| /** |
| ****************************************************************************** |
| * @file stm32l0xx_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 |
| * + 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 STM32L0xx 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 STM32L0xx 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 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 @ref HAL_COMP_RegisterCallback() |
| to register an interrupt callback. |
| [..] |
| |
| Function @ref 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 @ref HAL_COMP_UnRegisterCallback to reset a callback to the default |
| weak function. |
| [..] |
| |
| @ref 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 @ref HAL_COMP_Init() and when the state is @ref HAL_COMP_STATE_RESET |
| all callbacks are set to the corresponding weak functions: |
| example @ref HAL_COMP_TriggerCallback(). |
| Exception done for MspInit and MspDeInit functions that are |
| reset to the legacy weak functions in the @ref HAL_COMP_Init()/ @ref HAL_COMP_DeInit() only when |
| these callbacks are null (not registered beforehand). |
| [..] |
| |
| If MspInit or MspDeInit are not null, the @ref HAL_COMP_Init()/ @ref HAL_COMP_DeInit() |
| keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state. |
| [..] |
| |
| Callbacks can be registered/unregistered in @ref HAL_COMP_STATE_READY state only. |
| Exception done MspInit/MspDeInit functions that can be registered/unregistered |
| in @ref HAL_COMP_STATE_READY or @ref 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 @ref HAL_COMP_RegisterCallback() before calling @ref HAL_COMP_DeInit() |
| or @ref 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 STM32L0xx devices |
| +---------------------------------------------------------+ |
| | | | COMP1 | COMP2 | |
| |----------------|----------------|-----------|-----------| |
| | | IO1 | PA1 | PA3 | |
| | Input plus | IO2 | --- | PA4 | |
| | | IO3 | --- | PB5 | |
| | | IO4 | --- | PB6 | |
| | | IO5 | --- | PB7 | |
| |----------------|----------------|-----------------------| |
| | | 1/4 VrefInt | --- | Available | |
| | | 1/2 VrefInt | --- | Available | |
| | | 3/4 VrefInt | --- | Available | |
| | Input minus | VrefInt | Available | Available | |
| | | DAC1 channel 1 | Available | Available | |
| | | DAC1 channel 2 | Available | Available | |
| | | IO1 | PA0 | PA2 | |
| | | IO2 | PA5 | PA5 | |
| | | IO3 | --- | PB3 | |
| +---------------------------------------------------------+ |
| | Output | | PA0 (1) | PA2 (1) | |
| | | | PA6 (1) | PA7 (1) | |
| | | | PA11 (1) | PA12 (1) | |
| | | | LPTIM | LPTIM | |
| | | | TIM (2) | TIM (2) | |
| +-----------------------------------------------------------+ |
| (1) GPIO must be set to alternate function for comparator |
| (2) Comparators output to timers is set in timers instances. |
| |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© Copyright(c) 2016 STMicroelectronics. |
| * All rights reserved.</center></h2> |
| * |
| * This software component is licensed by ST under BSD 3-Clause license, |
| * the "License"; You may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at: |
| * opensource.org/licenses/BSD-3-Clause |
| * |
| ****************************************************************************** |
| */ |
| |
| #if !defined (STM32L010xB) && !defined (STM32L010x8) && !defined (STM32L010x6) && !defined (STM32L010x4) |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32l0xx_hal.h" |
| |
| /** @addtogroup STM32L0xx_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) 25U) /*!< Delay for COMP startup time */ |
| |
| /* Delay for COMP voltage scaler stabilization time (voltage from VrefInt, */ |
| /* delay based on VrefInt startup time). */ |
| /* Literal set to maximum value (refer to device datasheet, */ |
| /* parameter "TVREFINT"). */ |
| /* Unit: us */ |
