delay.c

来自「ARM7x256开发板的了LED测试程序」· C语言 代码 · 共 38 行

#include "delay.h"
#include "basetype.h"
//#include "project.h"

 void delay_1us_nop(void)
{   
	unsigned char i;
    for(i=0;i<2;i++);			
}

void delay_10us_nop(void)
{   
	unsigned char i;
    for(i=0;i<40;i++);			
	i = i << 1;					
	i = i << 1;					
}

void delay_50us_nop(void)
{   
	unsigned char i;
    for(i=0;i<217;i++);			
}



void delay_1ms(unsigned int ms)
{   
	unsigned int delay1, delay2;
    
	for( delay1=0; delay1<ms; delay1++ )
    {   for( delay2=0; delay2<20; delay2++ ) 
		{	delay_50us_nop(); // WDT_RST;    
		}
	}
}