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323 lines
13 KiB
323 lines
13 KiB
/**
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******************************************************************************
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* @file stm32l0xx_ll_comp.c
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* @author MCD Application Team
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* @brief COMP LL module driver
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/* Includes ------------------------------------------------------------------*/
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#include "stm32l0xx_ll_comp.h"
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#ifdef USE_FULL_ASSERT
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#include "stm32_assert.h"
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#else
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#define assert_param(expr) ((void)0U)
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#endif
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/** @addtogroup STM32L0xx_LL_Driver
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* @{
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*/
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#if defined (COMP1) || defined (COMP2)
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/** @addtogroup COMP_LL COMP
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/** @addtogroup COMP_LL_Private_Macros
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* @{
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*/
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/* Check of parameters for configuration of COMP hierarchical scope: */
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/* COMP instance. */
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#define IS_LL_COMP_POWER_MODE(__POWER_MODE__) \
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( ((__POWER_MODE__) == LL_COMP_POWERMODE_MEDIUMSPEED) \
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|| ((__POWER_MODE__) == LL_COMP_POWERMODE_ULTRALOWPOWER) \
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)
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#if defined (STM32L011xx) || defined (STM32L021xx)
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#define IS_LL_COMP_INPUT_PLUS(__COMP_INSTANCE__, __INPUT_PLUS__) \
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(((__COMP_INSTANCE__) == COMP1) \
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? ( \
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(__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1 \
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) \
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: \
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( \
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((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO2) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO3) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO4) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO5) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO6) \
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) \
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)
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#else
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#define IS_LL_COMP_INPUT_PLUS(__COMP_INSTANCE__, __INPUT_PLUS__) \
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(((__COMP_INSTANCE__) == COMP1) \
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? ( \
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(__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1 \
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) \
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: \
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( \
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((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO2) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO3) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO4) \
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|| ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO5) \
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) \
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)
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#endif
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/* Note: On this STM32 serie, comparator input minus parameters are */
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/* the different depending on COMP instances. */
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#define IS_LL_COMP_INPUT_MINUS(__COMP_INSTANCE__, __INPUT_MINUS__) \
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(((__COMP_INSTANCE__) == COMP1) \
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? ( \
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((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_VREFINT) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH1) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH2) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO1) \
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) \
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: \
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( \
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((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_1_4VREFINT) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_1_2VREFINT) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_3_4VREFINT) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_VREFINT) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH1) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH2) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO1) \
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|| ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO2) \
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) \
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)
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#define IS_LL_COMP_OUTPUT_POLARITY(__POLARITY__) \
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( ((__POLARITY__) == LL_COMP_OUTPUTPOL_NONINVERTED) \
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|| ((__POLARITY__) == LL_COMP_OUTPUTPOL_INVERTED) \
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)
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/**
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* @}
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*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @addtogroup COMP_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup COMP_LL_EF_Init
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* @{
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*/
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/**
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* @brief De-initialize registers of the selected COMP instance
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* to their default reset values.
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* @note If comparator is locked, de-initialization by software is
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* not possible.
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* The only way to unlock the comparator is a device hardware reset.
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* @param COMPx COMP instance
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: COMP registers are de-initialized
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* - ERROR: COMP registers are not de-initialized
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*/
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ErrorStatus LL_COMP_DeInit(COMP_TypeDef *COMPx)
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{
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ErrorStatus status = SUCCESS;
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/* Check the parameters */
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assert_param(IS_COMP_ALL_INSTANCE(COMPx));
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/* Note: Hardware constraint (refer to description of this function): */
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/* COMP instance must not be locked. */
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if(LL_COMP_IsLocked(COMPx) == 0U)
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{
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if(COMPx == COMP1)
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{
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CLEAR_BIT(COMPx->CSR,
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( COMP_CSR_COMP1EN
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| COMP_CSR_COMP1INNSEL
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| COMP_CSR_COMP1WM
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| COMP_CSR_COMP1LPTIM1IN1
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| COMP_CSR_COMP1POLARITY
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| COMP_CSR_COMP1LOCK
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)
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);
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}
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else
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{
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CLEAR_BIT(COMPx->CSR,
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( COMP_CSR_COMP2EN
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| COMP_CSR_COMP2SPEED
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| COMP_CSR_COMP2INNSEL
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| COMP_CSR_COMP2INPSEL
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| COMP_CSR_COMP2LPTIM1IN2
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| COMP_CSR_COMP2LPTIM1IN1
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| COMP_CSR_COMP2POLARITY
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| COMP_CSR_COMP2LOCK
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)
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);
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}
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}
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else
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{
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/* Comparator instance is locked: de-initialization by software is */
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/* not possible. */
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/* The only way to unlock the comparator is a device hardware reset. */
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status = ERROR;
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}
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return status;
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}
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/**
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* @brief Initialize some features of COMP instance.