| #define COMP_DELAY_VOLTAGE_SCALER_STAB_US ((uint32_t)3000U) /*!< Delay for COMP voltage scaler stabilization time */ |
| |
| #define COMP_OUTPUT_LEVEL_BITOFFSET_POS ((uint32_t) 30U) |
| |
| #define C_REV_ID_A 0x1000U /* Cut1.0 */ |
| #define C_REV_ID_Z 0x1008U /* Cut1.1 */ |
| #define C_REV_ID_Y 0x1003U /* Cut1.2 */ |
| |
| #define C_DEV_ID_L073 0x447U |
| #define C_DEV_ID_L053 0x417U |
| |
| /** |
| * @} |
| */ |
| |
| /* 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. |
| * @note When the LPTIM connection is enabled, the following pins LPTIM_IN1(PB5, PC0) |
| and LPTIM_IN2(PB7, PC2) should not be configured in alternate function. |
| * @param hcomp COMP handle |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_Init(COMP_HandleTypeDef *hcomp) |
| { |
| uint32_t tmp_csr = 0U; |
| uint32_t exti_line = 0U; |
| uint32_t comp_voltage_scaler_not_initialized = 0U; |
| __IO uint32_t wait_loop_index = 0U; |
| 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_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(); |
| |
| #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 */ |
| } |
| |
| /* Set COMP parameters */ |
| tmp_csr = (hcomp->Init.InvertingInput | |
| hcomp->Init.OutputPol ); |
| |
| /* Configuration specific to comparator instance: COMP2 */ |
| if ((hcomp->Instance) == COMP2) |
| { |
| /* Comparator input plus configuration is available on COMP2 only */ |
| /* Comparator power mode configuration is available on COMP2 only */ |
| tmp_csr |= (hcomp->Init.NonInvertingInput | |
| hcomp->Init.Mode ); |
| |
| /* COMP2 specificity: when using VrefInt or subdivision of VrefInt, */ |
| /* specific path must be enabled. */ |
| if((hcomp->Init.InvertingInput == COMP_INPUT_MINUS_VREFINT) || |
| (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_1_4VREFINT) || |
| (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_1_2VREFINT) || |
| (hcomp->Init.InvertingInput == COMP_INPUT_MINUS_3_4VREFINT) ) |
| { |
| /* Memorize voltage scaler state before initialization */ |
| comp_voltage_scaler_not_initialized = (READ_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP) == 0U); |
| |
| SET_BIT(SYSCFG->CFGR3, SYSCFG_CFGR3_EN_VREFINT | |
| SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP ); |
| |
| /* Delay for COMP scaler bridge voltage stabilization */ |
| /* Apply the delay if voltage scaler bridge is enabled for the first time */ |
| if (comp_voltage_scaler_not_initialized != 0U) |
| { |
| /* 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 / (1000000U * 2U))); |
| while(wait_loop_index != 0U) |
| { |
| wait_loop_index--; |
| } |
| } |
| } |
| } |
| |
| /* Set comparator output connection to LPTIM */ |
| if (hcomp->Init.LPTIMConnection != COMP_LPTIMCONNECTION_DISABLED) |
| { |
| /* LPTIM connexion requested on COMP1 */ |
| if ((hcomp->Instance) == COMP1) |
| { |
| /* Note : COMP1 can be connected to the input 1 of LPTIM if requested */ |
| assert_param(IS_COMP1_LPTIMCONNECTION(hcomp->Init.LPTIMConnection)); |
| |
| /* Note: Compatibility with previous driver version using */ |
| /* generic literal COMP_LPTIMCONNECTION_ENABLED corresponding */ |
| /* to LPTIM input 1 for COMP1. */ |
| tmp_csr |= (COMP_CSR_COMP1LPTIM1IN1); |
| } |
| else |
| { |
| /* Note : COMP2 can be connected to input 1 or input 2 of LPTIM if requested */ |
| assert_param(IS_COMP2_LPTIMCONNECTION(hcomp->Init.LPTIMConnection)); |
| |
| switch (hcomp->Init.LPTIMConnection) |
| { |
| case COMP_LPTIMCONNECTION_IN1_ENABLED : |
| tmp_csr |= (COMP_CSR_COMP2LPTIM1IN1); |
| break; |
| case COMP_LPTIMCONNECTION_IN2_ENABLED : |
| default : |
| /* Note: Default case for compatibility with previous driver version*/ |
| /* using generic literal COMP_LPTIMCONNECTION_ENABLED corresponding */ |
| /* to LPTIM input 2 for COMP2. */ |
| |
| /* Check the MCU_ID in order to allow or not the COMP2 connection to LPTIM input 2 */ |
