单片机高手们谁会用汇编语言实现0~99间的计数、暂停、清零程序。对初学者实在是太难了。大神帮帮忙吧! 实现0到99之间的加数和减数功能的代码，谁会，帮解决下，谢谢...
2\u4e2a\u6570\u7801\u7ba1\u7528\u6309\u952e\u63a7\u5236\u5355\u7247\u673a\u5b9e\u73b0\u81ea\u52a8\u52a0\u51cf,\u6e05\u96f6\u57280\u201399\u4e4b\u95f4\u663e\u793a\uff0c\u7684\u7a0b\u5e8f\u4e0b\u9762\u8fd9\u4e2a\u521a\u597d\u53ef\u4ee5\uff0c\u53ea\u5c11\u4e00\u4e2a\u51cf\u8ba1\u6570\uff1a
http://zhidao.baidu.com/question/1798279664316263987
\u8fd9\u662f0-99\u7684\u52a01\u663e\u793a\uff0c\u51cf\u6cd5\u53ef\u4ee5\u6548\u4eff\u3002
#include "reg51.h"
#define uchar unsigned char
uchar display_code[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar display_data[8]={0,0,0,0,0,0,0,0};
void delay(void)
{
uchar i;
for(i=250;i>0;i--);
}
void display()
{
uchar i,k;
k=0x80;
for(i=0;i<8;i++)
{
P2=0;
P0=display_code[display_data[i]];
P0=~P0;
P2=k;
k=k>>1;
delay();
}
P2=0;
}
void calc()
{
display_data[7]++;
if(display_data[7]>9)
{
display_data[7]=0;
display_data[6]++;
if(display_data[6]>9)
{
display_data[6]=0;
}
}
}
void main(void)
{
uchar i;
while(1)
{
for(i=0;i<250;i++)
{
display();
}
calc();
}
}
;http://zhidao.baidu.com/question/485975186.html
;0.0 ~ 9.9
;P0, P2静态显示
;设系统晶振为12MHz。
;按键连接在P3.5，
;按一下，计时，再按一下，停止，再按一下，清零。
;---------------------------------------
ORG 0000H
LJMP MAIN
ORG 000BH
LJMP T0_INT
;---------------------------------------
ORG 0100H
INIT: ;初始化
MOV P0, #3FH
MOV P2, #3FH
MOV R1, #0
MOV R2, #0
MOV R3, #20
MOV DPTR, #TAB ;表首址送DPTR
MOV TMOD, #01H
MOV TL0, #(65536 - 5000) MOD 256
MOV TH0, #(55536 - 5000) / 256
CLR TR0
CLR P3.6
RET
;---------------------------------------
MAIN:
CALL INIT
MOV R4, #255
SETB ET0
SETB EA
;---------------------------------------
M_LOOP:
JB P3.5, M_LOOP
CALL DLY
JB P3.5, M_LOOP
JNB P3.5, $
INC R4
CJNE R4, #3, M1
MOV R4, #0
M1: CJNE R4, #2, M2
CALL INIT
SJMP M_LOOP
M2: CPL TR0
SJMP M_LOOP
;---------------------------------------
T0_INT:
MOV TL0, #(65536 - 5000) MOD 256
MOV TH0, #(55536 - 5000) / 256
DJNZ R3, T0_E
MOV R3, #20
INC R1
CJNE R1, #10, T0_1
MOV R1, #0
INC R2
CJNE R2, #10, T0_2
MOV R2, #0
MOV P0, #06H
MOV P2, #3FH
SETB P3.6
CLR TR0
MOV R4, #1
RETI
T0_2:
MOV A, R2 ;显示十位
MOVC A, @A + DPTR
SETB ACC.7
MOV P0, A
T0_1:
MOV A, R1 ;显示个位
MOVC A, @A + DPTR
MOV P2, A
T0_E:
RETI
;---------------------------------------
TAB: DB 3FH, 06H, 5BH, 4FH, 66H;0~4
DB 6DH, 7DH, 07H, 7FH, 6FH;5~9
;---------------------------------------
DLY:
MOV R6, #20 ;10ms延时.
D1: MOV R7, #248
DJNZ R7, $
DJNZ R6, D1
RET
;---------------------------------------
END
参考：
http://hi.baidu.com/do_sermon/item/4f921002214f03dbdde5b0c3
ORG 0000H
LJMP MAIN
ORG 000BH
LJMP T0ISR
ORG 0030H
ABLE: ; 共阴极数码管显示代码表
DB 3FH,06H,5BH,4FH,66H ;12345
DB 6DH,7DH,07H,7FH ;6789
MAIN:
MOV SP,#5FH
MOV TMOD,#01H
MOV TH0,#HIGH (65536-50000)
MOV TL0,#LOW (65536-50000)
SETB EA
SETB ET0
MOV R2,#0
LOOP:
JB P3.5,$
LCALL DELAY
JB P3.5,LOOP
JNB P3.5,$
INC R2
LOOP1:
MOV A,R2
JNZ LOOP2
SETB TR0
SJMP LOOP
LOOP2:
DEC A
JNZ LOOP3
CLR TR0
SJMP LOOP
LOOP3:
MOV R2,#0
MOV R3,#0
MOV R4,#0
CLR TR0
SJMP LOOP
DELAY:
MOV R6,#20
DELAY1:
MOV R7,#250
DJNZ R7,$
DJNZ R6,DELAY1
RET
T0ISR:
CLR TR0
MOV TH0,#HIGH (65536-50000)
MOV TL0,#LOW (65536-50000)
SETB TR0
INC R0
MOV A,R0
CJNE A,#20,T0E
MOV R0,#0
INC R1
MOV A,R1
CJNE A,#100,T0ISR1
T0ISR1:
JC,T0ISR2
MOV A,#0
T0ISR2:
MOV B,#10
DIV AB
MOV DPTR,#TAB
MOVC A,@A+DPTR
MOV P0,A
MOV A,B
MOVC A,@A+DPTR
MOV P2,A
T0E:
RETI
END
绛旓細;http://zhidao.baidu.com/question/485975186.html ;0.0 ~ 9.9 ;P0, P2闈欐佹樉绀 ;璁剧郴缁熸櫠鎸负12MHz銆;鎸夐敭杩炴帴鍦≒3.5锛;鎸変竴涓嬶紝璁℃椂锛屽啀鎸変竴涓嬶紝鍋滄锛屽啀鎸変竴涓嬶紝娓呴浂銆;--- ORG 0000H LJMP MAIN ORG 000BH LJMP T0_INT ;--- ORG 0100H INIT: ;鍒濆鍖 MOV ...
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