单片机型号 STC89C516RD+

#include <REGX52.H>
#include <INTRINS.H>
void Delayms(unsigned int m)		//@11.0592MHz
{
	unsigned int n;
	for(n=0;n<m;n++){
		unsigned char i, j;

		_nop_();
		i = 2;
		j = 199;
		do
		{
			while (--j);
		} while (--i);
	}
	
}

void main()
{
	while(1){
		P2_0=0;
		Delayms(1000);
		P2_0=1;
		Delayms(1000);
	}
	
}