[嵌入式]STC12单片机P4端口测试程序

STC12C5A60S2单片机P4端口寄存器说明可以查看芯片手册，此例程仅供参考

#include <STC12C5A60S2.h>
#include <intrins.h>

void Delay1ms()		//@11.0592MHz
{
	unsigned char i, j;

	_nop_();
	i = 11;
	j = 190;
	do
	{
		while (--j);
	} while (--i);
}


void Delay_ms(unsigned int timer)
{
	unsigned int i;
	for(i=0; i<timer; i++)
		Delay1ms();
}

void main()
{
	P4SW = 0xff;
	while(1)
	{
		
		P40 = 1;
		P41 = 1;
		P42 = 1;
		P43 = 1;
		P44 = 1;
		P45 = 1;
		P46 = 1;
		P47 = 1;
		Delay_ms(1000);
		
		
		P40 = 0;
		P41 = 0;
		P42 = 0;
		P43 = 0;
		P44 = 0;
		P45 = 0;
		P46 = 0;
		P47 = 0;
		Delay_ms(1000);
	}
}