/**
  ******************************************************************************
  * @file    stm32f0xx_ll_cortex.h
  * @author  MCD Application Team
  * @brief   Header file of CORTEX LL module.
  @verbatim
  ==============================================================================
                     ##### How to use this driver #####
  ==============================================================================
    [..]
    The LL CORTEX driver contains a set of generic APIs that can be
    used by user:
      (+) SYSTICK configuration used by LL_mDelay and LL_Init1msTick
          functions
      (+) Low power mode configuration (SCB register of Cortex-MCU)
      (+) API to access to MCU info (CPUID register)

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

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F0xx_LL_CORTEX_H
#define __STM32F0xx_LL_CORTEX_H

#ifdef __cplusplus
extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx.h"

/** @addtogroup STM32F0xx_LL_Driver
  * @{
  */

/** @defgroup CORTEX_LL CORTEX
  * @{
  */

/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

/* Private constants ---------------------------------------------------------*/

/* Private macros ------------------------------------------------------------*/

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/** @defgroup CORTEX_LL_Exported_Constants CORTEX Exported Constants
  * @{
  */

/** @defgroup CORTEX_LL_EC_CLKSOURCE_HCLK SYSTICK Clock Source
  * @{
  */
#define LL_SYSTICK_CLKSOURCE_HCLK_DIV8     0x00000000U                 /*!< AHB clock divided by 8 selected as SysTick clock source.*/
#define LL_SYSTICK_CLKSOURCE_HCLK          SysTick_CTRL_CLKSOURCE_Msk  /*!< AHB clock selected as SysTick clock source. */
/**
  * @}
  */

/**
  * @}
  */

/* Exported macro ------------------------------------------------------------*/

/* Exported functions --------------------------------------------------------*/
/** @defgroup CORTEX_LL_Exported_Functions CORTEX Exported Functions
  * @{
  */

/** @defgroup CORTEX_LL_EF_SYSTICK SYSTICK
  * @{
  */

/**
  * @brief  This function checks if the Systick counter flag is active or not.
  * @note   It can be used in timeout function on application side.
  * @rmtoll STK_CTRL     COUNTFLAG     LL_SYSTICK_IsActiveCounterFlag
  * @retval State of bit (1 or 0).
  */
__STATIC_INLINE uint32_t LL_SYSTICK_IsActiveCounterFlag(void)
{
  return ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == (SysTick_CTRL_COUNTFLAG_Msk));
}

/**
  * @brief  Configures the SysTick clock source
  * @rmtoll STK_CTRL     CLKSOURCE     LL_SYSTICK_SetClkSource
  * @param  Source This parameter can be one of the following values:
  *         @arg @ref LL_SYSTICK_CLKSOURCE_HCLK_DIV8
  *         @arg @ref LL_SYSTICK_CLKSOURCE_HCLK
  * @retval None
  */
__STATIC_INLINE void LL_SYSTICK_SetClkSource(uint32_t Source)
{
  if (Source == LL_SYSTICK_CLKSOURCE_HCLK)
  {
    SET_BIT(SysTick->CTRL, LL_SYSTICK_CLKSOURCE_HCLK);
  }
  else
  {
    CLEAR_BIT(SysTick->CTRL, LL_SYSTICK_CLKSOURCE_HCLK);
  }
}

/**
  * @brief  Get the SysTick clock source
  * @rmtoll STK_CTRL     CLKSOURCE     LL_SYSTICK_GetClkSource
  * @retval Returned value can be one of the following values:
  *         @arg @ref LL_SYSTICK_CLKSOURCE_HCLK_DIV8
  *         @arg @ref LL_SYSTICK_CLKSOURCE_HCLK
  */
__STATIC_INLINE uint32_t LL_SYSTICK_GetClkSource(void)
{
  return READ_BIT(SysTick->CTRL, LL_SYSTICK_CLKSOURCE_HCLK);
}

/**
  * @brief  Enable SysTick exception request
  * @rmtoll STK_CTRL     TICKINT       LL_SYSTICK_EnableIT
  * @retval None
  */
__STATIC_INLINE void LL_SYSTICK_EnableIT(void)
{
  SET_BIT(SysTick->CTRL, SysTick_CTRL_TICKINT_Msk);
}

/**
  * @brief  Disable SysTick exception request
  * @rmtoll STK_CTRL     TICKINT       LL_SYSTICK_DisableIT
  * @retval None
  */
__STATIC_INLINE void LL_SYSTICK_DisableIT(void)
{
  CLEAR_BIT(SysTick->CTRL, SysTick_CTRL_TICKINT_Msk);
}

/**
  * @brief  Checks if the SYSTICK interrupt is enabled or disabled.
  * @rmtoll STK_CTRL     TICKINT       LL_SYSTICK_IsEnabledIT
  * @retval State of bit (1 or 0).
  */
__STATIC_INLINE uint32_t LL_SYSTICK_IsEnabledIT(void)
{
  return (READ_BIT(SysTick->CTRL, SysTick_CTRL_TICKINT_Msk) == (SysTick_CTRL_TICKINT_Msk));
}

