超声波可以正常测距 但是按键无法设定报警距离 (报警模块现在还没有加)
//--------------------------------------
#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define yh 0x80
#define NOP() {_nop_();_nop_();_nop_();_nop_();}
//------LCD引脚-----
sbit LCD_RS=P1^0;
sbit LCD_RW=P1^1;
sbit LCD_EN=P2^5;
sbit key1=P3^5; //设置键
sbit key2=P3^6; //加键
sbit key3=P3^7; //减键
sbit buzzer=P2^3; //蜂鸣器,通过三极管9012驱动,端口低电平响
//------超声波引脚-------
sbit Tx=P3^3; //触发控制信号输入
sbit Rx=P3^2; //回响信号输出
uchar code table[]={"L=000cm H=000cm"}; //LCD第一行显示
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};
//--------延时-------
void delay(uint ms)
{
uint t;
while(ms--)
for(t=0;t<120;t++);
}
//-------读LCD状态-------
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写指令----------
void lcd_write_com(uchar com)
{
lcd_busy_wait();
LCD_RS=0; //RS为0时,写指令,RS为1时,写数据
LCD_RW=0;
P0=com;
NOP();
LCD_EN=1;
NOP();
LCD_EN=0;
}
//----------LCD写数据----------
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显示模式设置
lcd_write_com(0x0c); //LCD显示开/关及光标设置
lcd_write_com(0x06); //当写一个字符后地址指针加1,且光标加1
lcd_write_com(0x01); //显示清屏
}
//---------设置液晶显示位置-----------
void set_lcd_pos(uchar p)
{
lcd_write_com(p|0x80);
}
//---------液晶显示程序----------
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; //触发脉冲
NOP();NOP();NOP();NOP();
Tx=0;
distance=0.188*t; //距离计算
}
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----------------------------
//****************键盘扫描有关函数**********************
void keyscan()
{
if(key1==0) //key1为功能键(设置键)
{
delay(9); //延时,用于消抖动
if(key1==0) //延时后再次确认按键按下
{
buzzer=0; //蜂鸣器短响一次
delay(20);
buzzer=1;
while(!key1);
key1n++;
if(key1n==8)
key1n=1; //设置按键共有秒、分、时、星期、日、月、年、返回,8个功能循环
switch(key1n)
{
case 1:
lcd_write_com(yh+0x02); //设置按键按动一次,秒位置显示光标
lcd_write_com(0x0f); //设置光标为闪烁
// temp=(miao)/10*16+(miao)%10; //秒数据写入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位置显示光标
lcd_write_com(0x0f);
break;
case 3: lcd_write_com(yh+5); //按动3次,shi
lcd_write_com(0x0f);
break;
case 4: lcd_write_com(yh+12); //按动4次,week
lcd_write_com(0x0f);
break;
case 5: lcd_write_com(yh+13); //按动5次,ri
lcd_write_com(0x0f);
break;
case 6: lcd_write_com(yh+14); //按动6次,yue
lcd_write_com(0x0f);
break;
case 7:
lcd_write_com(0x0c); //按动到第8次,设置光标不闪烁
}
}
}
//------------------------------加键key2----------------------------
if(key1n!=0) //当key1按下以下。再按以下键才有效(按键次数不等于零)
{
if(key2==0) //上调键
{
delay(10);
if(key2==0)
{
buzzer=0; //蜂鸣器短响一次
delay(20);
buzzer=1;
while(!key2);
switch(key1n)
{
case 1:b1++; //设置键按动1次,调秒
if(b1==10)
b1=0;
lcd_write_data(table1[b1]);
//write_1602com(0x0b);
break;
case 2:b2++; //设置键按动1次,调秒
if(b2==10)
b2=0;
lcd_write_data(table1[b2]);
//write_1602com(0x0b);
break;
case 3:b3++; //设置键按动1次,调秒
if(b3==10)
b3=0;
lcd_write_data(table1[b3]);
//write_1602com(0x0b);
break;
case 4:b4++; //设置键按动1次,调秒
if(b4==10)
b4=0;
lcd_write_data(table1[b4]);
//write_1602com(0x0b);
break;
case 5:b5++; //设置键按动1次,调秒
if(b5==10)
b5=0;
lcd_write_data(table1[b5]);
//write_1602com(0x0b);
break;
case 6:b6++; //设置键按动1次,调秒
if(b6==10)
b6=0;
lcd_write_data(table1[b6]);
//write_1602com(0x0b);
break;
}
}
}
//------------------减键key3,各句功能参照'加键'注释---------------
if(key3==0)
{
delay(10); //调延时,消抖动
if(key3==0)
{
buzzer=0; //蜂鸣器短响一次
delay(20);
buzzer=1;
while(!key3);
switch(key1n)
{
case 1:b1--; //设置键按动1次,调秒
if(b1==-1)
b1=9;
lcd_write_data(b1);
//write_1602com(0x0b);
break;
case 2:b2--; //设置键按动1次,调秒
if(b2==-1)
b2=9;
lcd_write_data(b2);
//write_1602com(0x0b);
break;
case 3:b3--; //设置键按动1次,调秒
if(b3==-1)
b3=9;
lcd_write_data(b3);
//write_1602com(0x0b);
break;
case 4:b4--; //设置键按动1次,调秒
if(b4==-1)
b4=9;
lcd_write_data(b4);
//write_1602com(0x0b);
break;
case 5:b5--; //设置键按动1次,调秒
if(b5==-1)
b5=9;
lcd_write_data(b5);
//write_1602com(0x0b);
break;
case 6:b6--; //设置键按动1次,调秒
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; //开总中断
TR0=1; //启动定时器
EX0=1; //开外部中断
IT0=1; //设置为下降沿中断方式
while(1)
{
HC05_Init();
distance_convert(distance);
lcd_print(0x00,table,16);
lcd_print(0x40,temp_dis,16);
}
}
//外部中断0
void int0() interrupt 0
{
t=(TH0*256+TL0); //计算高电平持续的时间,上升沿到来时候开始计时,下降沿到来进入外部中断,关闭计时器,停止计时
TH0=0;
TL0=0;
}
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