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stm32f3xx_ll_opamp.c
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stm32f3xx_ll_opamp.c
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/**
******************************************************************************
* @file stm32f3xx_ll_opamp.c
* @author MCD Application Team
* @brief OPAMP LL module driver
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32f3xx_ll_opamp.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32F3xx_LL_Driver
* @{
*/
#if defined (OPAMP1) || defined (OPAMP2) || defined (OPAMP3) || defined (OPAMP4)
/** @addtogroup OPAMP_LL OPAMP
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup OPAMP_LL_Private_Macros
* @{
*/
/* Check of parameters for configuration of OPAMP hierarchical scope: */
/* OPAMP instance. */
#define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \
( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \
|| ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \
|| ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_PGA) \
)
/* Note: Comparator non-inverting inputs parameters are the same on all */
/* OPAMP instances. */
/* However, comparator instance kept as macro parameter for */
/* compatibility with other STM32 families. */
#define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
( ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO1) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO2) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO3) \
)
/* Note: Comparator non-inverting inputs parameters are the same on all */
/* OPAMP instances. */
/* However, comparator instance kept as macro parameter for */
/* compatibility with other STM32 families. */
#define IS_LL_OPAMP_INPUT_INVERTING(__OPAMPX__, __INPUT_INVERTING__) \
( ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO0) \
|| ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_IO1) \
|| ((__INPUT_INVERTING__) == LL_OPAMP_INPUT_INVERT_CONNECT_NO) \
)
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup OPAMP_LL_Exported_Functions
* @{
*/
/** @addtogroup OPAMP_LL_EF_Init
* @{
*/
/**
* @brief De-initialize registers of the selected OPAMP instance
* to their default reset values.
* @note If comparator is locked, de-initialization by software is
* not possible.
* The only way to unlock the comparator is a device hardware reset.
* @param OPAMPx OPAMP instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: OPAMP registers are de-initialized
* - ERROR: OPAMP registers are not de-initialized
*/
ErrorStatus LL_OPAMP_DeInit(OPAMP_TypeDef* OPAMPx)
{
ErrorStatus status = SUCCESS;
/* Check the parameters */
assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
/* Note: Hardware constraint (refer to description of this function): */
/* OPAMP instance must not be locked. */
if (LL_OPAMP_IsLocked(OPAMPx) == 0U)
{
LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);
}
else
{
/* OPAMP instance is locked: de-initialization by software is */
/* not possible. */
/* The only way to unlock the OPAMP is a device hardware reset. */
status = ERROR;
}
return status;
}
/**
* @brief Initialize some features of OPAMP instance.
* @note This function reset bit of calibration mode to ensure
* to be in functional mode, in order to have OPAMP parameters
* (inputs selection, ...) set with the corresponding OPAMP mode
* to be effective.
* @param OPAMPx OPAMP instance
* @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
* @retval An ErrorStatus enumeration value:
* - SUCCESS: OPAMP registers are initialized
* - ERROR: OPAMP registers are not initialized
*/
ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
{
ErrorStatus status = SUCCESS;
/* Check the parameters */
assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));
/* Note: OPAMP inverting input can be used with OPAMP in mode standalone */
/* or PGA with external capacitors for filtering circuit. */
/* Otherwise (OPAMP in mode follower), OPAMP inverting input is */
/* not used (not connected to GPIO pin). */
if (OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
{
assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
}
/* Note: Hardware constraint (refer to description of this function): */
/* OPAMP instance must not be locked. */
if (LL_OPAMP_IsLocked(OPAMPx) == 0U)
{
/* Configuration of OPAMP instance : */
/* - Functional mode */
/* - Input non-inverting */
/* - Input inverting */
/* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode. */
if (OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
{
MODIFY_REG(OPAMPx->CSR,
OPAMP_CSR_CALON
| OPAMP_CSR_VMSEL
| OPAMP_CSR_VPSEL
,
OPAMP_InitStruct->FunctionalMode
| OPAMP_InitStruct->InputNonInverting
| OPAMP_InitStruct->InputInverting
);
}
else
{
MODIFY_REG(OPAMPx->CSR,
OPAMP_CSR_CALON
| OPAMP_CSR_VMSEL
| OPAMP_CSR_VPSEL
,
LL_OPAMP_MODE_FOLLOWER
| OPAMP_InitStruct->InputNonInverting
);
}
}
else
{
/* Initialization error: OPAMP instance is locked. */
status = ERROR;
}
return status;
}
/**
* @brief Set each @ref LL_OPAMP_InitTypeDef field to default value.
* @param OPAMP_InitStruct pointer to a @ref LL_OPAMP_InitTypeDef structure
* whose fields will be set to default values.
* @retval None
*/
void LL_OPAMP_StructInit(LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
{
/* Set OPAMP_InitStruct fields to default values */
OPAMP_InitStruct->FunctionalMode = LL_OPAMP_MODE_FOLLOWER;
OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
/* Note: Parameter discarded if OPAMP in functional mode follower, */
/* set anyway to its default value. */
OPAMP_InitStruct->InputInverting = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* OPAMP1 || OPAMP2 || OPAMP3 || OPAMP4 */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */