📄 测距程序.c
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/******************************************************************************/
/* Name: LCD12864(St7920/St7921)+超声波测距模块+STC89C52 */
/* hy-SRF05 超声波测距模块 DEMO 程序 */
/* 晶振：11.0592M */
/* 接线：模块TRIG接 P3.7 ECH0 接P3.6 */
/* RS 接 P24; */
/* RW 接 P23; */
/* E 接 P22; */
/* PSB 接 P27; */
/******************************************************************************/
#include <AT89X51.H>
#include <intrins.h>
//引脚定义
sbit RX = P3^6;
sbit TX = P3^7;
sbit RS = P2^4;
sbit RW = P2^3;
sbit E = P2^2;
sbit RES = P2^5;
sbit PSB = P2^7;
sbit PAUSE = P2^6;
#define DataPort P1 //MCU P1<------> LCM
//Function Definition 函数声明
void delayms(unsigned int ms);
void Delay(int num);
void Init_DS18B20(void);
unsigned char ReadOneChar(void);
void WriteOneChar(unsigned char dat);
unsigned int ReadTemperature(void);
void clock_out(unsigned char dd);
unsigned char clock_in(void);
unsigned char read_clock(unsigned char ord);
void write_clock(unsigned char ord, unsigned char dd);
void Disp(void);
void id_case1_key(void);
void id_case2_key(void);
void Set_time(unsigned char sel,bit sel_1);
void Timer0_Init(void);
void Init_1302(void);
void Set_Bell(unsigned char sel, bit sel_1);
void Bell(void);
//12864
void Write_char(bit start, unsigned char ddata);
void Send_byte(unsigned char bbyte);
void Delaynms(unsigned int di);
void Lcd_init(void);
void Disp_img(unsigned char *img);
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_set_xy( unsigned char x, unsigned char y );
unsigned char code num[]={"0123456789 :.-"};
unsigned char code waves[]={"超声波测距系统"};
unsigned char code znwk[] ={"智能微控工作室"};
unsigned char code CM[] = {"M"};
unsigned int time=0;
long S=0;
bit flag =0;
unsigned char disbuff[4] ={ 0,0,0,0,};
unsigned char code logo[]={
/*-- 调入了一幅图像：logo.bmp -- */
/*-- 宽度x高度=128x64 欢迎使用本产品LOGO --*/
/*-- 调入了一幅图像：C:\Documents and Settings\lwd\桌面\新建文件夹\X.bmp --*/
/*-- 宽度x高度=128x64 --*/
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};
/******************************************************************************/
void Lcd_init(void) //初始化LCD
{
delayms(40); //大于40MS的延时程序
PSB=1; //设置为8BIT并口工作模式
delayms(1); //延时
RES=0; //复位
delayms(1); //延时
RES=1; //复位置高
delayms(1);
Write_char(0,0x30); //选择基本指令集
delayms(1); //延时大于100us
Write_char(0,0x30); //选择8bit数据流
delayms(1); //延时大于37us
Write_char(0,0x0c); //开显示(无游标、不反白)
delayms(1); //延时大于100us
Write_char(0,0x01); //清除显示，并且设定地址指针为00H
delayms(1); //延时大于10ms
Write_char(0,0x06); //指定在资料的读取及写入时，设定游标的移动方向及指定显示的移位，光标从右向左加1位移动
delayms(1); //延时大于100us
}
/******************************************************************************/
/*------------------------------------------------
检测忙位
------------------------------------------------*/
void Check_Busy()
{
RS=0;
RW=1;
E=1;
DataPort=0xff;
while((DataPort&0x80)==0x80);//忙则等待
E=0;
}
void Write_char(bit start, unsigned char ddata) //写指令或数据
{
// unsigned char start_data,Hdata,Ldata;
if(start==0)
{ Check_Busy();
RS=0;
RW=0;
E=1;
DataPort=ddata;
// delayms(5);
E=0;
// delayms(5);
}
else
{ Check_Busy();
RS=1;
RW=0;
E=1;
DataPort=ddata;
// delayms(5);
E=0;
// delayms(5);
}
}
/******************************************************************************/
void Delaynms(unsigned int di) //延时
{
unsigned int da,db;
for(da=0;da<di;da++)
for(db=0;db<10;db++);
}
/******************************************************************************/
void Disp_img(unsigned char *img) //图形方式12864显示字模221 横向取膜
{
unsigned char i,j;
unsigned int k = 0;
Write_char(0,0x36); //图形方式
for(i=0;i<32;i++)
{
Write_char(0,0x80+i);
Write_char(0,0x80);
for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
}
}
for(i=0;i<32;i++)
{
Write_char(0,0x80+i);
Write_char(0,0x88);
for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
}
}
}
/******************************************************************************/
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)
{ // 中英文字符串显示函数
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,znwk);//
LCD_Write_string(2,0,waves);//
LCD_Write_string(3,7,CM);//
}
/********************************************************/
void Conut(void)
{
time=TH0*256+TL0;
TH0=0;
TL0=0;
S=(time*1.8)/10; //算出来是mM
if((S>=7000)||flag==1) //超出测量范围显示“-”
{
flag=0;
LCD_set_xy( 3, 3 );
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 3, 4 );
LCD_Write_number(13);
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[0]=S/1000;
disbuff[1]=S/100%10;
disbuff[2]=S/10%10;
disbuff[3]=S%10;
LCD_set_xy( 3, 3 );
LCD_Write_number(disbuff[0]);
LCD_Write_number(12);
LCD_set_xy( 3, 4 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(disbuff[2]);
LCD_Write_number(disbuff[3]);
}
}
/********************************************************/
void delayms(unsigned int ms)
{
unsigned char i=100,j;
for(;ms;ms--)
{
while(--i)
{
j=10;
while(--j);
}
}
}
/********************************************************/
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
RX=0;
}
void Timer_Count(void)
{
TR0=1; //开启计数
while(RX); //当RX为1计数并等待
TR0=0; //关闭计数
Conut(); //计算
}
/********************************************************/
void StartModule() //T1中断用来扫描数码管和计800MS启动模块
{
TX=1; //800MS 启动一次模块
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
TX=0;
}
/********************************************************/
void main(void)
{
unsigned int valA;
Lcd_init(); //设置液晶显示器
Clr_Scr(); //清屏
Disp_img(logo); //显示欢迎使用本产品LOGO
delayms(80);
Lcd_init(); //从图形显示状态下返回
Lcd_Mark2();
TMOD=0x01; //设T0为方式1，GATE=1；
TH0=0;
TL0=0;
ET0=1; //允许T0中断
EA=1; //开启总中断
while(1)
{
delayms(60);
RX=1;
StartModule();
for(valA=7510;valA>0;valA--)
{
if(RX==1)
{
Timer_Count();
}
}
}
} ⌨️ 快捷键说明
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