/**
  ******************************************************************************
  * @file    stm32g0xx_hal.c
  * @author  MCD Application Team
  * @brief   HAL module driver.
  *          This is the common part of the HAL initialization
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2018 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 "stm32g0xx_hal.h"

/** @addtogroup STM32G0xx_HAL_Driver
  * @{
  */

/** @addtogroup HAL
  * @brief HAL module driver
  * @{
  */

#ifdef HAL_MODULE_ENABLED

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

/** @defgroup HAL_Private_Constants HAL Private Constants
  * @{
  */
/**
  * @brief STM32G0xx HAL Driver version number
  */
#define __STM32G0xx_HAL_VERSION_MAIN   (0x01U) /*!< [31:24] main version */
#define __STM32G0xx_HAL_VERSION_SUB1   (0x04U) /*!< [23:16] sub1 version */
#define __STM32G0xx_HAL_VERSION_SUB2   (0x06U) /*!< [15:8]  sub2 version */
#define __STM32G0xx_HAL_VERSION_RC     (0x00U) /*!< [7:0]  release candidate */
#define __STM32G0xx_HAL_VERSION         ((__STM32G0xx_HAL_VERSION_MAIN << 24U)\
                                        |(__STM32G0xx_HAL_VERSION_SUB1 << 16U)\
                                        |(__STM32G0xx_HAL_VERSION_SUB2 << 8U )\
                                        |(__STM32G0xx_HAL_VERSION_RC))

#if defined(VREFBUF)
#define VREFBUF_TIMEOUT_VALUE     10U   /*!<  10 ms */
#endif /* VREFBUF */

/**
  * @}
  */

/* Private macro -------------------------------------------------------------*/
/* Exported variables ---------------------------------------------------------*/
/** @defgroup HAL_Exported_Variables 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 -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/

/** @addtogroup HAL_Exported_Functions
  * @{
  */

/** @addtogroup HAL_Exported_Functions_Group1
 *  @brief    HAL Initialization and Configuration functions
 *
@verbatim
 ===============================================================================
           ##### HAL Initialization and Configuration functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Initialize the Flash interface the NVIC allocation and initial time base
          clock configuration.
      (+) De-initialize 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  Configure the Flash prefetch and the Instruction cache,
  *         the time base source, NVIC and any required global low level hardware
  *         by calling the HAL_MspInit() callback function to be optionally defined in user file
  *         stm32g0xx_hal_msp.c.
  *
  * @note   HAL_Init() function is called at the beginning of program after reset and before
  *         the clock configuration.
  *
  * @note   In the default implementation the System Timer (Systick) is used as source of time base.
  *         The Systick configuration is based on HSI clock, as HSI is the clock
  *         used after a system Reset.
  *         Once done, time base tick starts incrementing: the tick variable counter is incremented
  *         each 1ms in the SysTick_Handler() interrupt handler.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_Init(void)
{
  HAL_StatusTypeDef  status = HAL_OK;

  /* Configure Flash prefetch, Instruction cache             */
  /* Default configuration at reset is:                      */
  /* - Prefetch disabled                                     */
  /* - Instruction cache enabled                             */

#if (INSTRUCTION_CACHE_ENABLE == 0U)
  __HAL_FLASH_INSTRUCTION_CACHE_DISABLE();
#endif /* INSTRUCTION_CACHE_ENABLE */

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

  /* Use SysTick as time base source and configure 1ms tick (default clock after Reset is HSI) */
  if (HAL_InitTick(TICK_INT_PRIORITY) != HAL_OK)
  {
    status = HAL_ERROR;
  }
  else
  {
  /* Init the low level hardware */
  HAL_MspInit();
  }

  /* Return function status */
  return status;
}

/**
  * @brief  This function de-Initializes common part of the HAL and stops the source of time base.
  * @note   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_AHB_FORCE_RESET();
  __HAL_RCC_AHB_RELEASE_RESET();

  __HAL_RCC_IOP_FORCE_RESET();
  __HAL_RCC_IOP_RELEASE_RESET();

  /* De-Init the low level hardware */
  HAL_MspDeInit();

  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Initialize 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 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)
{
  HAL_StatusTypeDef  status = HAL_OK;

