delay.c

来自「mega16 ucos操作系统」· C语言 代码 · 共 29 行

/*-----------------------------------------------------------------------
延时函数
系统时钟：4M
-----------------------------------------------------------------------*/
#include <iom16v.h>
#include <macros.h>
#include "delay.h"

#define xtal  4     //晶振频率nMHz

void delay_nus(unsigned int n) {

	if (n == 0) {
		return ;
		}
	while (--n);
}

/*延时函数*/
void delay_nms(unsigned int n) {

	unsigned int b;
	unsigned int a;
	for (a = 1; a < n; a++) {
		for (b = 1; b<xtal*143-2; b++) {			
			}
		}
}