| if (((HAL_GetDEVID() == C_DEV_ID_L073) && (HAL_GetREVID() == C_REV_ID_A)) |
| || |
| ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_A)) |
| || |
| ((HAL_GetDEVID() == C_DEV_ID_L053) && (HAL_GetREVID() == C_REV_ID_Z))) |
| { |
| assert_param(IS_COMP2_LPTIMCONNECTION_RESTRICTED(hcomp->Init.LPTIMConnection)); |
| |
| /* Error: On the selected device, COMP2 cannot be connected to LPTIM input 2 */ |
| status = HAL_ERROR; |
| } |
| else |
| { |
| tmp_csr |= (COMP_CSR_COMP2LPTIM1IN2); |
| } |
| break; |
| } |
| } |
| } |
| |
| /* Update comparator register */ |
| if ((hcomp->Instance) == COMP1) |
| { |
| MODIFY_REG(hcomp->Instance->CSR, |
| COMP_CSR_COMP1INNSEL | COMP_CSR_COMP1WM | |
| COMP_CSR_COMP1LPTIM1IN1 | COMP_CSR_COMP1POLARITY , |
| tmp_csr |
| ); |
| } |
| else /* Instance == COMP2 */ |
| { |
| MODIFY_REG(hcomp->Instance->CSR, |
| COMP_CSR_COMP2SPEED | COMP_CSR_COMP2INNSEL | |
| COMP_CSR_COMP2INPSEL | COMP_CSR_COMP2POLARITY | |
| COMP_CSR_COMP2LPTIM1IN2 | COMP_CSR_COMP2LPTIM1IN1 , |
| tmp_csr |
| ); |
| } |
| |
| /* 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); |
| } |
| |
| /* 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->RTSR, exti_line); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->RTSR, exti_line); |
| } |
| |
| /* Configure EXTI falling edge */ |
| if((hcomp->Init.TriggerMode & COMP_EXTI_FALLING) != RESET) |
| { |
| SET_BIT(EXTI->FTSR, exti_line); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->FTSR, exti_line); |
| } |
| |
| /* Clear COMP EXTI pending bit (if any) */ |
| WRITE_REG(EXTI->PR, exti_line); |
| |
| /* Configure EXTI event mode */ |
| if((hcomp->Init.TriggerMode & COMP_EXTI_EVENT) != RESET) |
| { |
| SET_BIT(EXTI->EMR, exti_line); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->EMR, exti_line); |
| } |
| |
| /* Configure EXTI interrupt mode */ |
| if((hcomp->Init.TriggerMode & COMP_EXTI_IT) != RESET) |
| { |
| SET_BIT(EXTI->IMR, exti_line); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->IMR, exti_line); |
| } |
| } |
| else |
| { |
| /* Disable EXTI event mode */ |
| CLEAR_BIT(EXTI->EMR, exti_line); |
| |
| /* Disable EXTI interrupt mode */ |
| CLEAR_BIT(EXTI->IMR, 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, 0x00000000U); |
| |
| #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, CLOCK, NVIC */ |
| hcomp->MspDeInitCallback(hcomp); |
| #else |
| /* DeInit the low level hardware: GPIO, 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 = 0U; |
| 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_COMPxEN); |
| |
| /* 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 / (1000000U * 2U))); |
| while(wait_loop_index != 0U) |
| { |
| 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_COMPxEN); |
| |
| /* 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->PR, exti_line) != RESET) |
| { |
| /* Check whether comparator is in independent or window mode */ |
| if(READ_BIT(COMP12_COMMON->CSR, COMP_CSR_WINMODE) != 0) |
| { |
| /* 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->PR, (COMP_EXTI_LINE_COMP1 | COMP_EXTI_LINE_COMP2)); |
| } |
| else |
| { |
| /* Clear COMP EXTI line pending bit */ |
| WRITE_REG(EXTI->PR, exti_line); |
| } |
| |
| /* COMP trigger 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) || (__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_COMPxOUTVALUE) |
| >> 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(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(COMP_HandleTypeDef *hcomp) |
| { |
| /* Check the parameters */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| return hcomp->ErrorCode; |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* HAL_COMP_MODULE_ENABLED */ |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* !defined (STM32L010xB) && !defined (STM32L010x8) && !defined (STM32L010x6) && !defined (STM32L010x4) */ |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
