README
¶
epdfuse 
epdfuse is a library for interacting with the PaPiRus epaper display using golang and the repaper epd fuse native library.
This library provides the ability to write arbitrary text and images to the display as well as clear the display.
It leverages the goxbm project to convert images to the XBM format used by EPD Fuse.
Install and setup
Install Go
Go runs easily on the Raspberry PI. This stackexchange answer provides a quick overview: http://raspberrypi.stackexchange.com/a/46828/167.
If cross compiling on a different computer, use these settings GOARM=5 GOOS=linux GOARCH=arm.
GOARM=5 GOOS=linux GOARCH=arm go build
Install Fuse Driver
The repaper fuse driver is required to use this golang library.
# Install fuse driver
apt-get install libfuse-dev -y
# Install fonts
apt-get install fonts-freefont-ttf -y
rm -R /tmp/papirus
mkdir /tmp/papirus
cd /tmp/papirus
git clone https://github.com/repaper/gratis.git
cd /tmp/papirus/gratis
make rpi EPD_IO=epd_io.h PANEL_VERSION='V231_G2'
make rpi-install EPD_IO=epd_io.h PANEL_VERSION='V231_G2'
systemctl enable epd-fuse.service
systemctl start epd-fuse
Get the go-epdfuse project
Download and install the project with go
go get github.com/wmarbut/go-epdfuse
Run an example
cd $GOPATH/github.com/wmarbut/go-epdfuse/examples/papirus-text
go build
./paprius-text "Hello World!"
Documentation
¶
Index ¶
Examples ¶
Constants ¶
const DISPLAY_PATH = "/BE/display"
const EPD_COMMAND_PATH = "/command"
const EPD_DEFAULT_HEIGHT = 96
const EPD_DEFAULT_PATH = "/dev/epd"
const EPD_DEFAULT_WIDTH = 200
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type EpdCommand ¶
type EpdCommand byte
const ( // EPD Command to trigger a display update COMMAND_UPDATE EpdCommand = 'U' // EPD Command to clear display COMMAND_CLEAR EpdCommand = 'C' // EPD Command to trigger a partial display update COMMAND_PARTIAL EpdCommand = 'P' )
type EpdFuse ¶
Configures EPD Fuse
func NewCustomEpdFuse ¶
Create a new EpdFuse to interact with your display
Example ¶
NewCustomEpdFuse("/dev/epd", 200, 96)
Output:
func (*EpdFuse) WriteImage ¶
Write image to your PaPiRus display
Example ¶
f, err := os.Open("example_image.png")
if err != nil {
panic(err)
}
defer f.Close()
img, err := png.Decode(f)
fuse := NewEpdFuse()
fuse.WriteImage(img)
Output:
func (*EpdFuse) WriteImagePartial ¶
Write partial image to your PaPiRus display
Source Files
Directories