lcd.c

MSP430单片机测量电阻及在LCM103的显示

#include <msp430xw42x.h>

void DELAY(void)
{
_NOP();
_NOP();
_NOP();
_NOP();
}
/**** LCD DRIVER MODE  SUB. **************
;WRITE COMMAND SUB. ***********/
void WRCOM(unsigned char _COM)
{
   unsigned char R7,M;
  // R7=9;     //LOOP=DATA 8 BIT +1X
    P3OUT|=BIT0;    // /CS=1
	_NOP();
	DELAY();
	P3OUT&=~(BIT0); // /CS=0
	DELAY();
	P3OUT&=~(BIT2); // /WR=0
	DELAY();
	_NOP();
	P3OUT|=BIT1;      //D=1 (100)
	DELAY();
	_NOP();
	P3OUT|=BIT2;      //WR=1
	DELAY();
	_NOP();
	P3OUT&=~(BIT2);    //WR=0
	DELAY();
	_NOP();
	P3OUT&=~(BIT1);    //D=0
	DELAY();
	_NOP();
	P3OUT|=BIT2;       //WR=1
    DELAY();
	_NOP();
	P3OUT&=~(BIT2);   //WR=0
	DELAY();
	_NOP();
	P3OUT&=~(BIT1);   //D=0
	DELAY();
	_NOP();
	P3OUT|=BIT2;     // WR=1
	DELAY();
	_NOP();

     M=_COM;

  for (R7=0;R7<=8;R7++)
   {   
     DELAY(); 
     _NOP();  
     P3OUT&=~(BIT2);   //WR=0
     DELAY();
 
     if ((M&0x80)==0) P3OUT&=~(BIT1);  //DATA=0
     else P3OUT|=BIT1;               //DATA=1
     
     DELAY();

    P3OUT|=BIT2;    //WR=1
    DELAY();  
    M=M<<1; 
  
   }
}


//WRITE DATA SUB.*********************************************
void WRDD(unsigned char _COM)
 { 
   unsigned char R6,M;   
    P3OUT|=BIT0;    // CS=1
	_NOP();
	DELAY();
	P3OUT&=~(BIT0); // CS=0
	DELAY();
	P3OUT&=~(BIT2); // WR=0
	DELAY();	
    P3OUT|=BIT1;    //D=1 (101)
	DELAY();
	P3OUT|=BIT2;    //WR=1
	DELAY();
	P3OUT&=~(BIT2); //WR=0
	DELAY();
	P3OUT&=~(BIT1); //D=0
	DELAY();
	P3OUT|=BIT2;    //WR=1
	DELAY();
	P3OUT&=~(BIT2); //WR=0
	DELAY();
	P3OUT|=BIT1;   //D=1
	DELAY();
	P3OUT|=BIT2;   //WR=1
	DELAY();

    M=_COM;

 for (R6=0;R6<=5;R6++)
  {
    DELAY(); 
    _NOP();
	P3OUT&=~(BIT2);   //WR=0
	DELAY();  
	
     if ((M&0x80)==0) 
      {
       P3OUT&=~(BIT1);  //DATA=0
      // DELAY();
      }
     else 
      {
       // _NOP();
       // DELAY();
        P3OUT|=BIT1;    //DATA=1
      // DELAY();
      }

     _NOP();
     DELAY();
     P3OUT|=BIT2;       // WR=1
     DELAY();  
     M=M<<1; 
   }
}


void WRDA(unsigned char _COM)
{
  unsigned char R5,M; 

  M=_COM;

  for (R5=0;R5<=3;R5++)
   {
    _NOP();
 	DELAY();
	P3OUT&=~(BIT2);   //WR=0
	DELAY();
//	M=_COM;
   if ((M&0x01)==0) 
      {
       P3OUT&=~(BIT1);  //DATA=0
       //DELAY();
      }
   else 
      {
       // _NOP();
       // DELAY();
        P3OUT|=BIT1;    //DATA=1
       // DELAY();
      }
    
     _NOP();
     DELAY();
     P3OUT|=BIT2;            //WR=1
     DELAY();  
     M=M>>1; 
   }
}
/*
void lianxu(void)
{
   unsigned char R6; 
   char a[12]={0x01,0x04,0x00,0x01,0x03,0x05,0x01,0x07,0x04,0x01,0x05,0x02}; 
   
