delay.c

Keil ,LPC932系列环境下开发的频率测量单片机程序,用定时器来计脉冲数从而得出频率.

void delayms(unsigned int delay)
{
	unsigned int i;
	for(i=0;i<delay;i++)
	{
		#pragma asm
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		NOP
		#pragma endasm
	}
}