--- /dev/null
+/**\r
+ ******************************************************************************\r
+ * @file misc.c\r
+ * @author MCD Application Team\r
+ * @version V1.0.0\r
+ * @date 31-December-2010\r
+ * @brief This file provides all the miscellaneous firmware functions (add-on\r
+ * to CMSIS functions).\r
+ ******************************************************************************\r
+ * @attention\r
+ *\r
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS\r
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE\r
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY\r
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING\r
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE\r
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.\r
+ *\r
+ * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>\r
+ ****************************************************************************** \r
+ */ \r
+\r
+/* Includes ------------------------------------------------------------------*/\r
+#include "misc.h"\r
+\r
+/** @addtogroup STM32L1xx_StdPeriph_Driver\r
+ * @{\r
+ */\r
+\r
+/** @defgroup MISC \r
+ * @brief MISC driver modules\r
+ * @{\r
+ */\r
+\r
+/* Private typedef -----------------------------------------------------------*/\r
+/* Private define ------------------------------------------------------------*/\r
+#define AIRCR_VECTKEY_MASK ((uint32_t)0x05FA0000)\r
+\r
+/* Private macro -------------------------------------------------------------*/\r
+/* Private variables ---------------------------------------------------------*/\r
+/* Private function prototypes -----------------------------------------------*/\r
+/* Private functions ---------------------------------------------------------*/\r
+\r
+/** @defgroup MISC_Private_Functions\r
+ * @{\r
+ */\r
+/**\r
+ *\r
+@verbatim \r
+ *******************************************************************************\r
+ Interrupts configuration functions\r
+ ******************************************************************************* \r
+ \r
+ This section provide functions allowing to configure the NVIC interrupts (IRQ).\r
+ The Cortex-M3 exceptions are managed by CMSIS functions.\r
+ \r
+ 1. Configure the NVIC Priority Grouping using NVIC_PriorityGroupConfig() function\r
+ according to the following table.\r
+ \r
+ The table below gives the allowed values of the pre-emption priority and subpriority according\r
+ to the Priority Grouping configuration performed by NVIC_PriorityGroupConfig function\r
+ ============================================================================================================================\r
+ NVIC_PriorityGroup | NVIC_IRQChannelPreemptionPriority | NVIC_IRQChannelSubPriority | Description\r
+ ============================================================================================================================\r
+ NVIC_PriorityGroup_0 | 0 | 0-15 | 0 bits for pre-emption priority\r
+ | | | 4 bits for subpriority\r
+ ----------------------------------------------------------------------------------------------------------------------------\r
+ NVIC_PriorityGroup_1 | 0-1 | 0-7 | 1 bits for pre-emption priority\r
+ | | | 3 bits for subpriority\r
+ ---------------------------------------------------------------------------------------------------------------------------- \r
+ NVIC_PriorityGroup_2 | 0-3 | 0-3 | 2 bits for pre-emption priority\r
+ | | | 2 bits for subpriority\r
+ ---------------------------------------------------------------------------------------------------------------------------- \r
+ NVIC_PriorityGroup_3 | 0-7 | 0-1 | 3 bits for pre-emption priority\r
+ | | | 1 bits for subpriority\r
+ ---------------------------------------------------------------------------------------------------------------------------- \r
+ NVIC_PriorityGroup_4 | 0-15 | 0 | 4 bits for pre-emption priority\r
+ | | | 0 bits for subpriority \r
+ ============================================================================================================================ \r
+\r
+\r
+ 2. Enable and Configure the priority of the selected IRQ Channels. \r
+\r
+@note When the NVIC_PriorityGroup_0 is selected, it will no any nested interrupt,\r
+ the IRQ priority will be managed only by subpriority.\r
+ The sub-priority is only used to sort pending exception priorities, \r
+ and does not affect active exceptions.\r
+\r
+@note Lower priority values gives higher priority.\r
+\r
+@note Priority Order:\r
+ 1. Lowest Preemption priority\r
+ 2. Lowest Subpriority\r
+ 3. Lowest hardware priority (IRQn position)\r
+ \r
+@endverbatim\r
+*/\r
+\r
+/**\r
+ * @brief Configures the priority grouping: pre-emption priority and subpriority.\r
+ * @param NVIC_PriorityGroup: specifies the priority grouping bits length. \r
+ * This parameter can be one of the following values:\r
+ * @arg NVIC_PriorityGroup_0: 0 bits for pre-emption priority\r
