/**
  ******************************************************************************
  * @file    stm32f2xx_hal.c
  * @author  MCD Application Team
  * @brief   HAL module driver.
  *          This is the common part of the HAL initialization
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  @verbatim
  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
    [..]
    The common HAL driver contains a set of generic and common APIs that can be
    used by the PPP peripheral drivers and the user to start using the HAL. 
    [..]
    The HAL contains two APIs' categories: 
         (+) Common HAL APIs
         (+) Services HAL APIs

  @endverbatim
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32f2xx_hal.h"

/** @addtogroup STM32F2xx_HAL_Driver
  * @{
  */

/** @defgroup HAL HAL
  * @brief HAL module driver.
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup HAL_Private_Constants
  * @{
  */
/**
  * @brief STM32F2xx HAL Driver version number V1.2.7
  */
#define __STM32F2xx_HAL_VERSION_MAIN   0x01U /*!< [31:24] main version */
#define __STM32F2xx_HAL_VERSION_SUB1   0x02U /*!< [23:16] sub1 version */
#define __STM32F2xx_HAL_VERSION_SUB2   0x07U /*!< [15:8]  sub2 version */
#define __STM32F2xx_HAL_VERSION_RC     0x00U /*!< [7:0]  release candidate */ 
#define __STM32F2xx_HAL_VERSION         ((__STM32F2xx_HAL_VERSION_MAIN << 24U)\
                                        |(__STM32F2xx_HAL_VERSION_SUB1 << 16U)\
                                        |(__STM32F2xx_HAL_VERSION_SUB2 << 8U) \
                                        |(__STM32F2xx_HAL_VERSION_RC))
                                        
#define IDCODE_DEVID_MASK    0x00000FFFU

/* ------------ RCC registers bit address in the alias region ----------- */
#define SYSCFG_OFFSET             (SYSCFG_BASE - PERIPH_BASE)
/* ---  MEMRMP Register ---*/ 
/* Alias word address of UFB_MODE bit */ 
#define MEMRMP_OFFSET             SYSCFG_OFFSET 
#define UFB_MODE_BIT_NUMBER       POSITION_VAL(SYSCFG_MEMRMP_UFB_MODE)
#define UFB_MODE_BB               (uint32_t)(PERIPH_BB_BASE + (MEMRMP_OFFSET * 32U) + (UFB_MODE_BIT_NUMBER * 4U)) 

/* ---  CMPCR Register ---*/ 
/* Alias word address of CMP_PD bit */ 
#define CMPCR_OFFSET              (SYSCFG_OFFSET + 0x20U) 
#define CMP_PD_BIT_NUMBER         POSITION_VAL(SYSCFG_CMPCR_CMP_PD)
#define CMPCR_CMP_PD_BB           (uint32_t)(PERIPH_BB_BASE + (CMPCR_OFFSET * 32U) + (CMP_PD_BIT_NUMBER * 4U))
/**
  * @}
  */

/* Private macro -------------------------------------------------------------*/
/* Exported variables ---------------------------------------------------------*/
/** @addtogroup HAL_Exported_Variables
  * @{
  */
__IO uint32_t uwTick;
uint32_t uwTickPrio   = (1UL << __NVIC_PRIO_BITS); /* Invalid PRIO */
HAL_TickFreqTypeDef uwTickFreq = HAL_TICK_FREQ_DEFAULT;  /* 1KHz */
/**
  * @}
  */
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/** @defgroup HAL_Exported_Functions HAL Exported Functions
  * @{
  */

/** @defgroup HAL_Exported_Functions_Group1 Initialization and de-initialization Functions 
 *  @brief    Initialization and de-initialization functions
 *
@verbatim    
 ===============================================================================
              ##### Initialization and de-initialization functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Initializes the Flash interface the NVIC allocation and initial clock 
          configuration. It initializes the systick also when timeout is needed 
          and the backup domain when enabled.
      (+) de-Initializes common part of the HAL
      (+) Configure The time base source to have 1ms time base with a dedicated 
          Tick interrupt priority. 
        (++) Systick timer is used by default as source of time base, but user 
             can eventually implement his proper time base source (a general purpose 
             timer for example or other time source), keeping in mind that Time base 
             duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
             handled in milliseconds basis.
        (++) Time base configuration function (HAL_InitTick ()) is called automatically 
             at the beginning of the program after reset by HAL_Init() or at any time 
             when clock is configured, by HAL_RCC_ClockConfig(). 
        (++) Source of time base is configured  to generate interrupts at regular 
             time intervals. Care must be taken if HAL_Delay() is called from a 
             peripheral ISR process, the Tick interrupt line must have higher priority 
            (numerically lower) than the peripheral interrupt. Otherwise the caller 
            ISR process will be blocked. 
       (++) functions affecting time base configurations are declared as __weak  
             to make  override possible  in case of other  implementations in user file.
@endverbatim
  * @{
  */

