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Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_comp.c
- Revision:
- 125:23cc3068a9e4
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F302R8/stm32f30x_comp.c Wed Mar 19 10:15:22 2014 +0000
@@ -0,0 +1,514 @@
+/**
+ ******************************************************************************
+ * @file stm32f30x_comp.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 7 analog comparators (COMP1, COMP2...COMP7) peripheral:
+ * + Comparators configuration
+ * + Window mode control
+ *
+ @verbatim
+
+ ==============================================================================
+ ##### COMP Peripheral features #####
+ ==============================================================================
+ [..]
+ The device integrates 7 analog comparators COMP1, COMP2...COMP7:
+ (#) The non inverting input and inverting input can be set to GPIO pins
+ as shown in table1. COMP Inputs below.
+
+ (#) The COMP output is internally is available using COMP_GetOutputLevel()
+ and can be set on GPIO pins. Refer to table 2. COMP Outputs below.
+
+ (#) The COMP output can be redirected to embedded timers (TIM1, TIM2, TIM3...)
+ Refer to table 3. COMP Outputs redirection to embedded timers below.
+
+ (#) The comparators COMP1 and COMP2, COMP3 and COMP4, COMP5 and COMP6 can be combined in window
+ mode and only COMP1, COMP3 and COMP5 non inverting input can be used as non-inverting input.
+
+ (#) The seven comparators have interrupt capability with wake-up
+ from Sleep and Stop modes (through the EXTI controller):
+ (++) COMP1 is internally connected to EXTI Line 21
+ (++) COMP2 is internally connected to EXTI Line 22
+ (++) COMP3 is internally connected to EXTI Line 29
+ (++) COMP4 is internally connected to EXTI Line 30
+ (++) COMP5 is internally connected to EXTI Line 31
+ (++) COMP6 is internally connected to EXTI Line 32
+ (++) COMP7 is internally connected to EXTI Line 33
+
+ [..] Table 1. COMP Inputs
+ +------------------------------------------------------------------------------------------+
+ | | | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 |
+ |-----------------|----------------|---------------|---------------------------------------|
+ | | 1/4 VREFINT | OK | OK | OK | OK | OK | OK | OK |
+ | | 1/2 VREFINT | OK | OK | OK | OK | OK | OK | OK |
+ | | 3/4 VREFINT | OK | OK | OK | OK | OK | OK | OK |
+ | Inverting Input | VREFINT | OK | OK | OK | OK | OK | OK | OK |
+ | | DAC1 OUT1(PA4) | OK | OK | OK | OK | OK | OK | OK |
+ | | DAC1 OUT2(PA5) | OK | OK | OK | OK | OK | OK | OK |
+ | | IO1 | PA0 | PA2 | PD15 | PE8 | PD13 | PD10 | PC0 |
+ | | IO2 | --- | --- | PB12 | PB2 | PB10 | PB15 | --- |
+ | | DAC2 OUT1(PA6) | --- | OK | --- | OK | --- | OK | --- |
+ |-----------------|----------------|-------|-------|-------|-------|-------|-------|-------|
+ | Non Inverting | IO1 | PA1 | PA7 | PB14 | PB0 | PD12 | PD11 | PA0 |
+ | Input | IO2 | --- | PA3 | PD14 | PE7 | PB13 | PB11 | PC1 |
+ +------------------------------------------------------------------------------------------+
+
+ [..] Table 2. COMP Outputs
+ +-------------------------------------------------------+
+ | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 |
+ |-------|-------|-------|-------|-------|-------|-------|
+ | PA0 | PA2 | PB1 | PC8 | PC7 | PA10 | PC2 |
+ | PF4 | PA7 | --- | PA8 | PA9 | PC6 | --- |
+ | PA6 | PA12 | --- | --- | --- | --- | --- |
+ | PA11 | PB9 | --- | --- | --- | --- | --- |
+ | PB8 | --- | --- | --- | --- | --- | --- |
+ +-------------------------------------------------------+
+
+ [..] Table 3. COMP Outputs redirection to embedded timers
+ +----------------------------------------------------------------------------------------------------------------------+
+ | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 |
+ |----------------|----------------|----------------|----------------|----------------|----------------|----------------|
+ | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN | TIM1 BKIN |
+ | | | | | | | |
+ | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 |
+ | | | | | | | |
+ | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN | TIM8 BKIN |
+ | | | | | | | |
+ | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 | TIM8 BKIN2 |
+ | | | | | | | |
+ | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 | TIM1 BKIN2 |
+ | + | + | + | + | + | + | + |
+ | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 | TIM8BKIN2 |
+ | | | | | | | |
+ | TIM1 OCREFCLR | TIM1 OCREFCLR | TIM1 OCREFCLR | TIM8 OCREFCLR | TIM8 OCREFCLR | TIM8 OCREFCLR | TIM1 OCREFCLR |
+ | | | | | | | |
+ | TIM1 IC1 | TIM1 IC1 | TIM2 OCREFCLR | TIM3 IC3 | TIM2 IC1 | TIM2 IC2 | TIM8 OCREFCLR |
+ | | | | | | | |
+ | TIM2 IC4 | TIM2 IC4 | TIM3 IC2 | TIM3 OCREFCLR | TIM3 OCREFCLR | TIM2 OCREFCLR | TIM2 IC3 |
+ | | | | | | | |
+ | TIM2 OCREFCLR | TIM2 OCREFCLR | TIM4 IC1 | TIM4 IC2 | TIM4 IC3 | TIM16 OCREFCLR| TIM1 IC2 |
+ | | | | | | | |
+ | TIM3 IC1 | TIM3 IC1 | TIM15 IC1 | TIM15 OCREFCLR| TIM16 BKIN | TIM16 IC1 | TIM17 OCREFCLR|
+ | | | | | | | |
+ | TIM3 OCREFCLR | TIM3 OCREFCLR | TIM15 BKIN | TIM15 IC2 | TIM17 IC1 | TIM4 IC4 | TIM17 BKIN |
+ +----------------------------------------------------------------------------------------------------------------------+
+
+ [..] Table 4. COMP Outputs blanking sources
+ +----------------------------------------------------------------------------------------------------------------------+
+ | COMP1 | COMP2 | COMP3 | COMP4 | COMP5 | COMP6 | COMP7 |
+ |----------------|----------------|----------------|----------------|----------------|----------------|----------------|
+ | TIM1 OC5 | TIM1 OC5 | TIM1 OC5 | TIM3 OC4 | TIM3 OC3 | TIM2 OC4 | TIM1 OC5 |
+ | | | | | | | |
+ | TIM2 OC3 | TIM2 OC3 | -------- | TIM8 OC5 | TIM8 OC5 | TIM8 OC5 | TIM8 OC5 |
+ | | | | | | | |
+ | TIM3 OC3 | TIM3 OC3 | TIM2 OC4 | TIM15 OC1 | TIM8 BKIN | TIM15 OC2 | TIM15 OC2 |
+ | | | | | | | |
+ +----------------------------------------------------------------------------------------------------------------------+
+
+
+ ##### How to use this driver #####
+ ==============================================================================
+ [..]
+ This driver provides functions to configure and program the Comparators
+ of all STM32F30x devices.
