#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);  


//这两个函数运用的时候禁止关中断
void delay_ms(int32_t nMs); 
void delay_us(int32_t nUs); 




#define delay_ms_noblock(pt1,t_ms)\
do\
{\
    static struct timer t2;\
    timer_set(&t2,t_ms);\
    PT_WAIT_UNTIL(pt1,timer_expired(&t2));\
}\
while(0);

#endif