| /** | |
| ****************************************************************************** | |
| * @file misc.c | |
| * @author MCD Application Team | |
| * @version V1.1.1 | |
| * @date 05-March-2012 | |
| * @brief This file provides all the miscellaneous firmware functions (add-on | |
| * to CMSIS functions). | |
| ****************************************************************************** | |
| * @attention | |
| * | |
| * <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2> | |
| * | |
| * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); | |
| * You may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at: | |
| * | |
| * http://www.st.com/software_license_agreement_liberty_v2 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| * | |
| ****************************************************************************** | |
| */ | |
| /* Includes ------------------------------------------------------------------*/ | |
| #include "misc.h" | |
| /** @addtogroup STM32L1xx_StdPeriph_Driver | |
| * @{ | |
| */ | |
| /** @defgroup MISC | |
| * @brief MISC driver modules | |
| * @{ | |
| */ | |
| /* Private typedef -----------------------------------------------------------*/ | |
| /* Private define ------------------------------------------------------------*/ | |
| #define AIRCR_VECTKEY_MASK ((uint32_t)0x05FA0000) | |
| /* Private macro -------------------------------------------------------------*/ | |
| /* Private variables ---------------------------------------------------------*/ | |
| /* Private function prototypes -----------------------------------------------*/ | |
| /* Private functions ---------------------------------------------------------*/ | |
| /** @defgroup MISC_Private_Functions | |
| * @{ | |
| */ | |
| /** | |
| * | |
| @verbatim | |
| ******************************************************************************* | |
| ##### Interrupts configuration functions ##### | |
| ******************************************************************************* | |
| [..] This section provide functions allowing to configure the NVIC interrupts | |
| (IRQ).The Cortex-M3 exceptions are managed by CMSIS functions. | |
| (#) Configure the NVIC Priority Grouping using NVIC_PriorityGroupConfig() | |
| function according to the following table. | |
| The table below gives the allowed values of the preemption priority | |
| and subpriority according to the Priority Grouping configuration | |
| performed by NVIC_PriorityGroupConfig function. | |
| ============================================================================================================================ | |
| NVIC_PriorityGroup | NVIC_IRQChannelPreemptionPriority | NVIC_IRQChannelSubPriority | Description | |
| ============================================================================================================================ | |
| NVIC_PriorityGroup_0 | 0 | 0-15 | 0 bits for preemption priority | |
| | | | 4 bits for subpriority | |
| ---------------------------------------------------------------------------------------------------------------------------- | |
| NVIC_PriorityGroup_1 | 0-1 | 0-7 | 1 bits for preemption priority | |
| | | | 3 bits for subpriority | |
| ---------------------------------------------------------------------------------------------------------------------------- | |
| NVIC_PriorityGroup_2 | 0-3 | 0-3 | 2 bits for preemption priority | |
| | | | 2 bits for subpriority | |
| ---------------------------------------------------------------------------------------------------------------------------- | |
| NVIC_PriorityGroup_3 | 0-7 | 0-1 | 3 bits for preemption priority | |
| | | | 1 bits for subpriority | |
| ---------------------------------------------------------------------------------------------------------------------------- | |
| NVIC_PriorityGroup_4 | 0-15 | 0 | 4 bits for preemption priority | |
| | | | 0 bits for subpriority | |
| ============================================================================================================================ | |
| (#) Enable and Configure the priority of the selected IRQ Channels. | |
| -@- When the NVIC_PriorityGroup_0 is selected, it will no any nested interrupt, | |
| the IRQ priority will be managed only by subpriority. | |
| The sub-priority is only used to sort pending exception priorities, | |
| and does not affect active exceptions. | |
| -@- Lower priority values gives higher priority. | |
| -@- Priority Order: | |
| (#@) Lowest Preemption priority. | |
| (#@) Lowest Subpriority. | |
| (#@) Lowest hardware priority (IRQn position). | |
| @endverbatim | |
| */ | |
| /** | |
| * @brief Configures the priority grouping: preemption 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 preemption priority | |
| * 4 bits for subpriority. | |
| * @note When NVIC_PriorityGroup_0 is selected, it will no be any nested | |
| * interrupt. This interrupts priority is managed only with subpriority. | |
| * @arg NVIC_PriorityGroup_1: 1 bits for preemption priority. | |
| * 3 bits for subpriority. | |
| * @arg NVIC_PriorityGroup_2: 2 bits for preemption priority. | |
| * 2 bits for subpriority. | |
| * @arg NVIC_PriorityGroup_3: 3 bits for preemption priority. | |
| * 1 bits for subpriority. | |
| * @arg NVIC_PriorityGroup_4: 4 bits for preemption 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. | |
| * @note To configure interrupts priority correctly, the NVIC_PriorityGroupConfig() | |
| * function should be called before. | |
| * @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) | |
| { | |
| uint8_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 |= (uint8_t)(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: Vector Table in internal SRAM. | |
| * @arg NVIC_VectTab_FLASH: Vector Table in internal FLASH. | |
| * @param Offset: Vector Table base offset field. This value must be a multiple of 0x200. | |
| * @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: Low Power SEV on Pend. | |
| * @arg NVIC_LP_SLEEPDEEP: Low Power DEEPSLEEP request. | |
| * @arg NVIC_LP_SLEEPONEXIT: Low Power Sleep on Exit. | |
| * @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 STMicroelectronics *****END OF FILE****/ |