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#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit ad_cs=P1^3; //ADC0832的控制位
sbit ad_clk=P1^0;
sbit ad_dat=P1^1;
sbit lcd_rs=P2^7; //LCD1602的控制位
sbit lcd_e=P2^6;
sbit key1=P1^4; //獨(dú)立按鍵
sbit key2=P3^2;
sbit key3=P3^3;
sbit relay=P1^6; //繼電器
bit flag=1; //工作模式標(biāo)志
bit flag_motor=1; //手動(dòng)模式下，抽水機(jī)開關(guān)標(biāo)志
bit flag_jia=0;
bit flag_jian=0;
uchar Hum_H=60; //自動(dòng)模式下，濕度設(shè)定最大值
uchar Hum_L=30; //自動(dòng)模式下，濕度設(shè)定最小值
uchar num=0;
/********************延時(shí)函數(shù)1ms*****************
void delay_ms(uint a)
{
uint i;
while(a--)
for(i=0;i<125;i++);
}
*************************************/
/*******************延時(shí)函數(shù)50us******************/
void delay_50us(uint a)
{
uint i;
while(a--)
for(i=0;i<19;i++);
}
/*************************************/
/*******************ADC讀取******************/
uchar read_ad(uchar channel)
{
uchar i;
uchar dat1,dat2;
ad_clk=0;
ad_cs=0;
ad_dat=1;
ad_clk=1;
ad_clk=0; //起始信號(hào)
ad_dat=1;
ad_clk=1;
ad_clk=0; //選擇單通道模式
ad_dat=channel;//0對(duì)應(yīng)通道0，1對(duì)應(yīng)通道1
ad_clk=1;
ad_clk=0;
ad_dat=1;
for(i=0;i<8;++i)
{
ad_clk=1;
ad_clk=0;
dat1=dat1<<1;
if(ad_dat)
dat1|=0x01;
}
for(i=0;i<8;i++)
{
dat2=dat2>>1;
if(ad_dat)
dat2|=0x80;
ad_clk=1;
ad_clk=0;
}
ad_cs=1;
return (dat1==dat2)?dat1:0;
}
/*************************************/
/*******************LCD1602初始化******************/
void write_com(uchar com) //寫指令
{
lcd_e=0;
lcd_rs=0;
P0=com;
delay_50us(10);
lcd_e=1;
delay_50us(10);
lcd_e=0;
}
void write_data(uchar dat) //寫數(shù)據(jù)
{
lcd_e=0;
lcd_rs=1;
P0=dat;
delay_50us(10);
lcd_e=1;
delay_50us(10);
lcd_e=0;
}
void init_lcd1602() //lcd 初始化
{
delay_50us(300);
write_com(0x38);
delay_50us(100);
write_com(0x38);
delay_50us(100);
write_com(0x38);
write_com(0x38);
write_com(0x08);
write_com(0x01);
write_com(0x06);
write_com(0x0c);
}
void display_shu(uchar add,uchar dat) //顯示數(shù)字
{
uchar l,m;
// k=dat/100;
l=dat%100/10;
m=dat%10;
write_com(0x80+add);
// write_data(k+0x30);
write_data(l+0x30);
write_data(m+0x30);
}
void display_string(uchar add,uchar *dat) //顯示字符串
{
uchar i;
write_com(0x80+add);
while(dat!=0&&(*dat!='\0')&&i<16)
{
write_data(*dat);
dat++;
i++;
if(i==15) i=0;
}
}
/*****************************************/
/****************主函數(shù)*******************/
void main()
{
EA=1; //開總中斷
EX0=1; //開外部中斷0
EX1=1; //開外部中斷1
IT0=0; //外部中斷0觸發(fā)方式為低電平
IT1=0; //外部中斷1觸發(fā)方式為低電平
init_lcd1602();
display_string(0,"Hum: %"); //實(shí)時(shí)顯示當(dāng)前的濕度
display_string(11,"H: %"); //顯示設(shè)置的濕度最大值
display_string(0x40,"Mode:"); //顯示工作模式
display_string(0x40+11,"L: %"); //顯示設(shè)置的濕度最小值
while(1)
{
uchar i;
i=100-read_ad(0)*0.39;
display_shu(4,i);
display_shu(13,Hum_H);
display_shu(0x40+13,Hum_L);
if(key1==0)
{
delay_50us(100);
if(key1==0)
{
while(!key1);
num++;
if(num>2) num=0;
}
switch (num) //選擇工作模式和調(diào)整濕度設(shè)置最大、最小值
{
case 0:flag=~flag;
flag_jia=0;
flag_jian=0;
//write_com(0x80+0x40);
//write_com(0x0f);
break;
case 1://write_com(0x80+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
flag_jia=1;
flag_jian=0;
break;
case 2://write_com(0x80+0x40+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
flag_jian=1;
flag_jia=0;
break;
}
if(flag==0&&num==1)
{
flag=~flag;
num=0;
flag_jia=0;
flag_jian=0;
}
}
if(flag==0) //手動(dòng)模式
{
display_string(0x40+5,"MT");
if(flag_motor) relay=1;
else if(i<Hum_H) relay=0; //不能超過濕度最大值
else relay=1;
}
else //自動(dòng)模式
{
display_string(0x40+5,"AT");
if(i<(Hum_L+Hum_H)/2) //最大和最小值的平均值作為抽水的判斷條件
{
relay=0;
}
else relay=1;
}
}
}
/********************************************/
/***********************外部中斷*********************/
void int0() interrupt 0
{
delay_50us(20);
if(key2==0)
while(!key2);
flag_motor=~flag_motor;
if(flag&&flag_jia)
{
//write_com(0x80+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
//delay_50us(1000);
Hum_H++;
if(Hum_H>=99) Hum_H=99;
}
if(flag&&flag_jian)
{
//write_com(0x80+0x40+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
//delay_50us(1000);
Hum_L++;
if(Hum_L>=Hum_H) Hum_L=Hum_H-1;
}
}
void int1() interrupt 2
{
delay_50us(20);
if(key3==0)
while(!key3);
if(flag&&flag_jian)
{
//write_com(0x80+0x40+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
//delay_50us(1000);
Hum_L--;
if(Hum_L<=1) Hum_L=1;
}
if(flag&&flag_jia)
{
//write_com(0x80+9);
//write_com(0x0f);
//delay_50us(1000);
//write_com(0x0c);
//delay_50us(1000);
Hum_H--;
if(Hum_H<=Hum_L) Hum_H=Hum_L+1;
}
}
/********************************************/

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