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源代码在线查看： misc.c
/**
******************************************************************************
* @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.
*
* © COPYRIGHT 2009 STMicroelectronics
*/
/* 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 tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
tmppriority = tmppriority
NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
/* Enable the Selected IRQ Channels --------------------------------------*/
NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
(uint32_t)0x01 NVIC_IRQChannel & (uint8_t)0x1F);
}
else
{
/* Disable the Selected IRQ Channels -------------------------------------*/
NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
(uint32_t)0x01 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****/
