欧美极品高清xxxxhd,国产日产欧美最新,无码AV国产东京热AV无码,国产精品人与动性XXX,国产传媒亚洲综合一区二区,四库影院永久国产精品,毛片免费免费高清视频,福利所导航夜趣136

標(biāo)題: 51單片機(jī)超聲波測(cè)距（LCD1602顯示）代碼 [打印本頁(yè)]

作者: fxjeasylife 時(shí)間: 2017-7-28 18:35
標(biāo)題: 51單片機(jī)超聲波測(cè)距（LCD1602顯示）代碼
Trig -------  P2^1;
Echo -------  P2^0;
VCC  -------- +5v
GND  -------- GND

請(qǐng)?jiān)谏想娭埃瑱z查好接線是否正確。
#include"lcd.h"

void Read_Busy()          //忙檢測(cè)函數(shù)，判斷bit7是0，允許執(zhí)行；1禁止
{
unsigned char sta;    //
LCD1602_DB = 0xff;
LCD1602_RS = 0;
LCD1602_RW = 1;
do
{
      LCD1602_EN = 1;
      sta = LCD1602_DB;
      LCD1602_EN = 0; //使能，用完就拉低，釋放總線
}while(sta & 0x80);
}

void Lcd1602_Write_Cmd(unsigned char cmd)    //寫(xiě)命令
{
Read_Busy();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_EN = 1;
LCD1602_EN = 0;
}

void Lcd1602_Write_Data(unsigned char dat) //寫(xiě)數(shù)據(jù)
{
   Read_Busy();
   LCD1602_RS = 1;
   LCD1602_RW = 0;
   LCD1602_DB = dat;
   LCD1602_EN = 1;
   LCD1602_EN = 0;
}

void LcdSetCursor(unsigned char x,unsigned char y)  //坐標(biāo)顯示
{
unsigned char addr;
if(y == 0)
      addr = 0x00 + x;
else
      addr = 0x40 + x;

Lcd1602_Write_Cmd(addr|0x80);
}

//按指定位置顯示一個(gè)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; //當(dāng)要顯示第二行時(shí)地址碼+0x40;
X |= 0x80; //算出指令碼
Lcd1602_Write_Cmd(X); //發(fā)命令字
Lcd1602_Write_Data(DData); //發(fā)數(shù)據(jù)
}

void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str)    //顯示字符串
{
LcdSetCursor(x,y);    //當(dāng)前字符的坐標(biāo)
while(*str != '\0')
{
      Lcd1602_Write_Data(*str++);
}
}

void InitLcd1602()             //1602初始化
{
Lcd1602_Write_Cmd(0x38); //打開(kāi)，5*8,8位數(shù)據(jù)
Lcd1602_Write_Cmd(0x0c);
Lcd1602_Write_Cmd(0x06);
Lcd1602_Write_Cmd(0x01); //清屏
}

#include<reg51.h>
#include<intrins.h>
#include"lcd.h"

sbit Trig = P2^1;
sbit Echo = P2^0;

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

static unsigned char DisNum = 0; //顯示用指針
   unsigned int  time=0;
   unsigned long S=0;
   bit    flag =0;
   unsigned char disbuff[4]    ={ 0,0,0,0,};
/*******************************************************************************
* 函數(shù) 名       : main
* 函數(shù)功能    : 主函數(shù)
* 輸入       : 無(wú)
* 輸出       : 無(wú)
*******************************************************************************/
void Conut(void)
{
   time=TH0*256+TL0;
   TH0=0;
   TL0=0;

   S=(time*1.7)/100;    //算出來(lái)是CM
   if((S>=700)||flag==1) //超出測(cè)量范圍顯示“-”
   {
   flag=0;

   DisplayOneChar(0, 1, ASCII[11]);
   DisplayOneChar(1, 1, ASCII[10]); //顯示點(diǎn)
   DisplayOneChar(2, 1, ASCII[11]);
   DisplayOneChar(3, 1, ASCII[11]);
   DisplayOneChar(4, 1, ASCII[12]); //顯示M
   }
   else
   {
   disbuff[0]=S%1000/100;
   disbuff[1]=S%1000%100/10;
   disbuff[2]=S%1000%10 %10;
   DisplayOneChar(0, 1, ASCII[disbuff[0]]);
   DisplayOneChar(1, 1, ASCII[10]); //顯示點(diǎn)
   DisplayOneChar(2, 1, ASCII[disbuff[1]]);
   DisplayOneChar(3, 1, ASCII[disbuff[2]]);
   DisplayOneChar(4, 1, ASCII[12]); //顯示M
   }
}

void zd0() interrupt 1    //T0中斷用來(lái)計(jì)數(shù)器溢出,超過(guò)測(cè)距范圍
  {
flag=1;    //中斷溢出標(biāo)志
  }

void  StartModule()          //啟動(dòng)模塊
  {
   Trig=1;                      //啟動(dòng)一次模塊
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   _nop_();
   Trig=0;
  }

void delayms(unsigned int ms)
{
unsigned char i=100,j;
for(;ms;ms--)
{
while(--i)
{
j=10;
while(--j);
}
}
}

void main(void)
{

   TMOD=0x01;    //設(shè)T0為方式1，GATE=1；
   TH0=0;
   TL0=0;
   ET0=1;          //允許T0中斷
   EA=1;    //開(kāi)啟總中斷

InitLcd1602();
LcdShowStr(0,0,PuZh);
while(1)
{
   StartModule();
      while(!Echo); //當(dāng)RX為零時(shí)等待
      TR0=1;       //開(kāi)啟計(jì)數(shù)
      while(Echo); //當(dāng)RX為1計(jì)數(shù)并等待
      TR0=0; //關(guān)閉計(jì)數(shù)
      Conut(); //計(jì)算
   delayms(80);
}

}

程序.rar

23.81 KB, 下載次數(shù): 23, 下載積分: 黑幣 -5

源代碼

歡迎光臨 (http://www.raoushi.com/bbs/)