Return in ISR -- AVR Reset ??

Jogi864 · Joined: 05 Oct 2010 Posts: 2

Hi Bascom Users,

I have a question. I have connect a 12er Keypad on Port A on a Atmel 1284P.
All connections goes over a Resistor 470R on every Line.
Row 1= A1, Row2 = A2.... Col1=A5, Col2= A6...and so on.
i use PCINT to for Interrupt.

Here is the Code what is not working. It seems that the Avr do a Reset when he comes to the "Return" who is in the If.. then.. circle in the ISR (ok sorry for my bad English)

MWS · Joined: 22 Aug 2009 Posts: 2335

Look up the help for "On Interrupt", it will give you the answer.

i.dobson · Posted: Sat Dec 13, 2014 9:51 am Post subject:

Hello,

Simply put you have Return within an if, the Compiler will only use a RETI (Return from Interrupt) for the first return that it sees outside conditions.

So modify your code to use IF,ELSE,ENDIF,RETURN

Regards
Ian Dobson

Visovian · Joined: 31 Oct 2007 Posts: 584 Location: Czech

I would try: