#include        "mk7a20p.inc"
;--------------------------------------
;芯片型號(hào)(mk7a20p)
;--------------------------------------
;配置寄存器設(shè)置說明(config)
;1---------FOSE=NS                      ;LS,NS,HS,RC
;2---------WDTE=Disable                 ;Enable,Disable
;3---------CPT=OFF                      ;ON,OFF
;4---------LV=2V                        ;4V,2V,Don't Use
;5---------RTCEN=Timer input only       ;Timer input only,PA4 input
;6---------TYPE=has no wakeup function  ;has wakeup function,has no wakeup function
;--------------------------------------
tm_r0           equ     0x08
tm_r1           equ     0x09
dis_r           equ     0x0a    ;按鍵次數(shù)

                org     0x7ff   ;mk7a20p的復(fù)位向量地址定義
                lgoto   main    ;跳轉(zhuǎn)到主程序入口
                
                org     0x000
led_table
                add     pc,m
                retla   b'00000001'
                retla   b'00000010'
                retla   b'00000100'
                retla   b'00001000'
                retla   b'00010000'
                retla   b'00100000'
                retla   b'01000000'
                retla   b'10000000'

                org     0x100   ;主程序入口地址定義
main
                ;PortA端口
                movla   b'11111111'
                iodir   porta
                ;--------------------------------
                ;PortB端口
                movla   b'00000000'
                iodir   portb
                ;--------------------------------
                ;配置TMR0,預(yù)分頻比為1:8
                ;TMR0初值為0
                movla   b'00000010'
                select
                clr     tmr0
                ;--------------------------------
                ;RAM初始化
                clr     tm_r0
                clr     tm_r1
                ;--------------------------------
                btss    status,pd
                lgoto   display
                ;--------------------------------
into_sleep
                clr     portb
                clr     porta
                clr     dis_r
                sleep
                nop
                nop
                nop
                ;--------------------------------
display
                ;根據(jù)按鍵的次數(shù)
                ;查表LED該顯示的數(shù)據(jù)
                ;并送顯示
                mov     dis_r,a
                lcall   led_table
                movam   portb
                ;--------------------------------
                ;累計(jì)按鍵按下的次數(shù)
                inc     dis_r,m
                movla   .8
                sub     dis_r,a
                btsc    status,c
                clr     dis_r
                ;--------------------------------
wait
                ;2分鐘定時(shí)
                movla   .250
                xor     tmr0,a
                btss    status,z
                lgoto   wait
                clr     tmr0
                
                inc     tm_r0,m
                movla   .250
                xor     tm_r0,a
                btss    status,z
                lgoto   wait
                clr     tm_r0
                
                inc     tm_r1,m
                movla   .250
                xor     tm_r1,a
                btss    status,z
                lgoto   wait
                clr     tm_r1
                lgoto   into_sleep
                
                End