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CamelCaseName / HUB75nano

This Arduino library adds the basic functionality needed to drive a HUB 75 protocol LED Panel up to 64x32 Pixels RGB.
GNU General Public License v3.0
37 stars 6 forks source link

row offset issues when testing on Arduino R4 Minima #22

Closed ludicrousdisplay closed 3 months ago

ludicrousdisplay commented 3 months ago

Hello, thanks for making this available. I am testing this out (version 2.3.1) with an Arduino R4 Minima and Waveshare RGB LED matrix (https://www.waveshare.com/wiki/RGB-Matrix-P2.5-64x32).

When I run the drawing example the diagonal line is broken into multiple line segments, with some segments up or down 4 pixels from where they should be relative to the starting segment. I am wondering if you can suggest a starting point for me to track down the issue.

CamelCaseName commented 3 months ago

Hi,

this could very well be a wiring issue where the C and D pins are flipped

I'll also try my r4 minima later today to test as well

ludicrousdisplay commented 3 months ago

Cool thanks it works now! I swapped the C and D pins as you suggested.

C now connects to 13 and D now connects to 10. Although I don't know if the Waveshare matrix has their C and D pins flipped and mislabeled or the R4 minima spec is changed. If you test on yours that might provide an answer.

CamelCaseName commented 3 months ago

Glad to hear you got it fixed that easily!

I'll go ahead and close this issue then, but this weekend I planned on doing some more work on the library so investigating this bit firs perfectly as a start :)

Once I determine the reason I'll update the readme and instructions. Thanks for reporting the issue!

CamelCaseName commented 3 months ago

It was literally a typo in the readme... fixed now