超声波LCD显示测距程序

超声波L C D显示测距程
序
Company number【1089WT-1898YT-1W8CB-9UUT-92108】
/************************************************************** ****************/ /*Name:LCD12864(St7920/St7921)+超声波测距模块+STC89C52*/
/*DYP-ME007超声波测距模块DEMO程序
*/
/*晶振：11.0592M*/
*/
/*接线：模块TRIG接P1.2ECH0接P1.1
*/
/*RS(CS)接P3.3;
*/
/*RW(SID)接P3.4;
*/
/*E(SCLK)接P3.5;
*/
/*PSB接GND串行模式
*/
/************************************************************** ****************/
#include<AT89X51.H>
#include<intrins.h>
//引脚定义
sbitRX=P1^1;
sbitTX=P1^2;
sbitCS=P3^3; //片选高电平有效单片LCD使用时可固定高电平sbitSID=P3^4; //数据
sbitSCLK=P3^5; //时钟
//FunctionDefinition 函数声明
voidDelay(intnum);
voidInit_DS18B20(void);
unsignedcharReadOneChar(void);
voidWriteOneChar(unsignedchardat); unsignedintReadTemperature(void);
voidclock_out(unsignedchardd);
unsignedcharclock_in(void);
unsignedcharread_clock(unsignedcharord);
voidwrite_clock(unsignedcharord,unsignedchardd);
voidDisp(void);
voidid_case1_key(void);
voidid_case2_key(void);
voidSet_time(unsignedcharsel,bitsel_1);
voidTimer0_Init(void);
voidInit_1302(void);
voidSet_Bell(unsignedcharsel,bitsel_1);
voidBell(void);
//12864
voidWrite_char(bitstart,unsignedcharddata);
voidSend_byte(unsignedcharbbyte);
voidDelaynms(unsignedintdi);
voidLcd_init(void);
voidDisp_img(unsignedchar*img);
voidLCD_Write_string(unsignedcharX,unsignedcharY,unsignedchar*s );
voidLCD_set_xy(unsignedcharx,unsignedchary); unsignedcharcode:.-"};
unsignedcharcodewaves[]={"超声波测距系统"}; unsignedcharcodeznwk[]={"智能微控工作室"}; unsignedcharcodeCM[]={"M"};
unsignedinttime=0;
longS=0;
bitflag=0;
unsignedchardisbuff[4] ={0,0,0,0,};
unsignedcharcodelogo[]={
/*--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:\DocumentsandSettings\lwd\桌面\新建文件夹\X.bmp--*/
/*--宽度x高度=128x64--*/
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};
/************************************************************** ****************/
voidLcd_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
}
/************************************************************** ****************/
voidWrite_char(bitstart,unsignedcharddata)//写指令或数据
{
unsignedcharstart_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);//延时是必须的
Send_byte(Hdata); //发送高四位
Delaynms(1);//延时是必须的
Send_byte(Ldata); //发送低四位
Delaynms(1);//延时是必须的
}
/************************************************************** ****************/
voidSend_byte(unsignedcharbbyte)//发送一个字节
{
unsignedchari;
for(i=0;i<8;i++)
{
SID=bbyte&0x80;//取出最高位
SCLK=1;
SCLK=0;
bbyte<<=1;//左移
}
}
/************************************************************** ****************/
voidDelaynms(unsignedintdi)//延时
{
unsignedintda,db;
for(da=0;da<di;da++)
for(db=0;db<10;db++);
}
/************************************************************** ****************/
voidDisp_img(unsignedchar*img) //图形方式12864显示字模221横向取膜
{
unsignedchari,j;
unsignedintk=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++]);
}
}
}
/************************************************************** ****************/
voidClr_Scr(void)//清屏函数
{
Write_char(0,0x01);
}
/************************************************************** ****************/
voidLCD_set_xy(unsignedcharx,unsignedchary)
{ //设置LCD显示的起始位置，X为行，Y为列unsignedcharaddress;
switch(x)
{
case0:address=0x80+y;break;
case1:address=0x80+y;break;
case2:address=0x90+y;break;
case3:address=0x88+y;break;
case4:address=0x98+y;break;
default:address=0x80+y;break;
}
Write_char(0,address);
}
/************************************************************** ****************/
voidLCD_Write_string(unsignedcharX,unsignedcharY,unsignedchar*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);
}
}
/************************************************************** ****************/
voidLCD_Write_number(unsignedchars)// 数字显示函数
{
Write_char(1,num[s]);
Delaynms(1);
}
/************************************************************** ****************/
voidLcd_Mark2(void)
{
Clr_Scr();//清屏
LCD_Write_string(1,0,znwk);//
LCD_Write_string(2,0,waves);//
LCD_Write_string(3,7,CM);//
}
/********************************************************/ voidConut(void)
{
time=TH0*256+TL0;
TH0=0;
TL0=0;
S=time*1.87/100;//算出来是CM 11。

0592M晶振if(flag==1) //超出测量
{
flag=0;
LCD_set_xy(3,4);
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy(3,5);
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S%1000/100;
disbuff[2]=S%1000%100/10;
disbuff[3]=S%1000%10%10;
LCD_set_xy(3,4);
LCD_Write_number(disbuff[1]);
LCD_Write_number(12);
LCD_set_xy(3,5);
LCD_Write_number(disbuff[2]);
LCD_Write_number(disbuff[3]);
}
}
/********************************************************/ voiddelayms(unsignedintms)
{
unsignedchari=100,j;
for(;ms;ms--)
{
while(--i)
{
j=10;
while(--j);
}
}
}
/********************************************************/ voidzd0()interrupt1 //T0中断用来计数器溢出,超过测距范围{
flag=1; //中断溢出标志
}
/********************************************************/
voidStartModule() //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;
}
/********************************************************/ voidmain(void)
{
TMOD=0x01; //设T0为方式1，GATE=1
TH0=0;
TL0=0;
TR0=1;
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
Delaynms(1000);
Lcd_init();//从图形显示状态下返回
Lcd_Mark2();
while(1)
{
StartModule();
//计算
while(!RX); //当RX为零时等待
TR0=1; //开启计数
while(RX); //当RX为1计数并等待
TR0=0; //关闭计数
Conut();
delayms(80); //80MS
}
}。