/**
 * COPYRIGHT NOTICE
 *Copyright(c) 2014,YICHIP
 *
 * @file yc_timer.c
 * @brief ...
 *
 * @version 1.0
 * @author  jingzou
 * @data    Jan 23, 2018
**/

#include "yc_timer.h"
#include "yc11xx.h"
#include "core_cm0.h"
#include "LH_TaskManager.h"

uint32_t sys_tick_count;
uint8_t  sys_Timer_Check_Flag;
uint32_t gSystemTimerAdjustClknbt;
static unsigned int			sys_run_tickms=0;   			//从定时器初始化运行到当前的毫秒
static unsigned int			sys_run_ticks=0;   			//从定时器初始化运行到当前的秒
 
void SYS_TimerExpireDefaultHandle(int params)
{
	// YC_LOG_ERROR("default timer expire !\r\n");
	while(0);
}

void SYS_TimerInit()
{

	SysTick_Config(SYSTEM_CLOCK/CLOCK_DIVISOR); //each  systick interrupt is 1ms
}

static unsigned int system_time_get_run_tickms(void)
{
	return sys_run_tickms;
}

static unsigned int system_time_get_run_ticks(void)
{
	return sys_run_ticks;
}
static unsigned short MsCnt = 0;
void SYStick_handle()  //1ms中断一次
{
	//SYS_ClkTicks();
	//sys_Timer_Check_Flag = true;
//  SYS_timerPolling();
	 if(++MsCnt>999)
		{
		      MsCnt=0; 
			    sys_run_ticks++;
		}
		sys_run_tickms++;
	  TaskManager_Scheduling();
}

void SYS_delay_ms(uint32_t nms)
{
	SYS_delay_us(nms*1000);
}

void SYS_delay_us(uint32_t nus){
	uint32_t ticks;    
	uint32_t told,tnow,tcnt=0;    
	uint32_t reload=SysTick->LOAD;                
	ticks=nus*(SYSTEM_CLOCK/1000000);      
	tcnt=0;    
	told=SysTick->VAL;           
	while(1){        
		tnow=SysTick->VAL;            
		if(tnow!=told){                    
			if(tnow<told)
				tcnt+=told-tnow;
			else 
				tcnt+=reload-tnow+told;                    
			told=tnow;            

			if(tcnt>=ticks)
				break;
			}      
	};                                         
}


sys_time_handle_t sys_time_handle={
   .init= SYS_TimerInit,
   .get_run_ticks=system_time_get_run_ticks,
   .get_run_tickms=system_time_get_run_tickms
}  ;