基于51單片機的超聲波倒車報警系統(tǒng)Proteus仿真程序

ID:766955 · 發(fā)表于 2020-6-1 22:01

stc89c52單片機+lcd1602+srf04超聲波傳感器+DS18B20溫度傳感器+無源蜂鳴器

單片機源程序如下:

#include<reg51.h>
#include<intrins.h>
#include<math.h>
#include"lcd.h"
#include"temp.h"
/*??????*/
sbit Trig = P2^1;//??????????
sbit Echo = P2^0;
sbit DQ=P3^7; //?????
sbit beep=P1^5; //???
sbit key_up=P3^2;//????0?????
sbit key_down=P3^3;//????1?????
/*????????*/
/*?????????*/
unsigned char mes_temp[]="T:";//lcd???????
unsigned char mes_dis[]="S:";
unsigned char mes_alarmDis[]="aS:";
unsigned char code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};
/*??????*/
float time=0;//??
float temp;//??
uint S=0;//??
uint alarm_distance = 10;//????
bit flag =0;//???????
bit flag_temp =0;//?????? 0???,1???
uchar disbuff[4]= { 0,0,0,0};//???????
uchar temps[] = { 0, 0, 0, 0};//????
uchar alarm_distances[] = { 0, 0};//??????
/*****????****/
void delay(uchar n){//10us
while(n--);
}
void delayms(unsigned int ms){//1ms
unsigned char i=100,j;
for(; ms; ms--){
while(--i){
j=10;
while(--j);
}
}
}
/****????*****/
void Conut(void)
{
uint i=0;//????,????????????
float v;//?????
/*****????*****/
time=TH0*256+TL0;//??,us
TL0=0;//??????,???????
TH0=0;
if(flag_temp == 1)//????(??0)
v=332+temp*0.6;//???????????? m/s
else//?????
v=332-temp*0.6;//???????????? m/s
/* ????m/s???cm/us
v:m/s ----> ????0.5 0.5*v*100cm/1000 000us ----> v/20 000 cm/us
S=time*v ----> ???????
time/100 v/200 ???????????*/
time=time/100;
v=v/200;
S=time*v;//????
/*****??????*****/
/*****????,??????*****/
//?????????
LcdWriteCom(0x80+0x42);//???????2??? ????????0x80+0x40
if((S>=700)||flag==1) {//???????? ??????700cm ??????
flag=0;//?????????
while(i<1200){//????
beep = ~beep;
delay(100);
i++;
}//???????????
i=0;//???????
beep = 0;
//LCD????? -.--M
LcdWriteData(ASCII[11]);//-
LcdWriteData(ASCII[10]);//.
LcdWriteData(ASCII[11]);//-
LcdWriteData(ASCII[11]);//-
LcdWriteData( ASCII[12]);//M
}
else //?????? ? 68cm --> 0.68M
{
if(S<alarm_distance){
while(i<1200){//????
beep = ~beep;
delay(100);
i++;
}//???????????
i=0;//???????
beep = 0;
}
beep = 0;//??????
disbuff[0]=S/100; //??
disbuff[1]=S%100/10; //??
disbuff[2]=S%10 %10; //??
LcdWriteData(ASCII[disbuff[0]]);//0
LcdWriteData(ASCII[10]); //.
LcdWriteData(ASCII[disbuff[1]]);//6
LcdWriteData(ASCII[disbuff[2]]);//8
LcdWriteData(ASCII[12]); //M
}
LcdWriteCom(0x80+0x48);//??????
for(i = 0 ; i < 3; i++)
LcdWriteData(mes_alarmDis[i]);//aS:
alarm_distances[0]=alarm_distance%100/10; //??
alarm_distances[1]=alarm_distance%10 %10; //??
for(i = 0 ; i < 2; i++){
LcdWriteData(ASCII[alarm_distances[i]]);
if(i == 1){
LcdWriteData('c');
LcdWriteData('m');
}
}
}
/****??????***/
void T0_OVERFLOW() interrupt 1 //T0?????????,??????
{
flag=1;
}
void alarm_distance_up() interrupt 0 {//0?????0????
alarm_distance +=5;
}
void alarm_distance_down() interrupt 2 {//2?????1????
if(alarm_distance > 5)
alarm_distance -=5;
}
/****???????****/
void StartModule(){
uchar i;//????
Trig=1;//??????
for(i=10; i>0; i--)
_nop_(); //??10????,??
Trig=0;
}
/***??????*/
void temp_deal(int t){
uchar i;//????
float tp;//??????????
uint ttp;
if(t< 0){//?????
flag_temp = 0;
LcdWriteCom(0x82);//2???????
LcdWriteData('-');
//?????????????,????
//?????
t=t-1;
t=~t;
tp=t;
//? 27.123 ---> 2712.3+0.5 --->2712
ttp=tp*0.0625*100+0.5;
temp = ttp/100;
}
else{
flag_temp = 1;
if(t > 0){
LcdWriteCom(0x82);
LcdWriteData('+');
}
tp=t;//?????????
ttp=tp*0.0625*100+0.5;
temp = ttp/100;
}
//2712/1000 -> 2
temps[0] = ttp / 1000;
//2712%1000 -->712 712/100-->7
temps[1] = ttp % 1000 / 100;
//2712%100 --> 12 12/10 -->1
temps[2] = ttp % 100 / 10;
temps[3] = ttp % 10;//2712%10 --> 2
LcdWriteCom(0x83);
for(i =0; i < 4;i++){
if(i==2)
LcdWriteData(ASCII[10]);
LcdWriteData(ASCII[temps[i]]);
}
LcdWriteData(' ');
LcdWriteData('C');
}
/*???*/
void main(void){
uchar i; //for?????
TMOD=0x01; //??????
TH0=0; TL0=0;//???0??
IT0=1; IT1=1;//????0,1?????
ET0=1; //??T0??
EX0=1; EX1=1;//??????0,1
EA=1; //????
LcdInit(); //???1602
LcdWriteCom(0x80);//???????
for(i=0; i<2; i++)
LcdWriteData(mes_temp[i]);//T:
LcdWriteCom(0x80+0x40);//??????????
for(i=0; i<2; i++)
LcdWriteData(mes_dis[i]);//S:
while(1){
//?????????
temp_deal(Ds18b20ReadTemp());
StartModule();//???????
while(!Echo); //echo=1???
TR0=1; //????
while(Echo); //echo=0???
TR0=0; //????
Conut(); //???????
delayms(80); //??80ms
}
}

復(fù)制代碼

所有資料51hei提供下載:

UltrasonicDistanceMeasurementSystem-master.zip (148.28 KB, 下載次數(shù): 172)

ID:829126 · 發(fā)表于 2020-10-13 09:13

請問是51單片機還是stm32單片機

ID:833603 · 發(fā)表于 2020-10-23 15:31

1feng1 發(fā)表于 2020-10-13 09:13
請問是51單片機還是stm32單片機

51的

ID:787976 · 發(fā)表于 2020-11-1 10:42

怎么顯示成功的結(jié)果

ID:986539 · 發(fā)表于 2021-12-26 17:09

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基于51單片機的超聲波倒車報警系統(tǒng)Proteus仿真程序

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