misc_mort.c

00001 /**
00002   ******************************************************************************
00003   * @file    misc.c
00004   * @author  MCD Application Team
00005   * @version V1.8.0
00006   * @date    04-November-2016
00007   * @brief   This file provides all the miscellaneous firmware functions (add-on
00008   *          to CMSIS functions).
00009   *          
00010   *  @verbatim   
00011   *                               
00012   *          ===================================================================      
00013   *                        How to configure Interrupts using driver 
00014   *          ===================================================================      
00015   * 
00016   *            This section provide functions allowing to configure the NVIC interrupts (IRQ).
00017   *            The Cortex-M4 exceptions are managed by CMSIS functions.
00018   *
00019   *            1. Configure the NVIC Priority Grouping using NVIC_PriorityGroupConfig_mort()
00020   *                function according to the following table.
00021  
00022   *  The table below gives the allowed values of the pre-emption priority and subpriority according
00023   *  to the Priority Grouping configuration performed by NVIC_PriorityGroupConfig_mort function
00024   *    ==========================================================================================================================
00025   *      NVIC_PriorityGroup   | NVIC_IRQChannelPreemptionPriority | NVIC_IRQChannelSubPriority  |       Description
00026   *    ==========================================================================================================================
00027   *     NVIC_PriorityGroup_0_MORT  |                0                  |            0-15             | 0 bits for pre-emption priority
00028   *                           |                                   |                             | 4 bits for subpriority
00029   *    --------------------------------------------------------------------------------------------------------------------------
00030   *     NVIC_PriorityGroup_1_MORT  |                0-1                |            0-7              | 1 bits for pre-emption priority
00031   *                           |                                   |                             | 3 bits for subpriority
00032   *    --------------------------------------------------------------------------------------------------------------------------    
00033   *     NVIC_PriorityGroup_2_MORT  |                0-3                |            0-3              | 2 bits for pre-emption priority
00034   *                           |                                   |                             | 2 bits for subpriority
00035   *    --------------------------------------------------------------------------------------------------------------------------    
00036   *     NVIC_PriorityGroup_3_MORT  |                0-7                |            0-1              | 3 bits for pre-emption priority
00037   *                           |                                   |                             | 1 bits for subpriority
00038   *    --------------------------------------------------------------------------------------------------------------------------    
00039   *     NVIC_PriorityGroup_4_MORT  |                0-15               |            0                | 4 bits for pre-emption priority
00040   *                           |                                   |                             | 0 bits for subpriority                       
00041   *    ==========================================================================================================================     
00042   *
00043   *            2. Enable and Configure the priority of the selected IRQ Channels using NVIC_Init_mort()  
00044   *
00045   * @note  When the NVIC_PriorityGroup_0_MORT is selected, IRQ pre-emption is no more possible. 
00046   *        The pending IRQ priority will be managed only by the subpriority.
00047   *
00048   * @note  IRQ priority order (sorted by highest to lowest priority):
00049   *         - Lowest pre-emption priority
00050   *         - Lowest subpriority
00051   *         - Lowest hardware priority (IRQ number)
00052   *
00053   *  @endverbatim
00054   *
00055   ******************************************************************************
00056   * @attention
00057   *
00058   * <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
00059   *
00060   * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
00061   * You may not use this file except in compliance with the License.
00062   * You may obtain a copy of the License at:
00063   *
00064   *        http://www.st.com/software_license_agreement_liberty_v2
00065   *
00066   * Unless required by applicable law or agreed to in writing, software 
00067   * distributed under the License is distributed on an "AS IS" BASIS, 
00068   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00069   * See the License for the specific language governing permissions and
00070   * limitations under the License.
00071   *
00072   ******************************************************************************
00073   */
00074 
00075 /* Includes ------------------------------------------------------------------*/
00076 #include "misc_mort.h"
00077 
00078 /** @addtogroup STM32F4xx_StdPeriph_Driver
00079   * @{
00080   */
00081 
00082 /** @defgroup MISC 
00083   * @brief MISC driver modules
00084   * @{
00085   */
00086 
00087 /* Private typedef -----------------------------------------------------------*/
00088 /* Private define ------------------------------------------------------------*/
00089 #define AIRCR_VECTKEY_MASK    ((uint32_t)0x05FA0000)
00090 
00091 /* Private macro -------------------------------------------------------------*/
00092 /* Private variables ---------------------------------------------------------*/
00093 /* Private function prototypes -----------------------------------------------*/
00094 /* Private functions ---------------------------------------------------------*/
00095 
00096 /** @defgroup MISC_Private_Functions
00097   * @{
00098   */
00099 
00100 /**
00101   * @brief  Configures the priority grouping: pre-emption priority and subpriority.
00102   * @param  NVIC_PriorityGroup: specifies the priority grouping bits length. 
00103   *   This parameter can be one of the following values:
00104   *     @arg NVIC_PriorityGroup_0_MORT: 0 bits for pre-emption priority
00105   *                                4 bits for subpriority
00106   *     @arg NVIC_PriorityGroup_1_MORT: 1 bits for pre-emption priority
00107   *                                3 bits for subpriority
00108   *     @arg NVIC_PriorityGroup_2_MORT: 2 bits for pre-emption priority
00109   *                                2 bits for subpriority
00110   *     @arg NVIC_PriorityGroup_3_MORT: 3 bits for pre-emption priority
00111   *                                1 bits for subpriority
00112   *     @arg NVIC_PriorityGroup_4_MORT: 4 bits for pre-emption priority
00113   *                                0 bits for subpriority
00114   * @note   When the NVIC_PriorityGroup_0_MORT is selected, IRQ pre-emption is no more possible. 
