/****************************************************************************
*   Copyright: (C)2014 Î人ÁèÔÆǶÈëʽʵÑéÊÒ www.emblinux.com
*      Author: GuoWenxue<guowenxue@gmail.com> QQ: 281143292
* Description: ·Ü¶·STM32v5¿ª·¢°åcontiki²Ù×÷ϵͳʱÖÓº¯Êý£¬Ö÷ÒªÊÇsystick
*              ÖжϷþÎñ´¦Àí³ÌÐò¡£
* 
*   ChangeLog:
*        °æ±¾ºÅ     ÈÕÆÚ       ×÷Õß      ˵Ã÷
*        V1.0.0  2014.08.25  GuoWenxue   ·¢²¼¸Ã°æ±¾
****************************************************************************/

#include "stm32f10x.h"
#include "stm32f10x_it.h"

#include <sys/clock.h>
#include <sys/cc.h>
#include <sys/etimer.h>
#include <stdio.h>

static volatile clock_time_t current_clock = 0;   /* Total current running clocks */
static volatile unsigned long current_seconds = 0;  /* Current running seconds */
static unsigned int second_countdown = CLOCK_SECOND;

void SysTick_Handler(void) 
{
  current_clock++;
	
	/* timerlist²»Îª¿ÕÇÒ»¹Ã»ÓÐetimerµ½ÆÚ£¬ÔòÖ´ÐÐetimer_request_poll */
  if(etimer_pending() && etimer_next_expiration_time() <= current_clock) 
	{
		/* ÈÃetimer_process¸ü¿ìµØÔٴλñµÃÖ´ÐÐ */
    etimer_request_poll();
  }
	
  if (--second_countdown == 0) {
    current_seconds++;
    second_countdown = CLOCK_SECOND;
  }
	
  //printf("Current seconds:%lu Current Clocks: %u\n", current_seconds, current_clock);
}

void clock_init()
{
   if (SysTick_Config(SystemCoreClock / CLOCK_SECOND)) 
	 {
        while(1);
	 }
}

clock_time_t clock_time(void)
{
  return current_clock;
}

unsigned long clock_seconds(void)
{
  return current_seconds;
}