;路標(biāo)導(dǎo)向燈,TMR2學(xué)習(xí)
;07/09/05
;*******定義寄存器***********
pcl equ 2h
status equ 3h
intcon equ 0bh
tmr2 equ 11h
pir1 equ 0ch
pie1 equ 8Ch
t2con equ 12h
pr2 equ 92h
portc equ 7h
trisc equ 87h
rp0 equ 5h
z equ 2h
pr2b equ d'250'
count equ 20h
w_back equ 22h
;*******主程序***************
org 0000h
nop
main
bsf status,rp0
movlw 00h
movwf trisc
movlw pr2b
movwf pr2
bcf status,rp0
movlw 7bh
movwf t2con
clrf count
loop
movf count,0
call read
movwf portc
incf count
movlw .15
subwf count,0
btfsc status,z
clrf count
call delay
call delay
call delay
call delay
goto loop
;*****TMR2硬件延時程序**********
delay
bcf pir1,1
bsf t2con,2
loop1
btfss pir1,1
goto loop1
return
;*****讀取顯示信息的查表程序******
read
addwf pcl
retlw b'00000001'
retlw b'00000011'
retlw b'00000111'
retlw b'00001111'
retlw b'00011111'
retlw b'00111111'
retlw b'01111111'
retlw b'11111111'
retlw b'00000000'
retlw b'11111111'
retlw b'00000000'
retlw b'11111111'
retlw b'00000000'
retlw b'11111111'
retlw b'00000000'
end
TMR2定時器,硬件電路定時, |
|
66821730(技術(shù)支持)
