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/**

  ******************************************************************************

  * @file    stm32l1xx_hal_cortex.c

  * @author  MCD Application Team

  * @brief   CORTEX HAL module driver.

  *

  *          This file provides firmware functions to manage the following

  *          functionalities of the CORTEX:

  *           + Initialization and de-initialization functions

  *           + Peripheral Control functions

  *          

  *  @verbatim    

  ==============================================================================

                        ##### How to use this driver #####

  ==============================================================================

    [..]  

    *** How to configure Interrupts using Cortex HAL driver ***

    ===========================================================

    [..]    

    This section provide functions allowing to configure the NVIC interrupts (IRQ).

    The Cortex-M3 exceptions are managed by CMSIS functions.

    (#) Configure the NVIC Priority Grouping using HAL_NVIC_SetPriorityGrouping() function

     (#)  Configure the priority of the selected IRQ Channels using HAL_NVIC_SetPriority()

     (#)  Enable the selected IRQ Channels using HAL_NVIC_EnableIRQ()

     -@- When the NVIC_PRIORITYGROUP_0 is selected, IRQ pre-emption is no more possible.

         The pending IRQ priority will be managed only by the sub priority.

     -@- IRQ priority order (sorted by highest to lowest priority):

        (+@) Lowest pre-emption priority

        (+@) Lowest sub priority

        (+@) Lowest hardware priority (IRQ number)

    [..]  

    *** How to configure Systick using Cortex HAL driver ***

    ========================================================

    [..]

    Setup SysTick Timer for 1 msec interrupts.

   (+) The HAL_SYSTICK_Config()function calls the SysTick_Config() function which

       is a CMSIS function that:

        (++) Configures the SysTick Reload register with value passed as function parameter.

        (++) Configures the SysTick IRQ priority to the lowest value (0x0F).

        (++) Resets the SysTick Counter register.

        (++) Configures the SysTick Counter clock source to be Core Clock Source (HCLK).

        (++) Enables the SysTick Interrupt.

        (++) Starts the SysTick Counter.

   (+) You can change the SysTick Clock source to be HCLK_Div8 by calling the macro

       __HAL_CORTEX_SYSTICKCLK_CONFIG(SYSTICK_CLKSOURCE_HCLK_DIV8) just after the

       HAL_SYSTICK_Config() function call. The __HAL_CORTEX_SYSTICKCLK_CONFIG() macro is defined

       inside the stm32l1xx_hal_cortex.h file.

   (+) You can change the SysTick IRQ priority by calling the

       HAL_NVIC_SetPriority(SysTick_IRQn,...) function just after the HAL_SYSTICK_Config() function

       call. The HAL_NVIC_SetPriority() call the NVIC_SetPriority() function which is a CMSIS function.

   (+) To adjust the SysTick time base, use the following formula:

       Reload Value = SysTick Counter Clock (Hz) x  Desired Time base (s)

       (++) Reload Value is the parameter to be passed for HAL_SYSTICK_Config() function

       (++) Reload Value should not exceed 0xFFFFFF

  @endverbatim

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2017 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.

  *

  ******************************************************************************

  */

/*

  Additional Tables: CORTEX_NVIC_Priority_Table

     The table below gives the allowed values of the pre-emption priority and subpriority according

     to the Priority Grouping configuration performed by HAL_NVIC_SetPriorityGrouping() function.

       ==========================================================================================================================

         NVIC_PriorityGroup   | NVIC_IRQChannelPreemptionPriority | NVIC_IRQChannelSubPriority  |       Description

       ==========================================================================================================================

        NVIC_PRIORITYGROUP_0  |                0                  |            0-15             | 0 bits for pre-emption priority

                              |                                   |                             | 4 bits for subpriority

       --------------------------------------------------------------------------------------------------------------------------

        NVIC_PRIORITYGROUP_1  |                0-1                |            0-7              | 1 bits for pre-emption priority

                              |                                   |                             | 3 bits for subpriority

       --------------------------------------------------------------------------------------------------------------------------    

        NVIC_PRIORITYGROUP_2  |                0-3                |            0-3              | 2 bits for pre-emption priority

                              |                                   |                             | 2 bits for subpriority

       --------------------------------------------------------------------------------------------------------------------------    

        NVIC_PRIORITYGROUP_3  |                0-7                |            0-1              | 3 bits for pre-emption priority

                              |                                   |                             | 1 bits for subpriority

       --------------------------------------------------------------------------------------------------------------------------    

        NVIC_PRIORITYGROUP_4  |                0-15               |            0                | 4 bits for pre-emption priority

                              |                                   |                             | 0 bits for subpriority                      

       ==========================================================================================================================

*/

/* Includes ------------------------------------------------------------------*/

#include "stm32l1xx_hal.h"