/**
  * @brief  This function is used to initialize the HAL Library; it must be the first 
  *         instruction to be executed in the main program (before to call any other
  *         HAL function), it performs the following:
  *           Configure the Flash prefetch, instruction and Data caches.
  *           Configures the SysTick to generate an interrupt each 1 millisecond,
  *           which is clocked by the HSI (at this stage, the clock is not yet
  *           configured and thus the system is running from the internal HSI at 16 MHz).
  *           Set NVIC Group Priority to 4.
  *           Calls the HAL_MspInit() callback function defined in user file 
  *           "stm32f2xx_hal_msp.c" to do the global low level hardware initialization 
  *            
  * @note   SysTick is used as time base for the HAL_Delay() function, the application
  *         need to ensure that the SysTick time base is always set to 1 millisecond
  *         to have correct HAL operation.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_Init(void)
{
  /* Configure Flash prefetch, Instruction cache, Data cache */ 
#if (INSTRUCTION_CACHE_ENABLE != 0U)
   __HAL_FLASH_INSTRUCTION_CACHE_ENABLE();
#endif /* INSTRUCTION_CACHE_ENABLE */

#if (DATA_CACHE_ENABLE != 0U)
   __HAL_FLASH_DATA_CACHE_ENABLE();
#endif /* DATA_CACHE_ENABLE */

#if (PREFETCH_ENABLE != 0U)
  __HAL_FLASH_PREFETCH_BUFFER_ENABLE();
#endif /* PREFETCH_ENABLE */

  /* Set Interrupt Group Priority */
  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);

  /* Use systick as time base source and configure 1ms tick (default clock after Reset is HSI) */
  HAL_InitTick(TICK_INT_PRIORITY);
  
  /* Init the low level hardware */
  HAL_MspInit();
  
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  This function de-Initializes common part of the HAL and stops the systick.
  *         This function is optional.   
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DeInit(void)
{
  /* Reset of all peripherals */
  __HAL_RCC_APB1_FORCE_RESET();
  __HAL_RCC_APB1_RELEASE_RESET();

  __HAL_RCC_APB2_FORCE_RESET();
  __HAL_RCC_APB2_RELEASE_RESET();

  __HAL_RCC_AHB1_FORCE_RESET();
  __HAL_RCC_AHB1_RELEASE_RESET();

  __HAL_RCC_AHB2_FORCE_RESET();
  __HAL_RCC_AHB2_RELEASE_RESET();

  __HAL_RCC_AHB3_FORCE_RESET();
  __HAL_RCC_AHB3_RELEASE_RESET();

  /* De-Init the low level hardware */
  HAL_MspDeInit();
    
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Initializes the MSP.
  * @retval None
  */
__weak void HAL_MspInit(void)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_MspInit could be implemented in the user file
   */
}

/**
  * @brief  DeInitializes the MSP.
  * @retval None
  */
__weak void HAL_MspDeInit(void)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_MspDeInit could be implemented in the user file
   */ 
}

/**
  * @brief This function configures the source of the time base.
  *        The time source is configured  to have 1ms time base with a dedicated 
  *        Tick interrupt priority.
  * @note This function is called  automatically at the beginning of program after
  *       reset by HAL_Init() or at any time when clock is reconfigured  by HAL_RCC_ClockConfig().
  * @note In the default implementation, SysTick timer is the source of time base. 
  *       It is used to generate interrupts at regular time intervals. 
  *       Care must be taken if HAL_Delay() is called from a peripheral ISR process, 
  *       The the SysTick interrupt must have higher priority (numerically lower) 
  *       than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
  *       The function is declared as __weak  to be overwritten  in case of other
  *       implementation  in user file.
  * @param  TickPriority Tick interrupt priority.
  * @retval HAL status
  */
__weak HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
  /* Configure the SysTick to have interrupt in 1ms time basis*/
  if (HAL_SYSTICK_Config(SystemCoreClock / (1000U / uwTickFreq)) > 0U)
  {
    return HAL_ERROR;
  }

  /* Configure the SysTick IRQ priority */
  if (TickPriority < (1UL << __NVIC_PRIO_BITS))
  {
    HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority, 0U);
    uwTickPrio = TickPriority;
  }
  else
  {
    return HAL_ERROR;
  }

  /* Return function status */
  return HAL_OK;
}

/**
  * @}
  */

/** @defgroup HAL_Exported_Functions_Group2 HAL Control functions 
 *  @brief    HAL Control functions
 *
@verbatim
 ===============================================================================
                      ##### HAL Control functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Provide a tick value in millisecond
      (+) Provide a blocking delay in millisecond
      (+) Suspend the time base source interrupt
      (+) Resume the time base source interrupt
      (+) Get the HAL API driver version
      (+) Get the device identifier
      (+) Get the device revision identifier
      (+) Enable/Disable Debug module during SLEEP mode
      (+) Enable/Disable Debug module during STOP mode
      (+) Enable/Disable Debug module during STANDBY mode

@endverbatim
  * @{
  */

/**
  * @brief This function is called to increment  a global variable "uwTick"
  *        used as application time base.
  * @note In the default implementation, this variable is incremented each 1ms
  *       in Systick ISR.
 * @note This function is declared as __weak to be overwritten in case of other 
  *      implementations in user file.
  * @retval None
  */
__weak void HAL_IncTick(void)
{
  uwTick += uwTickFreq;
}

/**
  * @brief Provides a tick value in millisecond.
  * @note This function is declared as __weak to be overwritten in case of other 
  *       implementations in user file.
  * @retval tick value
  */
__weak uint32_t HAL_GetTick(void)
{
  return uwTick;
}

/**
  * @brief This function returns a tick priority.
  * @retval tick priority
  */
uint32_t HAL_GetTickPrio(void)
{
  return uwTickPrio;
}

/**
  * @brief Set new tick Freq.
  * @retval status
  */
HAL_StatusTypeDef HAL_SetTickFreq(HAL_TickFreqTypeDef Freq)
{
  HAL_StatusTypeDef status  = HAL_OK;
  HAL_TickFreqTypeDef prevTickFreq;

  assert_param(IS_TICKFREQ(Freq));

  if (uwTickFreq != Freq)
  {
    /* Back up uwTickFreq frequency */
    prevTickFreq = uwTickFreq;

    /* Update uwTickFreq global variable used by HAL_InitTick() */
    uwTickFreq = Freq;

    /* Apply the new tick Freq  */
    status = HAL_InitTick(uwTickPrio);

    if (status != HAL_OK)
    {
      /* Restore previous tick frequency */
      uwTickFreq = prevTickFreq;
    }
  }

  return status;
}

/**
  * @brief return tick frequency.
  * @retval Tick frequency.
  *         Value of @ref HAL_TickFreqTypeDef.
  */
HAL_TickFreqTypeDef HAL_GetTickFreq(void)
{
  return uwTickFreq;
}

/**
  * @brief This function provides minimum delay (in milliseconds) based
  *        on variable incremented.
  * @note In the default implementation , SysTick timer is the source of time base.
  *       It is used to generate interrupts at regular time intervals where uwTick
  *       is incremented.
  * @note This function is declared as __weak to be overwritten in case of other
  *       implementations in user file.
  * @param  Delay specifies the delay time length, in milliseconds.
  * @retval None
  */
__weak void HAL_Delay(__IO uint32_t Delay)
{
  uint32_t tickstart = HAL_GetTick();
  uint32_t wait = Delay;

  /* Add a freq to guarantee minimum wait */
  if (wait < HAL_MAX_DELAY)
  {
    wait += (uint32_t)(uwTickFreq);
  }

  while ((HAL_GetTick() - tickstart) < wait)
  {
  }
}

/**
  * @brief Suspend Tick increment.
  * @note In the default implementation , SysTick timer is the source of time base. It is
  *       used to generate interrupts at regular time intervals. Once HAL_SuspendTick()
  *       is called, the SysTick interrupt will be disabled and so Tick increment 
  *       is suspended.
  * @note This function is declared as __weak to be overwritten in case of other
  *       implementations in user file.
  * @retval None
  */
__weak void HAL_SuspendTick(void)
{
  /* Disable SysTick Interrupt */
  SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk;
}

