基于单片机实现的数字钟

基于单片机实现的数字钟 org 0000h jmp start org 0bh jmp tim0 start: mov sp,#70h mov 24h,#0ffh mov 23h,#0ffh mov 22h,#0ffh mov 21h,#0ffh mov 2ch,#00 mov 2bh,#00 mov 2ah,#12 mov tmod,#01h mov th0,#(65536-10000)/256 mov tl0,#(65536-10000)mod 256 mov ie,#10000010b mov r4,#170 mov dptr ,#0ffech setb tr0 loop: jb p3.5, n2 call delay clr p1.7 mov a,2bh add a,#01h mov 2bh,a cjne a,#60,n1 mov 2bh,#00 n1: jnb p3.5,$ setb p1.7 call delay n2: jb p3.4,n4 call delay clr p1.0 mov a,2ah add a,#01h mov 2ah,a cjne a,#24,n3 mov 2ah,#00 n3: jnb p3.4,$ setb p1.0 call delay n4: jmp loop tim0: setb p1.4 mov th0,#(65536-10000)/256 mov tl0,#(65536-10000)mod 256 push acc push psw djnz r4,x2 mov r4,170 call clock call disp x2: call x3 pop psw pop acc reti x3: mov dptr,#0ffefh mov a,21h movx @dptr,a mov dptr,#0ffeeh mov a,22h movx @dptr,a mov dptr,#0ffedh mov a,23h movx @dptr,a mov dptr,#0ffech mov a,24h movx @dptr,a ret clock: mov a,2ch add a,#1 mov 2ch,a