--- /dev/null
+/**
+ ******************************************************************************
+ * @file stm32f30x_opamp.c
+ * @author MCD Application Team
+ * @version V1.1.0
+ * @date 27-February-2014
+ * @brief This file provides firmware functions to manage the following
+ * functionalities of the operational amplifiers (OPAMP1,...OPAMP4) peripheral:
+ * + OPAMP Configuration
+ * + OPAMP calibration
+ *
+ @verbatim
+
+ ==============================================================================
+ ##### OPAMP Peripheral Features #####
+ ==============================================================================
+
+ [..]
+ The device integrates 4 operational amplifiers OPAMP1, OPAMP2, OPAMP3 and OPAMP4:
+
+ (+) The OPAMPs non inverting input can be selected among the list shown by
+ table below.
+
+ (+) The OPAMPs inverting input can be selected among the list shown by
+ table below.
+
+ (+) The OPAMPs outputs can be internally connected to the inverting input
+ (follower mode)
+ (+) The OPAMPs outputs can be internally connected to resistor feedback
+ output (Programmable Gain Amplifier mode)
+
+ (+) The OPAMPs outputs can be internally connected to ADC
+
+ (+) The OPAMPs can be calibrated to compensate the offset compensation
+
+ (+) Timer-controlled Mux for automatic switch of inverting and
+ non-inverting input
+
+ OPAMPs inverting/non-inverting inputs:
+ +--------------------------------------------------------------+
+ | | | OPAMP1 | OPAMP2 | OPAMP3 | OPAMP4 |
+ |-----------------|--------|--------|--------|--------|--------|
+ | | PGA | OK | OK | OK | OK |
+ | Inverting Input | Vout | OK | OK | OK | OK |
+ | | IO1 | PC5 | PC5 | PB10 | PB10 |
+ | | IO2 | PA3 | PA5 | PB2 | PD8 |
+ |-----------------|--------|--------|--------|--------|--------|
+ | | IO1 | PA7 | PD14 | PB13 | PD11 |
+ | Non Inverting | IO2 | PA5 | PB14 | PA5 | PB11 |
+ | Input | IO3 | PA3 | PB0 | PA1 | PA4 |
+ | | IO4 | PA1 | PA7 | PB0 | PB13 |
+ +--------------------------------------------------------------+
+
+ ##### How to use this driver #####
+ ==============================================================================
+ [..]
+ This driver provides functions to configure and program the OPAMP
+ of all STM32F30x devices.
+
+ To use the OPAMP, perform the following steps:
+
+ (#) Enable the SYSCFG APB clock to get write access to OPAMP
+ register using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
+
+ (#) Configure the OPAMP input in analog mode using GPIO_Init()
+
+ (#) Configure the OPAMP using OPAMP_Init() function:
+ (++) Select the inverting input
+ (++) Select the non-inverting inverting input
+
+ (#) Enable the OPAMP using OPAMP_Cmd() function
+
+ @endverbatim
+
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
+ *
+ * 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.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f30x_opamp.h"
+
+/** @addtogroup STM32F30x_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup OPAMP
+ * @brief OPAMP driver modules
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define OPAMP_CSR_DEFAULT_MASK ((uint32_t)0xFFFFFF93)
+#define OPAMP_CSR_TIMERMUX_MASK ((uint32_t)0xFFFFF8FF)
+#define OPAMP_CSR_TRIMMING_MASK ((uint32_t)0x0000001F)
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup OPAMP_Private_Functions
+ * @{
+ */
+
+/** @defgroup OPAMP_Group1 Initialization and Configuration functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and Configuration functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Deinitializes OPAMP peripheral registers to their default reset values.
