Handling of INT_UART1E interrupt [CLOSED]

[benoitstjean]

Device: PIC24EP512GP806
Compiler: 5.026

Hi guys.

Very (very) rarely, the INT_UART1E interrupt is triggered. Don't know when and don't know what causes it and unless I'm not seeing this right, I can't seem to find much info in the full spec sheets or extra specs "Section 17. UART" document. In the full specs, it is referred-to as <U1E – UART1 Error Interrupt> but can't find any much more info.

But when that error happens, it seems that the MCU doesn't process anything afterwards and is stuck there.

In the interrupt routine, I print the status of the following registers and they seem fine but they always seem to have the same values so maybe I should print others?

[Ttelmah]

Framing error probably.
You have to read the character. The error clears itself when a character
is read. Untill it is cleared it'll stay set.

[benoitstjean]

So in the INT_UART1E interrupt, should I just do a blind getc( UART )?

[Ttelmah]

Yes, the UART errors all 'attach' to the character currently at the top
of the buffer. So when this is read the errors disappear with it (unless there
are multiple errors).

[benoitstjean]

Ok thanks. In the interrupt routine, I've added a simple if( kbhit()) getc();

Ben