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/** |
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****************************************************************************** |
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* @file stm32f0xx_hal_cortex.c |
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* @author MCD Application Team |
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* @brief CORTEX HAL module driver. |
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* This file provides firmware functions to manage the following |
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* functionalities of the CORTEX: |
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* + Initialization and de-initialization functions |
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* + Peripheral Control functions |
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* |
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* @verbatim |
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============================================================================== |
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##### How to use this driver ##### |
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============================================================================== |
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[..] |
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*** How to configure Interrupts using CORTEX HAL driver *** |
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=========================================================== |
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[..] |
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This section provides functions allowing to configure the NVIC interrupts (IRQ). |
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The Cortex-M0 exceptions are managed by CMSIS functions. |
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(#) Enable and Configure the priority of the selected IRQ Channels. |
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The priority can be 0..3. |
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-@- Lower priority values gives higher priority. |
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-@- Priority Order: |
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(#@) Lowest priority. |
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(#@) Lowest hardware priority (IRQn position). |
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(#) Configure the priority of the selected IRQ Channels using HAL_NVIC_SetPriority() |
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(#) Enable the selected IRQ Channels using HAL_NVIC_EnableIRQ() |
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-@- Negative value of IRQn_Type are not allowed. |
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[..] |
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*** How to configure Systick using CORTEX HAL driver *** |
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======================================================== |
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[..] |
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Setup SysTick Timer for time base. |
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(+) The HAL_SYSTICK_Config()function calls the SysTick_Config() function which |
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is a CMSIS function that: |
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(++) Configures the SysTick Reload register with value passed as function parameter. |
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(++) Configures the SysTick IRQ priority to the lowest value (0x03). |
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(++) Resets the SysTick Counter register. |
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(++) Configures the SysTick Counter clock source to be Core Clock Source (HCLK). |
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(++) Enables the SysTick Interrupt. |
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(++) Starts the SysTick Counter. |
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(+) You can change the SysTick Clock source to be HCLK_Div8 by calling the macro |
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HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK_DIV8) just after the |
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HAL_SYSTICK_Config() function call. The HAL_SYSTICK_CLKSourceConfig() macro is defined |
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inside the stm32f0xx_hal_cortex.h file. |
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(+) You can change the SysTick IRQ priority by calling the |
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HAL_NVIC_SetPriority(SysTick_IRQn,...) function just after the HAL_SYSTICK_Config() function |
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call. The HAL_NVIC_SetPriority() call the NVIC_SetPriority() function which is a CMSIS function. |
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(+) To adjust the SysTick time base, use the following formula: |
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Reload Value = SysTick Counter Clock (Hz) x Desired Time base (s) |
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(++) Reload Value is the parameter to be passed for HAL_SYSTICK_Config() function |
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(++) Reload Value should not exceed 0xFFFFFF |
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@endverbatim |
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****************************************************************************** |
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* @attention |
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* |
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
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* |
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* Redistribution and use in source and binary forms, with or without modification, |
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* are permitted provided that the following conditions are met: |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* 3. Neither the name of STMicroelectronics nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************** |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f0xx_hal.h" |
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/** @addtogroup STM32F0xx_HAL_Driver |
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* @{ |
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*/ |
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/** @defgroup CORTEX CORTEX |
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* @brief CORTEX CORTEX HAL module driver |
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* @{ |
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*/ |
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#ifdef HAL_CORTEX_MODULE_ENABLED |
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/* Private typedef -----------------------------------------------------------*/ |
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/* Private define ------------------------------------------------------------*/ |
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/* Private macro -------------------------------------------------------------*/ |
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/* Private variables ---------------------------------------------------------*/ |
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/* Private function prototypes -----------------------------------------------*/ |
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/* Exported functions ---------------------------------------------------------*/ |
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/** @defgroup CORTEX_Exported_Functions CORTEX Exported Functions |
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* @{ |
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*/ |
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/** @defgroup CORTEX_Exported_Functions_Group1 Initialization and de-initialization functions |
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* @brief Initialization and Configuration functions |
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* |
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@verbatim |
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============================================================================== |
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##### Initialization and de-initialization functions ##### |
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============================================================================== |
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[..] |
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This section provides the CORTEX HAL driver functions allowing to configure Interrupts |
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Systick functionalities |
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@endverbatim |
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* @{ |
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*/ |
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/** |
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* @brief Sets the priority of an interrupt. |
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* @param IRQn External interrupt number . |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to stm32f0xx.h file) |
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* @param PreemptPriority The preemption priority for the IRQn channel. |
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* This parameter can be a value between 0 and 3. |
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* A lower priority value indicates a higher priority |
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* @param SubPriority the subpriority level for the IRQ channel. |
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* with stm32f0xx devices, this parameter is a dummy value and it is ignored, because |
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* no subpriority supported in Cortex M0 based products. |
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* @retval None |
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*/ |
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void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority)); |
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NVIC_SetPriority(IRQn,PreemptPriority); |
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} |
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/** |
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* @brief Enables a device specific interrupt in the NVIC interrupt controller. |
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* @note To configure interrupts priority correctly, the NVIC_PriorityGroupConfig() |