/** @addtogroup STM32L1xx_HAL_Driver

  * @{

  */

/** @defgroup CORTEX CORTEX

  * @brief CORTEX HAL module driver

  * @{

  */

#ifdef HAL_CORTEX_MODULE_ENABLED

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

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

/* Private macro -------------------------------------------------------------*/

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

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

/** @defgroup CORTEX_Exported_Functions CORTEX Exported Functions

  * @{

  */

/** @defgroup CORTEX_Exported_Functions_Group1 Initialization and de-initialization functions

 *  @brief    Initialization and Configuration functions

 *

@verbatim    

  ==============================================================================

              ##### Initialization and de-initialization functions #####

  ==============================================================================

    [..]

      This section provide the Cortex HAL driver functions allowing to configure Interrupts

      Systick functionalities

@endverbatim

  * @{

  */

/**

  * @brief  Sets the priority grouping field (pre-emption priority and subpriority)

  *         using the required unlock sequence.

  * @param  PriorityGroup The priority grouping bits length.

  *         This parameter can be one of the following values:

  *         @arg NVIC_PRIORITYGROUP_0: 0 bits for pre-emption priority

  *                                    4 bits for subpriority

  *         @arg NVIC_PRIORITYGROUP_1: 1 bits for pre-emption priority

  *                                    3 bits for subpriority

  *         @arg NVIC_PRIORITYGROUP_2: 2 bits for pre-emption priority

  *                                    2 bits for subpriority

  *         @arg NVIC_PRIORITYGROUP_3: 3 bits for pre-emption priority

  *                                    1 bits for subpriority

  *         @arg NVIC_PRIORITYGROUP_4: 4 bits for pre-emption priority

  *                                    0 bits for subpriority

  * @note   When the NVIC_PriorityGroup_0 is selected, IRQ pre-emption is no more possible.

  *         The pending IRQ priority will be managed only by the subpriority.

  * @retval None

  */

void HAL_NVIC_SetPriorityGrouping(uint32_t PriorityGroup)

{

  /* Check the parameters */

  assert_param(IS_NVIC_PRIORITY_GROUP(PriorityGroup));

  /* Set the PRIGROUP[10:8] bits according to the PriorityGroup parameter value */

  NVIC_SetPriorityGrouping(PriorityGroup);

}

/**

  * @brief  Sets the priority of an interrupt.

  * @param  IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xx.h))

  * @param  PreemptPriority The pre-emption priority for the IRQn channel.

  *         This parameter can be a value between 0 and 15

  *         A lower priority value indicates a higher priority

  * @param  SubPriority the subpriority level for the IRQ channel.

  *         This parameter can be a value between 0 and 15

  *         A lower priority value indicates a higher priority.          

  * @retval None

  */

void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)

{

  uint32_t prioritygroup = 0x00;

  /* Check the parameters */

  assert_param(IS_NVIC_SUB_PRIORITY(SubPriority));

  assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority));

  prioritygroup = NVIC_GetPriorityGrouping();

  NVIC_SetPriority(IRQn, NVIC_EncodePriority(prioritygroup, PreemptPriority, SubPriority));

}

/**

  * @brief  Enables a device specific interrupt in the NVIC interrupt controller.

  * @note   To configure interrupts priority correctly, the NVIC_PriorityGroupConfig()

  *         function should be called before.

  * @param  IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xx.h))

  * @retval None

  */

void HAL_NVIC_EnableIRQ(IRQn_Type IRQn)

{

  /* Check the parameters */

  assert_param(IS_NVIC_DEVICE_IRQ(IRQn));

  /* Enable interrupt */

  NVIC_EnableIRQ(IRQn);

}

/**

  * @brief  Disables a device specific interrupt in the NVIC interrupt controller.

  * @param  IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))  

  * @retval None

  */

void HAL_NVIC_DisableIRQ(IRQn_Type IRQn)

{

  /* Check the parameters */

  assert_param(IS_NVIC_DEVICE_IRQ(IRQn));

  /* Disable interrupt */

  NVIC_DisableIRQ(IRQn);

}

/**

  * @brief  Initiates a system reset request to reset the MCU.

  * @retval None

  */

void HAL_NVIC_SystemReset(void)

{

  /* System Reset */

  NVIC_SystemReset();

}

/**

  * @brief  Initializes the System Timer and its interrupt, and starts the System Tick Timer.

  *         Counter is in free running mode to generate periodic interrupts.

  * @param  TicksNumb Specifies the ticks Number of ticks between two interrupts.

  * @retval status:  - 0  Function succeeded.

  *                  - 1  Function failed.

