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洗衣机控制系统程序如下：

***必要的变量定义及声明***

#include <reg52.h>

#define LCD P0                          //定义单片机P0口为LCD数据输入专用口

sbit E = P2^7;                                         //定义P2.7为LCD使能信号输入端

sbit RW = P2^5;                                 //定义P2.6为LCD读/写命令输入引脚

sbit RS = P2^6;                                  //定义P2.5为LCD数据/命令输入引脚

sbit psk0 = P2^0;                                                                                         //开始键

sbit psk1 = P2^1;                                                                                          //暂停键

sbit psk2 = P2^2;                                                                                          //结束键

sbit psk3 = P2^3;                                                                //蜂鸣器启停控制引脚

unsigned char i = 0,j = 0;

unsigned int count = 0,counter = 0;            //T0计数值count，T1计数值counter

unsigned int res_time = 0,wash_mode = 0;

unsigned char show_time[] = "00:00:00";            //定义LCD初始化显示值

unsigned char show_mode[] = "0";

unsigned char mode[] =                    //11个按键分别按下时所对应的P3口数值

{0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

unsigned char array[8] = {1,2,3,15,30,45,60,90}; //为wash_mode、res_time赋值

***洗衣机定时，T0中断子程序***

TTT() interrupt 1                                            //T0每秒请求中断，显示时间-1s

{

       TH0=(65536-50000)/256;

       TL0=(65536-50000)%256;

       count++;

       if(count == 150)

       {

              res_time--;

              Display(1);

              count=0;

              if(res_time ==0)                //洗涤完成，关闭T0，开启T1，蜂鸣器响起

              {

                     TR0 = 0;

                     psk3 = 1;

                     counter = 0;

                     TH1 = (65536-50000) / 256;

                     TL1 = (65536-50000) % 256;

                     TR1 = 1;

              }

        }

}

***蜂鸣器报警定时，T1中断子程序***

SSS() interrupt 3                                 //蜂鸣器报警结束，关闭T1，关闭蜂鸣器

{

       TH1 = (65536-50000) / 256;

       TL1 = (65536-50000) % 256;

       counter++;

       if(counter == 1500)

       {