多路超声波单片机程序和资料 -

/**************************************************************/
//使用时将US100跳帽拔下，使其设置为电平触发模式
/***************************************************************/
#include <reg52.h>
#include <intrins.h>
//引脚定义
sbit Trig1 = P1 ^ 0; //
sbit Ecno1 = P1 ^ 1; //
sbit Trig2 = P3 ^ 2; //
sbit Ecno2 = P3 ^ 3; //
sbit Trig3 = P1 ^ 2; //
sbit Ecno3 = P1 ^ 3; //
sbit Trig4 = P1 ^ 4; //
sbit Ecno4 = P1 ^ 5; //
sbit CS = P0 ^ 5; //片选高电平有效单片LCD使用时可固定高电平
sbit SID = P0 ^ 6; //数据
sbit SCLK = P0 ^ 7; //时钟
//　函数声明
void Write_char(bit start, unsigned char ddata);
void Send_byte(unsigned char bbyte);
void Delaynms(unsigned int di);
void Lcd_init(void);
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_set_xy( unsigned char x, unsigned char y );
void StartModule() ;
void Clr_Scr();
unsigned char code num[]={"0123456789 :."};
unsigned char code table1[]={" 前方距离："};
unsigned char code table2[] ={"后方距离："};
unsigned char code table3[] ={"左方距离："};
unsigned char code table4[] ={"右方距离："};
unsigned char code M[] = {"CM"};
unsigned int time1=0;
unsigned int time2=0;
unsigned int time3=0;
unsigned int time4=0;
long S1=0;
long S2=0;
long S3=0;
long S4=0;
bit flag =0;
unsigned char disbuff[4] ={ 0,0,0,0,};
/******************************************************************************/
void Lcd_init(void) //初始化LCD
{
Delaynms(10); //启动等待，等LCM讲入工作状态
CS=1;
Write_char(0,0x30); //8 位介面，基本指令集
Write_char(0,0x0c); //显示打开，光标关，反白关
Write_char(0,0x01); //清屏，将DDRAM的地址计数器归零
}
/******************************************************************************/
void Write_char(bit start, unsigned char ddata) //写指令或数据
{
unsigned char start_data,Hdata,Ldata;
if(start==0)
start_data=0xf8; //写指令
else
start_data=0xfa; //写数据
Hdata=ddata&0xf0; //取高四位
Ldata=(ddata<<4)&0xf0; //取低四位
Send_byte(start_data); //发送起始信号
Delaynms(5); //延时
Send_byte(Hdata); //发送高四位
Delaynms(1); //延时
Send_byte(Ldata); //发送低四位
Delaynms(1); //延时
}
/******************************************************************************/
void Send_byte(unsigned char bbyte) //发送一个字节
{
unsigned char i;
for(i=0;i<8;i++)
{
SID=bbyte&0x80; //取出最高位
SCLK=1;
SCLK=0;
bbyte<<=1; //左移
}
}
/******************************************************************************/
void Delaynms(unsigned int di) //延时
{
unsigned int da,db;
for(da=0;da<di;da++)
for(db=0;db<10;db++);
}
/******************************************************************************/
void Clr_Scr(void)//清屏函数
{
Write_char(0,0x01);
}
/******************************************************************************/
void LCD_set_xy( unsigned char x, unsigned char y )//设置LCD显示的起始位置，X为行，Y为列
{
unsigned char address;
switch(x)
{
case 0: address = 0x80 + y; break;
case 1: address = 0x80 + y; break;
case 2: address = 0x90 + y; break;
case 3: address = 0x88 + y; break;
case 4: address = 0x98 + y; break;
default:address = 0x80 + y; break;
}
Write_char(0, address);
}
/******************************************************************************/
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s)
{
LCD_set_xy( X, Y );
while (*s)
{
Write_char( 1, *s );
s ++;
Delaynms(1);
}
}
/******************************************************************************/
void LCD_Write_number(unsigned char s)// 数字显示函数
{
Write_char(1,num[s]);
Delaynms(1);
}
/******************************************************************************/
void Lcd_Mark2(void)
{
Clr_Scr();//清屏
LCD_Write_string(1,0,table1);//
LCD_Write_string(1,7,M);
LCD_Write_string(2,0,table2);
LCD_Write_string(2,7,M);//
LCD_Write_string(3,0,table3);//
LCD_Write_string(3,7,M);
LCD_Write_string(4,0,table4);//
LCD_Write_string(4,7,M);
}
/********************************************************/
