超聲波可以正常測距 但是按鍵無法設定報警距離 （報警模塊現在還沒有加）
//--------------------------------------
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define yh 0x80
#define NOP() {_nop_();_nop_();_nop_();_nop_();}
//------LCD引腳-----
sbit LCD_RS=P1^0;
sbit LCD_RW=P1^1;
sbit LCD_EN=P2^5;
sbit key1=P3^5; //設置鍵
sbit key2=P3^6; //加鍵
sbit key3=P3^7; //減鍵
sbit buzzer=P2^3; //蜂鳴器，通過三極管9012驅動，端口低電平響
//------超聲波引腳-------
sbit Tx=P3^3; //觸發控制信號輸入
sbit Rx=P3^2; //回響信號輸出
uchar code table[]={"L=000cm H=000cm"}; //LCD第一行顯示
uchar code table1[]={"0123456789"};
uchar temp_dis[]= {"Distance=000.0cm"}; //LCD第二行
long int t,distance,key1n,b1,b2,b3,b4,b5,b6;
uchar cache[4]={0,0,0,0};
//--------延時-------
void delay(uint ms)
{
uint t;
while(ms--)
for(t=0;t<120;t++);
}
//-------讀LCD狀態-------
uchar read_lcd_state()
{
uchar state;
LCD_RS=0;
LCD_RW=1;
LCD_EN=1;
_nop_();
state=P0;
LCD_EN=0;
_nop_();
return state;
}
//-------忙等待------
void lcd_busy_wait()
{
while((read_lcd_state() & 0x80)==0x80);
NOP();
}
//----------LCD寫指令----------
void lcd_write_com(uchar com)
{
lcd_busy_wait();
LCD_RS=0; //RS為0時，寫指令，RS為1時，寫數據
LCD_RW=0;
P0=com;
NOP();
LCD_EN=1;
NOP();
LCD_EN=0;
}
//----------LCD寫數據----------
void lcd_write_data(uchar dat)
{
lcd_busy_wait();
LCD_RS=1;
LCD_RW=0;
P0=dat;
NOP();
LCD_EN=1;
NOP();
LCD_EN=0;
}
//-------LCD初始化-------
void lcd_init()
{
LCD_EN=0;
lcd_write_com(0x38); //LCD顯示模式設置
lcd_write_com(0x0c); //LCD顯示開/關及光標設置
lcd_write_com(0x06); //當寫一個字符后地址指針加1，且光標加1
lcd_write_com(0x01); //顯示清屏
}
//---------設置液晶顯示位置-----------
void set_lcd_pos(uchar p)
{
lcd_write_com(p|0x80);
}
//---------液晶顯示程序----------
void lcd_print(uchar p,uchar *s,uint low)
{
uint num;
set_lcd_pos(p);
for(num=0;num<low;num++)
{
lcd_write_data(s[num]);
delay(1);
}
}
void HC05_Init()
{
Tx=1; //觸發脈沖
NOP();NOP();NOP();NOP();
Tx=0;
distance=0.188*t; //距離計算
}
void distance_convert(long int dat)
{
cache[0]=dat/1000;
cache[1]=dat/100%10;
cache[2]=dat/10%10;
cache[3]=dat%10;
temp_dis[9]=cache[0]+'0';
temp_dis[10]=cache[1]+'0';
temp_dis[11]=cache[2]+'0';
temp_dis[13]=cache[3]+'0';
}
//-------keybord_scan----------------------------
//****************鍵盤掃描有關函數**********************
void keyscan()
{
if(key1==0) //key1為功能鍵（設置鍵）
{
delay(9); //延時，用于消抖動
if(key1==0) //延時后再次確認按鍵按下
{
buzzer=0; //蜂鳴器短響一次
delay(20);
buzzer=1;
while(!key1);
key1n++;
if(key1n==8)
key1n=1; //設置按鍵共有秒、分、時、星期、日、月、年、返回，8個功能循環
switch(key1n)
{
case 1:
lcd_write_com(yh+0x02); //設置按鍵按動一次，秒位置顯示光標
lcd_write_com(0x0f); //設置光標為閃爍
// temp=(miao)/10*16+(miao)%10; //秒數據寫入DS1302
//write_1302(0x8e,0x00);
