interrupt the 240ac power line by using the pin rb0/int(zero crossing detector) of pi

[skimask]

thanx.actually,u has help me a lot.one more thing...can i compile the coding using microcode studio basic pro???

What 'coding'?

[texas5]

nothing.sory.hehe.i've tested my hardware today.it's work man.thanx to you.i modify the above code into:

DEFINE OSC 8
TRISA.1=0
TRISA.2=0

MAIN:

INTCON.4 = 1 ;enable RB0/INT interrupts
INTCON.7 = 1 ;enable all un-masked interrupts

if INTCON.1 = 1 Then ;RB0/INT interrupts occured
goto EDGE
ENDIF

EDGE:

IF OPTION_REG.6=1 then ;interrupt on rising edge
LOW PORTA.1
else
OPTION_REG.6=0 ;interrupt on falling edge
LOW PORTA.2
endif

GOTO MAIN

thanx once again...