| /** |
| ****************************************************************************** |
| * @file stm32l0xx_hal_cortex.c |
| * @author MCD Application Team |
| * @brief CORTEX HAL module driver. |
| * This file provides firmware functions to manage the following |
| * functionalities of the CORTEX: |
| * + Initialization and Configuration functions |
| * + Peripheral Control functions |
| * |
| @verbatim |
| ============================================================================== |
| ##### How to use this driver ##### |
| ============================================================================== |
| [..] |
| *** How to configure Interrupts using CORTEX HAL driver *** |
| =========================================================== |
| [..] |
| This section provides functions allowing to configure the NVIC interrupts (IRQ). |
| The Cortex M0+ exceptions are managed by CMSIS functions. |
| (#) Enable and Configure the priority of the selected IRQ Channels. |
| The priority can be 0..3. |
| |
| -@- Lower priority values gives higher priority. |
| -@- Priority Order: |
| (#@) Lowest priority. |
| (#@) Lowest hardware priority (IRQn position). |
| |
| (#) Configure the priority of the selected IRQ Channels using HAL_NVIC_SetPriority() |
| |
| (#) Enable the selected IRQ Channels using HAL_NVIC_EnableIRQ() |
| |
| [..] |
| *** How to configure Systick using CORTEX HAL driver *** |
| ======================================================== |
| [..] |
| Setup SysTick Timer for time base. |
| |
| (+) The HAL_SYSTICK_Config()function calls the SysTick_Config() function which |
| is a CMSIS function that: |
| (++) Configures the SysTick Reload register with value passed as function parameter. |
| (++) Configures the SysTick IRQ priority to the lowest value (0x03). |
| (++) Resets the SysTick Counter register. |
| (++) Configures the SysTick Counter clock source to be Core Clock Source (HCLK). |
| (++) Enables the SysTick Interrupt. |
| (++) Starts the SysTick Counter. |
| |
| (+) You can change the SysTick Clock source to be HCLK_Div8 by calling the function |
| HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK_DIV8) just after the |
| HAL_SYSTICK_Config() function call. The HAL_SYSTICK_CLKSourceConfig() function is defined |
| inside the stm32l0xx_hal_cortex.c file. |
| |
| (+) You can change the SysTick IRQ priority by calling the |
| HAL_NVIC_SetPriority(SysTick_IRQn,...) function just after the HAL_SYSTICK_Config() function |
| call. The HAL_NVIC_SetPriority() call the NVIC_SetPriority() function which is a CMSIS function. |
| |
| (+) To adjust the SysTick time base, use the following formula: |
| |
| Reload Value = SysTick Counter Clock (Hz) x Desired Time base (s) |
| (++) Reload Value is the parameter to be passed for HAL_SYSTICK_Config() function |
| (++) Reload Value should not exceed 0xFFFFFF |
| |
| @endverbatim |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2016 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file in |
| * the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l0xx_hal.h" |
| |
| /** @addtogroup STM32L0xx_HAL_Driver |
| * @{ |
| */ |
| |
| #ifdef HAL_CORTEX_MODULE_ENABLED |
| |
| /** @addtogroup CORTEX |
| * @brief CORTEX HAL module driver |
| * @{ |
| */ |
| |
| /* Private types -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| /* Private constants ---------------------------------------------------------*/ |
| /* Private macros ------------------------------------------------------------*/ |
| /* Private functions ---------------------------------------------------------*/ |
| /* Exported functions --------------------------------------------------------*/ |
| |
| /** @addtogroup CORTEX_Exported_Functions |
| * @{ |
| */ |
| |
| |
| /** @addtogroup CORTEX_Exported_Functions_Group1 |
| * @brief Initialization and Configuration functions |
| * |
| @verbatim |
| ============================================================================== |
| ##### Initialization and Configuration functions ##### |
| ============================================================================== |
| [..] |
| This section provides the CORTEX HAL driver functions allowing to configure Interrupts |
