Diff: targets/TARGET_STM/TARGET_STM32F0/device/stm32f0xx_hal_comp.c

Revision:

149:156823d33999

Parent:

144:ef7eb2e8f9f7

Child:

156:95d6b41a828b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/TARGET_STM32F0/device/stm32f0xx_hal_comp.c	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,746 @@
+/**
+  ******************************************************************************
+  * @file    stm32f0xx_hal_comp.c
+  * @author  MCD Application Team
+  * @version V1.4.0
+  * @date    27-May-2016
+  * @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>&copy; 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 LL_COMP_DELAY_STARTUP_US          ((uint32_t) 60U)  /*!< Delay for COMP startup time */
+
+/* CSR register reset value */ 
+#define COMP_CSR_RESET_VALUE            ((uint32_t)0x00000000)
+/* CSR register masks */ 
+#define COMP_CSR_RESET_PARAMETERS_MASK   ((uint32_t)0x00003FFF)
+#define COMP_CSR_UPDATE_PARAMETERS_MASK  ((uint32_t)0x00003FFE)
+/* 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 = 0;
+  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 = (LL_COMP_DELAY_STARTUP_US * (SystemCoreClock / 1000000));
+      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;
+  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 = 0;
+  
+  /* 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 != 0)
+  {
+    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****/