Interrupt question

[mister_e]

try this one

INCLUDE "modedefs.bas"
DEFINE LOADER_USED 1
DEFINE OSC 40

TRISB.0 = 1
TRISB.1 = 1
TRISB.2 = 1
TRISB.3 = 0
TRISC.6 = 0

PORTC.6 = 1
DelayLoop var word
value var byte
cw var portB.1
ccw var portB.2
MainLoopStatuLED var PORTB.3

INTCON = %10010000 'Enable all unmasked interrupt, Enable RB0/INT0 Interrupt

on interrupt goto myint
value=0

begin:
     ' Main Loop will blink a led every 0.5 secondes     
     Toggle MainLoopStatusLED
     For delayloop = 1 to 50000
          Pauseus 10 ' using Pauseus to avoid interrupt latency
     Next
     GOTO begin


'Interrupt handler
Disable
myint:
     value = value + cw - ccw
     serout2 portc.6, 16468, [dec3 value,13,10]
     INTCON.1 = 0
     resume
Enable

btw - is there a way to reset the printing using serout2 to the home position?

Are you using a serial LCD???

Try serout2 portc.6, 16468, [254,1,dec3 value,13,10]

Make sure your MCLR pin (PIN1) is attach to 5V with a pull-up resistor. 0.1uF + 47 uF can be installed to your supply line, close to the pic, to avoid nois and glitches.

try to remove all interrupt and test it in the main loop. Is it working without interrupt ?

If nothing is better, can you provide your schematic ??