timer-ucos.c

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· C语言 代码 · 共 72 行

// Precise timer routines for LINUX  (C) LGB & A'rpi/ASTRAL



#include "mplaylib.h"
#include "mplayertm.h"
#include "config.h"

const char *timer_name =  "sleep ucos";
extern void BUFF_TimeDly(unsigned int tm);
extern int sthread_id;
int usec_sleep(int usec_delay)
{

//	F("%d\n",usec_delay);
	//if(usec_delay < 1000) usec_delay = 1000;
	BUFF_TimeDly(usec_delay);
	
}

// Returns current time in microseconds
unsigned int GetTimer(void){
	unsigned int dm[2];
	JZ_GetTimer_20ms(dm);
	//printf("%d,%d,%d\n",dm[0],dm[1],dm[1]*1000000+dm[0]);
  return (dm[1]*20000+dm[0]);
}  

// Returns current time in milliseconds
unsigned int GetTimerMS(void){
	unsigned int dm[2];
	JZ_GetTimer_20ms(dm);
  return (dm[1]*20 + dm[0]/1000);
}  

static unsigned int RelativeTime = 0;

// Returns time spent between now and last call in seconds
float GetRelativeTime(void){
  unsigned int t,r;
  t= GetTimer();
  r = t - RelativeTime;
  RelativeTime = t;
  
  return (float)r* 0.000001F;
}

// Initialize timer, must be called at least once at start
void InitTimer(void){
  GetRelativeTime();
}


#if 0
void timer_main(){
  float t=0;
  int t1;
  JZ_StartTimer();
  InitTimer();
  t1 = GetTimerMS();
  while(1){ 
  	GetTimer();
    
  	t+=GetRelativeTime();
  	OSTimeDly(100);
  	t1 = GetTimerMS();
  	printf("time= %d %d\r\n",(int)t,t1); 
  }
}
#endif