| /** | |
| ****************************************************************************** | |
| * @file stm32l4xx_hal_comp.c | |
| * @author MCD Application Team | |
| * @version V1.6.0 | |
| * @date 28-October-2016 | |
| * @brief COMP HAL module driver. | |
| * This file provides firmware functions to manage the following | |
| * functionalities of the COMP peripheral: | |
| * + Initialization and de-initialization functions | |
| * + Start/Stop operation functions in polling mode | |
| * + Start/Stop operation functions in interrupt mode (through EXTI interrupt) | |
| * + Peripheral control functions | |
| * + Peripheral state functions | |
| * | |
| @verbatim | |
| ================================================================================ | |
| ##### COMP Peripheral features ##### | |
| ================================================================================ | |
| [..] | |
| The STM32L4xx device family integrates two analog comparators instances | |
| COMP1 and COMP2: | |
| (#) The COMP input minus (inverting input) and input plus (non inverting input) | |
| can be set to internal references or to GPIO pins | |
| (refer to GPIO list in reference manual). | |
| (#) The COMP output level is available using HAL_COMP_GetOutputLevel() | |
| and can be redirected to other peripherals: GPIO pins (in mode | |
| alternate functions for comparator), timers. | |
| (refer to GPIO list in reference manual). | |
| (#) Pairs of comparators instances can be combined in window mode | |
| (2 consecutive instances odd and even COMP<x> and COMP<x+1>). | |
| (#) The comparators have interrupt capability through the EXTI controller | |
| with wake-up from sleep and stop modes: | |
| (++) COMP1 is internally connected to EXTI Line 21 | |
| (++) COMP2 is internally connected to EXTI Line 22 | |
| From the corresponding IRQ handler, the right interrupt source can be retrieved | |
| using macro __HAL_COMP_COMP1_EXTI_GET_FLAG() and __HAL_COMP_COMP2_EXTI_GET_FLAG(). | |
| ##### How to use this driver ##### | |
| ================================================================================ | |
| [..] | |
| This driver provides functions to configure and program the comparator instances | |
| of STM32L4xx devices. | |
| To use the comparator, perform the following steps: | |
| (#) Initialize the COMP low level resources by implementing the HAL_COMP_MspInit(): | |
| (++) Configure the GPIO connected to comparator inputs plus and minus in analog mode | |
| using HAL_GPIO_Init(). | |
| (++) If needed, configure the GPIO connected to comparator output in alternate function mode | |
| using HAL_GPIO_Init(). | |
| (++) If required enable the COMP interrupt by configuring and enabling EXTI line in Interrupt mode and | |
| selecting the desired sensitivity level using HAL_GPIO_Init() function. After that enable the comparator | |
| interrupt vector using HAL_NVIC_EnableIRQ() function. | |
| (#) Configure the comparator using HAL_COMP_Init() function: | |
| (++) Select the input minus (inverting input) | |
| (++) Select the input plus (non-inverting input) | |
| (++) Select the hysteresis | |
| (++) Select the blanking source | |
| (++) Select the output polarity | |
| (++) Select the power mode | |
| (++) Select the window mode | |
| -@@- HAL_COMP_Init() calls internally __HAL_RCC_SYSCFG_CLK_ENABLE() | |
| to enable internal control clock of the comparators. | |
| However, this is a legacy strategy. In future STM32 families, | |
