| /** |
| ****************************************************************************** |
| * @file stm32l4xx_hal_comp.c |
| * @author MCD Application Team |
| * @brief COMP HAL module driver. |
| * This file provides firmware functions to manage the following |
| * functionalities of the COMP peripheral: |
| * + Initialization and de-initialization functions |
| * + Peripheral control functions |
| * + Peripheral state functions |
| * |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2017 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. |
| * |
| ****************************************************************************** |
| @verbatim |
| ============================================================================== |
| ##### COMP Peripheral features ##### |
| ============================================================================== |
| |
| [..] |
| The STM32L4xx device family integrates two analog comparators instances: |
| COMP1, COMP2 except for the STM32L412xx/STM32L422xx products featuring only |
| one instance: COMP1 (in this case, all comments related to pair of comparators are not applicable) |
| (#) Comparators 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). |
| |
| (#) Comparators 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). |
| |
| (#) The comparators have interrupt capability through the EXTI controller |
| with wake-up from sleep and stop modes. |
| |
| (#) Pairs of comparators instances can be combined in window mode |
| (2 consecutive instances odd and even COMP<x> and COMP<x+1>). |
| |
| From the corresponding IRQ handler, the right interrupt source can be retrieved |
| using macro __HAL_COMP_COMPx_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. |
| |
| *** Callback registration *** |
| ============================================= |
| [..] |
| |
| The compilation flag USE_HAL_COMP_REGISTER_CALLBACKS, when set to 1, |
| allows the user to configure dynamically the driver callbacks. |
| Use Functions HAL_COMP_RegisterCallback() |
| to register an interrupt callback. |
| [..] |
| |
| Function HAL_COMP_RegisterCallback() allows to register following callbacks: |
| (+) TriggerCallback : callback for COMP trigger. |
| (+) MspInitCallback : callback for Msp Init. |
| (+) MspDeInitCallback : callback for Msp DeInit. |
| This function takes as parameters the HAL peripheral handle, the Callback ID |
| and a pointer to the user callback function. |
| [..] |
| |
| Use function HAL_COMP_UnRegisterCallback to reset a callback to the default |
| weak function. |
| [..] |
| |
| HAL_COMP_UnRegisterCallback takes as parameters the HAL peripheral handle, |
| and the Callback ID. |
| This function allows to reset following callbacks: |
| (+) TriggerCallback : callback for COMP trigger. |
| (+) MspInitCallback : callback for Msp Init. |
| (+) MspDeInitCallback : callback for Msp DeInit. |
| [..] |
| |
| By default, after the HAL_COMP_Init() and when the state is HAL_COMP_STATE_RESET |
| all callbacks are set to the corresponding weak functions: |
| example HAL_COMP_TriggerCallback(). |
| Exception done for MspInit and MspDeInit functions that are |
| reset to the legacy weak functions in the HAL_COMP_Init()/ HAL_COMP_DeInit() only when |
| these callbacks are null (not registered beforehand). |
| [..] |
| |
| If MspInit or MspDeInit are not null, the HAL_COMP_Init()/ HAL_COMP_DeInit() |
| keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state. |
| [..] |
| |
| Callbacks can be registered/unregistered in HAL_COMP_STATE_READY state only. |
| Exception done MspInit/MspDeInit functions that can be registered/unregistered |
| in HAL_COMP_STATE_READY or HAL_COMP_STATE_RESET state, |
| thus registered (user) MspInit/DeInit callbacks can be used during the Init/DeInit. |
| [..] |
| |
| Then, the user first registers the MspInit/MspDeInit user callbacks |
| using HAL_COMP_RegisterCallback() before calling HAL_COMP_DeInit() |
| or HAL_COMP_Init() function. |
| [..] |
| |
| When the compilation flag USE_HAL_COMP_REGISTER_CALLBACKS is set to 0 or |
| not defined, the callback registration feature is not available and all callbacks |
| are set to the corresponding weak functions. |
| |
| @endverbatim |
| ****************************************************************************** |
