc
# Raspberry Pi Zero: arm-linux-gnueabi-gcc
# Raspberry Pi 2: arm-linux-gnueabihf-gcc
# OrangePi Zero: arm-linux-gnueabihf-gcc
# NanoPi NEO: arm-linux-gnueabihf-gcc
# NanoPi NEO Plus 2: arm-linux-gnueabihf-gcc
# C-SKY: csky-linux-gcc
CC = arm-linux-gnueabihf-gcc
For cross-compile:
arm-linux-gnueabi-gcc for armv6
arm-linux-gnueabihf-gcc for armv7
For native-compile (compile on your board), simply use:
CC = gcc
Finally, time to compile:
# Build source with GPIO character device
$ make CPPFLAGS=-DPERIPHERY_GPIO_CDEV_SUPPORT=1 CC=gcc CXX=g++
# Build source with GPIO sysfs (legacy)
$ make CC=gcc CXX=g++
Before running, you can check your I2C devices using i2c-tools:
$ sudo apt-get install i2c-tools
List your devices:
$ ls /dev/i2c*
/dev/i2c-0 /dev/i2c-1
Probe your devices on bus 1:
$ i2cdetect -y -r 1
For cross-compile, you can change ip address in Makefile:
# IP Address of your PI
[email protected]
Then upload generated binary file onto your board:
$ make upload
- Author：Han Wu
- Homepage：http://wuhanstudio.cc
- Contact：https://github.com/wuhanstudio/u8g2-arm-linux/issues