/**
  * @}
  */

/** @defgroup CORTEX_LL_EF_LOW_POWER_MODE LOW POWER MODE
  * @{
  */

/**
  * @brief  Processor uses sleep as its low power mode
  * @rmtoll SCB_SCR      SLEEPDEEP     LL_LPM_EnableSleep
  * @retval None
  */
__STATIC_INLINE void LL_LPM_EnableSleep(void)
{
  /* Clear SLEEPDEEP bit of Cortex System Control Register */
  CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
}

/**
  * @brief  Processor uses deep sleep as its low power mode
  * @rmtoll SCB_SCR      SLEEPDEEP     LL_LPM_EnableDeepSleep
  * @retval None
  */
__STATIC_INLINE void LL_LPM_EnableDeepSleep(void)
{
  /* Set SLEEPDEEP bit of Cortex System Control Register */
  SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
}

/**
  * @brief  Configures sleep-on-exit when returning from Handler mode to Thread mode.
  * @note   Setting this bit to 1 enables an interrupt-driven application to avoid returning to an
  *         empty main application.
  * @rmtoll SCB_SCR      SLEEPONEXIT   LL_LPM_EnableSleepOnExit
  * @retval None
  */
__STATIC_INLINE void LL_LPM_EnableSleepOnExit(void)
{
  /* Set SLEEPONEXIT bit of Cortex System Control Register */
  SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk));
}

/**
  * @brief  Do not sleep when returning to Thread mode.
  * @rmtoll SCB_SCR      SLEEPONEXIT   LL_LPM_DisableSleepOnExit
  * @retval None
  */
__STATIC_INLINE void LL_LPM_DisableSleepOnExit(void)
{
  /* Clear SLEEPONEXIT bit of Cortex System Control Register */
  CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPONEXIT_Msk));
}

/**
  * @brief  Enabled events and all interrupts, including disabled interrupts, can wakeup the
  *         processor.
  * @rmtoll SCB_SCR      SEVEONPEND    LL_LPM_EnableEventOnPend
  * @retval None
  */
__STATIC_INLINE void LL_LPM_EnableEventOnPend(void)
{
  /* Set SEVEONPEND bit of Cortex System Control Register */
  SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk));
}

/**
  * @brief  Only enabled interrupts or events can wakeup the processor, disabled interrupts are
  *         excluded
  * @rmtoll SCB_SCR      SEVEONPEND    LL_LPM_DisableEventOnPend
  * @retval None
  */
__STATIC_INLINE void LL_LPM_DisableEventOnPend(void)
{
  /* Clear SEVEONPEND bit of Cortex System Control Register */
  CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SEVONPEND_Msk));
}

/**
  * @}
  */

/** @defgroup CORTEX_LL_EF_MCU_INFO MCU INFO
  * @{
  */

/**
  * @brief  Get Implementer code
  * @rmtoll SCB_CPUID    IMPLEMENTER   LL_CPUID_GetImplementer
  * @retval Value should be equal to 0x41 for ARM
  */
__STATIC_INLINE uint32_t LL_CPUID_GetImplementer(void)
{
  return (uint32_t)(READ_BIT(SCB->CPUID, SCB_CPUID_IMPLEMENTER_Msk) >> SCB_CPUID_IMPLEMENTER_Pos);
}

/**
  * @brief  Get Variant number (The r value in the rnpn product revision identifier)
  * @rmtoll SCB_CPUID    VARIANT       LL_CPUID_GetVariant
  * @retval Value between 0 and 255 (0x0: revision 0)
  */
__STATIC_INLINE uint32_t LL_CPUID_GetVariant(void)
{
  return (uint32_t)(READ_BIT(SCB->CPUID, SCB_CPUID_VARIANT_Msk) >> SCB_CPUID_VARIANT_Pos);
}

/**
  * @brief  Get Architecture number 
  * @rmtoll SCB_CPUID    ARCHITECTURE  LL_CPUID_GetArchitecture
  * @retval Value should be equal to 0xC for Cortex-M0 devices
  */
__STATIC_INLINE uint32_t LL_CPUID_GetArchitecture(void)
{
  return (uint32_t)(READ_BIT(SCB->CPUID, SCB_CPUID_ARCHITECTURE_Msk) >> SCB_CPUID_ARCHITECTURE_Pos);
}

/**
  * @brief  Get Part number
  * @rmtoll SCB_CPUID    PARTNO        LL_CPUID_GetParNo
  * @retval Value should be equal to 0xC20 for Cortex-M0
  */
__STATIC_INLINE uint32_t LL_CPUID_GetParNo(void)
{
  return (uint32_t)(READ_BIT(SCB->CPUID, SCB_CPUID_PARTNO_Msk) >> SCB_CPUID_PARTNO_Pos);
}

/**
  * @brief  Get Revision number (The p value in the rnpn product revision identifier, indicates patch release)
  * @rmtoll SCB_CPUID    REVISION      LL_CPUID_GetRevision
  * @retval Value between 0 and 255 (0x1: patch 1)
  */
__STATIC_INLINE uint32_t LL_CPUID_GetRevision(void)
{
  return (uint32_t)(READ_BIT(SCB->CPUID, SCB_CPUID_REVISION_Msk) >> SCB_CPUID_REVISION_Pos);
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

#ifdef __cplusplus
}
#endif

#endif /* __STM32F0xx_LL_CORTEX_H */