| Table 1. COMP inputs and output for STM32L4xx devices |
| +-----------------------------------------------------------------+ |
| | | | COMP1 | COMP2 (4) | |
| |----------------|----------------|---------------|---------------+ |
| | | 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 (4) | |
| | | DAC1 channel 2 | Available | Available (4) | |
| | | 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 |
| (4) Not applicable to STM32L412x/L422x |
| |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l4xx_hal.h" |
| |
| /** @addtogroup STM32L4xx_HAL_Driver |
| * @{ |
| */ |
| |
| #ifdef HAL_COMP_MODULE_ENABLED |
| |
| #if defined (COMP1) || defined (COMP2) |
| |
| /** @defgroup COMP COMP |
| * @brief COMP HAL module driver |
| * @{ |
| */ |
| |
| /* 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 (80UL) /*!< 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 (200UL) /*!< Delay for COMP voltage scaler stabilization time */ |
| |
| #define COMP_OUTPUT_LEVEL_BITOFFSET_POS (30UL) |
| |
| /** |
| * @} |
| */ |
| |
| /* 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; |
| uint32_t exti_line; |
| uint32_t comp_voltage_scaler_initialized; /* Value "0" if comparator voltage scaler is not initialized */ |
| __IO uint32_t wait_loop_index = 0UL; |
| HAL_StatusTypeDef status = HAL_OK; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if (hcomp == NULL) |
| { |
| status = HAL_ERROR; |
| } |
| else if (__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)); |
| |
| #if defined(COMP2) |
| assert_param(IS_COMP_WINDOWMODE(hcomp->Init.WindowMode)); |
| #endif /* COMP2 */ |
| |
| |
| if (hcomp->State == HAL_COMP_STATE_RESET) |
| { |
| /* Allocate lock resource and initialize it */ |
| hcomp->Lock = HAL_UNLOCKED; |
| |
| /* Set COMP error code to none */ |
| COMP_CLEAR_ERRORCODE(hcomp); |
| |
| /* 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(); |
| |
| #if (USE_HAL_COMP_REGISTER_CALLBACKS == 1) |
| /* Init the COMP Callback settings */ |
| hcomp->TriggerCallback = HAL_COMP_TriggerCallback; /* Legacy weak callback */ |
| |
| if (hcomp->MspInitCallback == NULL) |
| { |
| hcomp->MspInitCallback = HAL_COMP_MspInit; /* Legacy weak MspInit */ |
| } |
| |
| /* Init the low level hardware */ |
| hcomp->MspInitCallback(hcomp); |
| #else |
| /* Init the low level hardware */ |
| HAL_COMP_MspInit(hcomp); |
| #endif /* USE_HAL_COMP_REGISTER_CALLBACKS */ |
| } |
| |
| /* Memorize voltage scaler state before initialization */ |
| comp_voltage_scaler_initialized = READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN); |
| |
| /* Set COMP parameters */ |
| tmp_csr = (hcomp->Init.NonInvertingInput |
| | hcomp->Init.InvertingInput |
| | 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) |
| #if defined (COMP_CSR_WINMODE) |
| 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_POLARITY | COMP_CSR_HYST | |
| COMP_CSR_BLANKING | COMP_CSR_BRGEN | COMP_CSR_SCALEN | COMP_CSR_INMESEL, |
| tmp_csr |
| ); |
| #endif /* COMP_CSR_WINMODE */ |
| #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 /* COMP_CSR_INMESEL */ |
| |
| |
| #if defined(COMP2) |
| /* 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); |
| } |
| #endif /* COMP2 */ |
| |
| |
| /* Delay for COMP scaler bridge voltage stabilization */ |
| /* Apply the delay if voltage scaler bridge is required and not already enabled */ |
| if ((READ_BIT(hcomp->Instance->CSR, COMP_CSR_SCALEN) != 0UL) && |
| (comp_voltage_scaler_initialized == 0UL)) |
| { |
| /* Wait loop initialization and execution */ |
| /* Note: Variable divided by 2 to compensate partially */ |
| /* CPU processing cycles, scaling in us split to not */ |
| /* exceed 32 bits register capacity and handle low frequency. */ |
| wait_loop_index = ((COMP_DELAY_VOLTAGE_SCALER_STAB_US / 10UL) * ((SystemCoreClock / (100000UL * 2UL)) + 1UL)); |
| while (wait_loop_index != 0UL) |
| { |
| 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)) != 0UL) |
| { |
| /* Configure EXTI rising edge */ |
| if ((hcomp->Init.TriggerMode & COMP_EXTI_RISING) != 0UL) |
| { |
| LL_EXTI_EnableRisingTrig_0_31(exti_line); |
| } |
| else |
| { |
| LL_EXTI_DisableRisingTrig_0_31(exti_line); |
| } |
| |
| /* Configure EXTI falling edge */ |