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* function should be called before. |
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* @param IRQn External interrupt number. |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval None |
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*/ |
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void HAL_NVIC_EnableIRQ(IRQn_Type IRQn) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
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/* Enable interrupt */ |
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NVIC_EnableIRQ(IRQn); |
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} |
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/** |
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* @brief Disables a device specific interrupt in the NVIC interrupt controller. |
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* @param IRQn External interrupt number. |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval None |
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*/ |
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void HAL_NVIC_DisableIRQ(IRQn_Type IRQn) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
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/* Disable interrupt */ |
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NVIC_DisableIRQ(IRQn); |
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} |
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/** |
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* @brief Initiates a system reset request to reset the MCU. |
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* @retval None |
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*/ |
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void HAL_NVIC_SystemReset(void) |
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{ |
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/* System Reset */ |
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NVIC_SystemReset(); |
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} |
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/** |
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* @brief Initializes the System Timer and its interrupt, and starts the System Tick Timer. |
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* Counter is in free running mode to generate periodic interrupts. |
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* @param TicksNumb Specifies the ticks Number of ticks between two interrupts. |
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* @retval status: - 0 Function succeeded. |
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* - 1 Function failed. |
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*/ |
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uint32_t HAL_SYSTICK_Config(uint32_t TicksNumb) |
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{ |
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return SysTick_Config(TicksNumb); |
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} |
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/** |
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* @} |
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*/ |
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/** @defgroup CORTEX_Exported_Functions_Group2 Peripheral Control functions |
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* @brief Cortex control functions |
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* |
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@verbatim |
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============================================================================== |
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##### Peripheral Control functions ##### |
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============================================================================== |
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[..] |
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This subsection provides a set of functions allowing to control the CORTEX |
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(NVIC, SYSTICK) functionalities. |
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@endverbatim |
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* @{ |
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*/ |
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/** |
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* @brief Gets the priority of an interrupt. |
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* @param IRQn External interrupt number. |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval None |
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*/ |
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uint32_t HAL_NVIC_GetPriority(IRQn_Type IRQn) |
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{ |
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/* Get priority for Cortex-M system or device specific interrupts */ |
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return NVIC_GetPriority(IRQn); |
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} |
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/** |
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* @brief Sets Pending bit of an external interrupt. |
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* @param IRQn External interrupt number |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval None |
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*/ |
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void HAL_NVIC_SetPendingIRQ(IRQn_Type IRQn) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
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/* Set interrupt pending */ |
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NVIC_SetPendingIRQ(IRQn); |
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} |
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/** |
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* @brief Gets Pending Interrupt (reads the pending register in the NVIC |
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* and returns the pending bit for the specified interrupt). |
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* @param IRQn External interrupt number. |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval status: - 0 Interrupt status is not pending. |
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* - 1 Interrupt status is pending. |
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*/ |
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uint32_t HAL_NVIC_GetPendingIRQ(IRQn_Type IRQn) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
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/* Return 1 if pending else 0 */ |
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return NVIC_GetPendingIRQ(IRQn); |
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} |
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/** |
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* @brief Clears the pending bit of an external interrupt. |
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* @param IRQn External interrupt number. |
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* This parameter can be an enumerator of IRQn_Type enumeration |
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* (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f0xxxx.h)) |
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* @retval None |
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*/ |
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void HAL_NVIC_ClearPendingIRQ(IRQn_Type IRQn) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_NVIC_DEVICE_IRQ(IRQn)); |
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/* Clear pending interrupt */ |
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NVIC_ClearPendingIRQ(IRQn); |
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} |
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/** |
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* @brief Configures the SysTick clock source. |
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* @param CLKSource specifies the SysTick clock source. |
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* This parameter can be one of the following values: |
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* @arg SYSTICK_CLKSOURCE_HCLK_DIV8: AHB clock divided by 8 selected as SysTick clock source. |
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* @arg SYSTICK_CLKSOURCE_HCLK: AHB clock selected as SysTick clock source. |
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* @retval None |
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*/ |
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void HAL_SYSTICK_CLKSourceConfig(uint32_t CLKSource) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_SYSTICK_CLK_SOURCE(CLKSource)); |
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if (CLKSource == SYSTICK_CLKSOURCE_HCLK) |
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{ |
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SysTick->CTRL |= SYSTICK_CLKSOURCE_HCLK; |
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} |
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else |
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{ |
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SysTick->CTRL &= ~SYSTICK_CLKSOURCE_HCLK; |
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} |
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} |
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/** |
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* @brief This function handles SYSTICK interrupt request. |
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* @retval None |
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*/ |
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void HAL_SYSTICK_IRQHandler(void) |
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{ |
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HAL_SYSTICK_Callback(); |
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} |
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/** |
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* @brief SYSTICK callback. |
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* @retval None |
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*/ |
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__weak void HAL_SYSTICK_Callback(void) |
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{ |
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/* NOTE : This function Should not be modified, when the callback is needed, |
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the HAL_SYSTICK_Callback could be implemented in the user file |
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*/ |
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} |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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#endif /* HAL_CORTEX_MODULE_ENABLED */ |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |