/** ****************************************************************************** * @file stm32f3xx_ll_opamp.c * @author MCD Application Team * @version V1.3.0 * @date 01-July-2016 * @brief OPAMP LL module driver ****************************************************************************** * @attention * *

© COPYRIGHT(c) 2016 STMicroelectronics

* * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************** */ #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 */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/