| /** |
| ****************************************************************************** |
| * @file stm32f0xx_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/de-initialization functions |
| * + I/O operation functions |
| * + Peripheral Control functions |
| * + Peripheral State functions |
| * |
| @verbatim |
| ================================================================================ |
| ##### COMP Peripheral features ##### |
| ================================================================================ |
| |
| [..] |
| The STM32F0xx device family integrates up to 2 analog comparators COMP1 and COMP2: |
| (+) The non inverting input and inverting input can be set to GPIO pins. |
| |
| (+) The COMP output is available using HAL_COMP_GetOutputLevel() |
| and can be set on GPIO pins. |
| |
| (+) The COMP output can be redirected to embedded timers (TIM1, TIM2 and TIM3). |
| |
| (+) The comparators COMP1 and COMP2 can be combined in window mode. |
| |
| (+) The comparators have interrupt capability with wake-up |
| from Sleep and Stop modes (through the EXTI controller): |
| (++) 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 with the |
| macros __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 Comparators of STM32F05x, STM32F07x and STM32F09x devices. |
| |
| To use the comparator, perform the following steps: |
| |
| (#) Fill in the HAL_COMP_MspInit() to |
| (++) Configure the comparator input in analog mode using HAL_GPIO_Init() |
| (++) Configure the comparator output in alternate function mode using HAL_GPIO_Init() to map the comparator |
| output to the GPIO pin |
| (++) 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 inverting input (input minus) |
| (++) Select the non inverting input (input plus) |
| (++) Select the output polarity |
| (++) Select the output redirection |
| (++) Select the hysteresis level |
| (++) Select the power mode |
| (++) Select the event/interrupt mode |
| (++) Select the window mode |
| |
| -@@- HAL_COMP_Init() calls internally __HAL_RCC_SYSCFG_CLK_ENABLE() in order |
| to access the comparator(s) registers. |
| |
| (#) Enable the comparator using HAL_COMP_Start() function or HAL_COMP_Start_IT() function for interrupt mode. |
| |
| (#) Use HAL_COMP_TriggerCallback() and/or HAL_COMP_GetOutputLevel() functions |
| to manage comparator outputs (event/interrupt triggered and output level). |
| |
| (#) Disable the comparator using HAL_COMP_Stop() or HAL_COMP_Stop_IT() |
| function. |
| |
| (#) De-initialize the comparator using HAL_COMP_DeInit() function. |
| |
| (#) For safety purposes comparator(s) can be locked using HAL_COMP_Lock() function. |
| Only a MCU reset can reset that protection. |
| |
| @endverbatim |
| ****************************************************************************** |
| * @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. |
| * |
| ****************************************************************************** |
| */ |
| |
| /* |
| Additional Tables: |
| |
| Table 1. COMP Inputs for the STM32F05x, STM32F07x and STM32F09x devices |
| +--------------------------------------------------+ |
| | | | COMP1 | COMP2 | |
| |-----------------|----------------|---------------| |
| | | 1/4 VREFINT | OK | OK | |
| | | 1/2 VREFINT | OK | OK | |
| | | 3/4 VREFINT | OK | OK | |
| | Inverting Input | VREFINT | OK | OK | |
| | | DAC1 OUT (PA4) | OK | OK | |
| | | DAC2 OUT (PA5) | OK | OK | |
| | | IO1 | PA0 | PA2 | |
| |-----------------|----------------|-------|-------| |
| | Non Inverting | | PA1 | PA3 | |
| | Input | | | | |
| +--------------------------------------------------+ |
| |
| Table 2. COMP Outputs for the STM32F05x, STM32F07x and STM32F09x devices |
| +---------------+ |
| | COMP1 | COMP2 | |
| |-------|-------| |
| | PA0 | PA2 | |
| | PA6 | PA7 | |
| | PA11 | PA12 | |
| +---------------+ |
| |
| Table 3. COMP Outputs redirection to embedded timers for the STM32F05x, STM32F07x and STM32F09x devices |
| +---------------------------------+ |
| | COMP1 | COMP2 | |
| |----------------|----------------| |
| | TIM1 BKIN | TIM1 BKIN | |
| | | | |
| | TIM1 OCREFCLR | TIM1 OCREFCLR | |
| | | | |
| | TIM1 IC1 | TIM1 IC1 | |
| | | | |
| | TIM2 IC4 | TIM2 IC4 | |
| | | | |
| | TIM2 OCREFCLR | TIM2 OCREFCLR | |
| | | | |
| | TIM3 IC1 | TIM3 IC1 | |
| | | | |
| | TIM3 OCREFCLR | TIM3 OCREFCLR | |
| +---------------------------------+ |
| |
| */ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "stm32f0xx_hal.h" |
| |
| #ifdef HAL_COMP_MODULE_ENABLED |
| |
| #if defined(STM32F051x8) || defined(STM32F058xx) || \ |
| defined(STM32F071xB) || defined(STM32F072xB) || defined(STM32F078xx) || \ |
| defined(STM32F091xC) || defined (STM32F098xx) |
| |
| /** @addtogroup STM32F0xx_HAL_Driver |
| * @{ |
| */ |
| |
| /** @defgroup COMP COMP |
| * @brief COMP HAL module driver |
| * @{ |
| */ |
| |
| /* Private typedef -----------------------------------------------------------*/ |
| /* Private define ------------------------------------------------------------*/ |
| |
| /** @defgroup COMP_Private_Constants 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 (60U) /*!< Delay for COMP startup time */ |
| |
| /* CSR register reset value */ |
| #define COMP_CSR_RESET_VALUE (0x00000000U) |
| /* CSR register masks */ |
| #define COMP_CSR_RESET_PARAMETERS_MASK (0x00003FFFU) |
| #define COMP_CSR_UPDATE_PARAMETERS_MASK (0x00003FFEU) |
| /* CSR COMPx non inverting input mask */ |
| #define COMP_CSR_COMPxNONINSEL_MASK ((uint16_t)COMP_CSR_COMP1SW1) |
| /* CSR COMP2 shift */ |
| #define COMP_CSR_COMP1_SHIFT 0U |
| #define COMP_CSR_COMP2_SHIFT 16U |
| /** |
| * @} |
| */ |
| /* Private macro -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| /* Private function prototypes -----------------------------------------------*/ |
| /* Private functions ---------------------------------------------------------*/ |
| |
| /** @defgroup COMP_Exported_Functions COMP Exported Functions |
| * @{ |
| */ |
| |
| /** @defgroup COMP_Exported_Functions_Group1 Initialization/de-initialization functions |
| * @brief Initialization and Configuration functions |
| * |
| @verbatim |
| =============================================================================== |
| ##### Initialization and Configuration functions ##### |
| =============================================================================== |
| [..] This section provides functions to initialize and de-initialize comparators |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Initializes the COMP according to the specified |
| * parameters in the COMP_InitTypeDef and create 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) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) |
| { |
| status = HAL_ERROR; |
| } |
| else |
| { |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| assert_param(IS_COMP_INVERTINGINPUT(hcomp->Init.InvertingInput)); |
| assert_param(IS_COMP_NONINVERTINGINPUT(hcomp->Init.NonInvertingInput)); |
| assert_param(IS_COMP_OUTPUT(hcomp->Init.Output)); |
| assert_param(IS_COMP_OUTPUTPOL(hcomp->Init.OutputPol)); |
| assert_param(IS_COMP_HYSTERESIS(hcomp->Init.Hysteresis)); |
| assert_param(IS_COMP_MODE(hcomp->Init.Mode)); |
| |
| if(hcomp->Init.NonInvertingInput == COMP_NONINVERTINGINPUT_DAC1SWITCHCLOSED) |
| { |
| assert_param(IS_COMP_DAC1SWITCH_INSTANCE(hcomp->Instance)); |
| } |
| |
| if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE) |
| { |
| assert_param(IS_COMP_WINDOWMODE_INSTANCE(hcomp->Instance)); |
| } |
| |
| /* Init SYSCFG and the low level hardware to access comparators */ |
| __HAL_RCC_SYSCFG_CLK_ENABLE(); |
| |
| /* Init the low level hardware : SYSCFG to access comparators */ |
| HAL_COMP_MspInit(hcomp); |
| |
| if(hcomp->State == HAL_COMP_STATE_RESET) |
| { |
| /* Allocate lock resource and initialize it */ |
| hcomp->Lock = HAL_UNLOCKED; |
| } |
| |
| /* Change COMP peripheral state */ |
| hcomp->State = HAL_COMP_STATE_BUSY; |
| |
| /* Set COMP parameters */ |
| /* Set COMPxINSEL bits according to hcomp->Init.InvertingInput value */ |
| /* Set COMPxOUTSEL bits according to hcomp->Init.Output value */ |
| /* Set COMPxPOL bit according to hcomp->Init.OutputPol value */ |
