考试的时候千万不要着急，一步一步来，不到最后一刻千万不要放弃，加油，你也一定可以的！
目录
中断3个程序
第一个程序
ORG 0000H
RESET: AJMP MAIN
ORG 000BH
AJMP IT0P
MAIN: MOV SP, #60H;
MOV TMOD, #01;
ACALL PT0M0;
HRER: AJMP HERE
PT0M0: MOV TL0, #0CH
MOV TH0, #0FEH
SETB ET0;
SETB EA;
SETB TR0;
RET
IT0P: MOV TL0, #0CH
MOV TH0, #0FEH
CPL P1.0;
RETI;
第二个程序
ORG 0000H
RESET: AJMP MAIN
ORG 000BH
AJMP IT0P
ORG 0100H
MAIN: MOV SP, #60H
MOV B, 0AH
ACALL PT0M0
HERE: AJMP HERE
PT0M0: MOV TMOD, #01H
MOV TL0, #
MOV TH0, #
SETB ET0
SETB EA
SETB TR0
RET
IT0P: MOV TL0,#
MOV TH0,#
JNZ B, LOOP
RTURN: RETI
第三个程序
ORG 0000H
RESET: AJMP MAIN
ORG 000BH
AJMP IT0P
ORG 001BH
AJMP IT1P
ORG 1000H
MAIN: MOV SP, #60H
ACALL PT0M2
LOOP: MOV C, F0
JNC LOOP
HERE: AJMP HERE
PT0M0: MOV TMOD, #25H
MOV TL0, #FFH
MOV TH0, #FFH
SETB ET0
MOV TL1, #06H
MOV TH1, #06H
CLR F0
SETB EA
SETB TR0
RET
IT0P: CLR TR0
SETB F0
RETI
IT1P: CPL P1.0
RETI
DA转换
Triangle
ORG 0100H
START: MOV R0, #0FEH
MOV A, #00H
LOOP: MOVX @R0, A
INC A
JNZ LOOP
Triangle2
ORG 0100H
START: MOV R0, #0FEH
MOV A, #00H
UP: MOVX @R0, A
INC A
JNZ UP
DOWN: DEC A
MOVX @R0, A
JNZ DOWN
AJMP UP
矩形波
ORG 0100H
START: MOV R0, #0FEH
MOV A, #data1
MOVX @R0, A
ACALL DELAY1
MOV A, #data2
MOVX @R0, A
ACALL DELAY2
显示/键盘：
数码管的动态显示（C语言实现）：
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
#define DigW P1 //设置P1口为位选口（选择第几位的）
#define DigD P2 //P2为段选，（选择数码管的哪段亮起来的）
uchar show[] = {
5, 2, 0, 1, 3, 1, 4};
uchar DigT[] = {
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,
0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71}; //共阴极数码管0~9,a-f段码表
/**************************延时函数*************************/
void delay() {
uint j;
for (j = 0; j < 150; j++);
}
/**************************主函数*************************/
void main(void) {
Dig_W = 0x00;//关数码管
Dig_D = 0x00;
while (1) {
uchar temp = 0x80;
for (uchar i = 0; i < 7; i++) {
Dig_W = tmep;
Dig_D = DigT[show[i]+1];
delay();
temp = temp >> 1;
}
}
}
矩阵键盘（C语言实现）
#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
#define Dig_W P1
#define Dig_D P2
#define io_KEY P3
uchar key_T[] = {
0xee, 0xde, 0xbe, 0x7e,
0xed, 0xdd, 0xbd, 0x7d,
0xeb, 0xdb, 0xbb, 0x7b,
0xe7, 0xd7, 0xb7, 0x77}; //按键值
uchar dis_T[] = {
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f,
0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71}; //共阴极数码管0~9,a-f段码表
uchar zhi = 0;
/**************************延时函数*************************/
void d_ms()
{
uint j;
for(j=0;j<150;j++);
}
/**************************显示函数*************************/
void display(uchar num) {
uchar i, temp;
temp = 0x80;
Dig_W = temp;
Dig_D = dis_T[num];
temp = temp >> 1;
}
uint Scanner() {
int 列 = 0, 行 = 0, 按键 = 0, a;
io_KEY = 0xf0; //P2口后4位置高电平前4位置低电平，当有按键按下时确定列数
while (io_KEY == 0xf0); //判断P2口是否有信号输入
列 = io_KEY; //保存列数
delay();
io_KEY = 0x0f; //P2口后4位置低电平前4位置高电平，当有按键按下时确定行数
while (io_KEY == 0x0f); //判断P2口是否有信号输入
行 = io_KEY; //保存行数
按键 = 列 | 行;
return 按键;
}
/**************************主函数*************************/
void main(void) {
uint KeyV = 0;
Dig_W = 0x00;//关数码管
Dig_D = 0x00;
while (1) {
KeyV = Scanner(); //得到按键值
for (int i = 0; i < 16; i++)//判断按键值
{
if (key_T[i] == KeyV) {
zhi = i;
break;
}
}
display(zhi);
}
}
加法、乘法
MOV R0,#60H
MOV R2,#10H
CLR A
TU: MOV @R0,A
INC R0
INC A
DJNZ R2,TU
MOV R0, #60H
MOV R1, #70H
MOV R2, #10H
TT: MOV A,@R0
MOV @R1,A
INC R0
INC R1
DJNZ R2,TT
RET
END
第二个例程
MOV 70H, #12H
MOV 71H, #90H
MOV 72H, #78H
MOV 60H, #56H
MOV 61H, #34H
MOV 62H, #12H
MOV R0,#70H
MOV R1,#60H
MOV R2,#03H
CLR CY
LOOP:MOV A,@R0
ADDC A,@R1
DA A
MOV @R1,A
INC R0
INC R1
DJNZ R3,LOOP
END
例程
MOV 30H,#45H
LOOP: MOV A,30H
SWAP A
ANL A,#0FH
MOV 31H,A
MOV A,30H
ANL A,#0FH
MOV 32H,A
END
MOV 32H,#98H
MOV 31H,#76H
MOV 30H,#54H
MOV R2,#04H
LOOP: CLR CY
MOV A,30H
RLC A
MOV 30H,A
MOV A,31H
RLC A
MOV 31H,A
MOV A,32H
RLC A
MOV 32H,A
DJNZ R2,LOOP
RET
END
例程
ORG 0000H
START: MOV R0,#60H
MOV DPTR,#QW1
MOV R5,#0
MOV R7,#10H
LOOP: MOV A,R5
MOVC A,@A+DPTR
MOV @R0,A
INC R0
INC R5
DJNZ R7,LOOP
LJMP QW2
QW1: DB 60H,61H,62H,63H,64H,65H,66H,67H
DB 68H,69H,6AH,6BH,6CH,6DH,6EH,6FH
QW2:MOV R0,#60H
MOV R1,#70H
MOV R5,#0FH