?? delay.c
字號:
#define DELAY_C
#include "includes.h"
#define XTAL 4 //晶振頻率,單位MHz
void delay_1us(void) //1us延時函數(shù)
{
asm("nop");
}
void delay_nus(unsigned int n) //N us延時函數(shù)
{
unsigned int i=0;
for (i=0;i<n;i++)
delay_1us();
}
void delay_1ms(void) //1ms延時函數(shù)
{
unsigned int i;
for (i=0;i<(unsigned int)(XTAL*143-2);i++);
}
void delay_nms(unsigned int n) //N ms延時函數(shù)
{
unsigned int i=0;
for (i=0;i<n;i++)
{
delay_1ms();
}
}
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