Add examples and lint

[tannewt]

Needs a version of CircuitPython not yet available. Keep an eye out for an ePaper display PR

[makermelissa]

Ok @tannewt, it's not working and it's probably something I'm doing wrong, but here's what I did so far. First pulled in the tannewt/epd and compiled for the Feather M4 Express, which was successful. Then I loaded it on the the Feather. I made sure this library was copied over and I used the simepletest example. Here's the error I'm getting:

Traceback (most recent call last):
  File "code.py", line 11, in <module>
  File "/lib/adafruit_il0373.py", line 71, in <module>
AttributeError: 'module' object has no attribute 'EPaperDisplay'

My guess is I need to enable something in some config file to enable ePaper Display support. Thanks.

[makermelissa]

Nevermind. I compiled while in the wrong branch.

[makermelissa]

Ok, no errors this time, but it doesn't draw to the EPD. In serial, it says "refreshed" but retains the previous thing that was drawn without drawing anything new.

[makermelissa]

Oops, didn't realize it needed to work with Tricolor display. Swapped it and it worked great. I'll go through the rest of the examples and if it looks good, I'll approve.

[makermelissa]

It looks like you were using the I2C pins for SPI. Let's just change it to board.SPI(). After changing that on my system, it worked great.

[tannewt]

Are you using a Metro or a Feather? I really dislike using the SPI pins on the Metro because I can never remember which is which. Maybe I should just change this to using a Feather?

[makermelissa]

I'm using the Metro. I pretty much have the 3 SPI pins burned into my memory from hooking up displays all the time. However, I'm also thinking of consistency for the user experience like for example, they want to try and mash together multiple examples, using SPI for SPI will make that easier. If we want to convert to a feather, I'm also fine with that.

[ladyada]

yeah we can use a feather m4 for wiring/testing. please change the SCL/SDA pins to the SPI() default interface

[makermelissa]

Looks good. Thanks!