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Andy4495 / NewhavenOLED

Library for Newhaven OLED displays using US2066 controller chip. Bit-bang SPI implementation allows selection of any Arduino or MSP430 I/O pins to control the display.
MIT License
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Some Characters are Different when using Arduino Uno and Nano Every #3

Closed leonka10 closed 2 months ago

leonka10 commented 3 months ago

Hello, i hope u can help me. When i try the example code on Arduino Uno everything works fine. When I use the exact same Code and Wiring on Arduino Nano Every it works but some Characters are displayed as different Characters. For Example W becomes U and O becomes M. I don't know why and how to fix this.

Andy4495 commented 3 months ago

The higher clock speed of the Every may be causing a timing issue. I don't have an Every to test with, but have some other faster processors that I can try some things. I'll look at the data sheets and confirm the timing specs and see where there might be a problem.

Andy4495 commented 3 months ago

I was unable to reproduce the problem, even when testing with a 120 MHz processor. However, in reviewing the controller chip spec, the library was not quite matching the signaling as described in the spec. I made updates to both the library and example code on the issue_3 branch. I have tested the updated code on an UNO, a 25 MHz MSP430, and a 120 MHz Tiva processor and all appear to work. If you have time, replace your library files with the the attached, and see if that fixes the problem.

NewhavenOLED-issue_3.zip

You can replace the whole library or just the specific files that changed: 

./library.properties
src/NewhavenOLED.cpp
src/NewhavenOLED.h
examples/Newhaven_OLED_example/Newhaven_OLED_example.ino
Andy4495 commented 2 months ago

@leonka10: I have published a new version of the library v1.1.4.

If you have time, please check and see if it fixes your issue. If you continue to have problems, open a new issue and include the sketch and a hookup diagram/photo and I can try to look into it further.