this post was submitted on 26 Jun 2025
10 points (100.0% liked)

Ask Electronics

3762 readers
1 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.

founded 2 years ago
MODERATORS
DavideAndrea@discuss.tchncs.de
linker3000@discuss.tchncs.de
10
Is SPI just "slow"? (feddit.org)
submitted 1 month ago* (last edited 1 week ago) by bvoigtlaender@feddit.org to c/askelectronics@discuss.tchncs.de
7 comments fedilink hide all child comments
 

Hi, hope this post is fine in regard of rule 2.

Currently doing some fun stuff with an Arduino and have it hooked up to an 128x160px and communicate with it over SPI. If i color in all 20480 pixels it takes about 2 seconds to be done and i can watch the rows change one after another.

I was wondering if there are some tricks to speed this process up a bit or does it really just come down to minimizing the pixels to be changed?

The module im using is this one: https://www.waveshare.com/wiki/1.8inch_LCD_Module

Here is also my current code if anybody cares to take a look, even though i just rewrote the example code more or less so i would understand it. https://codeberg.org/bvoigtlaender/open-phone/src/branch/main

EDIT: Thanks to jeinzi, nickwitha_k and cmnybo I have managed to bring the rendering time down from 2142ms to 80ms

you are viewing a single comment's thread
view the rest of the comments
[–] bvoigtlaender@feddit.org 3 points 1 month ago

Thank you for the article it is really interesting. Always assumed it would already do just that but it does make sense considering the amount of Controller it has to support. Will be changing that anywhere it gets called often.