| COMP clock enable must be implemented by user in "HAL_COMP_MspInit()". | |
| Therefore, for compatibility anticipation, it is recommended to | |
| implement __HAL_RCC_SYSCFG_CLK_ENABLE() in "HAL_COMP_MspInit()". | |
| (#) Reconfiguration on-the-fly of comparator can be done by calling again | |
| function HAL_COMP_Init() with new input structure parameters values. | |
| (#) Enable the comparator using HAL_COMP_Start() function. | |
| (#) Use HAL_COMP_TriggerCallback() or HAL_COMP_GetOutputLevel() functions | |
| to manage comparator outputs (events and output level). | |
| (#) Disable the comparator using HAL_COMP_Stop() function. | |
| (#) De-initialize the comparator using HAL_COMP_DeInit() function. | |
| (#) For safety purpose, comparator configuration can be locked using HAL_COMP_Lock() function. | |
| The only way to unlock the comparator is a device hardware reset. | |
| @endverbatim | |
| ****************************************************************************** | |
| Table 1. COMP inputs and output for STM32L4xx devices | |
| +---------------------------------------------------------+ | |
| | | | COMP1 | COMP2 | | |
| |----------------|----------------|-----------|-----------| | |
| | | IO1 | PC5 | PB4 | | |
| | Input plus | IO2 | PB2 | PB6 | | |
| | | IO3 (3) | PA1 | PA3 | | |
| |----------------|----------------|-----------------------| | |
| | | 1/4 VrefInt | Available | Available | | |
| | | 1/2 VrefInt | Available | Available | | |
| | | 3/4 VrefInt | Available | Available | | |
| | Input minus | VrefInt | Available | Available | | |
| | | DAC1 channel 1 | Available | Available | | |
| | | DAC1 channel 2 | Available | Available | | |
| | | IO1 | PB1 | PB3 | | |
| | | IO2 | PC4 | PB7 | | |
| | | IO3 (3) | PA0 | PA2 | | |
| | | IO4 (3) | PA4 | PA4 | | |
| | | IO5 (3) | PA5 | PA5 | | |
| +---------------------------------------------------------+ | |
| | Output | | PB0 (1) | PB5 (1) | | |
| | | | PB10 (1) | PB11 (1) | | |
| | | | TIM (2) | TIM (2) | | |
| +---------------------------------------------------------+ | |
| (1) GPIO must be set to alternate function for comparator | |
| (2) Comparators output to timers is set in timers instances. | |
| (3) Only STM32L43x/L44x | |
| ****************************************************************************** | |
| * @attention | |
| * | |
| * <h2><center>© COPYRIGHT(c) 2016 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 "stm32l4xx_hal.h" | |
| /** @addtogroup STM32L4xx_HAL_Driver | |
| * @{ | |
| */ | |
| /** @defgroup COMP COMP | |
| * @brief COMP HAL module driver | |
| * @{ | |
| */ | |
| #ifdef HAL_COMP_MODULE_ENABLED | |
| /* Private typedef -----------------------------------------------------------*/ | |
| /* Private define ------------------------------------------------------------*/ | |
| /** @addtogroup COMP_Private_Constants | |
| * @{ | |
| */ | |
| /* Delay for COMP startup time. */ | |
| /* Note: Delay required to reach propagation delay specification. */ | |
| /* Literal set to maximum value (refer to device datasheet, */ | |
| /* parameter "tSTART"). */ | |
| /* Unit: us */ | |
| #define COMP_DELAY_STARTUP_US ((uint32_t) 80U) /*!< Delay for COMP startup time */ | |
| /* Delay for COMP voltage scaler stabilization time. */ | |
| /* Literal set to maximum value (refer to device datasheet, */ | |
| /* parameter "tSTART_SCALER"). */ | |
| /* Unit: us */ | |
| #define COMP_DELAY_VOLTAGE_SCALER_STAB_US ((uint32_t) 200U) /*!< Delay for COMP voltage scaler stabilization time */ | |
