/**
******************************************************************************
* @file stm32l1xx_ll_opamp.c
* @author MCD Application Team
* @brief OPAMP LL module driver
******************************************************************************
* @attention
*
* Copyright (c) 2017 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 "stm32l1xx_ll_opamp.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32L1xx_LL_Driver
* @{
*/
#if defined (OPAMP1) || defined (OPAMP2) || defined (OPAMP3)
/** @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_POWER_MODE(__POWER_MODE__) \
( ((__POWER_MODE__) == LL_OPAMP_POWERMODE_NORMAL) \
|| ((__POWER_MODE__) == LL_OPAMP_POWERMODE_LOWPOWER))
#define IS_LL_OPAMP_FUNCTIONAL_MODE(__FUNCTIONAL_MODE__) \
( ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_STANDALONE) \
|| ((__FUNCTIONAL_MODE__) == LL_OPAMP_MODE_FOLLOWER) \
)
/* Note: Comparator non-inverting inputs parameters are different */
/* depending on OPAMP instance. */
#if defined(OPAMP3)
#define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
(((__OPAMPX__) == OPAMP1) \
? ( \
((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
) \
: \
(((__OPAMPX__) == OPAMP2) \
? ( \
((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \
) \
: \
( \
((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2_OPAMP3) \
) \
) \
)
#else
#define IS_LL_OPAMP_INPUT_NONINVERTING(__OPAMPX__, __INPUT_NONINVERTING__) \
(((__OPAMPX__) == OPAMP1) \
? ( \
((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
) \
: \
( \
((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINVERT_IO0) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH1) \
|| ((__INPUT_NONINVERTING__) == LL_OPAMP_INPUT_NONINV_DAC1_CH2) \
) \
)
#endif
/* 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.
* @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));
MODIFY_REG(OPAMP->CSR,
(OPAMP_CSR_S3SEL1 | OPAMP_CSR_S4SEL1 | OPAMP_CSR_S5SEL1 | OPAMP_CSR_S6SEL1 | OPAMP_CSR_OPA1CAL_L | OPAMP_CSR_OPA1CAL_H | OPAMP_CSR_OPA1LPM) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
| (OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx)
| (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx)) ,
(OPAMP_CSR_OPA1PD) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
);
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.
* @note This function configures features of the selected OPAMP instance.
* Some features are also available at scope OPAMP common instance
* (common to several OPAMP instances).
* Refer to functions having argument "OPAMPxy_COMMON" as parameter.
* @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)
{
/* Check the parameters */
assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
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. */
/* 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));
}
/* Configuration of OPAMP instance : */
/* - PowerMode */
/* - Functional mode */
/* - Input non-inverting */
/* - Input inverting */
/* Note: Bits OPAMP_CSR_OPAxCAL_y reset to ensure to be in functional mode */
if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
{
MODIFY_REG(OPAMP->CSR,
((
OPAMP_CSR_OPA1LPM
| OPAMP_CSR_S3SEL1
| OPAMP_CSR_OPA1CAL_H
| OPAMP_CSR_OPA1CAL_L
| OPAMP_CSR_S5SEL1
| OPAMP_CSR_S6SEL1
| OPAMP_CSR_S4SEL1
) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
)
| ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
| (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
,
((
(OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
| OPAMP_InitStruct->FunctionalMode
| OPAMP_InitStruct->InputNonInverting
| (OPAMP_InitStruct->InputInverting & OPAMP_CSR_S4SEL1)
) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
)
| ((OPAMP_InitStruct->InputInverting & OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
| ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
);
}
else
{
MODIFY_REG(OPAMP->CSR,
((
OPAMP_CSR_OPA1LPM
| OPAMP_CSR_OPA1CAL_H
| OPAMP_CSR_OPA1CAL_L
| OPAMP_CSR_S5SEL1
| OPAMP_CSR_S6SEL1
| OPAMP_CSR_S4SEL1
) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
)
| ((OPAMP_CSR_ANAWSEL1) << __OPAMP_INSTANCE_DECIMAL(OPAMPx))
| (OPAMP_CSR_S7SEL2 * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
,
((
(OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
| OPAMP_InitStruct->FunctionalMode
| OPAMP_InitStruct->InputNonInverting
| OPAMP_CSR_S3SEL1
) << __OPAMP_INSTANCE_BITOFFSET(OPAMPx)
)
| ((OPAMP_InitStruct->InputNonInverting & OPAMP_CSR_S7SEL2) * __OPAMP_IS_INSTANCE_OPAMP2(OPAMPx))
);
}
return SUCCESS;
}
/**
* @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->PowerMode = LL_OPAMP_POWERMODE_NORMAL;
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 */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */