用回汇编语言编程8个按键控制4个LED灯

发布网友发布时间：2022-05-02 23:37

共1个回答

热心网友时间：2022-06-28 10:17

没有电路图，没法写程序。
比如，按键在P0口与在P3口程序就不一样；
又比如，扫描的键盘与直接连接在Pn口的又不一样。

没有图实在是没法写程序呃

*****************************************************************
假定CPU是用51系列的单片机；
假定键盘直接连接在Pn口，从Pn0~Pn7分别对应键1~键7；
假设LED直接由Pm口驱动，从Pm0~Pm3分别对应Led1~Led4;

在这个前提下，以上的问题可以编程如下：
*****************************************************************
#define KEY1 01h ;定义键1
#define KEY2 02h ;定义键2
#define KEY3 04h ;定义键3
#define KEY4 08h ;定义键4
#define KEY5 10h ;定义键5
#define KEY6 20h ;定义键6
#define KEY7 40h ;定义键7
#define KEY8 80h ;定义键8

#define LED1 Pm0 ;定义灯1
#define LED2 Pm1 ;定义灯2
#define LED3 Pm2 ;定义灯3
#define LED4 Pm3 ;定义灯4

#define LED_ON 1 ;定义亮灯操作
#define LED_OFF 0 ;定义灭灯操作

；延迟4秒子程序
#define Timer4s 1234h ;延迟4秒的参数自己调整
Dly4s: push acc;
mov dptr, #Timer4s;
Dly_2: mov a,dpl;
Dly_1: mov dpl,a;
dec a;

jnz a,Dly_1;
mov dpl,a;
mov a,dph;
dec a;

mov dph,a;

jnz a,Dly_2;
pop acc;

ret;

；******* 主程序 ****************************
main: mov a, Pn;
je a,#KEY1, K1_Pressed;

je a,#KEY2, K2_Pressed;

je a,#KEY3, K3_Pressed;

je a,#KEY4, K4_Pressed;

je a,#KEY5, K5_Pressed;

je a,#KEY6, K6_Pressed;

je a,#KEY7, K7_Pressed;

je a,#KEY8, K8_Pressed;

ljmp main;

K1_Pressed:
mov LED1, LED_ON;
mov LED2, LED_ON;
call Dly4s;

mov LED1, LED_OFF;
mov LED2, LED_OFF;
ljmp main;
K2_Pressed:
mov LED3, LED_ON;
mov LED4, LED_ON;
call Dly4s;

mov LED3, LED_OFF;
mov LED4, LED_OFF;
ljmp main;
K3_Pressed:
mov LED1, LED_ON;
call Dly4s;

mov LED1, LED_OFF;
mov LED2, LED_ON;
call Dly4s;

mov LED2, LED_OFF;

ljmp main;
K4_Pressed:
mov LED3, LED_ON;
call Dly4s;

mov LED3, LED_OFF;
mov LED4, LED_ON;
call Dly4s;

mov LED4, LED_OFF;

ljmp main;
K5_Pressed:
mov LED1, LED_ON;
mov LED2, LED_ON;
call Dly4s;

mov LED1, LED_OFF;
mov LED2, LED_OFF;
ljmp main;
K6_Pressed:
mov LED3, LED_ON;
mov LED4, LED_ON;
call Dly4s;

mov LED3, LED_OFF;
mov LED4, LED_OFF;
ljmp main;
K7_Pressed:
mov LED1, LED_ON;
call Dly4s;

mov LED1, LED_OFF;
mov LED2, LED_ON;
call Dly4s;

mov LED2, LED_OFF;

ljmp main;
K8_Pressed:
mov LED3, LED_ON;
call Dly4s;

mov LED3, LED_OFF;
mov LED4, LED_ON;
call Dly4s;

mov LED4, LED_OFF;

ljmp main;