Flexible Monochrome eInk (4243) + eInk Breakout Friend probl

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bob2341234
 
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Joined: Tue Sep 14, 2021 5:34 pm

Flexible Monochrome eInk (4243) + eInk Breakout Friend probl

Post by bob2341234 »

I am trying to get these to work together:
https://www.adafruit.com/product/4243
https://www.adafruit.com/product/4224
Arduino Uno made by Elegoo

I wired it up based on the instructions on p23 of the Adafruit eInk Display Breakouts and FeatherWings guide

I'm using Arduino IDE 1.8.16

I installed the required libraries.


I ran EPDTest.ino w/ the following modification since the datasheet on the eInk display product sheet shows the text "IL0373" on page 5

Code: Select all

//Uncomment the following line if you are using 2.13" EPD with IL0373
Adafruit_IL0373 display(212, 104, EPD_DC, EPD_RESET, EPD_CS, SRAM_CS, EPD_BUSY);
#define FLEXIBLE_213
The display doesn't update and doesn't seem to get past the line "display.display();"

Also worth noting:
  • I probed a few of the lines for signs of life and I do see SPI-ish looking signals on SCK and MOSI.
  • At certain points in my tinkering the display actually did update, but not in a controlled way (display would either get cloudy or clear). I don't remember what exact conditions made this happen. I *think* one of the signs of life came when I hit the reset button on the dev board.
  • 3V3 pin is giving me 3.3V, which is evidence that board isn't burned

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bob2341234
 
Posts: 4
Joined: Tue Sep 14, 2021 5:34 pm

Re: Flexible Monochrome eInk (4243) + eInk Breakout Friend p

Post by bob2341234 »

I found that the file EPDTest.ino associated w/ Adafruit EPD 4.4.2 doesn't agree with the instructions in the previous post:

from EPDTest.ino:

Code: Select all

#define EPD_CS     10
#define EPD_DC      9
#define SRAM_CS     11
#define EPD_RESET   5 // can set to -1 and share with microcontroller Reset!
#define EPD_BUSY    7 // can set to -1 to not use a pin (will wait a fixed delay)
should be

Code: Select all

#define EPD_CS     10
#define EPD_DC      9
#define SRAM_CS     8
#define EPD_RESET   5 // can set to -1 and share with microcontroller Reset!
#define EPD_BUSY    3 // can set to -1 to not use a pin (will wait a fixed delay)
for it to be in agreement w/ the instructions on p23 of the Adafruit eInk Display Breakouts and FeatherWings guide

eInk display is still not responding though.

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bob2341234
 
Posts: 4
Joined: Tue Sep 14, 2021 5:34 pm

Re: Flexible Monochrome eInk (4243) + eInk Breakout Friend p

Post by bob2341234 »

issue turned out to be a bad breadboard. works great now

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