  */

uint32_t HAL_SYSTICK_Config(uint32_t TicksNumb)

{

   return SysTick_Config(TicksNumb);

}

/**

  * @}

  */

/** @defgroup CORTEX_Exported_Functions_Group2 Peripheral Control functions

 *  @brief    Cortex control functions

 *

@verbatim  

  ==============================================================================

                      ##### Peripheral Control functions #####

  ==============================================================================

    [..]

      This subsection provides a set of functions allowing to control the CORTEX

      (NVIC, SYSTICK, MPU) functionalities.

@endverbatim

  * @{

  */

#if (__MPU_PRESENT == 1)

/**

  * @brief  Enable the MPU.

  * @param  MPU_Control Specifies the control mode of the MPU during hard fault,

  *          NMI, FAULTMASK and privileged accessto the default memory

  *          This parameter can be one of the following values:

  *            @arg MPU_HFNMI_PRIVDEF_NONE

  *            @arg MPU_HARDFAULT_NMI

  *            @arg MPU_PRIVILEGED_DEFAULT

  *            @arg MPU_HFNMI_PRIVDEF

  * @retval None

  */

void HAL_MPU_Enable(uint32_t MPU_Control)

{

  /* Enable the MPU */

  MPU->CTRL = (MPU_Control | MPU_CTRL_ENABLE_Msk);

  /* Ensure MPU setting take effects */

  __DSB();

  __ISB();

}

/**

  * @brief  Disable the MPU.

  * @retval None

  */

void HAL_MPU_Disable(void)

{

  /* Make sure outstanding transfers are done */

  __DMB();

  /* Disable the MPU and clear the control register*/

  MPU->CTRL  = 0;

}

/**

  * @brief  Initializes and configures the Region and the memory to be protected.

  * @param  MPU_Init Pointer to a MPU_Region_InitTypeDef structure that contains

  *                the initialization and configuration information.

  * @retval None

  */

void HAL_MPU_ConfigRegion(MPU_Region_InitTypeDef *MPU_Init)

{

  /* Check the parameters */

  assert_param(IS_MPU_REGION_NUMBER(MPU_Init->Number));

  assert_param(IS_MPU_REGION_ENABLE(MPU_Init->Enable));

  /* Set the Region number */

  MPU->RNR = MPU_Init->Number;

  if ((MPU_Init->Enable) != RESET)

  {

    /* Check the parameters */

    assert_param(IS_MPU_INSTRUCTION_ACCESS(MPU_Init->DisableExec));

    assert_param(IS_MPU_REGION_PERMISSION_ATTRIBUTE(MPU_Init->AccessPermission));

    assert_param(IS_MPU_TEX_LEVEL(MPU_Init->TypeExtField));

    assert_param(IS_MPU_ACCESS_SHAREABLE(MPU_Init->IsShareable));

    assert_param(IS_MPU_ACCESS_CACHEABLE(MPU_Init->IsCacheable));

    assert_param(IS_MPU_ACCESS_BUFFERABLE(MPU_Init->IsBufferable));

    assert_param(IS_MPU_SUB_REGION_DISABLE(MPU_Init->SubRegionDisable));

    assert_param(IS_MPU_REGION_SIZE(MPU_Init->Size));

    MPU->RBAR = MPU_Init->BaseAddress;

    MPU->RASR = ((uint32_t)MPU_Init->DisableExec             << MPU_RASR_XN_Pos)   |

                ((uint32_t)MPU_Init->AccessPermission        << MPU_RASR_AP_Pos)   |

                ((uint32_t)MPU_Init->TypeExtField            << MPU_RASR_TEX_Pos)  |

                ((uint32_t)MPU_Init->IsShareable             << MPU_RASR_S_Pos)    |

                ((uint32_t)MPU_Init->IsCacheable             << MPU_RASR_C_Pos)    |

                ((uint32_t)MPU_Init->IsBufferable            << MPU_RASR_B_Pos)    |

                ((uint32_t)MPU_Init->SubRegionDisable        << MPU_RASR_SRD_Pos)  |

                ((uint32_t)MPU_Init->Size                    << MPU_RASR_SIZE_Pos) |

                ((uint32_t)MPU_Init->Enable                  << MPU_RASR_ENABLE_Pos);

  }

  else

  {

    MPU->RBAR = 0x00;

    MPU->RASR = 0x00;

  }

}

#endif /* __MPU_PRESENT */

/**

  * @brief  Gets the priority grouping field from the NVIC Interrupt Controller.

  * @retval Priority grouping field (SCB->AIRCR [10:8] PRIGROUP field)

  */

uint32_t HAL_NVIC_GetPriorityGrouping(void)

{

  /* Get the PRIGROUP[10:8] field value */

  return NVIC_GetPriorityGrouping();

}

/**

  * @brief  Gets the priority of an interrupt.

  * @param  IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))

  * @param  PriorityGroup the priority grouping bits length.

  *         This parameter can be one of the following values:

  *           @arg NVIC_PRIORITYGROUP_0: 0 bits for pre-emption priority

  *                                      4 bits for subpriority

  *           @arg NVIC_PRIORITYGROUP_1: 1 bits for pre-emption priority

  *                                      3 bits for subpriority

  *           @arg NVIC_PRIORITYGROUP_2: 2 bits for pre-emption priority

  *                                      2 bits for subpriority

  *           @arg NVIC_PRIORITYGROUP_3: 3 bits for pre-emption priority

  *                                      1 bits for subpriority

  *           @arg NVIC_PRIORITYGROUP_4: 4 bits for pre-emption priority

  *                                      0 bits for subpriority

  * @param  pPreemptPriority Pointer on the Preemptive priority value (starting from 0).

  * @param  pSubPriority Pointer on the Subpriority value (starting from 0).

  * @retval None

  */

void HAL_NVIC_GetPriority(IRQn_Type IRQn, uint32_t PriorityGroup, uint32_t* pPreemptPriority, uint32_t* pSubPriority)

{

  /* Check the parameters */

  assert_param(IS_NVIC_PRIORITY_GROUP(PriorityGroup));

 /* Get priority for Cortex-M system or device specific interrupts */

  NVIC_DecodePriority(NVIC_GetPriority(IRQn), PriorityGroup, pPreemptPriority, pSubPriority);

}

/**

  * @brief  Sets Pending bit of an external interrupt.

  * @param  IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))  

  * @retval None

  */

void HAL_NVIC_SetPendingIRQ(IRQn_Type IRQn)

{

  /* Set interrupt pending */

  NVIC_SetPendingIRQ(IRQn);

}

/**

  * @brief Gets Pending Interrupt (reads the pending register in the NVIC

  *         and returns the pending bit for the specified interrupt).

  * @param IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))  

  * @retval status: - 0  Interrupt status is not pending.

  *                 - 1  Interrupt status is pending.

  */

uint32_t HAL_NVIC_GetPendingIRQ(IRQn_Type IRQn)

{

  /* Return 1 if pending else 0 */

  return NVIC_GetPendingIRQ(IRQn);

}

/**

  * @brief Clears the pending bit of an external interrupt.

  * @param IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))  

  * @retval None

  */

void HAL_NVIC_ClearPendingIRQ(IRQn_Type IRQn)

{

  /* Clear pending interrupt */

  NVIC_ClearPendingIRQ(IRQn);

}

/**

  * @brief Gets active interrupt ( reads the active register in NVIC and returns the active bit).

  * @param IRQn External interrupt number

  *         This parameter can be an enumerator of IRQn_Type enumeration

  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l1xxxx.h))  

  * @retval status: - 0  Interrupt status is not pending.

  *                 - 1  Interrupt status is pending.

  */

uint32_t HAL_NVIC_GetActive(IRQn_Type IRQn)

{

  /* Return 1 if active else 0 */

  return NVIC_GetActive(IRQn);

}

/**

  * @brief  Configures the SysTick clock source.

  * @param  CLKSource specifies the SysTick clock source.

  *         This parameter can be one of the following values:

  *             @arg SYSTICK_CLKSOURCE_HCLK_DIV8: AHB clock divided by 8 selected as SysTick clock source.

  *             @arg SYSTICK_CLKSOURCE_HCLK: AHB clock selected as SysTick clock source.

  * @retval None

  */

void HAL_SYSTICK_CLKSourceConfig(uint32_t CLKSource)

{

  /* Check the parameters */

  assert_param(IS_SYSTICK_CLK_SOURCE(CLKSource));

  if (CLKSource == SYSTICK_CLKSOURCE_HCLK)

  {

    SysTick->CTRL |= SYSTICK_CLKSOURCE_HCLK;

  }

  else

  {

    SysTick->CTRL &= ~SYSTICK_CLKSOURCE_HCLK;

  }

}

/**

  * @brief  This function handles SYSTICK interrupt request.

  * @retval None

  */

void HAL_SYSTICK_IRQHandler(void)

{

  HAL_SYSTICK_Callback();

}

/**

  * @brief  SYSTICK callback.

  * @retval None

  */

__weak void HAL_SYSTICK_Callback(void)

{

  /* NOTE : This function Should not be modified, when the callback is needed,

            the HAL_SYSTICK_Callback could be implemented in the user file

   */

}

/**

  * @}

  */

/**

  * @}

  */

#endif /* HAL_CORTEX_MODULE_ENABLED */

/**

  * @}

  */

/**

  * @}

  */