It's been a while since I last worked on my bot and I'm stuck with trying to get the TMR0 interrupt to handle the stepper pulse. The thing is...the interrupt isn't happening. Can you spot why?
Code:
Interrupt org 0x04 ; interrupt vector
movwf W_TEMP ;
swapf STATUS,W
movwf S_TEMP
bcf STATUS,RP0
Disable_Int
bcf INTCON,GIE ;
btfsc INTCON,T0IF ;
goto Step ;
; btfsc PIR1,TMR2IF ;
; goto Left_Step ;
Pop
swapf S_TEMP,W ;
movwf STATUS
swapf W_TEMP,f
swapf W_TEMP,w
retfie
;****The main program*****
#include "Bot.inc"
Start
CLRF PORTA ; Initialize Port A
CLRF PORTB ; Initialize Port B
CLRF PORTC ; Initialize Port C
CLRW
BANK1 ; Select Register Bank 1
MOVWF TRISB ; Set B to all outputs for stepper control
BANK0
CLRF TMR0 ; Clear Timer0 register
CLRF INTCON ; Disable interrupts and clear T0IF
BANK1
MOVLW 0xC7 ; PortB pull-ups are disabled,
MOVWF OPTION_REG ; Interrupt on rising edge of RB0
; Timer0 increment from internal clock
; with a prescaler of 1:256.
BANK0
BSF INTCON, T0IE ; Enable Timer0 Interrupts
BSF INTCON, GIE ; Enable all interrupts
BSF INTCON, PEIE
9th February 2006, 05:02 PM
code debugging 
Linear Mode
