大家好
請問一下 如果要以按鈕的次數來儲存所需要的時間 要如何撰寫 例如每按一次按鈕增加十秒鐘 然後在輸出來控制LED
謝謝

我的程式如下
list p=16F873a
#include <p16f873a.inc> ; Include file locate at defult directory
;#define RA4 PORTA,4

VAL_500uS equ .250 ; 0.5ms delay value
VAL_1s equ .200 ; 10mS delay value
count_1m equ 0x22
count_5s equ 0x23
count_1s equ 0x24
count_us equ 0x25
Reg_time equ 0x26

;********************************************


;*********************************************
org 0x00
nop
initial:


banksel ADCON1 movlw b'11000110'
movwf ADCON1

banksel CMCON movlw b'00000111'
movwf CMCON
movlw b'00110000'
movwf TRISA

banksel TRISB ;定義TRISB設定PORTB為輸出模式
clrf TRISB

banksel PORTB
clrf PORTB



;***********************************************
Main
;***********************************************
start:
clrf Reg_time
movlw b'11111111' ;LED初始狀態
movwf PORTB
movlw .10
movwf Reg_time


;--------------------------------------------------------

key_time:
btfsc PORTA,4
goto add_time
btfsc PORTA,5
goto enter_mode
goto key_time

add_time:
movlw .10
addwf Reg_time,1
;goto key_enter
goto key_time

key_enter:
btfsc PORTA,5
goto key_time
;goto key_enter
goto enter_mode


enter_mode:
call delay_1s
movlw b'00000000'
movwf PORTB

decfsz Reg_time
goto enter_mode
goto clear_mode
clear_mode:
movlw b'11111111'
movwf PORTB
goto start

;-----------------------延遲1s-------------------------------------------
delay_1s:
movlw VAL_1s
movwf count_1s
loop_1s call delay_0.5ms
decfsz count_1s,F
goto loop_1s
return
;-----------------------延遲0.5ms----------------------------------------
delay_0.5ms:
movlw VAL_500uS
movwf count_us
dec_loop nop
nop`
nop
nop
nop
decfsz count_us,F
goto dec_loop
return
;---------------------------------------------------------------------------

end