newadc.c.130217155728

ATmega16-ad1602

#define NEWADC_C
#include"includes.h"
unsigned int adc(void)
{	 
	 unsigned int temp;
 	 DDRA&=~BIT(7);       //PA0口输入数据
	 ADMUX=0x40;
	 ADCSRA=0xC6;
	 while(!(ADCSRA&(BIT(4))));//查询方式
	 temp=ADCL;
	 temp=temp+ADCH*256;
	 ADCSRA|=BIT(4);
	 return temp;
}

void ADtoDCB(unsigned int tmp)
{
 	float j;
	unsigned int count;
	unsigned int Vref=50000;
	
	j = (float)(((float)((Vref/1024)))*tmp)/1000.00;
	count = j*100;						
    value[0] = count /1000+0x30;
	count = count %1000;
    value[2] = count /100+0x30;
    count = count %100;
    value[3] = count  /10 + 0x30;			 
    value[4] = count  %10 + 0x30;
}