eink_ssd1619_er-epm042-1

Sample code and docs for eink/epaper ER-EPM042-1R EastRising SSD1619 used on ER-EPM042A1-1R white, black, and Red 4.2" inch e-Ink Display Module 400x300

Hardware available from https://www.buydisplay.com/red-4-2-inch-e-ink-display-module-400x300-for-arduino-raspberry-pi

Contains pure Python (3 and 2.7) library and sample/demo to load/display any image. Also contains original sample C code for Raspberry Pi using either bcm2835 or wiringpi over SPI (Raspberry Pi Library and Example for 4-wire SPI from https://www.buydisplay.com/red-4-2-inch-e-ink-display-module-400x300-for-arduino-raspberry-pi).

Differences in this repo to original tutorial zip:

• Rename ER-EPD(M)042A1-1_Raspberry_Pi_Tutorial directory to ER-EPM042-1_Raspberry_Pi
• Rename Library-Example_ER-EPD(M)042A1-1B directory to ER-EPM042A1-1B
• Rename Library-Example_ER-EPD(M)042A1-1R directory to ER-EPM042A1-1R

Contains samples for Black and White board ER-EPM042A1-1B and Red, Black and White board ER-EPM042A1-1R. BW code can be ran against Red board. Samples for:

• bcm https://www.airspayce.com/mikem/bcm2835/
• wiringpi https://github.com/WiringPi/WiringPi

Directories:

• ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1B Black and White only
• ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R Red, Black and White

Raspberry pi SPI notes

https://pimylifeup.com/raspberry-pi-spi/

Enable via:

sudo raspi-config  # enable SPI

Sanity checks:

ls /dev/*spi*

pi@pizero:~ $ cat /boot/config.txt|grep -i spi
#dtparam=spi=on

pi@pizero:~/ $ cat /boot/config.txt|grep -i spi
dtparam=spi=on

pi@pizero:~ $ lsmod | grep spi
pi@pizero:~ $

pi@pizero:~/ $ lsmod | grep spi
spidev                 20480  0
spi_bcm2835            20480  0

Building and running

Assuming build dependency installed, issue make in sample directory. Both samples create an epd binary.

The sample has very little error checking and will crash if:

• not ran in the current directory (i.e. calling with absolute path leads to crashes when attempting to load images/bitmaps)
• when not ran as root for bcm demo (wiringpi can run as regular user)

I.e.

cd ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R/bcm2835 ; make ; sudo ./epd
cd ../../..
cd ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R/wiringpi ; make ; ./epd
cd ../../..
cd ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R/python ; time sudo `which python` epd.py clear   # clear screen, then enter sleep mode
cd ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R/python ; time sudo `which python` epd.py   # clear screen, load sample images, then enter sleep mode
cd ER-EPM042-1_Raspberry_Pi/ER-EPM042A1-1R/python ; time sudo `which python` display_image.py FILENAME  # load image and display it, any format supported by Python Pillow/PIL