Simple PIC Interrupt

[uncrocks]

I'm writing a program for a PIC12HV615 to control the power to a computer and properly shut it down based on inputs from the ignition of a car and a momentary button. I'm writing the code in mBasic. Here's what I have so far:

'Raspberry Pi Control
STATE VAR BYTE
STATE = 0
MANOFF VAR BYTE
MANOFF = 0
MANON VAR BYTE
MANON = 0
IGN VAR BYTE
WORKBUT VAR BYTE
WORKBUT = 0
INDEX VAR BYTE
INDEX = 0
TIMER VAR BYTE
TIMER = 0

OUTPUT GP1 'RELAY
RELAY CON GP1
OUTPUT GP2 'SHUTDOWN
SHUTDOWN CON GP2
INPUT GP5 'IGNITION
INPUT GP0 'BUTTON

SLEEP:
	'SLEEP UNTIL GP5 OR GP0 GOES HIGH
	IGN = GP5
	IF IGN = 1 THEN
		MANON = 0
		GOTO POWERON
	ELSE
		BUTTON GP0,1,255,0,WORKBUT,1,SLEEPMANUAL
		PAUSE 20
	ENDIF
	GOTO SLEEP

SLEEPMANUAL:
	MANON = 1
	MANOFF = 0
	GOTO POWERON

ONLOOP:
	INPUT1 = GP5
	IF INPUT1 = 0 AND MANON = 0 THEN
		MANOFF = 0
		MANON = 0
		GOTO POWEROFF
	ELSE
		GOTO BUTTONCHECK
	ENDIF
	IF MANON = 1 AND INDEX < 141 THEN 'LOOP THROUGH .1 SECOND DELAY 142 SETS OF 255 TIMES ABOUT 1 HOUR
		TIMER = TIMER + 1
		IF TIMER = 255 THEN
			TIMER=0
			INDEX = INDEX + 1
		ENDIF
		PAUSE 100
	ELSE IF INDEX = 142
		GOTO POWEROFF
	ENDIF
	GOTO ONLOOP

BUTTONCHECK:
	BUTTON GP0,1,255,0,WORKBUT,1,MANUAL
	PAUSE 20
	GOTO ONLOOP
	
POWERON:
	HIGH RELAY
	LOW SHUTDOWN
	STATE = 1
	IF MANON = 1 THEN
		INDEX = 0
		TIMER = 0		
	ENDIF
	GOTO ONLOOP
	
POWEROFF:
	PAUSE 300000 '5 MINUTES
	IGN = GP5
	IF IGN = 1 THEN GOTO ONLOOP
	HIGH SHUTDOWN
	PAUSE 120000 '2 MINUTES
	LOW RELAY
	LOW SHUTDOWN
	STATE = 0
	INDEX = 0
	TIMER = 0
	IF MANOFF = 0 THEN
		GOTO SLEEP
	ELSE
		GOTO MANLOOP
	ENDIF

MANUAL:
	IF STATE = 1 THEN
		MANOFF = 1
		GOTO POWEROFF
	ELSE
		MANON = 1
		GOTO POWERON
	ENDIF

MANLOOP:
	IGN = GP5
	IF IGN = 1 THEN
		BUTTON GP0,1,255,0,WORKBUT,1,MANUAL
		PAUSE 20
		GOTO MANLOOP
	ELSE
		GOTO SLEEP
	ENDIF

The GP's are the pins (not sure if that's how I should refer to them?)
I have two questions:
1) In the SLEEP subsection, how do I actually make the chip go to sleep until a change occurs on GP0 or GP5 (I know the chip is capable of this).
2) Is a 300000ms pause too many bits? or do I need to loop through a pause of a shorter length?

Thanks in advance!
Also any other suggestions/code clean-ups are welcome

 

[hate]

I don't use basic but does your code actually sleeps the uc or just waits until a change on GPx? If latter, you may put the uc in sleep by using the asm command 'sleep' somehow.