aaa.c

protues编的数字电压表

#include <reg52.h>

sbit a = P2^6;

/*常用延时函数，t<65536*/
delay(unsigned int t)
{
	while(--t);
}


main()
{
	while(1)
	{	
		a=1;
		delay(10000);
		a=0;
		delay(10000);
	
	 }
}