| Systick functionalities |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Sets the priority of an interrupt. |
| * @param IRQn External interrupt number . |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @param PreemptPriority The pre-emption priority for the IRQn channel. |
| * This parameter can be a value between 0 and 3. |
| * A lower priority value indicates a higher priority |
| * @param SubPriority the subpriority level for the IRQ channel. |
| * with stm32l0xx devices, this parameter is a dummy value and it is ignored, because |
| * no subpriority supported in Cortex M0+ based products. |
| * @retval None |
| */ |
| void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority) |
| { |
| /* Check the parameters */ |
| assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority)); |
| NVIC_SetPriority(IRQn,PreemptPriority); |
| |
| /* Prevent unused argument(s) compilation warning */ |
| UNUSED(SubPriority); |
| |
| } |
| |
| /** |
| * @brief Enable a device specific interrupt in the NVIC interrupt controller. |
| * @note To configure interrupts priority correctly, the NVIC_PriorityGroupConfig() |
| * function should be called before. |
| * @param IRQn External interrupt number . |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @retval None |
| */ |
| void HAL_NVIC_EnableIRQ(IRQn_Type IRQn) |
| { |
| /* Check the parameters */ |
| assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
| |
| /* Enable interrupt */ |
| NVIC_EnableIRQ(IRQn); |
| } |
| |
| /** |
| * @brief Disable a device specific interrupt in the NVIC interrupt controller. |
| * @param IRQn External interrupt number . |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @retval None |
| */ |
| void HAL_NVIC_DisableIRQ(IRQn_Type IRQn) |
| { |
| /* Check the parameters */ |
| assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
| |
| /* Disable interrupt */ |
| NVIC_DisableIRQ(IRQn); |
| } |
| |
| /** |
| * @brief Initiate a system reset request to reset the MCU. |
| * @retval None |
| */ |
| void HAL_NVIC_SystemReset(void) |
| { |
| /* System Reset */ |
| NVIC_SystemReset(); |
| } |
| |
| /** |
| * @brief Initialize the System Timer with interrupt enabled and start the System Tick Timer (SysTick) |
| * Counter is in free running mode to generate periodic interrupts. |
| * @param TicksNumb Specifies the ticks Number of ticks between two interrupts. |
| * @retval status: - 0 Function succeeded. |
| * - 1 Function failed. |
| */ |
| uint32_t HAL_SYSTICK_Config(uint32_t TicksNumb) |
| { |
| return SysTick_Config(TicksNumb); |
| } |
| /** |
| * @} |
| */ |
| |
| /** @addtogroup CORTEX_Exported_Functions_Group2 Peripheral Control functions |
| * @brief Cortex control functions |
| * |
| @verbatim |
| ============================================================================== |
| ##### Peripheral Control functions ##### |
| ============================================================================== |
| [..] |
| This subsection provides a set of functions allowing to control the CORTEX |
| (NVIC, SYSTICK) functionalities. |
| |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| |
| /** |
| * @brief Gets the priority of an interrupt. |
| * @param IRQn External interrupt number. |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32l0xxxx.h)) |
| * @retval None |
| */ |
| uint32_t HAL_NVIC_GetPriority(IRQn_Type IRQn) |
| { |
| /* Get priority for Cortex-M system or device specific interrupts */ |
| return NVIC_GetPriority(IRQn); |
| } |
| |
| /** |
| * @brief Sets Pending bit of an external interrupt. |
| * @param IRQn External interrupt number |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @retval None |
| */ |
| void HAL_NVIC_SetPendingIRQ(IRQn_Type IRQn) |
| { |
| /* Set interrupt pending */ |
| NVIC_SetPendingIRQ(IRQn); |
| } |
| |
| /** |
| * @brief Get Pending Interrupt (read the pending register in the NVIC |
| * and return the pending bit for the specified interrupt). |
| * @param IRQn External interrupt number . |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @retval status: - 0 Interrupt status is not pending. |
| * - 1 Interrupt status is pending. |
| */ |
| uint32_t HAL_NVIC_GetPendingIRQ(IRQn_Type IRQn) |
| { |
| /* Return 1 if pending else 0 */ |
| return NVIC_GetPendingIRQ(IRQn); |
| } |
| |
| /** |