+ * 4 bits for subpriority\r
+ * @note When NVIC_PriorityGroup_0 is selected, it will no be any nested \r
+ * interrupt. This interrupts priority is managed only with subpriority. \r
+ * @arg NVIC_PriorityGroup_1: 1 bits for pre-emption priority\r
+ * 3 bits for subpriority\r
+ * @arg NVIC_PriorityGroup_2: 2 bits for pre-emption priority\r
+ * 2 bits for subpriority\r
+ * @arg NVIC_PriorityGroup_3: 3 bits for pre-emption priority\r
+ * 1 bits for subpriority\r
+ * @arg NVIC_PriorityGroup_4: 4 bits for pre-emption priority\r
+ * 0 bits for subpriority\r
+ * @retval None\r
+ */\r
+void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_NVIC_PRIORITY_GROUP(NVIC_PriorityGroup));\r
+ \r
+ /* Set the PRIGROUP[10:8] bits according to NVIC_PriorityGroup value */\r
+ SCB->AIRCR = AIRCR_VECTKEY_MASK | NVIC_PriorityGroup;\r
+}\r
+\r
+/**\r
+ * @brief Initializes the NVIC peripheral according to the specified\r
+ * parameters in the NVIC_InitStruct.\r
+ * @note To configure interrupts priority correctly, the NVIC_PriorityGroupConfig()\r
+ * function should be called before. \r
+ * @param NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains\r
+ * the configuration information for the specified NVIC peripheral.\r
+ * @retval None\r
+ */\r
+void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)\r
+{\r
+ uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;\r
+ \r
+ /* Check the parameters */\r
+ assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));\r
+ assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority)); \r
+ assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));\r
+ \r
+ if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)\r
+ {\r
+ /* Compute the Corresponding IRQ Priority --------------------------------*/ \r
+ tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;\r
+ tmppre = (0x4 - tmppriority);\r
+ tmpsub = tmpsub >> tmppriority;\r
+\r
+ tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;\r
+ tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;\r
+ tmppriority = tmppriority << 0x04;\r
+ \r
+ NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;\r
+ \r
+ /* Enable the Selected IRQ Channels --------------------------------------*/\r
+ NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =\r
+ (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);\r
+ }\r
+ else\r
+ {\r
+ /* Disable the Selected IRQ Channels -------------------------------------*/\r
+ NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] =\r
+ (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Sets the vector table location and Offset.\r
+ * @param NVIC_VectTab: specifies if the vector table is in RAM or FLASH memory.\r
+ * This parameter can be one of the following values:\r
+ * @arg NVIC_VectTab_RAM\r
+ * @arg NVIC_VectTab_FLASH\r
+ * @param Offset: Vector Table base offset field. This value must be a multiple of 0x200.\r
+ * @retval None\r
+ */\r
+void NVIC_SetVectorTable(uint32_t NVIC_VectTab, uint32_t Offset)\r
+{ \r
+ /* Check the parameters */\r
+ assert_param(IS_NVIC_VECTTAB(NVIC_VectTab));\r
+ assert_param(IS_NVIC_OFFSET(Offset)); \r
+ \r
+ SCB->VTOR = NVIC_VectTab | (Offset & (uint32_t)0x1FFFFF80);\r
+}\r
+\r
+/**\r
+ * @brief Selects the condition for the system to enter low power mode.\r
+ * @param LowPowerMode: Specifies the new mode for the system to enter low power mode.\r
+ * This parameter can be one of the following values:\r
+ * @arg NVIC_LP_SEVONPEND\r
+ * @arg NVIC_LP_SLEEPDEEP\r
+ * @arg NVIC_LP_SLEEPONEXIT\r
+ * @param NewState: new state of LP condition. \r
+ * This parameter can be: ENABLE or DISABLE.\r
+ * @retval None\r
+ */\r
+void NVIC_SystemLPConfig(uint8_t LowPowerMode, FunctionalState NewState)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_NVIC_LP(LowPowerMode));\r
+ assert_param(IS_FUNCTIONAL_STATE(NewState)); \r
+ \r
+ if (NewState != DISABLE)\r
+ {\r
+ SCB->SCR |= LowPowerMode;\r
+ }\r
+ else\r
+ {\r
+ SCB->SCR &= (uint32_t)(~(uint32_t)LowPowerMode);\r
+ }\r
+}\r
+\r
+/**\r
+ * @brief Configures the SysTick clock source.\r
+ * @param SysTick_CLKSource: specifies the SysTick clock source.\r
+ * This parameter can be one of the following values:\r
+ * @arg SysTick_CLKSource_HCLK_Div8: AHB clock divided by 8 selected as SysTick clock source.\r
+ * @arg SysTick_CLKSource_HCLK: AHB clock selected as SysTick clock source.\r
+ * @retval None\r
+ */\r
+void SysTick_CLKSourceConfig(uint32_t SysTick_CLKSource)\r
+{\r
+ /* Check the parameters */\r
+ assert_param(IS_SYSTICK_CLK_SOURCE(SysTick_CLKSource));\r
+ \r
+ if (SysTick_CLKSource == SysTick_CLKSource_HCLK)\r
+ {\r
+ SysTick->CTRL |= SysTick_CLKSource_HCLK;\r
+ }\r
+ else\r
+ {\r
+ SysTick->CTRL &= SysTick_CLKSource_HCLK_Div8;\r
+ }\r
+}\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/**\r
+ * @}\r
+ */\r
+\r
+/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/\r
projects / fw / stlink / blobdiff