| #define COMP_OUTPUT_LEVEL_BITOFFSET_POS ((uint32_t) 30U) | |
| /** | |
| * @} | |
| */ | |
| /* Private macro -------------------------------------------------------------*/ | |
| /* Private variables ---------------------------------------------------------*/ | |
| /* Private function prototypes -----------------------------------------------*/ | |
| /* Exported functions --------------------------------------------------------*/ | |
| /** @defgroup COMP_Exported_Functions COMP Exported Functions | |
| * @{ | |
| */ | |
| /** @defgroup COMP_Exported_Functions_Group1 Initialization/de-initialization functions | |
| * @brief Initialization and de-initialization functions. | |
| * | |
| @verbatim | |
| =============================================================================== | |
| ##### Initialization and de-initialization functions ##### | |
| =============================================================================== | |
| [..] This section provides functions to initialize and de-initialize comparators | |
| @endverbatim | |
| * @{ | |
| */ | |
| /** | |
| * @brief Initialize the COMP according to the specified | |
| * parameters in the COMP_InitTypeDef and initialize the associated handle. | |
| * @note If the selected comparator is locked, initialization can't be performed. | |
| * To unlock the configuration, perform a system reset. | |
| * @param hcomp COMP handle | |
| * @retval HAL status | |
| */ | |
| HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp) | |
| { | |
| uint32_t tmp_csr = 0; | |
| uint32_t exti_line = 0; | |
| uint32_t comp_voltage_scaler_not_initialized = 0; | |
| __IO uint32_t wait_loop_index = 0; | |
| HAL_StatusTypeDef status = HAL_OK; | |
| /* Check the COMP handle allocation and lock status */ | |
| if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) | |
| { | |
| status = HAL_ERROR; | |
| } | |
| else | |
| { | |
| /* Check the parameters */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| assert_param(IS_COMP_INPUT_PLUS(hcomp->Instance, hcomp->Init.NonInvertingInput)); | |
| assert_param(IS_COMP_INPUT_MINUS(hcomp->Instance, hcomp->Init.InvertingInput)); | |
| assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol)); | |
| assert_param(IS_COMP_POWERMODE(hcomp->Init.Mode)); | |
| assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis)); | |
| assert_param(IS_COMP_BLANKINGSRC_INSTANCE(hcomp->Instance, hcomp->Init.BlankingSrce)); | |
| assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); | |
| assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode)); | |
| if(hcomp->State == HAL_COMP_STATE_RESET) | |
| { | |
| /* Allocate lock resource and initialize it */ | |
| hcomp->Lock = HAL_UNLOCKED; | |
| /* Init SYSCFG and the low level hardware to access comparators */ | |
| /* Note: HAL_COMP_Init() calls __HAL_RCC_SYSCFG_CLK_ENABLE() */ | |
| /* to enable internal control clock of the comparators. */ | |
| /* However, this is a legacy strategy. In future STM32 families, */ | |
| /* COMP clock enable must be implemented by user */ | |
| /* in "HAL_COMP_MspInit()". */ | |
| /* Therefore, for compatibility anticipation, it is recommended */ | |
| /* to implement __HAL_RCC_SYSCFG_CLK_ENABLE() */ | |
| /* in "HAL_COMP_MspInit()". */ | |
| __HAL_RCC_SYSCFG_CLK_ENABLE(); | |
| /* Init the low level hardware */ | |
| HAL_COMP_MspInit(hcomp); | |
| } | |
| /* Memorize voltage scaler state before initialization */ | |
