tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_comp_ex.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32l0xx_hal_comp_ex.c
   4   * @author  MCD Application Team
   5   * @version V1.2.0
   6   * @date    06-February-2015
   7   * @brief   Extended COMP HAL module driver.
   8   * @brief   This file provides firmware functions to manage the VREFINT
   9   *          which can act as input to the comparator.
  10   @verbatim
  11   ==============================================================================
  12                ##### COMP peripheral Extended features  #####
  13   ==============================================================================
  14
  15   [..] Comparing to other previous devices, the COMP interface for STM32L0XX
  16        devices contains the following additional features
  17
  18        (+) Possibility to enable or disable the VREFINT which is used as input
  19            to the comparator.
  20
  21
  22   @endverbatim
  23   ******************************************************************************
  24   * @attention
  25   *
  26   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
  27   *
  28   * Redistribution and use in source and binary forms, with or without modification,
  29   * are permitted provided that the following conditions are met:
  30   *   1. Redistributions of source code must retain the above copyright notice,
  31   *      this list of conditions and the following disclaimer.
  32   *   2. Redistributions in binary form must reproduce the above copyright notice,
  33   *      this list of conditions and the following disclaimer in the documentation
  34   *      and/or other materials provided with the distribution.
  35   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  36   *      may be used to endorse or promote products derived from this software
  37   *      without specific prior written permission.
  38   *
  39   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  40   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  42   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  43   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  44   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  45   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  46   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  47   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  48   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  49   *
  50   ******************************************************************************
  51   */
  52
  53 /* Includes ------------------------------------------------------------------*/
  54 #include "stm32l0xx_hal.h"
  55
  56 /** @addtogroup STM32L0xx_HAL_Driver
  57   * @{
  58   */
  59
  60 /** @addtogroup COMPEx
  61   * @brief Extended COMP HAL module driver
  62   * @{
  63   */
  64
  65 #ifdef HAL_COMP_MODULE_ENABLED
  66
  67
  68 /** @addtogroup COMPEx_Exported_Functions
  69   * @{
  70   */
  71
  72 /** @addtogroup COMPEx_Exported_Functions_Group1
  73   * @brief  Extended functions to manage VREFINT for the comparator
  74   *
  75   * @{
  76   */
  77
  78 /**
  79   * @brief  Enables the Buffer Vrefint for the COMP.
  80   * @note   This is functional only if the LOCK bit is not set
  81
  82   * @retval None
  83   */
  84 void HAL_COMPEx_EnableVREFINT(void)
  85 {
  86     /* Enable the Buffer for the COMP by setting EN_VREFINT bit and the ENBUFLP_VREFINT_COMP in the CFGR3 register */
  87
  88     SYSCFG->CFGR3 |= (SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP | SYSCFG_CFGR3_EN_VREFINT);
  89 }
  90
  91 /**
  92   * @brief  Disables the Buffer Vrefint for the COMP.
  93   * @note   This is functional only if the LOCK bit is not set
  94   * @retval None
  95   */
  96 void HAL_COMPEx_DisableVREFINT(void)
  97 {
  98     /* Disable the Vrefint by resetting ENBUFLP_BGAP_COMP bit and the EN_VREFINT bit in the CFGR3 register */
  99
 100     SYSCFG->CFGR3 &= (uint32_t)~((uint32_t)(SYSCFG_CFGR3_ENBUFLP_VREFINT_COMP | SYSCFG_CFGR3_EN_VREFINT));
 101 }
 102
 103 /**
 104   * @}
 105   */
 106
 107 /**
 108   * @}
 109   */
 110
 111
 112 #endif /* HAL_COMP_MODULE_ENABLED */
 113 /**
 114   * @}
 115   */
 116
 117 /**
 118   * @}
 119   */
 120 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/