+
+ To use the comparator, perform the following steps:
+
+ (#) Enable the SYSCFG APB clock to get write access to comparator
+ register using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
+
+ (#) Configure the comparator input in analog mode using GPIO_Init()
+
+ (#) Configure the comparator output in alternate function mode
+ using GPIO_Init() and use GPIO_PinAFConfig() function to map the
+ comparator output to the GPIO pin
+
+ (#) Configure the comparator using COMP_Init() function:
+ (++) Select the inverting input
+ (++) Select the non-inverting input
+ (++) Select the output polarity
+ (++) Select the output redirection
+ (++) Select the hysteresis level
+ (++) Select the power mode
+
+ (#) Enable the comparator using COMP_Cmd() function
+
+ (#) If required enable the COMP interrupt by configuring and enabling
+ EXTI line in Interrupt mode and selecting the desired sensitivity
+ level using EXTI_Init() function. After that enable the comparator
+ interrupt vector using NVIC_Init() 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_comp.h"
+
+/** @addtogroup STM32F30x_StdPeriph_Driver
+ * @{
+ */
+
+/** @defgroup COMP
+ * @brief COMP driver modules
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* CSR register Mask */
+#define COMP_CSR_CLEAR_MASK ((uint32_t)0x00000003)
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup COMP_Private_Functions
+ * @{
+ */
+
+/** @defgroup COMP_Group1 Initialization and Configuration functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and Configuration functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Deinitializes COMP peripheral registers to their default reset values.
+ * @note Deinitialization can't be performed if the COMP configuration is locked.
+ * To unlock the configuration, perform a system reset.
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 1 to 7
+ * to select the COMP peripheral.
+ * @param None
+ * @retval None
+ */
+void COMP_DeInit(uint32_t COMP_Selection)
+{
+ /*!< Set COMP_CSR register to reset value */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) = ((uint32_t)0x00000000);
+}
+
+/**
+ * @brief Initializes the COMP peripheral according to the specified parameters
+ * in COMP_InitStruct
+ * @note If the selected comparator is locked, initialization can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @note By default, PA1 is selected as COMP1 non inverting input.
+ * To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 1 to 7
+ * to select the COMP peripheral.
+ * @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure that contains
+ * the configuration information for the specified COMP peripheral.
+ * - COMP_InvertingInput specifies the inverting input of COMP
+ * - COMP_NonInvertingInput specifies the non inverting input of COMP
+ * - COMP_Output connect COMP output to selected timer
+ * input (Input capture / Output Compare Reference Clear / Break Input)
+ * - COMP_BlankingSrce specifies the blanking source of COMP
+ * - COMP_OutputPol select output polarity
+ * - COMP_Hysteresis configures COMP hysteresis value
+ * - COMP_Mode configures COMP power mode
+ * @retval None
+ */
+void COMP_Init(uint32_t COMP_Selection, COMP_InitTypeDef* COMP_InitStruct)
+{
+ uint32_t tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
+ assert_param(IS_COMP_INVERTING_INPUT(COMP_InitStruct->COMP_InvertingInput));
+ assert_param(IS_COMP_NONINVERTING_INPUT(COMP_InitStruct->COMP_NonInvertingInput));
+ assert_param(IS_COMP_OUTPUT(COMP_InitStruct->COMP_Output));
+ assert_param(IS_COMP_BLANKING_SOURCE(COMP_InitStruct->COMP_BlankingSrce));
+ assert_param(IS_COMP_OUTPUT_POL(COMP_InitStruct->COMP_OutputPol));
+ assert_param(IS_COMP_HYSTERESIS(COMP_InitStruct->COMP_Hysteresis));
+ assert_param(IS_COMP_MODE(COMP_InitStruct->COMP_Mode));
+
+ /*!< Get the COMPx_CSR register value */
+ tmpreg = *(__IO uint32_t *) (COMP_BASE + COMP_Selection);
+
+ /*!< Clear the COMP1SW1, COMPxINSEL, COMPxOUTSEL, COMPxPOL, COMPxHYST and COMPxMODE bits */
+ tmpreg &= (uint32_t) (COMP_CSR_CLEAR_MASK);
+
+ /*!< Configure COMP: inverting input, output redirection, hysteresis value and power mode */
+ /*!< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput value */
+ /*!< Set COMPxNONINSEL bits according to COMP_InitStruct->COMP_NonInvertingInput value */
+ /*!< Set COMPxBLANKING bits according to COMP_InitStruct->COMP_BlankingSrce value */
+ /*!< Set COMPxOUTSEL bits according to COMP_InitStruct->COMP_Output value */
+ /*!< Set COMPxPOL bit according to COMP_InitStruct->COMP_OutputPol value */
+ /*!< Set COMPxHYST bits according to COMP_InitStruct->COMP_Hysteresis value */
+ /*!< Set COMPxMODE bits according to COMP_InitStruct->COMP_Mode value */
+ tmpreg |= (uint32_t)(COMP_InitStruct->COMP_InvertingInput | COMP_InitStruct->COMP_NonInvertingInput |
+ COMP_InitStruct->COMP_Output | COMP_InitStruct->COMP_OutputPol | COMP_InitStruct->COMP_BlankingSrce |
+ COMP_InitStruct->COMP_Hysteresis | COMP_InitStruct->COMP_Mode);
+
+ /*!< Write to COMPx_CSR register */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) = tmpreg;
+}
+
+/**
+ * @brief Fills each COMP_InitStruct member with its default value.
