225 lines
8.2 KiB
C
225 lines
8.2 KiB
C
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/**
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******************************************************************************
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* @file stm32l4xx_ll_opamp.c
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* @author MCD Application Team
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* @brief OPAMP LL module driver
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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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 "stm32l4xx_ll_opamp.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 STM32L4xx_LL_Driver
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* @{
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*/
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#if defined (OPAMP1) || defined (OPAMP2)
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/** @addtogroup OPAMP_LL OPAMP
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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 OPAMP_LL_Private_Macros
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* @{
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*/
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/* Check of parameters for configuration of OPAMP hierarchical scope: */
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/* OPAMP instance. */
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#define IS_LL_OPAMP_POWER_MODE(__POWER_MODE__) \
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( ((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMALPOWER) \
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|| ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER))
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#define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \
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( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \
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|| ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \
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|| ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_PGA) \
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)
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/* Note: Comparator non-inverting inputs parameters are the same on all */
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/* OPAMP instances. */
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/* However, comparator instance kept as macro parameter for */
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/* compatibility with other STM32 families. */
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#define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
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( ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
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|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
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)
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/* Note: Comparator non-inverting inputs parameters are the same on all */
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/* OPAMP instances. */
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/* However, comparator instance kept as macro parameter for */
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/* compatibility with other STM32 families. */
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#define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
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( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
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|| ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \
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|| ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
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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 OPAMP_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup OPAMP_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 OPAMP instance
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* to their default reset values.
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* @param OPAMPx OPAMP instance
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: OPAMP registers are de-initialized
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* - ERROR: OPAMP registers are not de-initialized
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*/
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ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx)
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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_OPAMP_ALL_INSTANCE(OPAMPx));
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LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);
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return status;
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}
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/**
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* @brief Initialize some features of OPAMP instance.
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* @note This function reset bit of calibration mode to ensure
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* to be in functional mode, in order to have OPAMP parameters
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* (inputs selection, ...) set with the corresponding OPAMP mode
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* to be effective.
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* @note This function configures features of the selected OPAMP instance.
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* Some features are also available at scope OPAMP common instance
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* (common to several OPAMP instances).
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* Refer to functions having argument "OPAMPxy_COMMON" as parameter.
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* @param OPAMPx OPAMP instance
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* @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: OPAMP registers are initialized
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* - ERROR: OPAMP registers are not initialized
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*/
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ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
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{
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/* Check the parameters */
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assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
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assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
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assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
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assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
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/* Note: OPAMP inverting input can be used with OPAMP in mode standalone */
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/* or PGA with external capacitors for filtering circuit. */
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/* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
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/* not used (not connected to GPIO pin). */
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if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
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{
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assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
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}
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/* Configuration of OPAMP instance : */
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/* - PowerMode */
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/* - Functional mode */
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/* - Input non-inverting */
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/* - Input inverting */
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/* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode. */
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if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
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{
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MODIFY_REG(OPAMPx->CSR,
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OPAMP_CSR_OPALPM
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| OPAMP_CSR_OPAMODE
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| OPAMP_CSR_CALON
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| OPAMP_CSR_VMSEL
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| OPAMP_CSR_VPSEL
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,
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(OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
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| OPAMP_InitStruct->FunctionalMode
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| OPAMP_InitStruct->InputNonInverting
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| OPAMP_InitStruct->InputInverting
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);
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}
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else
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{
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MODIFY_REG(OPAMPx->CSR,
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OPAMP_CSR_OPALPM
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| OPAMP_CSR_OPAMODE
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| OPAMP_CSR_CALON
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| OPAMP_CSR_VMSEL
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| OPAMP_CSR_VPSEL
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,
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(OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
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| LL_OPAMP_MODE_FOLLOWER
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| OPAMP_InitStruct->InputNonInverting
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| LL_OPAMP_INPUT_INVERT_CONNECT_NO
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);
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}
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return SUCCESS;
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}
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/**
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* @brief Set each @ref LL_OPAMP_InitTypeDef field to default value.
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* @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_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_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
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{
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/* Set OPAMP_InitStruct fields to default values */
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OPAMP_InitStruct->PowerMode = LL_OPAMP_POWERMODE_NORMALPOWER;
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OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER;
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OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
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/* Note: Parameter discarded if OPAMP in functional mode follower, */
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/* set anyway to its default value. */
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OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
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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 /* OPAMP1 || OPAMP2 */
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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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