| comp_voltage_scaler_not_initialized = (READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN) == 0); | |
| /* Set COMP parameters */ | |
| tmp_csr = (hcomp->Init.InvertingInput | | |
| hcomp->Init.NonInvertingInput | | |
| hcomp->Init.BlankingSrce | | |
| hcomp->Init.Hysteresis | | |
| hcomp->Init.OutputPol | | |
| hcomp->Init.Mode ); | |
| /* Set parameters in COMP register */ | |
| /* Note: Update all bits except read-only, lock and enable bits */ | |
| #if defined (COMP_CSR_INMESEL) | |
| MODIFY_REG(hcomp->Instance->CSR, | |
| COMP_CSR_PWRMODE | COMP_CSR_INMSEL | COMP_CSR_INPSEL | | |
| COMP_CSR_WINMODE | COMP_CSR_POLARITY | COMP_CSR_HYST | | |
| COMP_CSR_BLANKING | COMP_CSR_BRGEN | COMP_CSR_SCALEN | COMP_CSR_INMESEL, | |
| tmp_csr | |
| ); | |
| #else | |
| MODIFY_REG(hcomp->Instance->CSR, | |
| COMP_CSR_PWRMODE | COMP_CSR_INMSEL | COMP_CSR_INPSEL | | |
| COMP_CSR_WINMODE | COMP_CSR_POLARITY | COMP_CSR_HYST | | |
| COMP_CSR_BLANKING | COMP_CSR_BRGEN | COMP_CSR_SCALEN, | |
| tmp_csr | |
| ); | |
| #endif | |
| /* Set window mode */ | |
| /* Note: Window mode bit is located into 1 out of the 2 pairs of COMP */ | |
| /* instances. Therefore, this function can update another COMP */ | |
| /* instance that the one currently selected. */ | |
| if(hcomp->Init.WindowMode == COMP_WINDOWMODE_COMP1_INPUT_PLUS_COMMON) | |
| { | |
| SET_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); | |
| } | |
| else | |
| { | |
| CLEAR_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE); | |
| } | |
| /* Delay for COMP scaler bridge voltage stabilization */ | |
| /* Apply the delay if voltage scaler bridge is enabled for the first time */ | |
| if ((READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN) != 0) && | |
| (comp_voltage_scaler_not_initialized != 0) ) | |
| { | |
| /* Wait loop initialization and execution */ | |
| /* Note: Variable divided by 2 to compensate partially */ | |
| /* CPU processing cycles. */ | |
| wait_loop_index = (COMP_DELAY_VOLTAGE_SCALER_STAB_US * (SystemCoreClock / (1000000 * 2))); | |
| while(wait_loop_index != 0) | |
| { | |
| wait_loop_index--; | |
| } | |
| } | |
| /* Get the EXTI line corresponding to the selected COMP instance */ | |
| exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); | |
| /* Manage EXTI settings */ | |
| if((hcomp->Init.TriggerMode & (COMP_EXTI_IT | COMP_EXTI_EVENT)) != RESET) | |
| { | |
| /* Configure EXTI rising edge */ | |
| if((hcomp->Init.TriggerMode & COMP_EXTI_RISING) != RESET) | |
| { | |
| SET_BIT(EXTI->RTSR1, exti_line); | |
| } | |
| else | |
| { | |
| CLEAR_BIT(EXTI->RTSR1, exti_line); | |
| } | |
| /* Configure EXTI falling edge */ | |
| if((hcomp->Init.TriggerMode & COMP_EXTI_FALLING) != RESET) | |
| { | |
| SET_BIT(EXTI->FTSR1, exti_line); | |
| } | |
| else | |
| { | |
| CLEAR_BIT(EXTI->FTSR1, exti_line); | |
| } | |
| /* Clear COMP EXTI pending bit (if any) */ | |
| WRITE_REG(EXTI->PR1, exti_line); | |
| /* Configure EXTI event mode */ | |
| if((hcomp->Init.TriggerMode & COMP_EXTI_EVENT) != RESET) | |
| { | |
| SET_BIT(EXTI->EMR1, exti_line); | |
| } | |
| else | |
| { | |
| CLEAR_BIT(EXTI->EMR1, exti_line); | |
| } | |
| /* Configure EXTI interrupt mode */ | |
| if((hcomp->Init.TriggerMode & COMP_EXTI_IT) != RESET) | |
| { | |
| SET_BIT(EXTI->IMR1, exti_line); | |
| } | |
| else | |
| { | |
| CLEAR_BIT(EXTI->IMR1, exti_line); | |
| } | |
| } | |
| else | |
| { | |
| /* Disable EXTI event mode */ | |