| * @brief Clear the pending bit of an external interrupt. |
| * @param IRQn External interrupt number . |
| * This parameter can be an enumerator of IRQn_Type enumeration |
| * (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file) |
| * @retval None |
| */ |
| void HAL_NVIC_ClearPendingIRQ(IRQn_Type IRQn) |
| { |
| /* Clear pending interrupt */ |
| NVIC_ClearPendingIRQ(IRQn); |
| } |
| |
| |
| /** |
| * @brief Configure the SysTick clock source. |
| * @param 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 HAL_SYSTICK_CLKSourceConfig(uint32_t CLKSource) |
| { |
| /* Check the parameters */ |
| assert_param(IS_SYSTICK_CLK_SOURCE(CLKSource)); |
| if (CLKSource == SYSTICK_CLKSOURCE_HCLK) |
| { |
| SysTick->CTRL |= SYSTICK_CLKSOURCE_HCLK; |
| } |
| else |
| { |
| SysTick->CTRL &= ~SYSTICK_CLKSOURCE_HCLK; |
| } |
| } |
| |
| /** |
| * @brief Handle SYSTICK interrupt request. |
| * @retval None |
| */ |
| void HAL_SYSTICK_IRQHandler(void) |
| { |
| HAL_SYSTICK_Callback(); |
| } |
| |
| /** |
| * @brief SYSTICK callback. |
| * @retval None |
| */ |
| __weak void HAL_SYSTICK_Callback(void) |
| { |
| /* NOTE : This function should not be modified, when the callback is needed, |
| the HAL_SYSTICK_Callback could be implemented in the user file |
| */ |
| } |
| |
| #if (__MPU_PRESENT == 1U) |
| /** |
| * @brief Disable the MPU. |
| * @retval None |
| */ |
| void HAL_MPU_Disable(void) |
| { |
| |
| /*Data Memory Barrier setup */ |
| __DMB(); |
| /* Disable the MPU */ |
| MPU->CTRL = 0; |
| } |
| |
| /** |
| * @brief Enable the MPU. |
| * @param MPU_Control Specifies the control mode of the MPU during hard fault, |
| * NMI, FAULTMASK and privileged access to the default memory |
| * This parameter can be one of the following values: |
| * @arg MPU_HFNMI_PRIVDEF_NONE |
| * @arg MPU_HARDFAULT_NMI |
| * @arg MPU_PRIVILEGED_DEFAULT |
| * @arg MPU_HFNMI_PRIVDEF |
| * @retval None |
| */ |
| |
| void HAL_MPU_Enable(uint32_t MPU_Control) |
| { |
| /* Enable the MPU */ |
| MPU->CTRL = MPU_Control | MPU_CTRL_ENABLE_Msk; |
| /* Data Synchronization Barrier setup */ |
| __DSB(); |
| /* Instruction Synchronization Barrier setup */ |
| __ISB(); |
| |
| } |
| |
| /** |
| * @brief Initialize and configure the Region and the memory to be protected. |
| * @param MPU_Init Pointer to a MPU_Region_InitTypeDef structure that contains |
| * the initialization and configuration information. |
| * @retval None |
| */ |
| void HAL_MPU_ConfigRegion(MPU_Region_InitTypeDef *MPU_Init) |
| { |
| /* Check the parameters */ |
| assert_param(IS_MPU_REGION_NUMBER(MPU_Init->Number)); |
| assert_param(IS_MPU_REGION_ENABLE(MPU_Init->Enable)); |
| |
| /* Follow ARM recommendation with Data Memory Barrier prior to MPU configuration */ |
| __DMB(); |
| |
| /* Set the Region number */ |
| MPU->RNR = MPU_Init->Number; |
| |
| if ((MPU_Init->Enable) == MPU_REGION_ENABLE) |
| { |
| /* Check the parameters */ |
| assert_param(IS_MPU_INSTRUCTION_ACCESS(MPU_Init->DisableExec)); |
| assert_param(IS_MPU_REGION_PERMISSION_ATTRIBUTE(MPU_Init->AccessPermission)); |
| assert_param(IS_MPU_ACCESS_SHAREABLE(MPU_Init->IsShareable)); |
| assert_param(IS_MPU_ACCESS_CACHEABLE(MPU_Init->IsCacheable)); |
| assert_param(IS_MPU_ACCESS_BUFFERABLE(MPU_Init->IsBufferable)); |
| assert_param(IS_MPU_SUB_REGION_DISABLE(MPU_Init->SubRegionDisable)); |
| assert_param(IS_MPU_REGION_SIZE(MPU_Init->Size)); |
| |
| /* Set the base adsress and set the 4 LSB to 0 */ |
| MPU->RBAR = (MPU_Init->BaseAddress) & 0xfffffff0U; |
| |
| /* Fill the field RASR */ |
| MPU->RASR = ((uint32_t)MPU_Init->DisableExec << MPU_RASR_XN_Pos) | |
| ((uint32_t)MPU_Init->AccessPermission << MPU_RASR_AP_Pos) | |
| ((uint32_t)MPU_Init->IsShareable << MPU_RASR_S_Pos) | |
| ((uint32_t)MPU_Init->IsCacheable << MPU_RASR_C_Pos) | |
| ((uint32_t)MPU_Init->IsBufferable << MPU_RASR_B_Pos) | |
| ((uint32_t)MPU_Init->SubRegionDisable << MPU_RASR_SRD_Pos) | |
| ((uint32_t)MPU_Init->Size << MPU_RASR_SIZE_Pos) | |
| ((uint32_t)MPU_Init->Enable << MPU_RASR_ENABLE_Pos); |
| } |
| else |
| { |
| MPU->RBAR = 0x00U; |
| MPU->RASR = 0x00U; |
| } |
| } |
| #endif /* __MPU_PRESENT */ |
| |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_CORTEX_MODULE_ENABLED */ |
| /** |
| * @} |
| */ |
| |
| |