/**
  ******************************************************************************
  * @file    stm8s_tim4.c
  * @author  MCD Application Team
  * @version V2.1.0
  * @date    18-November-2011
  * @brief   This file contains all the functions for the TIM4 peripheral.
  ******************************************************************************
  */

// Includes ------------------------------------------------------------------
#include "stm8s_tim4.h"

 // @addtogroup STM8S_StdPeriph_Driver
// Private typedef -----------------------------------------------------------
// Private define ------------------------------------------------------------
// Private macro -------------------------------------------------------------
// Private variables ---------------------------------------------------------
// Private function prototypes -----------------------------------------------
  // * @addtogroup TIM4_Public_Functions

/**
  * @brief  Deinitializes the TIM4 peripheral registers to their default reset values.
  * @param  None
  * @retval None
  */
void TIM4_DeInit(void)
{
    TIM4->CR1 = TIM4_CR1_RESET_VALUE;
    TIM4->IER = TIM4_IER_RESET_VALUE;
    TIM4->CNTR = TIM4_CNTR_RESET_VALUE;
    TIM4->PSCR = TIM4_PSCR_RESET_VALUE;
    TIM4->ARR = TIM4_ARR_RESET_VALUE;
    TIM4->SR1 = TIM4_SR1_RESET_VALUE;
}

/**
  * @brief  Initializes the TIM4 Time Base Unit according to the specified parameters.
  * @param    TIM4_Prescaler specifies the Prescaler from TIM4_Prescaler_TypeDef.
  * @param    TIM4_Period specifies the Period value.
  * @retval None
  */
void TIM4_TimeBaseInit(TIM4_Prescaler_TypeDef TIM4_Prescaler, uint8_t TIM4_Period)
{
    // Check TIM4 prescaler value 
    assert_param(IS_TIM4_PRESCALER_OK(TIM4_Prescaler));
    // Set the Prescaler value 
    TIM4->PSCR = (uint8_t)(TIM4_Prescaler);
    // Set the Autoreload value 
    TIM4->ARR = (uint8_t)(TIM4_Period);
}



/**
  * @brief  Enables or disables the TIM4 peripheral.
  * @param   NewState new state of the TIM4 peripheral. This parameter can
  * be ENABLE or DISABLE.
  * @retval None
  */
void TIM4_Cmd(FunctionalState NewState)
{
    // Check the parameters 
    assert_param(IS_FUNCTIONALSTATE_OK(NewState));

    // set or Reset the CEN Bit 
    if (NewState != DISABLE)
    {
        TIM4->CR1 |= TIM4_CR1_CEN;
    }
    else
    {
        TIM4->CR1 &= (uint8_t)(~TIM4_CR1_CEN);
    }
}

/**
  * @brief  Enables or disables the specified TIM4 interrupts.
  * @param   NewState new state of the TIM4 peripheral.
  * This parameter can be: ENABLE or DISABLE.
  * @param   TIM4_IT specifies the TIM4 interrupts sources to be enabled or disabled.
  * This parameter can be any combination of the following values:
  * - TIM4_IT_UPDATE: TIM4 update Interrupt source
  * @param   NewState new state of the TIM4 peripheral.
  * @retval None
  */
void TIM4_ITConfig(TIM4_IT_TypeDef TIM4_IT, FunctionalState NewState)
{
    // Check the parameters 
    assert_param(IS_TIM4_IT_OK(TIM4_IT));
    assert_param(IS_FUNCTIONALSTATE_OK(NewState));

    if (NewState != DISABLE)
    {
        // Enable the Interrupt sources 
        TIM4->IER |= (uint8_t)TIM4_IT;
    }
    else
    {
        // Disable the Interrupt sources 
        TIM4->IER &= (uint8_t)(~TIM4_IT);
    }
}

/**
  * @brief  Enables or Disables the TIM4 Update event.
  * @param   NewState new state of the TIM4 peripheral Preload register. This parameter can
  * be ENABLE or DISABLE.
  * @retval None
  */
void TIM4_UpdateDisableConfig(FunctionalState NewState)
{
    // Check the parameters 
    assert_param(IS_FUNCTIONALSTATE_OK(NewState));

    // Set or Reset the UDIS Bit 
    if (NewState != DISABLE)
    {
        TIM4->CR1 |= TIM4_CR1_UDIS;
    }
    else
    {
        TIM4->CR1 &= (uint8_t)(~TIM4_CR1_UDIS);
    }
}

