/*
 * FreeModbus Libary: BARE Port
 * Copyright (C) 2006 Christian Walter <wolti@sil.at>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * File: $Id$
 */

/* ----------------------- Platform includes --------------------------------*/
#include "port.h"

/* ----------------------- Modbus includes ----------------------------------*/
#include "mb.h"
#include "mbport.h"

/* ----------------------- static functions ---------------------------------*/
static void prvvTIMERExpiredISR( void );

/* ----------------------- Start implementation -----------------------------*/
BOOL
xMBPortTimersInit( USHORT usTim1Timerout50us )
{
	u16 PrescalerValue;
	
//	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
//	NVIC_InitTypeDef NVIC_InitStructure;

//	//´ò¿ªTIM4ʱÖÓ
//	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

//	//TIM4·ÖƵϵÊýΪ3599,ʱ»ùƵÂÊΪ72 / (1 + Prescaler) = 20KHz,»ù׼Ϊ50us
//	PrescalerValue = (u16) (SystemCoreClock / 20000) - 1; 

//	//TIM4³õʼ»¯
//	TIM_TimeBaseStructure.TIM_Period = (u16) usTim1Timerout50us;
//	TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue; //¶¨Ê±Æ÷·ÖƵ 50us
//	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
//	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
//	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);//³õʼ»¯TIM

//	//ʹÄÜTIM4ԤװÔØ
//	TIM_ARRPreloadConfig(TIM4, ENABLE);

//	//TIM4ÖжÏÅäÖÃ
//	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);
//	NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
//	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
//	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
//	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//	NVIC_Init(&NVIC_InitStructure);

//	//Çå³ý¸üÐÂÖжϱêÖ¾
//	TIM_ClearITPendingBit(TIM4,TIM_IT_Update);

//	//ʧÄÜTIM4¸üÐÂÖжÏ
//	TIM_ITConfig(TIM4, TIM_IT_Update, DISABLE);

//	//¹Ø±ÕTIM4¶¨Ê±Æ÷
//	TIM_Cmd(TIM4,  DISABLE);
	
	return TRUE;
}


inline void
vMBPortTimersEnable(  )
{
//    /* Enable the timer with the timeout passed to xMBPortTimersInit( ) */
//	//Çå³ý¸üÐÂÖжϱêÖ¾
//	TIM_ClearITPendingBit(TIM4,TIM_IT_Update);
//	
//	//ÔÊÐíTIM4¸üÐÂÖжÏ
//	TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE);
//	
//	//½«TIM4¼ÆÊýÖµÇåÁã
//	TIM_SetCounter(TIM4,0);
//	
//	//¿ªÆôTIM4¶¨Ê±Æ÷
//	TIM_Cmd(TIM4,ENABLE);
}

inline void
vMBPortTimersDisable(  )
{
//    /* Disable any pending timers. */
//	//Çå³ý¸üÐÂÖжϱêÖ¾
//	TIM_ClearITPendingBit(TIM4,TIM_IT_Update);
//	
//	//½ûÖ¹TIM4¸üÐÂÖжÏ
//	TIM_ITConfig(TIM4,TIM_IT_Update,DISABLE);
//	
//	//½«TIM4¼ÆÊýÖµÇåÁã
//	TIM_SetCounter(TIM4,0);
//	
//	//¹Ø±ÕTIM4¶¨Ê±Æ÷
//	TIM_Cmd(TIM4,DISABLE);
}

/* Create an ISR which is called whenever the timer has expired. This function
 * must then call pxMBPortCBTimerExpired( ) to notify the protocol stack that
 * the timer has expired.
 */
static void prvvTIMERExpiredISR( void )
{
    ( void )pxMBPortCBTimerExpired(  );
}

/**
  * @brief  TIM4ÖжϺ¯Êý
  * @param  ÎÞ
  * @retval ÎÞ
  */
void TIM4_IRQHandler(void)
{
//	//ÊÇ·ñ·¢ËÍTIM4¸üÐÂÖжÏ
//	if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)
//	{
//		//Çå³ýTIM4¸üÐÂÖжϱêÖ¾
//		TIM_ClearITPendingBit(TIM4, TIM_IT_Update);

//		prvvTIMERExpiredISR( );
//	}
}