main.c.130217125926

ATmega16-ad1602

#include "includes.h"

unsigned int mega16_ad(void)
{
	unsigned int addata;
	DDRA&=~BIT(PA0);
	PORTA&=~BIT(PA0);
	SFIOR=0;
	ADMUX=0x40;
	
	ADCSR=0X80;
	ADCSRA=(1<<ADEN)|(1<<ADSC)|(1<<ADIE)|(1<<ADPS2)|(1<<ADPS1) ;//64分频
	//ADCSR|=BIT(ADSC);
	while(!ADCSR&(BIT(ADIF)));
	addata=addata+ADCH*256;

	ADCSR|=BIT(ADIF);
	ADCSR=0x00; 
	return addata;
}

void main()
{   
	 float j;
	 unsigned int count;
	 unsigned int Vref=50000; 
     unsigned char *value1 = "0.000 V";	 
	 unsigned int  addata;
	 
	 unsigned char *test = "The Voltage is: ";
	 Init_LCD();
	 
	 
	 
	 LCD_DisplayString(1,1,test);
	 
	 
	 addata = mega16_ad();
	 j = (float)(((float)((Vref/1024)))*addata)/1000.00;
	 count = j*100;		
				
     value1[0] = count /1000+0x30;
	 count = count %1000;
     value1[2] = count /100+0x30;
     count = count %100;
     value1[3] = count  /10 + 0x30;			 
     value1[4] = count  %10 + 0x30;		
	 LCD_DisplayString(2,1,value1);   	
}
	/*
	unsigned char *test = "The Voltage is: ";
    unsigned char *value = "0.000 V";	
	float j;
	unsigned int count;
	unsigned int Vref=50000;  
	*/  
    /*
    //unsigned char temp[]="zhm"; 
	unsigned char *test = "The Voltage is: ";
	Init_LCD();
    init_adc();
    LCD_DisplayString(1,1,test);
	
	//LCD_DisplayString(2,1,value);        
    SREG |= (1<<7);	
	
	//LCD_DisplayString(2,1,temp);
	
	//temp=ReadADC();
	*/