| CLEAR_BIT(EXTI->EMR1, exti_line); | |
| /* Disable EXTI interrupt mode */ | |
| CLEAR_BIT(EXTI->IMR1, exti_line); | |
| } | |
| /* Set HAL COMP handle state */ | |
| /* Note: Transition from state reset to state ready, */ | |
| /* otherwise (coming from state ready or busy) no state update. */ | |
| if (hcomp->State == HAL_COMP_STATE_RESET) | |
| { | |
| hcomp->State = HAL_COMP_STATE_READY; | |
| } | |
| } | |
| return status; | |
| } | |
| /** | |
| * @brief DeInitialize the COMP peripheral. | |
| * @note Deinitialization cannot be performed if the COMP configuration is locked. | |
| * To unlock the configuration, perform a system reset. | |
| * @param hcomp COMP handle | |
| * @retval HAL status | |
| */ | |
| HAL_StatusTypeDef HAL_COMP_DeInit(COMP_HandleTypeDef *hcomp) | |
| { | |
| HAL_StatusTypeDef status = HAL_OK; | |
| /* Check the COMP handle allocation and lock status */ | |
| if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) | |
| { | |
| status = HAL_ERROR; | |
| } | |
| else | |
| { | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| /* Set COMP_CSR register to reset value */ | |
| WRITE_REG(hcomp->Instance->CSR, 0x00000000); | |
| /* DeInit the low level hardware: SYSCFG, GPIO, CLOCK and NVIC */ | |
| HAL_COMP_MspDeInit(hcomp); | |
| /* Set HAL COMP handle state */ | |
| hcomp->State = HAL_COMP_STATE_RESET; | |
| /* Release Lock */ | |
| __HAL_UNLOCK(hcomp); | |
| } | |
| return status; | |
| } | |
| /** | |
| * @brief Initialize the COMP MSP. | |
| * @param hcomp COMP handle | |
| * @retval None | |
| */ | |
| __weak void HAL_COMP_MspInit(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Prevent unused argument(s) compilation warning */ | |
| UNUSED(hcomp); | |
| /* NOTE : This function should not be modified, when the callback is needed, | |
| the HAL_COMP_MspInit could be implemented in the user file | |
| */ | |
| } | |
| /** | |
| * @brief DeInitialize the COMP MSP. | |
| * @param hcomp COMP handle | |
| * @retval None | |
| */ | |
| __weak void HAL_COMP_MspDeInit(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Prevent unused argument(s) compilation warning */ | |
| UNUSED(hcomp); | |
| /* NOTE : This function should not be modified, when the callback is needed, | |
| the HAL_COMP_MspDeInit could be implemented in the user file | |
| */ | |
| } | |
| /** | |
| * @} | |
| */ | |
| /** @defgroup COMP_Exported_Functions_Group2 Start-Stop operation functions | |
| * @brief Start-Stop operation functions. | |
| * | |
| @verbatim | |
| =============================================================================== | |
| ##### IO operation functions ##### | |
| =============================================================================== | |
| [..] This section provides functions allowing to: | |
| (+) Start a comparator instance. | |
| (+) Stop a comparator instance. | |
| @endverbatim | |
| * @{ | |
| */ | |
| /** | |
| * @brief Start the comparator. | |
| * @param hcomp COMP handle | |
| * @retval HAL status | |
| */ | |
| HAL_StatusTypeDef HAL_COMP_Start(COMP_HandleTypeDef *hcomp) | |
| { | |
| __IO uint32_t wait_loop_index = 0; | |
| HAL_StatusTypeDef status = HAL_OK; | |
| /* Check the COMP handle allocation and lock status */ | |
| if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) | |
| { | |
| status = HAL_ERROR; | |
| } | |
| else | |
| { | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| if(hcomp->State == HAL_COMP_STATE_READY) | |
| { | |
| /* Enable the selected comparator */ | |
