www.pudn.com > STM32F103C8T6-I0_LED.zip > misc.c, change:2009-04-06,size:6874b


/** 
  ****************************************************************************** 
  * @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>© 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****/