00115   *         The pending IRQ priority will be managed only by the subpriority. 
00116   * @retval None
00117   */
00118 void NVIC_PriorityGroupConfig_mort(uint32_t NVIC_PriorityGroup)
00119 {
00120   /* Check the parameters */
00121   assert_param(IS_NVIC_PRIORITY_GROUP_MORT(NVIC_PriorityGroup));
00122   
00123   /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */
00124   SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;
00125 }
00126 
00127 /**
00128   * @brief  Initializes the NVIC peripheral according to the specified
00129   *         parameters in the NVIC_InitStruct.
00130   * @note   To configure interrupts priority correctly, the NVIC_PriorityGroupConfig_mort()
00131   *         function should be called before. 
00132   * @param  NVIC_InitStruct: pointer to a NVIC_InitTypeDef_mort structure that contains
00133   *         the configuration information for the specified NVIC peripheral.
00134   * @retval None
00135   */
00136 void NVIC_Init_mort(NVIC_InitTypeDef_mort* NVIC_InitStruct)
00137 {
00138   uint8_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;
00139   
00140   /* Check the parameters */
00141   assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
00142   assert_param(IS_NVIC_PREEMPTION_PRIORITY_MORT(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));  
00143   assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));
00144     
00145   if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
00146   {
00147     /* Compute the Corresponding IRQ Priority --------------------------------*/    
00148     tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
00149     tmppre = (0x4 - tmppriority);
00150     tmpsub = tmpsub >> tmppriority;
00151 
00152     tmppriority = NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
00153     tmppriority |=  (uint8_t)(NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub);
00154         
00155     tmppriority = tmppriority << 0x04;
00156         
00157     NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;
00158     
00159     /* Enable the Selected IRQ Channels --------------------------------------*/
00160     NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
00161       (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
00162   }
00163   else
00164   {
00165     /* Disable the Selected IRQ Channels -------------------------------------*/
00166     NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =
00167       (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);
00168   }
00169 }
00170 
00171 /**
00172   * @brief  Sets the vector table location and Offset.
00173   * @param  NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.
00174   *   This parameter can be one of the following values:
00175   *     @arg NVIC_VectTab_RAM_MORT: Vector Table in internal SRAM.
00176   *     @arg NVIC_VectTab_FLASH_MORT: Vector Table in internal FLASH.
00177   * @param  Offset: Vector Table base offset field. This value must be a multiple of 0x200.
00178   * @retval None
00179   */
00180 void NVIC_SetVectorTable_mort(uint32_t NVIC_VectTab, uint32_t Offset)
00181 { 
00182   /* Check the parameters */
00183   assert_param(IS_NVIC_VECTTAB_MORT(NVIC_VectTab));
00184   assert_param(IS_NVIC_OFFSET_MORT(Offset));  
00185    
00186   SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);
00187 }
00188 
00189 /**
00190   * @brief  Selects the condition for the system to enter low power mode.
00191   * @param  LowPowerMode: Specifies the new mode for the system to enter low power mode.
00192   *   This parameter can be one of the following values:
00193   *     @arg NVIC_LP_SEVONPEND_MORT: Low Power SEV on Pend.
00194   *     @arg NVIC_LP_SLEEPDEEP_MORT: Low Power DEEPSLEEP request.
00195   *     @arg NVIC_LP_SLEEPONEXIT_MORT: Low Power Sleep on Exit.
00196   * @param  NewState: new state of LP condition. This parameter can be: ENABLE or DISABLE.
00197   * @retval None
00198   */
00199 void NVIC_SystemLPConfig_mort(uint8_t LowPowerMode, FunctionalState NewState)
00200 {
00201   /* Check the parameters */
00202   assert_param(IS_NVIC_LP_MORT(LowPowerMode));
00203   assert_param(IS_FUNCTIONAL_STATE(NewState));  
00204   
00205   if (NewState != DISABLE)
00206   {
00207     SCB->SCR |= LowPowerMode;
00208   }
00209   else
00210   {
00211     SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);
00212   }
00213 }
00214 
00215 /**
00216   * @brief  Configures the SysTick clock source.
00217   * @param  SysTick_CLKSource: specifies the SysTick clock source.
00218   *   This parameter can be one of the following values:
00219   *     @arg SysTick_CLKSource_HCLK_Div8_MORT: AHB clock divided by 8 selected as SysTick clock source.
00220   *     @arg SysTick_CLKSource_HCLK_MORT: AHB clock selected as SysTick clock source.
00221   * @retval None
00222   */
00223 void SysTick_CLKSourceConfig_mort(uint32_t SysTick_CLKSource)
00224 {
00225   /* Check the parameters */
00226   assert_param(IS_SYSTICK_CLK_SOURCE_MORT(SysTick_CLKSource));
00227   if (SysTick_CLKSource == SysTick_CLKSource_HCLK_MORT)
00228   {
00229     SysTick->CTRL |= SysTick_CLKSource_HCLK_MORT;
00230   }
00231   else
00232   {
00233     SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8_MORT;
00234   }
00235 }
00236 
00237 /**
00238   * @}
00239   */
00240 
00241 /**
00242   * @}
00243   */
00244 
00245 /**
00246   * @}
00247   */
00248 
00249 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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