pic24fj128ga202 uart issues. [Solved]

temtronic · Posted: Sun Jan 24, 2021 7:50 am

When doing ANY 'serial' communications, I always connect to a PC with Realterm to verify the PIC can send and receive data as expected BEFORE connecting the 'other' serial device.
This basic test is done after the '1Hz LED' program has verified the PIC does run...

Ttelmah · Joined: 11 Mar 2010 Posts: 19221

The B4 one is almost certainly that you need the fuse SOSC_DIG. Needed
if you want to use the SOSC pins for normal I/O. This affects A4 as well.

There is nothing at all stopping B6 from being a normal I/O pin. Are you
sure there is not a connection problem (short on the pin or something has
applied a voltage to it it cannot take). There is nothing at all about that chip
stopping B6 from working. Many other people here have used them fine.
I've got three of the FJ64's running here at the moment...

Check the fuses the code is generating. Check that it isn't defaulting to
ICS 01. If this is happening, B6, is PGC3, and this has priority over every
other function.