| /* Set COMPxHYST bits according to hcomp->Init.Hysteresis value */ |
| /* Set COMPxMODE bits according to hcomp->Init.Mode value */ |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| MODIFY_REG(COMP->CSR, |
| (COMP_CSR_COMPxINSEL | COMP_CSR_COMPxNONINSEL_MASK | \ |
| COMP_CSR_COMPxOUTSEL | COMP_CSR_COMPxPOL | \ |
| COMP_CSR_COMPxHYST | COMP_CSR_COMPxMODE) << regshift, |
| (hcomp->Init.InvertingInput | \ |
| hcomp->Init.NonInvertingInput | \ |
| hcomp->Init.Output | \ |
| hcomp->Init.OutputPol | \ |
| hcomp->Init.Hysteresis | \ |
| hcomp->Init.Mode) << regshift); |
| |
| if(hcomp->Init.WindowMode != COMP_WINDOWMODE_DISABLE) |
| { |
| COMP->CSR |= COMP_CSR_WNDWEN; |
| } |
| |
| /* Initialize the COMP state*/ |
| hcomp->State = HAL_COMP_STATE_READY; |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief DeInitializes the COMP peripheral |
| * @note Deinitialization can't 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; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) |
| { |
| status = HAL_ERROR; |
| } |
| else |
| { |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| /* Set COMP_CSR register to reset value for the corresponding COMP instance */ |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| MODIFY_REG(COMP->CSR, |
| COMP_CSR_RESET_PARAMETERS_MASK << regshift, |
| COMP_CSR_RESET_VALUE << regshift); |
| |
| /* DeInit the low level hardware: SYSCFG, GPIO, CLOCK and NVIC */ |
| HAL_COMP_MspDeInit(hcomp); |
| |
| hcomp->State = HAL_COMP_STATE_RESET; |
| |
| /* Release Lock */ |
| __HAL_UNLOCK(hcomp); |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Initializes 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 implenetd in the user file |
| */ |
| } |
| |
| /** |
| * @brief DeInitializes 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 implenetd in the user file |
| */ |
| } |
| |
| /** |
| * @} |
| */ |
| |
| /** @defgroup COMP_Exported_Functions_Group2 I/O operation functions |
| * @brief Data transfers functions |
| * |
| @verbatim |
| =============================================================================== |
| ##### IO operation functions ##### |
| =============================================================================== |
| [..] |
| This subsection provides a set of functions allowing to manage the COMP data |
| transfers. |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Start the comparator |
| * @param hcomp COMP handle |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_Start(COMP_HandleTypeDef *hcomp) |
| { |
| uint32_t wait_loop_index = 0U; |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) |
| { |
| 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 */ |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| SET_BIT(COMP->CSR, COMP_CSR_COMPxEN << regshift); |
| |
| /* Set HAL COMP handle state */ |
| hcomp->State = HAL_COMP_STATE_BUSY; |
| |
| /* Delay for COMP startup time */ |
| wait_loop_index = (COMP_DELAY_STARTUP_US * (SystemCoreClock / 1000000U)); |
| 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; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) |
| { |
| status = HAL_ERROR; |
| } |
| else |
| { |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| if(hcomp->State == HAL_COMP_STATE_BUSY) |
| { |
| /* Disable the selected comparator */ |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| CLEAR_BIT(COMP->CSR, COMP_CSR_COMPxEN << regshift); |
| |
| hcomp->State = HAL_COMP_STATE_READY; |
| } |
| else |
| { |
| status = HAL_ERROR; |
| } |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Enables the interrupt and starts the comparator |
| * @param hcomp COMP handle |
| * @retval HAL status. |
| */ |
| HAL_StatusTypeDef HAL_COMP_Start_IT(COMP_HandleTypeDef *hcomp) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t extiline = 0U; |
| |
| /* Check the parameter */ |
| assert_param(IS_COMP_TRIGGERMODE(hcomp->Init.TriggerMode)); |
| |
| status = HAL_COMP_Start(hcomp); |
| if(status == HAL_OK) |
| { |
| /* Check the Exti Line output configuration */ |
| extiline = COMP_GET_EXTI_LINE(hcomp->Instance); |
| /* Configure the rising edge */ |
| if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_RISING) != RESET) |
| { |
| SET_BIT(EXTI->RTSR, extiline); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->RTSR, extiline); |
| } |
| /* Configure the falling edge */ |
| if((hcomp->Init.TriggerMode & COMP_TRIGGERMODE_IT_FALLING) != RESET) |
| { |
| SET_BIT(EXTI->FTSR, extiline); |
| } |
| else |
| { |
| CLEAR_BIT(EXTI->FTSR, extiline); |
| } |
| |
| /* Clear COMP EXTI pending bit */ |
| WRITE_REG(EXTI->PR, extiline); |
| |
| /* Enable Exti interrupt mode */ |
| SET_BIT(EXTI->IMR, extiline); |
| } |
| |
| return status; |
| } |
| |
| /** |
| * @brief Disable the interrupt and Stop the comparator |
| * @param hcomp COMP handle |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_Stop_IT(COMP_HandleTypeDef *hcomp) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| |
| /* Disable the Exti Line interrupt mode */ |
| CLEAR_BIT(EXTI->IMR, COMP_GET_EXTI_LINE(hcomp->Instance)); |
| |
| status = HAL_COMP_Stop(hcomp); |
| |
| return status; |
| } |
| |
| /** |
| * @brief Comparator IRQ Handler |
| * @param hcomp COMP handle |
| * @retval HAL status |
| */ |
| void HAL_COMP_IRQHandler(COMP_HandleTypeDef *hcomp) |
| { |
| uint32_t extiline = COMP_GET_EXTI_LINE(hcomp->Instance); |
| |
| /* Check COMP Exti flag */ |
| if(READ_BIT(EXTI->PR, extiline) != RESET) |
| { |
| /* Clear COMP Exti pending bit */ |
| WRITE_REG(EXTI->PR, extiline); |
| |
| /* 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 COMP data |
| transfers. |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Lock the selected comparator configuration. |
| * @param hcomp COMP handle |
| * @retval HAL status |
| */ |
| HAL_StatusTypeDef HAL_COMP_Lock(COMP_HandleTypeDef *hcomp) |
| { |
| HAL_StatusTypeDef status = HAL_OK; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the COMP handle allocation and lock status */ |
| if((hcomp == NULL) || ((hcomp->State & COMP_STATE_BIT_LOCK) != RESET)) |
| { |
| status = HAL_ERROR; |
| } |
| else |
| { |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| /* Set lock flag */ |
| hcomp->State |= COMP_STATE_BIT_LOCK; |
| |
| /* Set the lock bit corresponding to selected comparator */ |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| SET_BIT(COMP->CSR, COMP_CSR_COMPxLOCK << regshift); |
| } |
| |
| 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 non-inverting input is at a lower |
| * voltage than the inverting input |
| * - Comparator output is high when the non-inverting input is at a higher |
| * voltage than the inverting input |
| * If the polarity is inverted: |
| * - Comparator output is high when the non-inverting input is at a lower |
| * voltage than the inverting input |
| * - Comparator output is low when the non-inverting input is at a higher |
| * voltage than the inverting input |
| * @param hcomp COMP handle |
| * @retval Returns the selected comparator output level: COMP_OUTPUTLEVEL_LOW or COMP_OUTPUTLEVEL_HIGH. |
| * |
| */ |
| uint32_t HAL_COMP_GetOutputLevel(COMP_HandleTypeDef *hcomp) |
| { |
| uint32_t level=0; |
| uint32_t regshift = COMP_CSR_COMP1_SHIFT; |
| |
| /* Check the parameter */ |
| assert_param(IS_COMP_ALL_INSTANCE(hcomp->Instance)); |
| |
| if(hcomp->Instance == COMP2) |
| { |
| regshift = COMP_CSR_COMP2_SHIFT; |
| } |
| level = READ_BIT(COMP->CSR, COMP_CSR_COMPxOUT << regshift); |
| |
| if(level != 0U) |
| { |
| return(COMP_OUTPUTLEVEL_HIGH); |
| } |
| return(COMP_OUTPUTLEVEL_LOW); |
| } |
| |
| /** |
| * @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 |
| and the data flow. |
| |
| @endverbatim |
| * @{ |
| */ |
| |
| /** |
| * @brief Return the COMP state |
| * @param hcomp COMP handle |
| * @retval HAL state |
| */ |
| uint32_t 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 hcomp->State; |
| } |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* STM32F051x8 || STM32F058xx || */ |
| /* STM32F071xB || STM32F072xB || STM32F078xx || */ |
| /* STM32F091xC || defined (STM32F098xx) */ |
| |
| #endif /* HAL_COMP_MODULE_ENABLED */ |
| |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
