#ifndef _PT_TIMER_H_
#define _PT_TIMER_H_
#include "pt.h"


struct timer { 
  unsigned long  start;          //记录启动时的tick值
  unsigned long  interval;       //要定时的tick数
};

void timer_set(struct timer *t, unsigned long interval); 
unsigned char  timer_expired(struct timer *t); 
void delay_ms(unsigned long t_ms); 
void Delay10us(void);
void delay_us(unsigned int t);
#endif