超声波测距程序1602显示(已修改)

#include AT89C52.H //器件配置文件

#include intrins.h

#define RX P1_3

#define TX P1_4

#define LCM_RW P1_1 //定义LCD引脚

#define LCM_RS P1_2

#define LCM_E P1_0

#define LCM_Data P2

#define Key_Data P1_5 //定义Keyboard引脚

#define Key_CLK P1_6

#define Busy 0x80 //用于检测LCM状态字中的Busy标识

void LCMInit(void);

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData); void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code DData); void Delay5Ms(void);

void Delay400Ms(void);

void Decode(unsigned char ScanCode);

void WriteDataLCM(unsigned char WDLCM);

void WriteCommandLCM(unsigned char WCLCM,BuysC);

unsigned char ReadDataLCM(void);

unsigned char ReadStatusLCM(void);

unsigned char code mcustudio[] ={https://www.360docs.net/doc/a114647730.html,};

unsigned char code email[] = {fhwxaoo@https://www.360docs.net/doc/a114647730.html, };

unsigned char code Cls[] = { };

unsigned char code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};

static unsigned char DisNum = 0; 显示用指针

unsigned int time=0;

unsigned long S=0;

bit flag =0;

unsigned char disbuff[4] ={ 0,0,0,0,};

//写数据

void WriteDataLCM(unsigned char WDLCM)

{

ReadStatusLCM(); 检测忙

LCM_Data=WDLCM;

LCM_RS=1;

LCM_RW=0;

LCM_E=0; 若晶振速度太高可以在这后加小的延时

LCM_E=0; 延时

LCM_E=1;

}

//写指令

void WriteCommandLCM(unsigned char WCLCM,BuysC) ;BuysC为0时忽略忙检测{

if (BuysC) ReadStatusLCM(); 根据需要检测忙

LCM_Data = WCLCM;

LCM_RS=0;

LCM_RW=0;

LCM_E=0;

LCM_E=0;

LCM_E=1;

}

//读数据

unsigned char ReadDataLCM(void)

{

LCM_RS=1;

LCM_RW=1;

LCM_E=0;

LCM_E=0;

LCM_E=1;

return(LCM_Data);

}

//读状态

unsigned char ReadStatusLCM(void)

{

LCM_Data = 0xFF;

LCM_RS=0;

LCM_RW=1;

LCM_E=0;

LCM_E=0;

LCM_E=1;

while (LCM_Data & Busy); 检测忙信号

return(LCM_Data);

}

void LCMInit(void) ;LCM初始化

LCM_Data=0;

WriteCommandLCM(0x38,0); 三次显示模式设置，不检测忙信号

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,1); 显示模式设置,开始要求每次检测忙信号

WriteCommandLCM(0x08,1); 关闭显示

WriteCommandLCM(0x01,1); 显示清屏

WriteCommandLCM(0x06,1); 显示光标移动设置

WriteCommandLCM(0x0F,1); 显示开及光标设置

}

;按指定位置显示一个字符

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData) {

Y&=0x1;

X&=0xF; 限制X不能大于15，Y不能大于1

if (Y) X=0x40; 当要显示第二行时地址码+0x40;

X=0x80; 算出指令码

WriteCommandLCM(X, 1); 发命令字

WriteDataLCM(DData); 发数据

}

//按指定位置显示一串字符

void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code DData) {

unsigned char ListLength;

ListLength = 0;

Y &= 0x1;

X &= 0xF; 限制X不能大于15，Y不能大于1

while (DData[ListLength]0x19) // 若到达字串尾则退出

{

if (X = 0xF) //X坐标应小于0xF

{

DisplayOneChar(X, Y, DData[ListLength]); 显示单个字符

ListLength++;

X++;

}

}

//5ms延时

void Delay5Ms(void)

{

unsigned int TempCyc = 5552;

while(TempCyc--);

}

//400ms延时

void Delay400Ms(void)

{

unsigned char TempCycA = 5;

unsigned int TempCycB;

while(TempCycA--)

{

TempCycB=7269;

while(TempCycB--);

};

}

void Conut(void)

{

time=TH0256+TL0;

TH0=0;

TL0=0;

S=(time1.72)100; 算出来是CM

if((S=700)flag==1) /超出测量范围显示“-”

{

flag=0;

DisplayOneChar(0, 1, ASCII[11]);

DisplayOneChar(1, 1, ASCII[10]); 显示点

DisplayOneChar(2, 1, ASCII[11]);

DisplayOneChar(3, 1, ASCII[11]);

DisplayOneChar(4, 1, ASCII[12]); 显示M

}

else

{

disbuff[0]=S%1000100;

disbuff[1]=S%1000%10010;

disbuff[2]=S%1000%10 %10;

DisplayOneChar(0, 1, ASCII[disbuff[0]]);

DisplayOneChar(1, 1, ASCII[10]); 显示点

DisplayOneChar(2, 1, ASCII[disbuff[1]]);

DisplayOneChar(3, 1, ASCII[disbuff[2]]);

DisplayOneChar(4, 1, ASCII[12]); 显示M

}

}

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 StartModule() //启动模块

{

TX=1; //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 delayms(unsigned int ms)

{

unsigned char i=100,j;

For(;ms;ms--)

{

while(--i)

{

j=10;

while(--j);

}

}

}

void main(void)

{

unsigned char TempCyc;

Delay400Ms(); 启动等待，等LCM讲入工作状态

LCMInit(); LCM初始化

Delay5Ms(); 延时片刻(可不要)

DisplayListChar(0, 0, mcustudio);

DisplayListChar(0, 1, email);

ReadDataLCM();测试用句无意义

for (TempCyc=0; TempCyc10; TempCyc++)

Delay400Ms(); 延时

DisplayListChar(0, 1, Cls);

while(1)

{

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)

{

StartModule();

DisplayOneChar(0, 1, ASCII[0]);

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(); 计算

delayms(80); 80MS

}

}

}