lib/main/STM32F1/Drivers/STM32F10x_StdPeriph_Driver/src/misc.c

   1 /**
   2   ******************************************************************************
   3   * @file    misc.c
   4   * @author  MCD Application Team
   5   * @version V3.5.0
   6   * @date    11-March-2011
   7   * @brief   This file provides all the miscellaneous firmware functions (add-on
   8   *          to CMSIS functions).
   9   ******************************************************************************
  10   * @attention
  11   *
  12   * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  13   * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  14   * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  15   * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  16   * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  17   * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  18   *
  19   * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  20   ******************************************************************************
  21   */
  22
  23 /* Includes ------------------------------------------------------------------*/
  24 #include "misc.h"
  25
  26 /** @addtogroup STM32F10x_StdPeriph_Driver
  27   * @{
  28   */
  29
  30 /** @defgroup MISC
  31   * @brief MISC driver modules
  32   * @{
  33   */
  34
  35 /** @defgroup MISC_Private_TypesDefinitions
  36   * @{
  37   */
  38
  39 /**
  40   * @}
  41   */
  42
  43 /** @defgroup MISC_Private_Defines
  44   * @{
  45   */
  46
  47 #define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)
  48 /**
  49   * @}
  50   */
  51
  52 /** @defgroup MISC_Private_Macros
  53   * @{
  54   */
  55
  56 /**
  57   * @}
  58   */
  59
  60 /** @defgroup MISC_Private_Variables
  61   * @{
  62   */
  63
  64 /**
  65   * @}
  66   */
  67
  68 /** @defgroup MISC_Private_FunctionPrototypes
  69   * @{
  70   */
  71
  72 /**
  73   * @}
  74   */
  75
  76 /** @defgroup MISC_Private_Functions
  77   * @{
  78   */
  79
  80 /**
  81   * @brief  Configures the priority grouping: pre-emption priority and subpriority.
  82   * @param  NVIC_PriorityGroup: specifies the priority grouping bits length.
  83   *   This parameter can be one of the following values:
  84   *     @arg NVIC_PriorityGroup_0: 0 bits for pre-emption priority
  85   *                                4 bits for subpriority
  86   *     @arg NVIC_PriorityGroup_1: 1 bits for pre-emption priority
  87   *                                3 bits for subpriority
  88   *     @arg NVIC_PriorityGroup_2: 2 bits for pre-emption priority
  89   *                                2 bits for subpriority
  90   *     @arg NVIC_PriorityGroup_3: 3 bits for pre-emption priority
  91   *                                1 bits for subpriority
  92   *     @arg NVIC_PriorityGroup_4: 4 bits for pre-emption priority
  93   *                                0 bits for subpriority
  94   * @retval None
  95   */
  96 void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
  97 {
  98   /* Check the parameters */
  99   assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));
 100
 101   /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
 102   SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
 103 }
 104
 105 /**
 106   * @brief  Initializes the NVIC peripheral according to the specified
 107   *         parameters in the NVIC_InitStruct.
 108   * @param  NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains
 109   *         the configuration information for the specified NVIC peripheral.
 110   * @retval None
 111   */
 112 void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
 113 {
 114   uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;
 115
 116   /* Check the parameters */
 117   assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
 118   assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));
 119   assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
 120
 121   if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
 122   {
 123     /* Compute the Corresponding IRQ Priority --------------------------------*/
 124     tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
 125     tmppre = (0x4 - tmppriority);
 126     tmpsub = tmpsub >> tmppriority;
 127
 128     tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
 129     tmppriority |=  NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
 130     tmppriority = tmppriority << 0x04;
 131
 132     NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
 133
 134     /* Enable the Selected IRQ Channels --------------------------------------*/
 135     NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
 136       (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
 137   }
 138   else
 139   {
 140     /* Disable the Selected IRQ Channels -------------------------------------*/
 141     NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
 142       (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
 143   }
 144 }
 145
 146 /**
 147   * @brief  Sets the vector table location and Offset.
 148   * @param  NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.
 149   *   This parameter can be one of the following values:
 150   *     @arg NVIC_VectTab_RAM
 151   *     @arg NVIC_VectTab_FLASH
 152   * @param  Offset: Vector Table base offset field. This value must be a multiple
 153   *         of 0x200.
 154   * @retval None
 155   */
 156 void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset)
 157 {
 158   /* Check the parameters */
 159   assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));
 160   assert_param(IS_NVIC_OFFSET(Offset));
 161
 162   SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);
 163 }
 164
 165 /**
 166   * @brief  Selects the condition for the system to enter low power mode.
 167   * @param  LowPowerMode: Specifies the new mode for the system to enter low power mode.
 168   *   This parameter can be one of the following values:
 169   *     @arg NVIC_LP_SEVONPEND
 170   *     @arg NVIC_LP_SLEEPDEEP
 171   *     @arg NVIC_LP_SLEEPONEXIT
 172   * @param  NewState: new state of LP condition. This parameter can be: ENABLE or DISABLE.
 173   * @retval None
 174   */
 175 void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState)
 176 {
 177   /* Check the parameters */
 178   assert_param(IS_NVIC_LP(LowPowerMode));
 179   assert_param(IS_FUNCTIONAL_STATE(NewState));
 180
 181   if (NewState != DISABLE)
 182   {
 183     SCB->SCR |= LowPowerMode;
 184   }
 185   else
 186   {
 187     SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);
 188   }
 189 }
 190
 191 /**
 192   * @brief  Configures the SysTick clock source.
 193   * @param  SysTick_CLKSource: specifies the SysTick clock source.
 194   *   This parameter can be one of the following values:
 195   *     @arg SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8 selected as SysTick clock source.
 196   *     @arg SysTick_CLKSource_HCLK: AHB clock selected as SysTick clock source.
 197   * @retval None
 198   */
 199 void SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)
 200 {
 201   /* Check the parameters */
 202   assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));
 203   if (SysTick_CLKSource == SysTick_CLKSource_HCLK)
 204   {
 205     SysTick->CTRL |= SysTick_CLKSource_HCLK;
 206   }
 207   else
 208   {
 209     SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;
 210   }
 211 }
 212
 213 /**
 214   * @}
 215   */
 216
 217 /**
 218   * @}
 219   */
 220
 221 /**
 222   * @}
 223   */
 224
 225 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/