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title "PIC10F202 counting program"
list p=10f202
#include
__CONFIG _CP_OFF & _MCLRE_OFF & _WDT_OFF & _IntRC_OSC
cpt1 equ 0x08
cpt2 equ 0x09
cpt3 equ 0x0A
org 00h ;reset vector
andlw 0xfe
movwf OSCCAL
clrf GPIO
movlw 0x0b
tris GPIO
movlw 0xc0
option
IncCount
call Delay1s
btfsc GPIO,2
goto next
bsf GPIO,2
goto IncCount
next
bcf GPIO,2
goto IncCount ;loop
;------------------------------------------------
Delay1ms ;2us for CALL
movlw 0xF9
movwf cpt1 ;2us
etiq2
nop ;loop=4us*(0xF9=249)=996us
decfsz cpt1,F
goto etiq2
retlw 0x00
;------------------------------------------------
Delay1s
movlw 0x0A
movwf cpt3
etiq4
movlw 0x64
movwf cpt2
etiq3
call Delay1ms
decfsz cpt2,F
goto etiq3
decfsz cpt3,F
goto etiq4
retlw 0x00
end
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