void Conut1(void)
{
time1=TH0*256+TL0;
TH0=0x00;
TL0=0x00;
S1=time1*1.87/100; // 11.0592M晶振
if(flag==1) //超出测量
{
flag=0;
LCD_set_xy( 1, 5 );
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 1, 6 );
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S1%1000/100;
disbuff[2]=S1%1000%100/10;
disbuff[3]=S1%1000%100%10;
LCD_set_xy( 1, 5 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(disbuff[2]);
LCD_set_xy( 1, 6 );
LCD_Write_number(disbuff[3]);
}
}
/****************************************************/
void Conut2(void)
{
time2=TH0*256+TL0;
TH0=0x00;
TL0=0x00;
S2=time2*1.87/100; // 11.0592M晶振
if(flag==1) //超出测量
{
flag=0;
LCD_set_xy( 2, 5 );
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 2, 6 );
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S2%1000/100;
disbuff[2]=S2%1000%100/10;
disbuff[3]=S2%1000%100%10;
LCD_set_xy( 2, 5 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(disbuff[2]);
LCD_set_xy( 2, 6 );
LCD_Write_number(disbuff[3]);
}
}
/****************************************************/
void Conut4(void)
{
time4=TH0*256+TL0;
TH0=0x00;
TL0=0x00;
S4=time4*1.87/100; // 11.0592M晶振
if(flag==1) //超出测量
{
flag=0;
LCD_set_xy( 2, 5 );
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 2, 6 );
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S4%1000/100;
disbuff[2]=S4%1000%100/10;
disbuff[3]=S4%1000%100%10;
LCD_set_xy( 4, 5 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(disbuff[2]);
LCD_set_xy( 4, 6 );
LCD_Write_number(disbuff[3]);
}
}
/****************************************************/
void Conut3(void)
{
time3=TH0*256+TL0;
TH0=0x00;
TL0=0x00;
S3=time3*1.87/100; // 11.0592M晶振
if(flag==1) //超出测量
{
flag=0;
LCD_set_xy( 3, 5 );
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 3, 6 );
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S3%1000/100;
disbuff[2]=S3%1000%100/10;
disbuff[3]=S3%1000%100%10;
LCD_set_xy( 3, 5 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(disbuff[2]);
LCD_set_xy( 3, 6 );
LCD_Write_number(disbuff[3]);
}
}
/********************************************************/
void delay20us(void) //误差 -0.016637731481us
{
unsigned char a,b;
for(b=1;b>0;b--)
for(a=52;a>0;a--);
//if Keil,require use intrins.h
}
void Delay5ms() //@11.0592MHz
{
unsigned char i, j;
i = 54;
j = 199;
do
{
while (--j);
} while (--i);
}
void Delay50ms() //@11.0592MHz
{
unsigned char i, j, k;
i = 3;
j = 26;
k = 223;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void Delay300ms() //@11.0592MHz
{
unsigned char i, j, k;
i = 13;
j = 156;
k = 83;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
/********************************************************/
void zd0() interrupt 1 //T0中断用来计数器溢出,超过测距范围
{
flag=1; //中断溢出标志
}
/********************************************************/
void StartModule1() //超声波触发函数
{ Trig1=0;
delay20us();
Trig1=1;
delay20us(); //发射一个大于10us的脉冲，触发超声波发射
Trig1=0;
}
/******************************************************/
void StartModule2() //超声波触发函数
{ Trig2=0;
delay20us();
Trig2=1;
delay20us(); //发射一个大于10us的脉冲，触发超声波发射
Trig2=0;
}
/******************************************************/
void StartModule3() //超声波触发函数
{ Trig3=0;
delay20us();
Trig3=1;
delay20us(); //发射一个大于10us的脉冲，触发超声波发射
Trig3=0;
}
/******************************************************/
void StartModule4() //超声波触发函数
{ Trig4=0;
delay20us();
Trig4=1;
delay20us(); //发射一个大于10us的脉冲，触发超声波发射
Trig4=0;
}
/********************************************************/
void main(void)
{
TMOD=0x01; //设T0为方式1
TH0=0x00;
TL0=0x00;
TR0=1;
ET0=1; //允许T0中断
EA=1; //开启总中断
Lcd_init(); //设置液晶显示器
Clr_Scr(); //清屏
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