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/**
  ******************************************************************************
  * @file    stm32f4xx_tim.c
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    04-August-2014
  * @brief   This file provides firmware functions to manage the following
  *          functionalities of the TIM peripheral:
  *            + TimeBase management
  *            + Output Compare management
  *            + Input Capture management
  *            + Advanced-control timers (TIM1 and TIM8) specific features  
  *            + Interrupts, DMA and flags management
  *            + Clocks management
  *            + Synchronization management
  *            + Specific interface management
  *            + Specific remapping management      
  *              
  @verbatim   
===============================================================================
                   #####  How to use this driver #####
===============================================================================
    [..]
    This driver provides functions to configure and program the TIM
    of all STM32F4xx devices.
    These functions are split in 9 groups:

      (#) TIM TimeBase management: this group includes all needed functions
          to configure the TM Timebase unit:
        (++) Set/Get Prescaler
        (++) Set/Get Autoreload  
        (++) Counter modes configuration
        (++) Set Clock division  
        (++) Select the One Pulse mode
        (++) Update Request Configuration
        (++) Update Disable Configuration
        (++) Auto-Preload Configuration
        (++) Enable/Disable the counter     

      (#) TIM Output Compare management: this group includes all needed
          functions to configure the Capture/Compare unit used in Output
          compare mode:
        (++) Configure each channel, independently, in Output Compare mode
        (++) Select the output compare modes
        (++) Select the Polarities of each channel
        (++) Set/Get the Capture/Compare register values
        (++) Select the Output Compare Fast mode
        (++) Select the Output Compare Forced mode  
        (++) Output Compare-Preload Configuration
        (++) Clear Output Compare Reference
        (++) Select the OCREF Clear signal
        (++) Enable/Disable the Capture/Compare Channels   

      (#) TIM Input Capture management: this group includes all needed
          functions to configure the Capture/Compare unit used in
          Input Capture mode:
        (++) Configure each channel in input capture mode
        (++) Configure Channel1/2 in PWM Input mode
        (++) Set the Input Capture Prescaler
        (++) Get the Capture/Compare values      

      (#) Advanced-control timers (TIM1 and TIM8) specific features
        (++) Configures the Break input, dead time, Lock level, the OSSI,
             the OSSR State and the AOE(automatic output enable)
        (++) Enable/Disable the TIM peripheral Main Outputs
        (++) Select the Commutation event
        (++) Set/Reset the Capture Compare Preload Control bit

      (#) TIM interrupts, DMA and flags management
        (++) Enable/Disable interrupt sources
        (++) Get flags status
        (++) Clear flags/ Pending bits
        (++) Enable/Disable DMA requests
        (++) Configure DMA burst mode
        (++) Select CaptureCompare DMA request  

      (#) TIM clocks management: this group includes all needed functions
          to configure the clock controller unit:
        (++) Select internal/External clock
        (++) Select the external clock mode: ETR(Mode1/Mode2), TIx or ITRx

      (#) TIM synchronization management: this group includes all needed
          functions to configure the Synchronization unit:
        (++) Select Input Trigger  
        (++) Select Output Trigger  
        (++) Select Master Slave Mode
        (++) ETR Configuration when used as external trigger   

      (#) TIM specific interface management, this group includes all
          needed functions to use the specific TIM interface:
        (++) Encoder Interface Configuration
        (++) Select Hall Sensor   

      (#) TIM specific remapping management includes the Remapping
          configuration of specific timers               

  @endverbatim   
  ******************************************************************************
  * @attention
  *
  * <h2><center>&#169; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_tim.h"
#include "stm32f4xx_rcc.h"

/** @addtogroup STM32F4xx_StdPeriph_Driver
  * @{
  */

/** @defgroup TIM
  * @brief TIM driver modules
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* ---------------------- TIM registers bit mask ------------------------ */
#define SMCR_ETR_MASK      ((uint16_t)0x00FF)
#define CCMR_OFFSET        ((uint16_t)0x0018)
#define CCER_CCE_SET       ((uint16_t)0x0001)  
#define