Add doc and src folders

guowenxue

2018-02-04 785deec23b4cb1e7c4c4d81eb808f195adb1d98a

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/**************************************************************************** 
*   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      ËµÃ÷ 
*        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´ÐР*/
    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;
}