//write_1302(0x80,0x80|temp);//miao
//write_1302(0x8e,0x80);
break;
case 2: lcd_write_com(yh+4); //按2次fen位置顯示光標
lcd_write_com(0x0f);
break;
case 3: lcd_write_com(yh+5); //按動3次，shi
lcd_write_com(0x0f);
break;
case 4: lcd_write_com(yh+12); //按動4次，week
lcd_write_com(0x0f);
break;
case 5: lcd_write_com(yh+13); //按動5次，ri
lcd_write_com(0x0f);
break;
case 6: lcd_write_com(yh+14); //按動6次，yue
lcd_write_com(0x0f);
break;
case 7:
lcd_write_com(0x0c); //按動到第8次，設置光標不閃爍
}
}
}
//------------------------------加鍵key2----------------------------
if(key1n!=0) //當key1按下以下。再按以下鍵才有效（按鍵次數不等于零）
{
if(key2==0) //上調鍵
{
delay(10);
if(key2==0)
{
buzzer=0; //蜂鳴器短響一次
delay(20);
buzzer=1;
while(!key2);
switch(key1n)
{
case 1:b1++; //設置鍵按動1次，調秒
if(b1==10)
b1=0;
lcd_write_data(table1[b1]);
//write_1602com(0x0b);
break;
case 2:b2++; //設置鍵按動1次，調秒
if(b2==10)
b2=0;
lcd_write_data(table1[b2]);
//write_1602com(0x0b);
break;
case 3:b3++; //設置鍵按動1次，調秒
if(b3==10)
b3=0;
lcd_write_data(table1[b3]);
//write_1602com(0x0b);
break;
case 4:b4++; //設置鍵按動1次，調秒
if(b4==10)
b4=0;
lcd_write_data(table1[b4]);
//write_1602com(0x0b);
break;
case 5:b5++; //設置鍵按動1次，調秒
if(b5==10)
b5=0;
lcd_write_data(table1[b5]);
//write_1602com(0x0b);
break;
case 6:b6++; //設置鍵按動1次，調秒
if(b6==10)
b6=0;
lcd_write_data(table1[b6]);
//write_1602com(0x0b);
break;
}
}
}
//------------------減鍵key3，各句功能參照'加鍵'注釋---------------
if(key3==0)
{
delay(10); //調延時，消抖動
if(key3==0)
{
buzzer=0; //蜂鳴器短響一次
delay(20);
buzzer=1;
while(!key3);
switch(key1n)
{
case 1:b1--; //設置鍵按動1次，調秒
if(b1==-1)
b1=9;
lcd_write_data(b1);
//write_1602com(0x0b);
break;
case 2:b2--; //設置鍵按動1次，調秒
if(b2==-1)
b2=9;
lcd_write_data(b2);
//write_1602com(0x0b);
break;
case 3:b3--; //設置鍵按動1次，調秒
if(b3==-1)
b3=9;
lcd_write_data(b3);
//write_1602com(0x0b);
break;
case 4:b4--; //設置鍵按動1次，調秒
if(b4==-1)
b4=9;
lcd_write_data(b4);
//write_1602com(0x0b);
break;
case 5:b5--; //設置鍵按動1次，調秒
if(b5==-1)
b5=9;
lcd_write_data(b5);
//write_1602com(0x0b);
break;
case 6:b6--; //設置鍵按動1次，調秒
if(b6==-1)
b6=9;
lcd_write_data(b6);
//write_1602com(0x0b);
break;
}
}
}
}
}
//------------------------------------------------
//------------主程序-----------
void main()
{
lcd_init();
delay(5);
TMOD=0x19;
EA=1; //開總中斷
TR0=1; //啟動定時器
EX0=1; //開外部中斷
IT0=1; //設置為下降沿中斷方式
while(1)
{
HC05_Init();
distance_convert(distance);
lcd_print(0x00,table,16);
lcd_print(0x40,temp_dis,16);
}
}
//外部中斷0
void int0() interrupt 0
{
t=(TH0*256+TL0); //計算高電平持續的時間,上升沿到來時候開始計時，下降沿到來進入外部中斷，關閉計時器，停止計時
TH0=0;
TL0=0;
}
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