汇编写的LCD1602数字时钟调不出来，一直显示白屏，用C语言写 的就没有问题很好用，两种代码都贴出来，求指正汇编写的问题出在那里好多天了
汇编的代码
;中断控制定时 1602屏显数字电子时钟
RS bit P2.6
RW bit P2.5
E bit P2.7
LCD EQU P0
SECOND EQU 60H ;秒数存储
MINUTE EQU 61H ;份钟存储
HOUR EQU 62H ;小时存储
ORG 0000H
AJMP INIT_LCD ;初始化
ORG 000BH
AJMP TIME0 ;中断入口
ORG 0030H
MIAN:
AJMP MIAN
INIT_LCD:
MOV B,#10
MOV SECOND,#0
MOV MINUTE,#0
MOV HOUR,#12 ;12小时
MOV TMOD,00000001B
MOV TH0,#3CH
MOV TL0,#0B0H
SETB ET0
SETB EA
SETB TR0
;MOV TCON,#00010000B ;开启计时
MOV LCD,#00111000B
ACALL WR_COMM
MOV LCD,#00001110B
ACALL WR_COMM
MOV LCD,#00000100B ;当读或写一个字符后地址指纹减1
ACALL WR_COMM
MOV LCD,#00000001B
ACALL WR_COMM
MOV LCD,#87H ;液晶屏第一行第8个字位
ACALL WR_COMM
MOV A,HOUR
DIV AB
MOV LCD,A
ACALL WR_DATA
MOV LCD,B
ACALL WR_DATA
MOV A,MINUTE
DIV AB
MOV LCD,A
ACALL WR_DATA
MOV LCD,B
ACALL WR_DATA
MOV A,SECOND
DIV AB
MOV LCD,A
ACALL WR_DATA
MOV LCD,B
ACALL WR_DATA
MOV LCD,#47H ; 液晶屏第二行第8个字位
ACALL WR_COMM
;MOV LCD,#'0'
;ACALL WR_COMM
RET
TIME0:
PUSH ACC
MOV R1,#20 ;定时1秒
DJNZ R1,JIXU
INC SECOND ;秒数
MOV A,SECOND
MOV R2,SECOND
DIV AB
MOV LCD,B
ACALL WR_DATA
MOV LCD,A
ACALL WR_DATA
MOV LCD,#':'
ACALL WR_DATA
CJNE R2,#60,JIXU
MOV SECOND,#0
INC MINUTE ;分钟
MOV A,MINUTE
MOV R2,MINUTE
DIV AB
MOV LCD,B
ACALL WR_DATA
MOV LCD,A
ACALL WR_DATA
MOV LCD,#':'
ACALL WR_DATA
CJNE R2,#60,JIXU
MOV MINUTE,#0
INC HOUR ;小时
MOV A,HOUR
MOV R2,HOUR
DIV AB
MOV LCD,B
ACALL WR_DATA
MOV LCD,A
ACALL WR_DATA
CJNE R2,#24,JIXU
MOV HOUR,#0
JIXU: ;中断延时
POP ACC
MOV TH0,#3CH
MOV TL0,#0B0H
RETI
WR_COMM: ;写指令
CLR RS
CLR RW
CLR E
ACALL CHECK_BF
;ACALL DLY1
SETB E
;ACALL DLY1
CLR E
RET
WR_DATA: ;写数据
SETB RS
CLR RW
CLR E
ACALL CHECK_BF
;ACALL DLY1
SETB E
;ACALL DLY1
;CLR E
RET
CHECK_BF: ;判断忙子程序
MOV LCD,#0FFH
CLR RS
SETB RW
CLR E
NOP
SETB E
JB LCD.7,CHECK_BF
RET
DLY1S:MOV R5,#1 ;cpu延时
DLY1:MOV R6,#100
DLY2:MOV R7,#100
DJNZ R7,$
DJNZ R6,DLY2
; DJNZ R5,DLY1
RET
END
C语言写的没问题很好用
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit rs=P2^6;
sbit rw=P2^5;
sbit lcden=P2^7;
//LCD EQU P0
uchar code table[]=" 2016-7-26 MON";
uchar code table1[]=" 23:59:00";
uint count,shi,fen,miao;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--) ;
}
void write_com(uchar com)
{
rs=0;
rw=0;
lcden=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1;
rw=0;
lcden=0;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init()
{
uchar num;
lcden=0; //自己加的
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<15;num++)
{
write_date(table[num]);
delay(5);
}
write_com(0x80+0x40);
for(num=0;num<12;num++)
{
write_date(table1[num]);
delay(5);
}
TMOD=0X01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0X80+0x40+add);
write_date(0x30+shi); //这里解释了为什么在上面加上23:59:00
write_date(0x30+ge);
}
void main()
{
init();
while(1)
{
if(count==20) //定时1秒种
{
count=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(4,shi);
}
write_sfm(7,fen);
}
write_sfm(10,miao);
}
}
//while(1);
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;
}
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