2,9' E-paper display library

Mrshilov · Joined: 24 Jan 2009 Posts: 314 Location: Russia

2.9 inch E-paper display 296x128 (IL3820 controller):

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Library support standard text, BGF & BGL pictures, rotation 180°, SPI3 & SPI4 mode. (SPI mode selects with jumper on back of display)
Video - https://youtu.be/1POmR_bclfE

This display with resolution 296x128 not fit in BGF-picture format. So...
For pictures larger than 255x255 I introduce BGL-picture file format. It support resolution up to 65535x65535 pixels. BGF/BGL converter included in attachment (in evident reasons application has limit 8192x8192):

albertsm · Joined: 09 Apr 2004 Posts: 5921 Location: Holland

Hello Mrshilov

Great to see support for the eInk display.
It seems to work better than my ereader.
As usual, all is inside the zip. And i see there is now also a BGL converter. Very Happy

Thanks for the video and for sharing.

olhexy · Posted: Sat Feb 24, 2018 6:19 pm Post subject:

I just bought the 1,54" 200x200 version of this.
I am hasitating to try it because it is 3.3V, but they also tell on their wiki howto connect it with Arduino Uno.
Uno has a 3.3V supply pin available, but works on 5V.

But the Waveshare wiki FAQ says:
Question:
1. Why the e-Paper cant work with Arduino?
Answer:

The I/O level of Arduino is 5V, and the e-Paper should be driven with 3V3. If your Arduino cant drive the e-Paper successfully, please try to convert the level to 3.3V

You can also try to connect the Vcc pin to the 5V of Arduino to see whether the e-Paper works, but we recommend you not to use 5V for a long time.

I see a contradiction, so what is the right answer?
I want to use it with a 5V AVR and can provide 3.3V to the display. Is it safe then to connect the data lines to 5V AVR?

NOTE:
I have looked for a plugin-ready level converter board, but didn't find one with the connections on the right place.
Ideally it is small, should have 5 > 3.3V LDO and something like TXB0106 IC and be plug compatible by soldering 8pin female and male headers on it.
I hope somebody will offer it soon Wink

EDIT(1):
I passed this question to Waveshare. They replied:
Hello,

Sorry for the mistake on the wiki page. We will modify it. In fact, the Arduino UNO on wiki page we said is our UNO plus and we mistake it. I'm sorry. As our UNO PlUS could switch to 3.3V/5V. If you use the e-Paper on 5V board, you need to add a level convertor, and I'm sorry that we have no plugin-ready board.

EDIT(2):
It is not so clear to me what Waveshare (they do not say it is IL3820 controller, on 2.13" drawing says IL3895) wants me to do with the BUSY an RST pins, but I see how Mrshilov's IL3820 library uses them.
I found additional info about this and VCOM, Waveform, OTP at https://seeeddoc.github.io/2.04inch_E-ink_Display_Shield/ It is a 172x72 e-ink. It uses SSD1606 controller.
Datasheet: https://seeeddoc.github.io/2.04inch_E-ink_Display_Shield/res/SSD1606_Datasheet.pdf

hobby · Joined: 12 Apr 2004 Posts: 109 Location: Brussels

Hi,

Tested with Mega 2560 @ 16Mhz, works perfectly.

Very Good Job.
Many Thanks
Olivier

mkcreta · Joined: 10 Dec 2006 Posts: 12

Hello all
Is this code support a third color for this display?