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Use PINx to toggle pins. #27

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timower opened this issue Apr 11, 2020 · 1 comment
Open

Use PINx to toggle pins. #27

timower opened this issue Apr 11, 2020 · 1 comment

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@timower
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timower commented Apr 11, 2020

Currently DirectIO uses a read, flip, write sequence to toggle output pins.
This can be done faster by using the PINx registers (on some targets?).
See section 14.2.2 of the ATMega328 manual:

14.2.2 Toggling the Pin
Writing a logic one to PINxn toggles the value of PORTxn, independent on the value of DDRxn. Note that the SBI instruction can be used to toggle one single bit in a port.
@WestfW
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WestfW commented Oct 26, 2022

Toggle capability is also present in SAM and SAMD

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@WestfW @timower