| if ((hcomp->Init.TriggerMode & COMP_EXTI_FALLING) != 0UL) |
| { |
| LL_EXTI_EnableFallingTrig_0_31(exti_line); |
| } |
| else |
| { |
| LL_EXTI_DisableFallingTrig_0_31(exti_line); |
| } |
| |
| /* Clear COMP EXTI pending bit (if any) */ |
| LL_EXTI_ClearFlag_0_31(exti_line); |
| |
| /* Configure EXTI event mode */ |
| if ((hcomp->Init.TriggerMode & COMP_EXTI_EVENT) != 0UL) |
| { |
| LL_EXTI_EnableEvent_0_31(exti_line); |
| } |
| else |
| { |
| LL_EXTI_DisableEvent_0_31(exti_line); |
| } |
| |
| /* Configure EXTI interrupt mode */ |
| if ((hcomp->Init.TriggerMode & COMP_EXTI_IT) != 0UL) |
| { |
| LL_EXTI_EnableIT_0_31(exti_line); |
| } |
| else |
| { |
| LL_EXTI_DisableIT_0_31(exti_line); |
| } |
| } |
| else |
| { |
| /* Disable EXTI event mode */ |
| LL_EXTI_DisableEvent_0_31(exti_line); |
| |
| /* Disable EXTI interrupt mode */ |
| LL_EXTI_DisableIT_0_31(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) |
| { |
| status = HAL_ERROR; |
| } |
| else if (__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, 0x00000000UL); |
| |
| #if (USE_HAL_COMP_REGISTER_CALLBACKS == 1) |
| if (hcomp->MspDeInitCallback == NULL) |
| { |
| hcomp->MspDeInitCallback = HAL_COMP_MspDeInit; /* Legacy weak MspDeInit */ |
| } |
| |
| /* DeInit the low level hardware: GPIO, RCC clock, NVIC */ |
| hcomp->MspDeInitCallback(hcomp); |
| #else |
| /* DeInit the low level hardware: GPIO, RCC clock, NVIC */ |
| HAL_COMP_MspDeInit(hcomp); |
| #endif /* USE_HAL_COMP_REGISTER_CALLBACKS */ |
| |
| /* 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 |
| */ |
| } |
| |
| #if (USE_HAL_COMP_REGISTER_CALLBACKS == 1) |
| /** |
| * @brief Register a User COMP Callback |
| * To be used instead of the weak predefined callback |
| * @param hcomp Pointer to a COMP_HandleTypeDef structure that contains |
| * the configuration information for the specified COMP. |
| * @param CallbackID ID of the callback to be registered |
| * This parameter can be one of the following values: |
| * @arg @ref HAL_COMP_TRIGGER_CB_ID Trigger callback ID |
| * @arg @ref HAL_COMP_MSPINIT_CB_ID MspInit callback ID |
| * @arg @ref HAL_COMP_MSPDEINIT_CB_ID MspDeInit callback ID |
| * @param pCallback pointer to the Callback function |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_RegisterCallback(COMP_HandleTypeDef *hcomp, HAL_COMP_CallbackIDTypeDef CallbackID, |
| pCOMP_CallbackTypeDef pCallback) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| |
| if (pCallback == NULL) |
| { |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| return HAL_ERROR; |
| } |
| |
| if (HAL_COMP_STATE_READY == hcomp->State) |
| { |
| switch (CallbackID) |
| { |
| case HAL_COMP_TRIGGER_CB_ID : |
| hcomp->TriggerCallback = pCallback; |
| break; |
| |
| case HAL_COMP_MSPINIT_CB_ID : |
| hcomp->MspInitCallback = pCallback; |
| break; |
| |
| case HAL_COMP_MSPDEINIT_CB_ID : |
| hcomp->MspDeInitCallback = pCallback; |
| break; |
| |
| default : |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| break; |
| } |
| } |
| else if (HAL_COMP_STATE_RESET == hcomp->State) |
| { |
| switch (CallbackID) |
| { |
| case HAL_COMP_MSPINIT_CB_ID : |
| hcomp->MspInitCallback = pCallback; |
| break; |
| |
| case HAL_COMP_MSPDEINIT_CB_ID : |
| hcomp->MspDeInitCallback = pCallback; |
| break; |
| |
| default : |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| break; |
| } |
| } |
| else |
| { |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Unregister a COMP Callback |
| * COMP callback is redirected to the weak predefined callback |
| * @param hcomp Pointer to a COMP_HandleTypeDef structure that contains |
| * the configuration information for the specified COMP. |
| * @param CallbackID ID of the callback to be unregistered |
| * This parameter can be one of the following values: |
| * @arg @ref HAL_COMP_TRIGGER_CB_ID Trigger callback ID |
| * @arg @ref HAL_COMP_MSPINIT_CB_ID MspInit callback ID |
| * @arg @ref HAL_COMP_MSPDEINIT_CB_ID MspDeInit callback ID |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_UnRegisterCallback(COMP_HandleTypeDef *hcomp, HAL_COMP_CallbackIDTypeDef CallbackID) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| |
| if (HAL_COMP_STATE_READY == hcomp->State) |
| { |
| switch (CallbackID) |
| { |
| case HAL_COMP_TRIGGER_CB_ID : |