+ * @param COMP_InitStruct: pointer to an COMP_InitTypeDef structure which will
+ * be initialized.
+ * @retval None
+ */
+void COMP_StructInit(COMP_InitTypeDef* COMP_InitStruct)
+{
+ COMP_InitStruct->COMP_InvertingInput = COMP_InvertingInput_1_4VREFINT;
+ COMP_InitStruct->COMP_NonInvertingInput = COMP_NonInvertingInput_IO1;
+ COMP_InitStruct->COMP_Output = COMP_Output_None;
+ COMP_InitStruct->COMP_BlankingSrce = COMP_BlankingSrce_None;
+ COMP_InitStruct->COMP_OutputPol = COMP_OutputPol_NonInverted;
+ COMP_InitStruct->COMP_Hysteresis = COMP_Hysteresis_No;
+ COMP_InitStruct->COMP_Mode = COMP_Mode_UltraLowPower;
+}
+
+/**
+ * @brief Enable or disable the COMP peripheral.
+ * @note If the selected comparator is locked, enable/disable can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 1 to 7
+ * to select the COMP peripheral.
+ * @param NewState: new state of the COMP peripheral.
+ * This parameter can be: ENABLE or DISABLE.
+ * When enabled, the comparator compares the non inverting input with
+ * the inverting input and the comparison result is available
+ * on comparator output.
+ * When disabled, the comparator doesn't perform comparison and the
+ * output level is low.
+ * @retval None
+ */
+void COMP_Cmd(uint32_t COMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the selected COMPx peripheral */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMPxEN);
+ }
+ else
+ {
+ /* Disable the selected COMP peripheral */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMPxEN);
+ }
+}
+
+/**
+ * @brief Close or Open the SW1 switch.
+ * @note If the COMP1 is locked, Close/Open the SW1 switch can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @note This switch is solely intended to redirect signals onto high
+ * impedance input, such as COMP1 non-inverting input (highly resistive switch)
+ * @param NewState: New state of the analog switch.
+ * This parameter can be
+ * ENABLE so the SW1 is closed; PA1 is connected to PA4
+ * or DISABLE so the SW1 switch is open; PA1 is disconnected from PA4
+ * @retval None
+ */
+void COMP_SwitchCmd(uint32_t COMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameter */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+
+ if (NewState != DISABLE)
+ {
+ /* Close SW1 switch */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMP1SW1);
+ }
+ else
+ {
+ /* Open SW1 switch */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMP1SW1);
+ }
+}
+
+/**
+ * @brief Return the output level (high or low) of the selected comparator.
+ * The output level depends on the selected polarity.
