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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F072RB/stm32f0xx_hal_cortex.c
- Committer:
- mbed_official
- Date:
- 2014-05-22
- Revision:
- 205:c41fc65bcfb4
- Child:
- 218:44081b78fdc2
File content as of revision 205:c41fc65bcfb4:
/** ****************************************************************************** * @file stm32f0xx_hal_cortex.c * @author MCD Application Team * @version V1.0.0 * @date 20-May-2014 * @brief CORTEX HAL module driver. * This file provides firmware functions to manage the following * functionalities of the CORTEX: * + Initialization and de-initialization 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 macro __HAL_CORTEX_SYSTICKCLK_CONFIG(SYSTICK_CLKSOURCE_HCLK_DIV8) just after the HAL_SYSTICK_Config() function call. The __HAL_CORTEX_SYSTICKCLK_CONFIG() macro is defined inside the stm32f0xx_hal_cortex.h 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 * * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f0xx_hal.h" /** @addtogroup STM32F0xx_HAL_Driver * @{ */ /** @defgroup CORTEX * @brief CORTEX HAL module driver * @{ */ #ifdef HAL_CORTEX_MODULE_ENABLED /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup CORTEX_Private_Functions * @{ */ /** @defgroup CORTEX_Group1 Initialization and de-initialization functions * @brief Initialization and Configuration functions * @verbatim ============================================================================== ##### Initialization and de-initialization 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 stm32f0xx 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); } /** * @brief Enables 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 the appropriate CMSIS device file (stm32f0xxxx.h)) * @retval None */ void HAL_NVIC_EnableIRQ(IRQn_Type IRQn) { /* Enable interrupt */ NVIC_EnableIRQ(IRQn); } /** * @brief Disables 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 the appropriate CMSIS device file (stm32f0xxxx.h)) * @retval None */ void HAL_NVIC_DisableIRQ(IRQn_Type IRQn) { /* Disable interrupt */ NVIC_DisableIRQ(IRQn); } /** * @brief Initiates a system reset request to reset the MCU. * @param None * @retval None */ void HAL_NVIC_SystemReset(void) { /* System Reset */ NVIC_SystemReset(); } /** * @brief Initializes the System Timer and its interrupt, and starts the System Tick Timer. * 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); } /** * @} */ /** @defgroup CORTEX_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 (stm32f0xxxx.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 the appropriate CMSIS device file (stm32f0xxxx.h)) * @retval None */ void HAL_NVIC_SetPendingIRQ(IRQn_Type IRQn) { /* Set interrupt pending */ NVIC_SetPendingIRQ(IRQn); } /** * @brief Gets Pending Interrupt (reads the pending register in the NVIC * and returns 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 the appropriate CMSIS device file (stm32f0xxxx.h)) * @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 Clears 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 the appropriate CMSIS device file (stm32f0xxxx.h)) * @retval None */ void HAL_NVIC_ClearPendingIRQ(IRQn_Type IRQn) { /* Clear pending interrupt */ NVIC_ClearPendingIRQ(IRQn); } /** * @brief Configures 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_CLKSOURCE(CLKSource)); if (CLKSource == SYSTICK_CLKSOURCE_HCLK) { SysTick->CTRL |= SYSTICK_CLKSOURCE_HCLK; } else { SysTick->CTRL &= ~SYSTICK_CLKSOURCE_HCLK; } } /** * @brief This function handles SYSTICK interrupt request. * @param None * @retval None */ void HAL_SYSTICK_IRQHandler(void) { HAL_SYSTICK_Callback(); } /** * @brief SYSTICK callback. * @param None * @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 */ } /** * @} */ /** * @} */ #endif /* HAL_CORTEX_MODULE_ENABLED */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/