I found a serial bit bang program using direct port manipulation which won't compile - code attached below. It complains that PORTB is undeclared. I created a new sketch and included the softUart.h at the top. I also found a version of 'blink' using direct port manipulation which compiles just fine…

error 'PORTB' undeclared

AlbertHall May 28, 2018, 1:52pm 7

Danois90:
The blink code does probably not access PORTB via a #define. Your code would have worked if you had accessed PORTB directly

Aha, correct again.
Thanks.

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