main.c

从零开始学51单片机源代码

#include "fun.h"   

void  ADC_interrupt() interrupt 5
{
	ADC_CONTR &= 0Xef;	//ADC_FLAG清零 
	//计算电压值 
	ad_result10 = ADC_RES;
	ad_result10 = ( ad_result10 << 2 ) | ADC_RESL;
	vin = ad_result10 * 5.0 / 1024 ; //ad_result10 = 1024 × ( Vin / 5v )

	display_num = (int)(vin * 10);
	shi =  display_num / 10;
	ge = display_num % 10;

	ADC_CONTR |= 0X08;	//ADC_START=1，启动ad转换
}

main()
{
	ms_delay(100);
	init_port();
	init_adc();

	//把两个数码管都关闭 
	en2 = 1;
	en1 = 1;

	IE |= 0x20; //EADC=1,打开adc中断 
	EA = 1;//开总中断 

	ADC_CONTR |= 0X08;	//ADC_START=1，启动ad转换

	while(1)
	{
		display(shi,ge);	
	}
}