Subversion Repositories openrisc_2011-10-31

/**

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

  * @file  misc.c

  * @author  MCD Application Team

  * @version  V3.0.0

  * @date  04/06/2009

  * @brief  This file provides all the miscellaneous firmware functions.

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

  * @copy

  *

  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE

  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY

  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING

  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE

  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

  *

  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>

  */

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

#include "misc.h"

/** @addtogroup 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 0x100.

  * @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 2009 STMicroelectronics *****END OF FILE****/