    P3OUT|=BIT0;    //CS=1
	_NOP();
	DELAY();
	P3OUT&=~(BIT0); // CS=0
	DELAY();
	P3OUT&=~(BIT2); // WR=0
	DELAY();	
    P3OUT|=BIT1;      // D=1 (101)
	DELAY();
	P3OUT|=BIT2;       //WR=1
	DELAY();
	P3OUT&=~(BIT2);    //WR=0
	DELAY();
	P3OUT&=~(BIT1);    // D=0
	DELAY();
	P3OUT|=BIT2;       //WR=1
	DELAY();
	P3OUT&=~(BIT2);   //WR=0
	DELAY();
	P3OUT|=BIT1;      //D=1
	DELAY();
	P3OUT|=BIT2;       //WR=1
	DELAY();

 for (R6=0;R6<6;R6++)
  {      
	P3OUT&=~(BIT2);   // WR=0
	DELAY();  	    
    P3OUT&=~(BIT1);  // DATA=0
    DELAY();   
    P3OUT|=BIT2;      //WR=1
    DELAY();        
   }

for (R6=0;R6<12;R6++)
{
 WRDA(a[R6]);
}

}
*/
void display(float num)
{
 unsigned char shu[10][3]={{0x01,0x06,0x07},{0x01,0x04,0x00},{0x01,0x03,0x05},{0x01,0x07,0x04},{0x01,0x05,0x02},{0x00,0x07,0x06},{0x00,0x07,0x07},{0x01,0x06,0x00},{0x01,0x07,0x07},{0x01,0x07,0x06}};
 unsigned char intpart[10],dotpart[10],s[10];
 unsigned long temp,tempoten;
 unsigned char i,k,x,y;//i,k用于整数部分，x,y用于小数部分
 float dotp;
 
 for (k=0;k<10;k++)
 {
  intpart[10]=0;
  dotpart[10]=0;
  s[10]=0;
 }
 i=0;
 k=0;
 x=0;
 y=0;
 
 temp=(long)num;

 tempoten=temp/10;
 while(tempoten!=0)
  {
   intpart[i]=temp-10*tempoten; //
   temp=tempoten;
   tempoten=temp/10;
   i++;
  }
 intpart[i]=temp;
 /*
 for (k=0;k<=i;k++)
 {
  WRDA(shu[intpart[k]][0]);
  WRDA(shu[intpart[k]][1]);
  WRDA(shu[intpart[k]][2]);
 }*/
 
 dotp=num-(long)num;
while(dotp!=0)
{
dotpart[x]=(char)(dotp*10);
dotp=dotp*10.0;
dotp=dotp-(char)dotp;
x++;
}

x=7-i;

 for (y=0;y<x;y++)
 {
  s[y]=dotpart[x-1-y];
 }
 for (y=0;y<=i;y++)
 {
  s[x+y]=intpart[y];
 }
 WRDD(0x00);
 for (k=0;k<x;k++)
 {
  WRDA(shu[s[k]][0]);
  WRDA(shu[s[k]][1]);
  WRDA(shu[s[k]][2]);
 }
  WRDA((shu[s[x]][0])+0x04);
  WRDA(shu[s[k]][1]);
  WRDA(shu[s[k]][2]);
 for (k=x+1;k<=x+i;k++)
 {
  WRDA(shu[s[k]][0]);
  WRDA(shu[s[k]][1]);
  WRDA(shu[s[k]][2]);
 }

}

 

void clear_display(void)
{
unsigned char k;
WRDD(0x00);   //CLEAR DISPLAY 
 for (k=0;k<30;k++)
 {
 WRDA(0x00);   //FIRST ADDR
 }

} 
 
 
void Initial_lcd(void)
{
 unsigned int k;
 
 P3DIR|=BIT0+BIT1+BIT2;
 P3OUT|=BIT0+BIT1+BIT2;
 for (k = 0xffff; k > 0; k --); // 延时
 for (k = 0xffff; k > 0; k --); // 延时
 for (k = 0xffff; k > 0; k --); // 延时
 for (k = 0xffff; k > 0; k --); // 延时
 WRCOM(0x24);   //00100100B      ;INITIALIZE
 WRCOM(0x14);   //00010100B      ;32768HZ
 WRCOM(0x01);   //00000001B      ;SYS EN
 WRCOM(0x03);   //00000011B      ;LCD ON
 
 clear_display();
  
 WRDD(0x00);
 
}