main.c.130217154052

来自「ATmega16-ad1602」· 130217154052 代码 · 共 47 行

#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 ADtoBCD(unsigned int tep）
{       
	float j;
	unsigned int count;
	unsigned int Vref=50000;
	
	j = (float)(((float)((Vref/1024)))*tep)/1000.00;
	count = j*100;						
    
}
	
//主函数
void main(void)
{	
	
	unsigned int tmp;
	unsigned char *value = "0.000 V";	
	
	Init_LCD();
	LCD_DisplayString(2,1,value);  
	
	while(1)
	{
	 tmp=adc();//启动AD并返回temp值
	 ADtoBCD(tmp);//将temp值转换成BCD码并写入adcbuf[]
	  
	 LCD_DisplayString(2,1,value);  
	}
}