  /* Check uwTickFreq for MisraC 2012 (even if uwTickFreq is a enum type that doesn't take the value zero)*/ 
  if ((uint32_t)uwTickFreq != 0U)
  {
    /*Configure the SysTick to have interrupt in 1ms time basis*/
    if (HAL_SYSTICK_Config(SystemCoreClock / (1000U /(uint32_t)uwTickFreq)) == 0U)
    {
      /* Configure the SysTick IRQ priority */
      if (TickPriority < (1UL << __NVIC_PRIO_BITS))
      {
        HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority, 0U);
        uwTickPrio = TickPriority;
      }
      else
      {
        status = HAL_ERROR;
      }
    }
    else
    {
      status = HAL_ERROR;
    }
  }
  else
  {
    status = HAL_ERROR;
  }

  /* Return function status */
  return status;
}

/**
  * @}
  */

/** @addtogroup HAL_Exported_Functions_Group2
 *  @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

@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 += (uint32_t)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(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 */
  CLEAR_BIT(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 */
  SET_BIT(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 __STM32G0xx_HAL_VERSION;
}

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

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

/**
  * @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))));
}

/**
  * @}
  */

/** @addtogroup HAL_Exported_Functions_Group3
 *  @brief    HAL Debug functions
 *
@verbatim
 ===============================================================================
                      ##### HAL Debug functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Enable/Disable Debug module during STOP mode
      (+) Enable/Disable Debug module during STANDBY mode

@endverbatim
  * @{
  */

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

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

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

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

/**
  * @}
  */

/** @addtogroup HAL_Exported_Functions_Group4
 *  @brief    SYSCFG configuration functions
 *
@verbatim
 ===============================================================================
                      ##### HAL SYSCFG configuration functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
      (+) Enable/Disable Pin remap
      (+) Configure the Voltage reference buffer
      (+) Enable/Disable the Voltage reference buffer
      (+) Enable/Disable the I/O analog switch voltage booster
      (+) Enable/Disable dead battery behavior(*)
      (+) Configure Clamping Diode on specific pins(*)
   (*) Feature not available on all devices

@endverbatim
  * @{
  */
#if defined(VREFBUF)
/**
  * @brief Configure the internal voltage reference buffer voltage scale.
  * @param  VoltageScaling specifies the output voltage to achieve
  *         This parameter can be one of the following values:
  *         @arg @ref SYSCFG_VREFBUF_VoltageScale
  * @retval None
  */
void HAL_SYSCFG_VREFBUF_VoltageScalingConfig(uint32_t VoltageScaling)
{
  /* Check the parameters */
  assert_param(IS_SYSCFG_VREFBUF_VOLTAGE_SCALE(VoltageScaling));

  MODIFY_REG(VREFBUF->CSR, VREFBUF_CSR_VRS, VoltageScaling);
}

/**
  * @brief Configure the internal voltage reference buffer high impedance mode.
  * @param  Mode specifies the high impedance mode
  *          This parameter can be one of the following values:
  *          @arg @ref SYSCFG_VREFBUF_HighImpedance
  * @retval None
  */
void HAL_SYSCFG_VREFBUF_HighImpedanceConfig(uint32_t Mode)
{
  /* Check the parameters */
  assert_param(IS_SYSCFG_VREFBUF_HIGH_IMPEDANCE(Mode));

  MODIFY_REG(VREFBUF->CSR, VREFBUF_CSR_HIZ, Mode);
}

/**
  * @brief  Tune the Internal Voltage Reference buffer (VREFBUF).
  * @note   VrefBuf voltage scale is calibrated in production for each device,
  *         using voltage scale 1. This calibration value is loaded
  *         as default trimming value at device power up.
  *         This trimming value can be fine tuned for voltage scales 0 and 1
  *         using this function.
  * @retval None
  */
void HAL_SYSCFG_VREFBUF_TrimmingConfig(uint32_t TrimmingValue)
{
  /* Check the parameters */
  assert_param(IS_SYSCFG_VREFBUF_TRIMMING(TrimmingValue));

  MODIFY_REG(VREFBUF->CCR, VREFBUF_CCR_TRIM, TrimmingValue);
}

/**
  * @brief  Enable the Internal Voltage Reference buffer (VREFBUF).
  * @retval HAL_OK/HAL_TIMEOUT
  */
HAL_StatusTypeDef HAL_SYSCFG_EnableVREFBUF(void)
{
  uint32_t  tickstart;

  SET_BIT(VREFBUF->CSR, VREFBUF_CSR_ENVR);

  /* Get Start Tick*/
  tickstart = HAL_GetTick();

  /* Wait for VRR bit  */
  while (READ_BIT(VREFBUF->CSR, VREFBUF_CSR_VRR) == 0x00U)
  {
    if ((HAL_GetTick() - tickstart) > VREFBUF_TIMEOUT_VALUE)
    {
      return HAL_TIMEOUT;
    }
  }

  return HAL_OK;
}

/**
  * @brief  Disable the Internal Voltage Reference buffer (VREFBUF).
  *
  * @retval None
  */
void HAL_SYSCFG_DisableVREFBUF(void)
{
  CLEAR_BIT(VREFBUF->CSR, VREFBUF_CSR_ENVR);
}
#endif /* VREFBUF */

