8. TMR0 설정하기.

내부 TMR0 설정하기

START_TMR0_2US
 MOVLW B'00000000' ;TMR0 PRE(1:2)타이머0를2분주(4MHz=0.25US,*4CLK,*2분주=2US)
 GOTO START_TMR0_INIT
START_TMR0_4US
 MOVLW B'00000001' ;TMR0 PRE(1:4)타이머0를4분주(4MHz=0.25US,*4CLK,*4분주=4US)
 GOTO START_TMR0_INIT
START_TMR0_8US
 MOVLW B'00000010' ;TMR0 PRE(1:8)타이머0를8분주(4MHz=0.25US,*4CLK,*8분주=8US)
 GOTO START_TMR0_INIT
START_TMR0_16US
 MOVLW B'00000011' ;TMR0 PRE(1:16)타이머0를16분주(4MHz=0.25US,*4CLK,*16분주=16US)
 GOTO START_TMR0_INIT
START_TMR0_32US
 MOVLW B'00000100' ;TMR0 PRE(1:32)타이머0를32분주(4MHz=0.25US,*4CLK,*32분주=32US)
 GOTO START_TMR0_INIT
START_TMR0_128US
 MOVLW B'00000110' ;TMR0 PRE(1:128)타이머0를128분주(4MHz=0.25US,*4CLK,*128분주=128US)
 GOTO START_TMR0_INIT
START_TMR0_256US
 MOVLW B'00000111' ;TMR0 PRE(1:256)타이머0를256 분주(4MHz=0.25US,*4CLK,*256분주=256US)
START_TMR0_INIT
 SELBANK1
 MOVWF OPTIONR
 SELBANK0
 BCF  INTCON,T0IF
 CLRF TMR0
 BCF  INTCON,GIE;전체INT사용중지
 BCF  INTCON,T0IE;T0INT사용중지
 RETURN