Can anyone explain in detail how the digitalWrite works. ie. how long does it take, how indirect it is in comparison to port writes and most importantly will /can it leave a port or port pin or DDR in an unknown state if interrupted. My data stream, all generated in timer interrupt seems to be affec…

DigitalWrite during interrupts

Forum 2005-2010 (read only) General Frequently-Asked Questions

Coding_Badly February 6, 2010, 8:05am 8

As far as I can tell the digitalWrite provided with the Teensy libraries is (mostly) atomic. The code in digitalWrite that turns off PWM is not atomic in either library.

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DigitalWrite during interrupts

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