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* @note This function configures features of the selected COMP instance.
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* Some features are also available at scope COMP common instance
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* (common to several COMP instances).
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* Refer to functions having argument "COMPxy_COMMON" as parameter.
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* @param COMPx COMP instance
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* @param COMP_InitStruct Pointer to a @ref LL_COMP_InitTypeDef structure
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: COMP registers are initialized
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* - ERROR: COMP registers are not initialized
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*/
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ErrorStatus LL_COMP_Init(COMP_TypeDef *COMPx, LL_COMP_InitTypeDef *COMP_InitStruct)
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{
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ErrorStatus status = SUCCESS;
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/* Check the parameters */
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assert_param(IS_COMP_ALL_INSTANCE(COMPx));
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if(COMPx == COMP2)
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{
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assert_param(IS_LL_COMP_POWER_MODE(COMP_InitStruct->PowerMode));
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assert_param(IS_LL_COMP_INPUT_PLUS(COMPx, COMP_InitStruct->InputPlus));
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}
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assert_param(IS_LL_COMP_INPUT_MINUS(COMPx, COMP_InitStruct->InputMinus));
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assert_param(IS_LL_COMP_OUTPUT_POLARITY(COMP_InitStruct->OutputPolarity));
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/* Note: Hardware constraint (refer to description of this function) */
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/* COMP instance must not be locked. */
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if(LL_COMP_IsLocked(COMPx) == 0U)
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{
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/* Configuration of comparator instance : */
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/* - PowerMode */
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/* - InputPlus */
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/* - InputMinus */
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/* - OutputPolarity */
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/* Note: Connection switch is applicable only to COMP instance COMP1, */
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/* therefore is COMP2 is selected the equivalent bit is */
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/* kept unmodified. */
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if(COMPx == COMP1)
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{
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MODIFY_REG(COMPx->CSR,
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( COMP_CSR_COMP1INNSEL
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| COMP_CSR_COMP1POLARITY
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)
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,
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( COMP_InitStruct->InputMinus
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| COMP_InitStruct->OutputPolarity
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)
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);
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}
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else
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{
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MODIFY_REG(COMPx->CSR,
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( COMP_CSR_COMP2SPEED
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| COMP_CSR_COMP2INPSEL
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| COMP_CSR_COMP2INNSEL
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| COMP_CSR_COMP2POLARITY
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)
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,
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( COMP_InitStruct->PowerMode
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| COMP_InitStruct->InputPlus
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| COMP_InitStruct->InputMinus
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| COMP_InitStruct->OutputPolarity
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)
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);
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}
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}
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else
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{
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/* Initialization error: COMP instance is locked. */
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status = ERROR;
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}
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return status;
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}
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/**
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* @brief Set each @ref LL_COMP_InitTypeDef field to default value.
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* @param COMP_InitStruct: pointer to a @ref LL_COMP_InitTypeDef structure
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* whose fields will be set to default values.
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* @retval None
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*/
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void LL_COMP_StructInit(LL_COMP_InitTypeDef *COMP_InitStruct)
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{
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/* Set COMP_InitStruct fields to default values */
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COMP_InitStruct->PowerMode = LL_COMP_POWERMODE_MEDIUMSPEED;
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COMP_InitStruct->InputPlus = LL_COMP_INPUT_PLUS_IO1;
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COMP_InitStruct->InputMinus = LL_COMP_INPUT_MINUS_VREFINT;
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COMP_InitStruct->OutputPolarity = LL_COMP_OUTPUTPOL_NONINVERTED;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* COMP1 || COMP2 */
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/**
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* @}
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*/
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#endif /* USE_FULL_LL_DRIVER */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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