+ * @note Deinitialization can't be performed if the OPAMP configuration is locked.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param None
+ * @retval None
+ */
+void OPAMP_DeInit(uint32_t OPAMP_Selection)
+{
+ /*!< Set OPAMP_CSR register to reset value */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = ((uint32_t)0x00000000);
+}
+
+/**
+ * @brief Initializes the OPAMP peripheral according to the specified parameters
+ * in OPAMP_InitStruct
+ * @note If the selected OPAMP is locked, initialization can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure that contains
+ * the configuration information for the specified OPAMP peripheral.
+ * - OPAMP_InvertingInput specifies the inverting input of OPAMP
+ * - OPAMP_NonInvertingInput specifies the non inverting input of OPAMP
+ * @retval None
+ */
+void OPAMP_Init(uint32_t OPAMP_Selection, OPAMP_InitTypeDef* OPAMP_InitStruct)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_INVERTING_INPUT(OPAMP_InitStruct->OPAMP_InvertingInput));
+ assert_param(IS_OPAMP_NONINVERTING_INPUT(OPAMP_InitStruct->OPAMP_NonInvertingInput));
+
+ /*!< Get the OPAMPx_CSR register value */
+ tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
+
+ /*!< Clear the inverting and non inverting bits selection bits */
+ tmpreg &= (uint32_t) (OPAMP_CSR_DEFAULT_MASK);
+
+ /*!< Configure OPAMP: inverting and non inverting inputs */
+ tmpreg |= (uint32_t)(OPAMP_InitStruct->OPAMP_InvertingInput | OPAMP_InitStruct->OPAMP_NonInvertingInput);
+
+ /*!< Write to OPAMPx_CSR register */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
+}
+
+/**
+ * @brief Fills each OPAMP_InitStruct member with its default value.
+ * @param OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure which will
+ * be initialized.
+ * @retval None
+ */
+void OPAMP_StructInit(OPAMP_InitTypeDef* OPAMP_InitStruct)
+{
+ OPAMP_InitStruct->OPAMP_NonInvertingInput = OPAMP_NonInvertingInput_IO1;
+ OPAMP_InitStruct->OPAMP_InvertingInput = OPAMP_InvertingInput_IO1;
+}
+
+/**
+ * @brief Configure the feedback resistor gain.
+ * @note If the selected OPAMP is locked, gain configuration can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param NewState: new state of the OPAMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_PGAConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_PGAGain, uint32_t OPAMP_PGAConnect)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_PGAGAIN(OPAMP_PGAGain));
+ assert_param(IS_OPAMP_PGACONNECT(OPAMP_PGAConnect));
+
+ /* Reset the configuration bits */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_PGGAIN);
+
+ /* Set the new configuration */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_PGAGain | OPAMP_PGAConnect);
+}
+
+/**
+ * @brief Configure the OPAMP's internal reference.
+ * @note This feature is used when calibration enabled or OPAMP's reference
+ * connected to the non inverting input.
+ * @note If the selected OPAMP is locked, Vref configuration can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param OPAMP_Vref: This parameter can be:
+ * OPAMP_Vref_3VDDA: OPMAP Vref = 3.3% VDDA
+ * OPAMP_Vref_10VDDA: OPMAP Vref = 10% VDDA
+ * OPAMP_Vref_50VDDA: OPMAP Vref = 50% VDDA
+ * OPAMP_Vref_90VDDA: OPMAP Vref = 90% VDDA
+ * @retval None
+ */
+void OPAMP_VrefConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_Vref)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_VREF(OPAMP_Vref));
+
+ /*!< Get the OPAMPx_CSR register value */
+ tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
+
+ /*!< Clear the CALSEL bits */
+ tmpreg &= (uint32_t) (~OPAMP_CSR_CALSEL);
+
+ /*!< Configure OPAMP reference */
+ tmpreg |= (uint32_t)(OPAMP_Vref);
+
+ /*!< Write to OPAMPx_CSR register */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
+}
+
+/**
+ * @brief Connnect the internal reference to the OPAMP's non inverting input.
+ * @note If the selected OPAMP is locked, Vref configuration can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param NewState: new state of the OPAMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_VrefConnectNonInvertingInput(uint32_t OPAMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Connnect the internal reference to the OPAMP's non inverting input */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_FORCEVP);
+ }
+ else
+ {
+ /* Disconnnect the internal reference to the OPAMP's non inverting input */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_FORCEVP);
+ }
+}
+
+/**
+ * @brief Enables or disables connecting the OPAMP's internal reference to ADC.
+ * @note If the selected OPAMP is locked, Vref connection can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param NewState: new state of the Vrefint output.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_VrefConnectADCCmd(uint32_t OPAMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable output internal reference */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_TSTREF);
+ }
+ else
+ {
+ /* Disable output internal reference */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_TSTREF);
+ }
+}
+
+/**
+ * @brief Configure the OPAMP peripheral (secondary inputs) for timer-controlled
+ * mux mode according to the specified parameters in OPAMP_InitStruct.
+ * @note If the selected OPAMP is locked, timer-controlled mux configuration
+ * can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param OPAMP_InitStruct: pointer to an OPAMP_InitTypeDef structure that contains
+ * the configuration information for the specified OPAMP peripheral.
+ * - OPAMP_InvertingInput specifies the inverting input of OPAMP
+ * - OPAMP_NonInvertingInput specifies the non inverting input of OPAMP
+ * @note PGA and Vout can't be selected as seconadry inverting input.
+ * @retval None
+ */
+void OPAMP_TimerControlledMuxConfig(uint32_t OPAMP_Selection, OPAMP_InitTypeDef* OPAMP_InitStruct)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_SECONDARY_INVINPUT(OPAMP_InitStruct->OPAMP_InvertingInput));
+ assert_param(IS_OPAMP_NONINVERTING_INPUT(OPAMP_InitStruct->OPAMP_NonInvertingInput));
+
+ /*!< Get the OPAMPx_CSR register value */
+ tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
+
+ /*!< Clear the secondary inverting bit, secondary non inverting bit and TCMEN bits */
+ tmpreg &= (uint32_t) (OPAMP_CSR_TIMERMUX_MASK);
+
+ /*!< Configure OPAMP: secondary inverting and non inverting inputs */
+ tmpreg |= (uint32_t)((uint32_t)(OPAMP_InitStruct->OPAMP_InvertingInput<<3) | (uint32_t)(OPAMP_InitStruct->OPAMP_NonInvertingInput<<7));
+
+ /*!< Write to OPAMPx_CSR register */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
+}
+
+/**
+ * @brief Enable or disable the timer-controlled mux mode.
+ * @note If the selected OPAMP is locked, enable/disable can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param NewState: new state of the OPAMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_TimerControlledMuxCmd(uint32_t OPAMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the timer-controlled Mux mode */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_TCMEN);
+ }
+ else
+ {
+ /* Disable the timer-controlled Mux mode */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_TCMEN);
+ }
+}
+
+/**
+ * @brief Enable or disable the OPAMP peripheral.
+ * @note If the selected OPAMP is locked, enable/disable can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param NewState: new state of the OPAMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_Cmd(uint32_t OPAMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the selected OPAMPx peripheral */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_OPAMPxEN);
+ }
+ else
+ {
+ /* Disable the selected OPAMPx peripheral */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_OPAMPxEN);
+ }
+}
+
+/**
+ * @brief Return the output level (high or low) during calibration of the selected OPAMP.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * - OPAMP output is low when the non-inverting input is at a lower
+ * voltage than the inverting input
+ * - OPAMP output is high when the non-inverting input is at a higher
+ * voltage than the inverting input
+ * @note OPAMP ouput level is provided only during calibration phase.
+ * @retval Returns the selected OPAMP output level: low or high.
+ *
+ */
+uint32_t OPAMP_GetOutputLevel(uint32_t OPAMP_Selection)
+{
+ uint32_t opampout = 0x0;
+
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+
+ /* Check if selected OPAMP output is high */
+ if ((*(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) & (OPAMP_CSR_OUTCAL)) != 0)
+ {
+ opampout = OPAMP_OutputLevel_High;
+ }
+ else
+ {
+ opampout = OPAMP_OutputLevel_Low;
+ }
+
+ /* Return the OPAMP output level */
+ return (uint32_t)(opampout);
+}
+
+/**
+ * @brief Select the trimming mode.
+ * @param OffsetTrimming: the selected offset trimming mode.
+ * This parameter can be one of the following values:
+ * @arg OPAMP_Trimming_Factory: factory trimming values are used for offset
+ * calibration
+ * @arg OPAMP_Trimming_User: user trimming values are used for offset
+ * calibration
+ * @note When OffsetTrimming_User is selected, use OPAMP_OffsetTrimConfig()
+ * function or OPAMP_OffsetTrimLowPowerConfig() function to adjust
+ * trimming value.
+ * @retval None
+ */
+void OPAMP_OffsetTrimModeSelect(uint32_t OPAMP_Selection, uint32_t OPAMP_Trimming)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_TRIMMING(OPAMP_Trimming));
+
+ /* Reset USERTRIM bit */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (~(uint32_t) (OPAMP_CSR_USERTRIM));
+
+ /* Select trimming mode */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= OPAMP_Trimming;
+}
+
+/**
+ * @brief Configure the trimming value of the OPAMP.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param OPAMP_Input: the selected OPAMP input.
+ * This parameter can be one of the following values:
+ * @arg OPAMP_Input_Inverting: Inverting input is selected to configure the trimming value
+ * @arg OPAMP_Input_NonInverting: Non inverting input is selected to configure the trimming value
+ * @param OPAMP_TrimValue: the trimming value. This parameter can be any value lower
+ * or equal to 0x0000001F.
+ * @retval None
+ */
+void OPAMP_OffsetTrimConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_Input, uint32_t OPAMP_TrimValue)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_OPAMP_INPUT(OPAMP_Input));
+ assert_param(IS_OPAMP_TRIMMINGVALUE(OPAMP_TrimValue));
+
+ /*!< Get the OPAMPx_CSR register value */
+ tmpreg = *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection);
+
+ /*!< Clear the trimming bits */
+ tmpreg &= ((uint32_t)~(OPAMP_CSR_TRIMMING_MASK<<OPAMP_Input));
+
+ /*!< Configure the new trimming value */
+ tmpreg |= (uint32_t)(OPAMP_TrimValue<<OPAMP_Input);
+
+ /*!< Write to OPAMPx_CSR register */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) = tmpreg;
+}
+
+/**
+ * @brief Start or stop the calibration of selected OPAMP peripheral.
+ * @note If the selected OPAMP is locked, start/stop can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @param NewState: new state of the OPAMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * @retval None
+ */
+void OPAMP_StartCalibration(uint32_t OPAMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Start the OPAMPx calibration */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_CALON);
+ }
+ else
+ {
+ /* Stop the OPAMPx calibration */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_CALON);
+ }
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup OPAMP_Group2 OPAMP configuration locking function
+ * @brief OPAMP1,...OPAMP4 configuration locking function
+ * OPAMP1,...OPAMP4 configuration can be locked each separately.
+ * Unlocking is performed by system reset.
+ *
+@verbatim
+ ===============================================================================
+ ##### Configuration Lock function #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Lock the selected OPAMP configuration.
+ * @note Locking the configuration means that all control bits are read-only.
+ * To unlock the OPAMP configuration, perform a system reset.
+ * @param OPAMP_Selection: the selected OPAMP.
+ * This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
+ * to select the OPAMP peripheral.
+ * @retval None
+ */
+void OPAMP_LockConfig(uint32_t OPAMP_Selection)
+{
+ /* Check the parameter */
+ assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
+
+ /* Set the lock bit corresponding to selected OPAMP */
+ *(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_CSR_LOCK);
+}
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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