| hcomp->TriggerCallback = HAL_COMP_TriggerCallback; /* Legacy weak callback */ |
| break; |
| |
| case HAL_COMP_MSPINIT_CB_ID : |
| hcomp->MspInitCallback = HAL_COMP_MspInit; /* Legacy weak MspInit */ |
| break; |
| |
| case HAL_COMP_MSPDEINIT_CB_ID : |
| hcomp->MspDeInitCallback = HAL_COMP_MspDeInit; /* Legacy weak MspDeInit */ |
| break; |
| |
| default : |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| break; |
| } |
| } |
| else if (HAL_COMP_STATE_RESET == hcomp->State) |
| { |
| switch (CallbackID) |
| { |
| case HAL_COMP_MSPINIT_CB_ID : |
| hcomp->MspInitCallback = HAL_COMP_MspInit; /* Legacy weak MspInit */ |
| break; |
| |
| case HAL_COMP_MSPDEINIT_CB_ID : |
| hcomp->MspDeInitCallback = HAL_COMP_MspDeInit; /* Legacy weak MspDeInit */ |
| break; |
| |
| default : |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| break; |
| } |
| } |
| else |
| { |
| /* Update the error code */ |
| hcomp->ErrorCode |= HAL_COMP_ERROR_INVALID_CALLBACK; |
| |
| /* Return error status */ |
| status = HAL_ERROR; |
| } |
| |
| return status; |
| } |
| |
| #endif /* USE_HAL_COMP_REGISTER_CALLBACKS */ |
| |
| /** |
| * @} |
| */ |
| |
| /** @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 = 0UL; |
| HAL_StatusTypeDef status = HAL_OK; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if (hcomp == NULL) |
| { |
| status = HAL_ERROR; |
| } |
| else if (__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, scaling in us split to not */ |
| /* exceed 32 bits register capacity and handle low frequency. */ |
| wait_loop_index = ((COMP_DELAY_STARTUP_US / 10UL) * ((SystemCoreClock / (100000UL * 2UL)) + 1UL)); |
| while (wait_loop_index != 0UL) |
| { |
| 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) |
| { |
| status = HAL_ERROR; |
| } |
| else if (__HAL_COMP_IS_LOCKED(hcomp)) |
| { |
| status = HAL_ERROR; |
| } |
| else |
| { |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| /* Check compliant states: HAL_COMP_STATE_READY or HAL_COMP_STATE_BUSY */ |
| /* (all states except HAL_COMP_STATE_RESET and except locked status. */ |
| if (hcomp->State != HAL_COMP_STATE_RESET) |
| { |
| /* 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 (LL_EXTI_IsActiveFlag_0_31(exti_line) != 0UL) |
| { |
| #if defined(COMP2) |
| /* Check whether comparator is in independent or window mode */ |
| if (READ_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE) != 0UL) |
| { |
| /* 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. */ |
| LL_EXTI_ClearFlag_0_31((COMP_EXTI_LINE_COMP1 | COMP_EXTI_LINE_COMP2)); |
| } |
| else |
| #endif /* COMP2 */ |
| { |
| /* Clear COMP EXTI line pending bit */ |
| LL_EXTI_ClearFlag_0_31(exti_line); |
| } |
| |
| /* COMP trigger user callback */ |
| #if (USE_HAL_COMP_REGISTER_CALLBACKS == 1) |
| hcomp->TriggerCallback(hcomp); |
| #else |
| HAL_COMP_TriggerCallback(hcomp); |
| #endif /* USE_HAL_COMP_REGISTER_CALLBACKS */ |
| } |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** @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) |
| { |
| status = HAL_ERROR; |
| } |
| else if (__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 */ |
| switch (hcomp->State) |
| { |
| case HAL_COMP_STATE_RESET: |
| hcomp->State = HAL_COMP_STATE_RESET_LOCKED; |
| break; |
| case HAL_COMP_STATE_READY: |
| hcomp->State = HAL_COMP_STATE_READY_LOCKED; |
| break; |
| default: /* HAL_COMP_STATE_BUSY */ |
| hcomp->State = HAL_COMP_STATE_BUSY_LOCKED; |
| break; |
| } |
| |
| /* 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 COMP_OUTPUT_LEVEL_LOW |
| * @arg COMP_OUTPUT_LEVEL_HIGH |
| * |
| */ |
| uint32_t HAL_COMP_GetOutputLevel(const 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 trigger 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(const 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; |
| } |
| |
| /** |
| * @brief Return the COMP error code. |
| * @param hcomp COMP handle |
| * @retval COMP error code |
| */ |
| uint32_t HAL_COMP_GetError(const COMP_HandleTypeDef *hcomp) |
| { |
| /* Check the parameters */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| return hcomp->ErrorCode; |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* COMP1 || COMP2 */ |
| |
| #endif /* HAL_COMP_MODULE_ENABLED */ |
| |
| /** |
| * @} |
| */ |