/**
  * @brief  Selects the TIM4 Update Request Interrupt source.
  * @param   TIM4_UpdateSource specifies the Update source.
  * This parameter can be one of the following values
  *                       - TIM4_UPDATESOURCE_REGULAR
  *                       - TIM4_UPDATESOURCE_GLOBAL
  * @retval None
  */
void TIM4_UpdateRequestConfig(TIM4_UpdateSource_TypeDef TIM4_UpdateSource)
{
    // Check the parameters 
    assert_param(IS_TIM4_UPDATE_SOURCE_OK(TIM4_UpdateSource));

    // Set or Reset the URS Bit 
    if (TIM4_UpdateSource != TIM4_UPDATESOURCE_GLOBAL)
    {
        TIM4->CR1 |= TIM4_CR1_URS;
    }
    else
    {
        TIM4->CR1 &= (uint8_t)(~TIM4_CR1_URS);
    }
}

/**
  * @brief  Selects the TIM4’s One Pulse Mode.
  * @param   TIM4_OPMode specifies the OPM Mode to be used.
  * This parameter can be one of the following values
  *                    - TIM4_OPMODE_SINGLE
  *                    - TIM4_OPMODE_REPETITIVE
  * @retval None
  */
void TIM4_SelectOnePulseMode(TIM4_OPMode_TypeDef TIM4_OPMode)
{
    // Check the parameters 
    assert_param(IS_TIM4_OPM_MODE_OK(TIM4_OPMode));

    // Set or Reset the OPM Bit 
    if (TIM4_OPMode != TIM4_OPMODE_REPETITIVE)
    {
        TIM4->CR1 |= TIM4_CR1_OPM;
    }
    else
    {
        TIM4->CR1 &= (uint8_t)(~TIM4_CR1_OPM);
    }

}

/**
  * @brief  Configures the TIM4 Prescaler.
  * @param   Prescaler specifies the Prescaler Register value
  * This parameter can be one of the following values
  *                       -  TIM4_PRESCALER_1
  *                       -  TIM4_PRESCALER_2
  *                       -  TIM4_PRESCALER_4
  *                       -  TIM4_PRESCALER_8
  *                       -  TIM4_PRESCALER_16
  *                       -  TIM4_PRESCALER_32
  *                       -  TIM4_PRESCALER_64
  *                       -  TIM4_PRESCALER_128
  * @param   TIM4_PSCReloadMode specifies the TIM4 Prescaler Reload mode.
  * This parameter can be one of the following values
  *                       - TIM4_PSCRELOADMODE_IMMEDIATE: The Prescaler is loaded
  *                         immediatly.
  *                       - TIM4_PSCRELOADMODE_UPDATE: The Prescaler is loaded at
  *                         the update event.
  * @retval None
  */
void TIM4_PrescalerConfig(TIM4_Prescaler_TypeDef Prescaler, TIM4_PSCReloadMode_TypeDef TIM4_PSCReloadMode)
{
    // Check the parameters 
    assert_param(IS_TIM4_PRESCALER_RELOAD_OK(TIM4_PSCReloadMode));
    assert_param(IS_TIM4_PRESCALER_OK(Prescaler));

    // Set the Prescaler value 
    TIM4->PSCR = (uint8_t)Prescaler;

    // Set or reset the UG Bit 
    TIM4->EGR = (uint8_t)TIM4_PSCReloadMode;
}

/**
  * @brief  Enables or disables TIM4 peripheral Preload register on ARR.
  * @param   NewState new state of the TIM4 peripheral Preload register.
  * This parameter can be ENABLE or DISABLE.
  * @retval None
  */
void TIM4_ARRPreloadConfig(FunctionalState NewState)
{
    // Check the parameters 
    assert_param(IS_FUNCTIONALSTATE_OK(NewState));

    // Set or Reset the ARPE Bit 
    if (NewState != DISABLE)
    {
        TIM4->CR1 |= TIM4_CR1_ARPE;
    }
    else
    {
        TIM4->CR1 &= (uint8_t)(~TIM4_CR1_ARPE);
    }
}

/**
  * @brief  Configures the TIM4 event to be generated by software.
  * @param   TIM4_EventSource specifies the event source.
  * This parameter can be one of the following values:
  *                       - TIM4_EVENTSOURCE_UPDATE: TIM4 update Event source
  * @retval None
  */
void TIM4_GenerateEvent(TIM4_EventSource_TypeDef TIM4_EventSource)
{
    // Check the parameters 
    assert_param(IS_TIM4_EVENT_SOURCE_OK(TIM4_EventSource));

    // Set the event sources 
    TIM4->EGR = (uint8_t)(TIM4_EventSource);
}


/**
  * @brief  Sets the TIM4 Counter Register value.
  * @param   Counter specifies the Counter register new value.
  * This parameter is between 0x00 and 0xFF.
  * @retval None
  */
void TIM4_SetCounter(uint8_t Counter)
{
    // Set the Counter Register value 
    TIM4->CNTR = (uint8_t)(Counter);
}


/**
  * @brief  Sets the TIM4 Autoreload Register value.
  * @param   Autoreload specifies the Autoreload register new value.
  * This parameter is between 0x00 and 0xFF.
  * @retval None
  */
void TIM4_SetAutoreload(uint8_t Autoreload)
{
    // Set the Autoreload Register value 
    TIM4->ARR = (uint8_t)(Autoreload);
}

/**
  * @brief  Gets the TIM4 Counter value.
  * @param  None
  * @retval Counter Register value.
  */
uint8_t TIM4_GetCounter(void)
{
    // Get the Counter Register value 
    return (uint8_t)(TIM4->CNTR);
}

/**
  * @brief  Gets the TIM4 Prescaler value.
  * @param  None
  * @retval Prescaler Register configuration value.
  */
TIM4_Prescaler_TypeDef TIM4_GetPrescaler(void)
{
    // Get the Prescaler Register value 
    return (TIM4_Prescaler_TypeDef)(TIM4->PSCR);
}

/**
  * @brief  Checks whether the specified TIM4 flag is set or not.
  * @param   TIM4_FLAG specifies the flag to check.
  * This parameter can be one of the following values:
  *                       - TIM4_FLAG_UPDATE: TIM4 update Flag
  * @retval FlagStatus The new state of TIM4_FLAG (SET or RESET).
  */
FlagStatus TIM4_GetFlagStatus(TIM4_FLAG_TypeDef TIM4_FLAG)
{
    FlagStatus bitstatus = RESET;
  
    // Check the parameters 
    assert_param(IS_TIM4_GET_FLAG_OK(TIM4_FLAG));

  if ((TIM4->SR1 & (uint8_t)TIM4_FLAG)  != 0)
  {
    bitstatus = SET;
  }
  else
  {
    bitstatus = RESET;
  }
  return ((FlagStatus)bitstatus);
}

/**
  * @brief  Clears the TIM4’s pending flags.
  * @param   TIM4_FLAG specifies the flag to clear.
  * This parameter can be one of the following values:
  *                       - TIM4_FLAG_UPDATE: TIM4 update Flag
  * @retval None.
  */
void TIM4_ClearFlag(TIM4_FLAG_TypeDef TIM4_FLAG)
{
    // Check the parameters 
    assert_param(IS_TIM4_GET_FLAG_OK(TIM4_FLAG));

    // Clear the flags (rc_w0) clear this bit by writing 0. Writing ‘1’ has no effect
    TIM4->SR1 = (uint8_t)(~TIM4_FLAG);

}
/**
  * @brief  Checks whether the TIM4 interrupt has occurred or not.
  * @param   TIM4_IT specifies the TIM4 interrupt source to check.
  * This parameter can be one of the following values:
  *                       - TIM4_IT_UPDATE: TIM4 update Interrupt source
  * @retval ITStatus The new state of the TIM4_IT (SET or RESET).
  */

ITStatus TIM4_GetITStatus(TIM4_IT_TypeDef TIM4_IT)
{
    ITStatus bitstatus = RESET;

  uint8_t itstatus = 0x0, itenable = 0x0;

  // Check the parameters 
  assert_param(IS_TIM4_IT_OK(TIM4_IT));

  itstatus = (uint8_t)(TIM4->SR1 & (uint8_t)TIM4_IT);

  itenable = (uint8_t)(TIM4->IER & (uint8_t)TIM4_IT);

  if ((itstatus != (uint8_t)RESET ) && (itenable != (uint8_t)RESET ))
  {
    bitstatus = (ITStatus)SET;
  }
  else
  {
    bitstatus = (ITStatus)RESET;
  }
  return ((ITStatus)bitstatus);
}

/**
  * @brief  Clears the TIM4's interrupt pending bits.
  * @param   TIM4_IT specifies the pending bit to clear.
  * This parameter can be one of the following values:
  *                       - TIM4_IT_UPDATE: TIM4 update Interrupt source
  * @retval None.
  */
void TIM4_ClearITPendingBit(TIM4_IT_TypeDef TIM4_IT)
{
    // Check the parameters 
    assert_param(IS_TIM4_IT_OK(TIM4_IT));

    // Clear the IT pending Bit 
    TIM4->SR1 = (uint8_t)(~TIM4_IT);
}

  
  
