/**
  ******************************************************************************
  * @file    misc.c
  * @author  MCD Application Team
  * @version V3.6.1
  * @date    05-March-2012
  * @brief   This file provides all the miscellaneous firmware functions (add-on
  *          to CMSIS functions).
 *******************************************************************************
 * Copyright (c) 2014, STMicroelectronics
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of STMicroelectronics nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *******************************************************************************
 */

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

/** @addtogroup STM32F10x_StdPeriph_Driver
  * @{
  */

/** @defgroup MISC 
  * @brief MISC driver modules
  * @{
  */

/** @defgroup MISC_Private_TypesDefinitions
  * @{
  */

/**
  * @}
  */ 

/** @defgroup MISC_Private_Defines
  * @{
  */

#define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)
/**
  * @}
  */

/** @defgroup MISC_Private_Macros
  * @{
  */

/**
  * @}
  */

/** @defgroup MISC_Private_Variables
  * @{
  */

/**
  * @}
  */

/** @defgroup MISC_Private_FunctionPrototypes
  * @{
  */

/**
  * @}
  */

/** @defgroup MISC_Private_Functions
  * @{
  */

/**
  * @brief  Configures the priority grouping: pre-emption priority and subpriority.
  * @param  NVIC_PriorityGroup: specifies 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
  * @retval None
  */
void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
{
  /* Check the parameters */
  assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));
  
  /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
  SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
}

/**
  * @brief  Initializes the NVIC peripheral according to the specified
  *         parameters in the NVIC_InitStruct.
  * @param  NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains
  *         the configuration information for the specified NVIC peripheral.
  * @retval None
  */
void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
{
  uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;
  
  /* Check the parameters */
  assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
  assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));  
  assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
    
  if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
  {
    /* Compute the Corresponding IRQ Priority --------------------------------*/    
    tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
    tmppre = (0x4 - tmppriority);
    tmpsub = tmpsub >> tmppriority;

    tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
    tmppriority |=  NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
    tmppriority = tmppriority << 0x04;
        
    NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
    
    /* Enable the Selected IRQ Channels --------------------------------------*/
    NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
      (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
  }
  else
  {
    /* Disable the Selected IRQ Channels -------------------------------------*/
    NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
      (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
  }
}

/**
  * @brief  Sets the vector table location and Offset.
  * @param  NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.
  *   This parameter can be one of the following values:
  *     @arg NVIC_VectTab_RAM
  *     @arg NVIC_VectTab_FLASH
  * @param  Offset: Vector Table base offset field. This value must be a multiple 
  *         of 0x200.
  * @retval None
  */
void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset)
{ 
  /* Check the parameters */
  assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));
  assert_param(IS_NVIC_OFFSET(Offset));  
   
  SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);
}

/**
  * @brief  Selects the condition for the system to enter low power mode.
  * @param  LowPowerMode: Specifies the new mode for the system to enter low power mode.
  *   This parameter can be one of the following values:
  *     @arg NVIC_LP_SEVONPEND
  *     @arg NVIC_LP_SLEEPDEEP
  *     @arg NVIC_LP_SLEEPONEXIT
  * @param  NewState: new state of LP condition. This parameter can be: ENABLE or DISABLE.
  * @retval None
  */
void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState)
{
  /* Check the parameters */
  assert_param(IS_NVIC_LP(LowPowerMode));
  assert_param(IS_FUNCTIONAL_STATE(NewState));  
  
  if (NewState != DISABLE)
  {
    SCB->SCR |= LowPowerMode;
  }
  else
  {
    SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);
  }
}

/**
  * @brief  Configures the SysTick clock source.
  * @param  SysTick_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 SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)
{
  /* Check the parameters */
  assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
  if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
  {
    SysTick->CTRL |= SysTick_CLKSource_HCLK;
  }
  else
  {
    SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
  }
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
