Optimise GxEPD2 Display

sqfmi / Watchy

Watchy - An Open Source E-Ink Smartwatch

http://www.sqfmi.com

MIT License

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Optimise GxEPD2 Display #178

Closed DarkZeros closed 1 year ago

DarkZeros commented 1 year ago

This change implements certain speed improvements on top of upstream GxEPD2 that are not fully accepted by the upstream maintainer. https://github.com/ZinggJM/GxEPD2/pull/51
The change Adds a new WatchyDisplay class and implements the mods in there.

Changes:

Using transactions for SPI communication
Remove extra delays for yield()
Remove 10ms active waits in resets

Results:

This reduces (874ms -> 657ms) the display update. Making it more responsive and Saving 21mJ/update or 2.6mAh/day

shtrom commented 1 year ago

I have been running this for about 6 weeks now, and have noticed a notable increase in battery life. I'd say about 2 days, which would be a 50% improvement (on the ~4 days that I had before).

sqfmi commented 1 year ago

Amazing! Thanks @DarkZeros 🥇

GuruSR commented 1 year ago

Any thoughts about including the border color setting?

DarkZeros commented 1 year ago

Any thoughts about including the border color setting?

Now that we have this code here, I don't see why not.

GuruSR commented 1 year ago

Any thoughts about including the border color setting?

Now that we have this code here, I don't see why not.

Okay, my repo has the info on how it is done and the function, if it was kept the same, people already using it will not have to change their code (other than the display object definition). Has this made it's way into Arduino's library listing?