USART interrupt not interrupting :-(

Hi,

I've been testing out the USART on my 16F76 by writing a simple echo server. I started off with:


DEFINE OSC 4
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 2400
DEFINE HSER_ CLROERR 1

serial var byte

main:
HSerin [serial]
Hserout [serial]
GoTo main


This worked absolutely fine. I then tried to add interrupts to the program:

DEFINE OSC 4
DEFINE HSER_RCSTA 90h
DEFINE HSER_TXSTA 20h
DEFINE HSER_BAUD 2400
DEFINE HSER_ CLROERR 1


init:
PIE1.5=1 'Enable USART RX interrupts
INTCON.6=1
INTCON.7=1


on interrupt goto handler
main:
'Main loop, does absolutely nothing for the moment
GoTo main

DIsable
handler:
HSerin [serial]
Hserout [serial]

resume
enable

This ought to behave in exactly the same way, except that it doesn't work at all. Have I forgotten to set a needed register to enable interrupts or something ...?


Ben

Arg! Both the code samnpoles above work perfectly! My problem was with solderus badus on my part! It was pure chance that it worked whenever I loaded one code in, but not the other. My Iron is warming as I speak(write) .... :-)