/**
  * @brief Resume Tick increment.
  * @note In the default implementation , SysTick timer is the source of time base. It is
  *       used to generate interrupts at regular time intervals. Once HAL_ResumeTick()
  *       is called, the SysTick interrupt will be enabled and so Tick increment 
  *       is resumed.
  * @note This function is declared as __weak to be overwritten in case of other
  *       implementations in user file.
  * @retval None
  */
__weak void HAL_ResumeTick(void)
{
  /* Enable SysTick Interrupt */
  SysTick->CTRL  |= SysTick_CTRL_TICKINT_Msk;
}

/**
  * @brief  Returns the HAL revision
  * @retval version : 0xXYZR (8bits for each decimal, R for RC)
  */
uint32_t HAL_GetHalVersion(void)
{
 return __STM32F2xx_HAL_VERSION;
}

/**
  * @brief  Returns the device revision identifier.
  * @retval Device revision identifier
  */
uint32_t HAL_GetREVID(void)
{
   return((DBGMCU->IDCODE) >> 16U);
}

/**
  * @brief  Returns the device identifier.
  * @retval Device identifier
  */
uint32_t HAL_GetDEVID(void)
{
   return((DBGMCU->IDCODE) & IDCODE_DEVID_MASK);
}

/**
  * @brief  Enable the Debug Module during SLEEP mode
  * @retval None
  */
void HAL_DBGMCU_EnableDBGSleepMode(void)
{
  SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
}

/**
  * @brief  Disable the Debug Module during SLEEP mode
  * @retval None
  */
void HAL_DBGMCU_DisableDBGSleepMode(void)
{
  CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_SLEEP);
}

/**
  * @brief  Enable the Debug Module during STOP mode
  * @retval None
  */
void HAL_DBGMCU_EnableDBGStopMode(void)
{
  SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
}

/**
  * @brief  Disable the Debug Module during STOP mode
  * @retval None
  */
void HAL_DBGMCU_DisableDBGStopMode(void)
{
  CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STOP);
}

/**
  * @brief  Enable the Debug Module during STANDBY mode
  * @retval None
  */
void HAL_DBGMCU_EnableDBGStandbyMode(void)
{
  SET_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
}

/**
  * @brief  Disable the Debug Module during STANDBY mode
  * @retval None
  */
void HAL_DBGMCU_DisableDBGStandbyMode(void)
{
  CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);
}

/**
  * @brief  Enables the I/O Compensation Cell.
  * @note   The I/O compensation cell can be used only when the device supply
  *         voltage ranges from 2.4 to 3.6 V.  
  * @retval None
  */
void HAL_EnableCompensationCell(void)
{
  *(__IO uint32_t *)CMPCR_CMP_PD_BB = (uint32_t)ENABLE;
}

/**
  * @brief  Power-down the I/O Compensation Cell.
  * @note   The I/O compensation cell can be used only when the device supply
  *         voltage ranges from 2.4 to 3.6 V.  
  * @retval None
  */
void HAL_DisableCompensationCell(void)
{
  *(__IO uint32_t *)CMPCR_CMP_PD_BB = (uint32_t)DISABLE;
}

/**
  * @brief  Returns first word of the unique device identifier (UID based on 96 bits)
  * @retval Device identifier
  */
uint32_t HAL_GetUIDw0(void)
{
  return (READ_REG(*((uint32_t *)UID_BASE)));
}

/**
  * @brief  Returns second word of the unique device identifier (UID based on 96 bits)
  * @retval Device identifier
  */
uint32_t HAL_GetUIDw1(void)
{
  return (READ_REG(*((uint32_t *)(UID_BASE + 4U))));
}

/**
  * @brief  Returns third word of the unique device identifier (UID based on 96 bits)
  * @retval Device identifier
  */
uint32_t HAL_GetUIDw2(void)
{
  return (READ_REG(*((uint32_t *)(UID_BASE + 8U))));
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */