zuhe.c

AVR单片机实现液晶显示的程序代码

#include<iom8v.h>		//??¨1o?ATMEGA8|ì?¨a?¤???t
#include<macros.h>		//??¨1o?¨°?D?3?ê¨??o¨o|ì???§¨°?
#define uchar unsigned char
#define uint unsigned int
#define osccal_addr 0x1ff
#define fosc 8000000 //??ì??8MHZ
#define baud 9600 //2?§¨???¨o
#define LcdCmdPort PORTB
#define LcdDataPort PORTB
uint datax;
char d[9]={0x57,0x3d,0x11,0x2e,0x11,0x11,0x11,0x77,0x23};
uchar x,datah,K,datal,a[3],i,K,w1,w2,w3,w4;
float v,W;

//?á?D??¨?¨o?à|ì￡¤???ê???16??é??
void delay(uint x)   
{   uchar j;
    while(x-->0)
	{
       for(j=0;j<5;j++)
	   {;}
    }
}



unsigned char EEPROM_read(unsigned int uiAddress)
{while(EECR&(1<<EEWE));
 EEAR=uiAddress;
 EECR|=(1<<EERE);
 return EEDR;
}

void init_adc(void)
{ADMUX=(3<<REFS0);      //ADC2???|ì??1?a?¨22?2.56V,??ê?a¨a?§|쨤????ADC0
 ADCSRA=(1<<ADEN)|(1<<ADSC); //ADC¨o1?¨1?ê?2?é????￥¨°?????áa???ê?2?à??¤??|ì,
                                         
}	

void readadc(void)
{datal=ADCL;
 datah=ADCH;
 //ADCSRA=(1<<ADSC);    //|ì￡¤????áa??￥
 //datax=(datah<<8)+datal;
}

void LcdBusy(void); /* LCD???ì?????? */

void LcdBusy()
{ 

PORTC &= ~(1<<PORTC4);
PORTC |=  (1<<PORTC5);
LcdCmdPort = 0xff;
DDRB=0x00;
PORTC |=  (1<<PORTC3);
PORTC &= ~(1<<PORTC3);
while ((PINB&0x80)!=0)
{ 

PORTC &= ~(1<<PORTC3);
PORTC |=  (1<<PORTC3);
}
PORTC |=  (1<<PORTC3);
DDRB=0xff;
//LcdDelay(500);
}




void LcdXY(char,char); /* LCD?????¨?????? */
void LcdXY(char x,char y)
{ 

if ((y&0x01)!=0)LcdCmd(0x80|(x-1));
else LcdCmd(0xC0|(x-1));


}

void LcdCmd(char); /* LCD?????ü?????? */
void LcdCmd(char c)
{ 

LcdBusy();
PORTC |=  (1<<PORTC3);
PORTC &= ~(1<<PORTC4);
PORTC &= ~(1<<PORTC5);
//PORTC &= ~(1<<PORTC3);

LcdCmdPort = c;
delay(500);
PORTC &= ~(1<<PORTC3);

}


void LcdData(char); /* LCD???????????? */
void LcdData(char c)
{ 

LcdBusy();
PORTC |=  (1<<PORTC3);
PORTC |=  (1<<PORTC4);
PORTC &= ~(1<<PORTC5);
//PORTC &= ~(1<<PORTC3);

LcdDataPort = c;
delay(500);
PORTC &= ~(1<<PORTC3);
}

void init_wdt(void)
{WDTCR=(1<<WDCE)|(1<<WDE);
 WDTCR=(0<<WDCE)|(1<<WDE)|(1<<WDP2)|(1<<WDP1)|(1<<WDP0);
 /*看门狗允许、溢出时间2.1s,p44*/
}

void LcdInit(void); /* LCD?????????? */
void LcdInit()
{ 
PORTC |=  (1<<PORTC4);
PORTC |=  (1<<PORTC5);
PORTC |=  (1<<PORTC3);
LcdCmd(0x38);
LcdCmd(0x38);
LcdCmd(0x06);
LcdCmd(0x0c);
LcdCmd(0x01);
}


void LcdClr(void); /* LCD???????? */
void LcdClr()
{ 
LcdCmd(0x01);
}





void LcdStr(char *); /* ????×?·??????? */
void LcdStr(char *c)
{
int d=0;
while (c[d]!=0)
LcdData(c[d++]); /* char of LCM */

}



void main(void)
{  
   delay(2000);
   OSCCAL=EEPROM_read(osccal_addr);
   DDRC=0xfe;
   DDRB=0Xff;   
   //init_wdt()；
   SEI();
   init_adc();
   LcdInit();
   LcdClr();
  
   while(1)
   {   delay(10000);
       WDR();
	   init_adc();
       //LcdClr();
       ADCSRA|=(1<<ADSC);
	   while(ADCSRA&(1<<ADIF));
       readadc();
	   ADCSRA|=(1<<ADIF);
	   datax=(datah<<8)+datal;
	   ADCSRA&=~(1<<ADEN);
	   v=(float)datax/0x3ff*2.56;
	   W=(float)v*v;
	   w1=(uint)W;
	   w2=(uint)((W-w1)*10);
	   w3=(uint)((W-w1-w2/10)*100);
	   w4=(uint)((W-w1-w2/10-w3/100)*1000);      
       LcdXY(5,1);
	   delay(500);
	   d[2]=0x30+w1;
	   d[4]=0x30+w2;
	   d[5]=0x30+w3;
	   d[6]=0x30+w4;
	   delay(500);
       LcdStr(d);
       }
}