+ * If the polarity is not inverted:
+ * - Comparator output is low when the non-inverting input is at a lower
+ * voltage than the inverting input
+ * - Comparator output is high when the non-inverting input is at a higher
+ * voltage than the inverting input
+ * If the polarity is inverted:
+ * - Comparator output is high when the non-inverting input is at a lower
+ * voltage than the inverting input
+ * - Comparator output is low when the non-inverting input is at a higher
+ * voltage than the inverting input
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 1 to 7
+ * to select the COMP peripheral.
+ * @retval Returns the selected comparator output level: low or high.
+ *
+ */
+uint32_t COMP_GetOutputLevel(uint32_t COMP_Selection)
+{
+ uint32_t compout = 0x0;
+
+ /* Check the parameters */
+ assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
+
+ /* Check if selected comparator output is high */
+ if ((*(__IO uint32_t *) (COMP_BASE + COMP_Selection) & (COMP_CSR_COMPxOUT)) != 0)
+ {
+ compout = COMP_OutputLevel_High;
+ }
+ else
+ {
+ compout = COMP_OutputLevel_Low;
+ }
+
+ /* Return the comparator output level */
+ return (uint32_t)(compout);
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup COMP_Group2 Window mode control function
+ * @brief Window mode control function
+ *
+@verbatim
+ ===============================================================================
+ ##### Window mode control function #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Enables or disables the window mode.
+ * Window mode for comparators makes use of two comparators:
+ * COMP1 and COM2, COMP3 and COMP4, COMP5 and COMP6.
+ * In window mode, COMPx and COMPx-1 (where x can be 2, 4 or 6)
+ * non inverting inputs are connected together and only COMPx-1 non
+ * inverting input can be used.
+ * e.g When window mode enabled for COMP4, COMP3 non inverting input (PB14 or PD14)
+ * is to be used.
+ * @note If the COMPx is locked, ENABLE/DISABLE the window mode can't be performed.
+ * To unlock the configuration, perform a system reset.
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 2, 4 or 6
+ * to select the COMP peripheral.
+ * param NewState: new state of the window mode.
+ * This parameter can be ENABLE or DISABLE.
+ * When enbaled, COMPx and COMPx-1 non inverting inputs are connected together.
+ * When disabled, COMPx and COMPx-1 non inverting inputs are disconnected.
+ * @retval None
+ */
+void COMP_WindowCmd(uint32_t COMP_Selection, FunctionalState NewState)
+{
+ /* Check the parameters */
+ assert_param(IS_FUNCTIONAL_STATE(NewState));
+ assert_param(IS_COMP_WINDOW(COMP_Selection));
+
+ if (NewState != DISABLE)
+ {
+ /* Enable the window mode */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) COMP_CSR_COMPxWNDWEN;
+ }
+ else
+ {
+ /* Disable the window mode */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) &= (uint32_t)(~COMP_CSR_COMPxWNDWEN);
+ }
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup COMP_Group3 COMP configuration locking function
+ * @brief COMP1, COMP2,...COMP7 configuration locking function
+ * COMP1, COMP2,...COMP7 configuration can be locked each separately.
+ * Unlocking is performed by system reset.
+ *
+@verbatim
+ ===============================================================================
+ ##### Configuration Lock function #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Lock the selected comparator (COMP1/COMP2) configuration.
+ * @note Locking the configuration means that all control bits are read-only.
+ * To unlock the comparator configuration, perform a system reset.
+ * @param COMP_Selection: the selected comparator.
+ * This parameter can be COMP_Selection_COMPx where x can be 1 to 7
+ * to select the COMP peripheral.
+ * @retval None
+ */
+void COMP_LockConfig(uint32_t COMP_Selection)
+{
+ /* Check the parameter */
+ assert_param(IS_COMP_ALL_PERIPH(COMP_Selection));
+
+ /* Set the lock bit corresponding to selected comparator */
+ *(__IO uint32_t *) (COMP_BASE + COMP_Selection) |= (uint32_t) (COMP_CSR_COMPxLOCK);
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/