Teensy issue on top row.

adafruit / Adafruit_SSD1306

Arduino library for SSD1306 monochrome 128x64 and 128x32 OLEDs

http://www.adafruit.com/category/63_98

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Teensy issue on top row. #267

Closed fedekrum closed 1 year ago

fedekrum commented 1 year ago

Hi, I am not sure why but after a while of running a sketch the top row acts as the bottom row. Here you have a video. Executing the demo file on the examples is enough to get this issue. This issue is being discussed deeply on https://forum.pjrc.com/threads/73161-Adafruit-SSD1306-lib-top-row-behaves-as-bottom-row-after-a-while.

fedekrum commented 1 year ago

The problem was that the Teensy 3.0 has no pull-up resistors. More details at the link above. Thanks to @PaulStoffregen for his investigation and for the Teensy family of boards !!

PaulStoffregen commented 1 year ago

Genuine Adafruit displays have the proper pullup resistors.

This problem was observed on a cheap no-name display.