/**
  * @brief  Enable the I/O analog switch voltage booster
  * @retval None
  */
void HAL_SYSCFG_EnableIOAnalogSwitchBooster(void)
{
  SET_BIT(SYSCFG->CFGR1, SYSCFG_CFGR1_BOOSTEN);
}

/**
  * @brief  Disable the I/O analog switch voltage booster
  * @retval None
  */
void HAL_SYSCFG_DisableIOAnalogSwitchBooster(void)
{
  CLEAR_BIT(SYSCFG->CFGR1, SYSCFG_CFGR1_BOOSTEN);
}

/**
  * @brief  Enable the remap on PA11_PA12
  * @param  PinRemap specifies which pins have to be remapped
  *         This parameter can be any combination of the following values:
  *         @arg @ref SYSCFG_REMAP_PA11
  *         @arg @ref SYSCFG_REMAP_PA12
  * @retval None
  */
void HAL_SYSCFG_EnableRemap(uint32_t PinRemap)
{
  /* Check the parameter */
  assert_param(IS_HAL_REMAP_PIN(PinRemap));
  SET_BIT(SYSCFG->CFGR1, PinRemap);
}

/**
  * @brief  Disable the remap on PA11_PA12
  * @param  PinRemap specifies which pins will behave normally
  *         This parameter can be any combination of the following values:
  *         @arg @ref SYSCFG_REMAP_PA11
  *         @arg @ref SYSCFG_REMAP_PA12
  * @retval None
  */
void HAL_SYSCFG_DisableRemap(uint32_t PinRemap)
{
  /* Check the parameter */
  assert_param(IS_HAL_REMAP_PIN(PinRemap));
  CLEAR_BIT(SYSCFG->CFGR1, PinRemap);
}

#if defined(SYSCFG_CDEN_SUPPORT)
/**
  * @brief  Enable Clamping Diode on specified IO
  * @param  PinConfig specifies on which pins clamping Diode has to be enabled
  *         This parameter can be any combination of the following values:
  *         @arg @ref SYSCFG_ClampingDiode
  * @retval None
  */
void HAL_SYSCFG_EnableClampingDiode(uint32_t PinConfig)
{
  /* Check the parameter */
  assert_param(IS_SYSCFG_CLAMPINGDIODE(PinConfig));
  SET_BIT(SYSCFG->CFGR2, PinConfig);
}

/**
  * @brief  Disable Clamping Diode on specified IO
  * @param  PinConfig specifies on which pins clamping Diode has to be disabled
  *         This parameter can be any combination of the following values:
  *         @arg @ref SYSCFG_ClampingDiode
  * @retval None
  */
void HAL_SYSCFG_DisableClampingDiode(uint32_t PinConfig)
{
  /* Check the parameter */
  assert_param(IS_SYSCFG_CLAMPINGDIODE(PinConfig));
  CLEAR_BIT(SYSCFG->CFGR2, PinConfig);
}
#endif /* SYSCFG_CDEN_SUPPORT */

#if defined (SYSCFG_CFGR1_UCPD1_STROBE) || defined (SYSCFG_CFGR1_UCPD2_STROBE)
/**
  * @brief  Strobe configuration of GPIO depending on UCPDx dead battery settings
  * @param  ConfigDeadBattery specifies on which pins to make effective or not Dead Battery sw configuration
  *         This parameter can be any combination of the following values:
  *         @arg @ref SYSCFG_UCPD1_STROBE
  *         @arg @ref SYSCFG_UCPD2_STROBE
  * @retval None
  */
void HAL_SYSCFG_StrobeDBattpinsConfig(uint32_t ConfigDeadBattery)
{
  assert_param(IS_SYSCFG_DBATT_CONFIG(ConfigDeadBattery));

  /* Change strobe configuration of GPIO depending on UCPDx dead battery settings */
  MODIFY_REG(SYSCFG->CFGR1, (SYSCFG_CFGR1_UCPD1_STROBE | SYSCFG_CFGR1_UCPD2_STROBE), ConfigDeadBattery);
}
#endif /* SYSCFG_CFGR1_UCPD1_STROBE || SYSCFG_CFGR1_UCPD2_STROBE */
/**
  * @}
  */

/**
  * @}
  */

#endif /* HAL_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */


