delay.h

串行通信程序

//各种延时程序
void delay2ms()
{
    unsigned int delay_buf_a=100;
    while(delay_buf_a--);
}

void delay20ms()
{
	unsigned int delay_buf_b=20;
	while(delay_buf_b--)
	{    
	  unsigned int delay_buf_c=1000;
	  while(delay_buf_c--);
	}
}