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olikraus / u8g2

U8glib library for monochrome displays, version 2
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U8G2 and timer interrupts #2267

Closed robmaxtech closed 1 year ago

robmaxtech commented 1 year ago

I'm using U8G2 on an AVR128DB48 with an 128x32 OLED; works excellent! But one question is open for me: I'm using a timer interrupt for audio playback which works fine and without interfering any UI functionality; but updating the display blocks the timer interrupt obviously. Does the U8G2 lib disables interrupts or something similar? I couldn't find anything in the code, but I'd like to understand why the timer interrupt routine is affected. Thanks a lot!

olikraus commented 1 year ago

U8g2 doesn't touch or modify interrupts.

robmaxtech commented 1 year ago

Ok, thanks; good to know! So I know I don't have to suspect U8G2 any more ;-) It's such a great library!

olikraus commented 1 year ago

Of course U8g2 will use SPI or Wire interface as implemented by the Arduino Environment. Those low level communication procedures may use interrupts.