| SET_BIT(hcomp->Instance->CSR, COMP_CSR_EN); | |
| /* Set HAL COMP handle state */ | |
| hcomp->State = HAL_COMP_STATE_BUSY; | |
| /* Delay for COMP startup time */ | |
| /* Wait loop initialization and execution */ | |
| /* Note: Variable divided by 2 to compensate partially */ | |
| /* CPU processing cycles. */ | |
| wait_loop_index = (COMP_DELAY_STARTUP_US * (SystemCoreClock / (1000000 * 2))); | |
| while(wait_loop_index != 0) | |
| { | |
| wait_loop_index--; | |
| } | |
| } | |
| else | |
| { | |
| status = HAL_ERROR; | |
| } | |
| } | |
| return status; | |
| } | |
| /** | |
| * @brief Stop the comparator. | |
| * @param hcomp COMP handle | |
| * @retval HAL status | |
| */ | |
| HAL_StatusTypeDef HAL_COMP_Stop(COMP_HandleTypeDef *hcomp) | |
| { | |
| HAL_StatusTypeDef status = HAL_OK; | |
| /* Check the COMP handle allocation and lock status */ | |
| if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) | |
| { | |
| status = HAL_ERROR; | |
| } | |
| else | |
| { | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| if((hcomp->State == HAL_COMP_STATE_BUSY) || | |
| (hcomp->State == HAL_COMP_STATE_READY) ) | |
| { | |
| /* Disable the selected comparator */ | |
| CLEAR_BIT(hcomp->Instance->CSR, COMP_CSR_EN); | |
| /* Set HAL COMP handle state */ | |
| hcomp->State = HAL_COMP_STATE_READY; | |
| } | |
| else | |
| { | |
| status = HAL_ERROR; | |
| } | |
| } | |
| return status; | |
| } | |
| /** | |
| * @brief Comparator IRQ handler. | |
| * @param hcomp COMP handle | |
| * @retval None | |
| */ | |
| void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Get the EXTI line corresponding to the selected COMP instance */ | |
| uint32_t exti_line = COMP_GET_EXTI_LINE(hcomp->Instance); | |
| /* Check COMP EXTI flag */ | |
| if(READ_BIT(EXTI->PR1, exti_line) != RESET) | |
| { | |
| /* Check whether comparator is in independent or window mode */ | |
| if(READ_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE) != RESET) | |
| { | |
| /* Clear COMP EXTI line pending bit of the pair of comparators */ | |
| /* in window mode. */ | |
| /* Note: Pair of comparators in window mode can both trig IRQ when */ | |
| /* input voltage is changing from "out of window" area */ | |
| /* (low or high ) to the other "out of window" area (high or low).*/ | |
| /* Both flags must be cleared to call comparator trigger */ | |
| /* callback is called once. */ | |
| WRITE_REG(EXTI->PR1, (COMP_EXTI_LINE_COMP1 | COMP_EXTI_LINE_COMP2)); | |
| } | |
| else | |
| { | |
| /* Clear COMP EXTI line pending bit */ | |
| WRITE_REG(EXTI->PR1, exti_line); | |
| } | |
| /* COMP trigger user callback */ | |
| HAL_COMP_TriggerCallback(hcomp); | |
| } | |
| } | |
| /** | |
| * @} | |
| */ | |
| /** @defgroup COMP_Exported_Functions_Group3 Peripheral Control functions | |
| * @brief Management functions. | |
| * | |
| @verbatim | |
| =============================================================================== | |
| ##### Peripheral Control functions ##### | |
| =============================================================================== | |
| [..] | |
| This subsection provides a set of functions allowing to control the comparators. | |
| @endverbatim | |
| * @{ | |
| */ | |
| /** | |
| * @brief Lock the selected comparator configuration. | |
| * @note A system reset is required to unlock the comparator configuration. | |
| * @note Locking the comparator from reset state is possible | |
| * if __HAL_RCC_SYSCFG_CLK_ENABLE() is being called before. | |
