Quote Originally Posted by MadAl View Post
I use HSEROUT on port C6 (the hardware Tx pin) and all works fine.
However when I issue a SEROUT2 command on that pin, the pin remains silent (no activity on that pin using the oscilloscope). The very same SEROUT2 command on port A1 gives activity on the scope screen.
I assume the same applies to the SERIN2 on port C7.
What am I missing here?
If the port is still set up to use the hardware serial port, SERIN/SEROUT won't work. The port has to be set up for normal, general purpose I/O to work with SERIN/SEROUT.