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標題: LCD12864超聲波測距顯示程序 [打印本頁]

作者: hss.322 時間: 2021-7-15 11:26
標題: LCD12864超聲波測距顯示程序
#include<AT89X51.H>
#include<intrins.h>
//引腳定義
sbit    RX =  P1 ^ 0; //RX=Echo
sbit    TX =  P1 ^ 1; //TX=trig
sbit    CS =  P3 ^ 5;       //CS=RS
sbit    SID =  P3 ^ 6;       //SID=RW
sbit    SCLK  =  P3 ^ 4;       //  SCLK=E;  PSB接GND
unsigned char code num[]={"0123456789 :.-"};
unsigned char code d1[] ={"水情檢測系統"};
unsigned char code d2[]={"水位:"};
unsigned char code d3[]={"PH值:"};
unsigned char code d4[]={"電壓值:"};
unsigned char code dw1[] =  {"M"};
unsigned char code dw2[] =  {"V"};
unsigned int  time=0;
      long S=0;
      bit  flag =0;
unsigned char disbuff[4]          ={ 0,0,0,0,};

void Delaynms(unsigned int di) //延時
{
      unsigned int da,db;
      for(da=0;da<di;da++)
               for(db=0;db<10;db++);
}
void Send_byte(unsigned char bbyte) //發送一個字節
{
      unsigned char i;
      for(i=0;i<8;i++)
         {
               SID=bbyte&0x80; //取出最高位
               SCLK=1;
               SCLK=0;
               bbyte<<=1; //左移
         }
}
void Write_char(bit start, unsigned char ddata) //寫指令或數據
{
      unsigned char start_data,Hdata,Ldata;
      if(start==0)
            start_data=0xf8;       //寫指令
else
         start_data=0xfa;  //寫數據

      Hdata=ddata&0xf0;                //取高四位
      Ldata=(ddata<<4)&0xf0;  //取低四位
      Send_byte(start_data);       //發送起始信號
      Delaynms(5); //延時是必須的
      Send_byte(Hdata);             //發送高四位
      Delaynms(1);  //延時是必須的
      Send_byte(Ldata);                //發送低四位
      Delaynms(1);  //延時是必須的
}

void Lcd_init(void)       //初始化LCD
{
      Delaynms(10); //啟動等待，等LCM講入工作狀態
      CS=1;
      Write_char(0,0x30);  //8 位介面，基本指令集
      Write_char(0,0x0c);  //顯示打開，光標關，反白關
      Write_char(0,0x01);  //清屏，將DDRAM的地址計數器歸零
}
void Disp_img(unsigned char  *img)       //圖形方式12864顯示字模221 橫向取膜
{
      unsigned char i,j;
      unsigned int k = 0;

      Write_char(0,0x36); //圖形方式
      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)//清屏函數
{
      Write_char(0,0x01);
}

void LCD_set_xy( unsigned char x, unsigned char y )
{       //設置LCD顯示的起始位置，X為行，Y為列
unsigned char address;
      switch(x)
      {
            case 0: address = 0x80 + y; break;
         case 1: address = 0x90 + y; break;
            case 2: address = 0x88 + y; break;
                  case 3: 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)
{       //       中英文字符串顯示函數
      LCD_set_xy( X, Y );

while (*s)
{
            Write_char( 1, *s );
         s ++;
            Delaynms(1);
      }
}
void LCD_Write_number(unsigned char s)//       數字顯示函數
{
      Write_char(1,num[ s]);
      Delaynms(1);
}

void Lcd_Mark2(void)
{
      Clr_Scr();//清屏
      LCD_Write_string(0,1,d1);//
      LCD_Write_string(1,0,d2);//
      LCD_Write_string(2,0,d3);
      LCD_Write_string(3,0,d4);
      LCD_Write_string(1,7,dw1);//
            LCD_Write_string(3,7,dw2);//

}
void Conut(void)
      {
         time=TH0*256+TL0;
         TH0=0;
         TL0=0;
         S=time*1.87/100;    //算出來是M       11。0592M晶振
         if(flag==1)                   //超出測量
      {
         flag=0;
         LCD_set_xy( 1, 3 ); //第二行第三列開始顯示
         LCD_Write_number(13);
         LCD_Write_number(12);
         LCD_set_xy( 1, 4 );
         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( 1, 3 );
         LCD_Write_number(disbuff[1]);
         LCD_Write_number(12);
         LCD_set_xy( 1, 4 );
         LCD_Write_number(disbuff[2]);
         LCD_Write_number(disbuff[3]);

      }
      }
void zd0() interrupt 1                //T0中斷用來計數器溢出,超過測距范圍
  {
flag=1;                                                       //中斷溢出標志
  }

void  StartModule()                         //T1中斷用來掃描數碼管和計800MS啟動模塊
  {
      TX=1;                                        //800MS  啟動一次模塊
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      _nop_();
      TX=0;
  }

void main(void)
{
TMOD=0x01;                //設T0為方式1，GATE=1
      TH0=0;
      TL0=0;
      TR0=1;
//       Lcd_init();    //設置液晶顯示器
//       Clr_Scr();       //清屏
Lcd_init();
Lcd_Mark2();
while(1)
      {
      StartModule();
                                       //計算
      while(!RX);             //當RX為零時等待
      TR0=1;                         //開啟計數
      while(RX);                      //當RX為1計數并等待
      TR0=0;                               //關閉計數
      Conut();
      Delaynms(80);             //80MS

      }

}

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