| * @param hcomp COMP handle | |
| * @retval HAL status | |
| */ | |
| HAL_StatusTypeDef HAL_COMP_Lock(COMP_HandleTypeDef *hcomp) | |
| { | |
| HAL_StatusTypeDef status = HAL_OK; | |
| /* Check the COMP handle allocation and lock status */ | |
| if((hcomp == NULL) || (__HAL_COMP_IS_LOCKED(hcomp))) | |
| { | |
| status = HAL_ERROR; | |
| } | |
| else | |
| { | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| /* Set HAL COMP handle state */ | |
| hcomp->State = ((HAL_COMP_StateTypeDef)(hcomp->State | COMP_STATE_BITFIELD_LOCK)); | |
| } | |
| if(status == HAL_OK) | |
| { | |
| /* Set the lock bit corresponding to selected comparator */ | |
| __HAL_COMP_LOCK(hcomp); | |
| } | |
| return status; | |
| } | |
| /** | |
| * @brief Return the output level (high or low) of the selected comparator. | |
| * The output level depends on the selected polarity. | |
| * If the polarity is not inverted: | |
| * - Comparator output is low when the input plus is at a lower | |
| * voltage than the input minus | |
| * - Comparator output is high when the input plus is at a higher | |
| * voltage than the input minus | |
| * If the polarity is inverted: | |
| * - Comparator output is high when the input plus is at a lower | |
| * voltage than the input minus | |
| * - Comparator output is low when the input plus is at a higher | |
| * voltage than the input minus | |
| * @param hcomp COMP handle | |
| * @retval Returns the selected comparator output level: | |
| * @arg @ref COMP_OUTPUT_LEVEL_LOW | |
| * @arg @ref COMP_OUTPUT_LEVEL_HIGH | |
| * | |
| */ | |
| uint32_t HAL_COMP_GetOutputLevel(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| return (uint32_t)(READ_BIT(hcomp->Instance->CSR, COMP_CSR_VALUE) | |
| >> COMP_OUTPUT_LEVEL_BITOFFSET_POS); | |
| } | |
| /** | |
| * @brief Comparator callback. | |
| * @param hcomp COMP handle | |
| * @retval None | |
| */ | |
| __weak void HAL_COMP_TriggerCallback(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Prevent unused argument(s) compilation warning */ | |
| UNUSED(hcomp); | |
| /* NOTE : This function should not be modified, when the callback is needed, | |
| the HAL_COMP_TriggerCallback should be implemented in the user file | |
| */ | |
| } | |
| /** | |
| * @} | |
| */ | |
| /** @defgroup COMP_Exported_Functions_Group4 Peripheral State functions | |
| * @brief Peripheral State functions. | |
| * | |
| @verbatim | |
| =============================================================================== | |
| ##### Peripheral State functions ##### | |
| =============================================================================== | |
| [..] | |
| This subsection permit to get in run-time the status of the peripheral. | |
| @endverbatim | |
| * @{ | |
| */ | |
| /** | |
| * @brief Return the COMP handle state. | |
| * @param hcomp COMP handle | |
| * @retval HAL state | |
| */ | |
| HAL_COMP_StateTypeDef HAL_COMP_GetState(COMP_HandleTypeDef *hcomp) | |
| { | |
| /* Check the COMP handle allocation */ | |
| if(hcomp == NULL) | |
| { | |
| return HAL_COMP_STATE_RESET; | |
| } | |
| /* Check the parameter */ | |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); | |
| /* Return HAL COMP handle state */ | |
| return hcomp->State; | |
| } | |
| /** | |
| * @} | |
| */ | |
| /** | |
| * @} | |
| */ | |
| #endif /* HAL_COMP_MODULE_ENABLED */ | |
| /** | |
| * @} | |
| */ | |
| /** | |
| * @} | |
| */ | |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |