/** ****************************************************************************** * @file stm32l0xx_ll_comp.c * @author MCD Application Team * @brief COMP 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 "stm32l0xx_ll_comp.h" #ifdef USE_FULL_ASSERT #include "stm32_assert.h" #else #define assert_param(expr) ((void)0U) #endif /** @addtogroup STM32L0xx_LL_Driver * @{ */ #if defined (COMP1) || defined (COMP2) /** @addtogroup COMP_LL COMP * @{ */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /* Private macros ------------------------------------------------------------*/ /** @addtogroup COMP_LL_Private_Macros * @{ */ /* Check of parameters for configuration of COMP hierarchical scope: */ /* COMP instance. */ #define IS_LL_COMP_POWER_MODE(__POWER_MODE__) \ ( ((__POWER_MODE__) == LL_COMP_POWERMODE_MEDIUMSPEED) \ || ((__POWER_MODE__) == LL_COMP_POWERMODE_ULTRALOWPOWER) \ ) #if defined (STM32L011xx) || defined (STM32L021xx) #define IS_LL_COMP_INPUT_PLUS(__COMP_INSTANCE__, __INPUT_PLUS__) \ (((__COMP_INSTANCE__) == COMP1) \ ? ( \ (__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1 \ ) \ : \ ( \ ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO2) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO3) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO4) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO5) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO6) \ ) \ ) #else #define IS_LL_COMP_INPUT_PLUS(__COMP_INSTANCE__, __INPUT_PLUS__) \ (((__COMP_INSTANCE__) == COMP1) \ ? ( \ (__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1 \ ) \ : \ ( \ ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO2) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO3) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO4) \ || ((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO5) \ ) \ ) #endif /* Note: On this STM32 serie, comparator input minus parameters are */ /* the different depending on COMP instances. */ #define IS_LL_COMP_INPUT_MINUS(__COMP_INSTANCE__, __INPUT_MINUS__) \ (((__COMP_INSTANCE__) == COMP1) \ ? ( \ ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_VREFINT) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH1) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH2) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO1) \ ) \ : \ ( \ ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_1_4VREFINT) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_1_2VREFINT) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_3_4VREFINT) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_VREFINT) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH1) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_DAC1_CH2) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO1) \ || ((__INPUT_MINUS__) == LL_COMP_INPUT_MINUS_IO2) \ ) \ ) #define IS_LL_COMP_OUTPUT_POLARITY(__POLARITY__) \ ( ((__POLARITY__) == LL_COMP_OUTPUTPOL_NONINVERTED) \ || ((__POLARITY__) == LL_COMP_OUTPUTPOL_INVERTED) \ ) /** * @} */ /* Private function prototypes -----------------------------------------------*/ /* Exported functions --------------------------------------------------------*/ /** @addtogroup COMP_LL_Exported_Functions * @{ */ /** @addtogroup COMP_LL_EF_Init * @{ */ /** * @brief De-initialize registers of the selected COMP 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 COMPx COMP instance * @retval An ErrorStatus enumeration value: * - SUCCESS: COMP registers are de-initialized * - ERROR: COMP registers are not de-initialized */ ErrorStatus LL_COMP_DeInit(COMP_TypeDef *COMPx) { ErrorStatus status = SUCCESS; /* Check the parameters */ assert_param(IS_COMP_ALL_INSTANCE(COMPx)); /* Note: Hardware constraint (refer to description of this function): */ /* COMP instance must not be locked. */ if(LL_COMP_IsLocked(COMPx) == 0U) { if(COMPx == COMP1) { CLEAR_BIT(COMPx->CSR, ( COMP_CSR_COMP1EN | COMP_CSR_COMP1INNSEL | COMP_CSR_COMP1WM | COMP_CSR_COMP1LPTIM1IN1 | COMP_CSR_COMP1POLARITY | COMP_CSR_COMP1LOCK ) ); } else { CLEAR_BIT(COMPx->CSR, ( COMP_CSR_COMP2EN | COMP_CSR_COMP2SPEED | COMP_CSR_COMP2INNSEL | COMP_CSR_COMP2INPSEL | COMP_CSR_COMP2LPTIM1IN2 | COMP_CSR_COMP2LPTIM1IN1 | COMP_CSR_COMP2POLARITY | COMP_CSR_COMP2LOCK ) ); } } else { /* Comparator instance is locked: de-initialization by software is */ /* not possible. */ /* The only way to unlock the comparator is a device hardware reset. */ status = ERROR; } return status; } /** * @brief Initialize some features of COMP instance. * @note This function configures features of the selected COMP instance. * Some features are also available at scope COMP common instance * (common to several COMP instances). * Refer to functions having argument "COMPxy_COMMON" as parameter. * @param COMPx COMP instance * @param COMP_InitStruct Pointer to a @ref LL_COMP_InitTypeDef structure * @retval An ErrorStatus enumeration value: * - SUCCESS: COMP registers are initialized * - ERROR: COMP registers are not initialized */ ErrorStatus LL_COMP_Init(COMP_TypeDef *COMPx, LL_COMP_InitTypeDef *COMP_InitStruct) { ErrorStatus status = SUCCESS; /* Check the parameters */ assert_param(IS_COMP_ALL_INSTANCE(COMPx)); if(COMPx == COMP2) { assert_param(IS_LL_COMP_POWER_MODE(COMP_InitStruct->PowerMode)); assert_param(IS_LL_COMP_INPUT_PLUS(COMPx, COMP_InitStruct->InputPlus)); } assert_param(IS_LL_COMP_INPUT_MINUS(COMPx, COMP_InitStruct->InputMinus)); assert_param(IS_LL_COMP_OUTPUT_POLARITY(COMP_InitStruct->OutputPolarity)); /* Note: Hardware constraint (refer to description of this function) */ /* COMP instance must not be locked. */ if(LL_COMP_IsLocked(COMPx) == 0U) { /* Configuration of comparator instance : */ /* - PowerMode */ /* - InputPlus */ /* - InputMinus */ /* - OutputPolarity */ /* Note: Connection switch is applicable only to COMP instance COMP1, */ /* therefore is COMP2 is selected the equivalent bit is */ /* kept unmodified. */ if(COMPx == COMP1) { MODIFY_REG(COMPx->CSR, ( COMP_CSR_COMP1INNSEL | COMP_CSR_COMP1POLARITY ) , ( COMP_InitStruct->InputMinus | COMP_InitStruct->OutputPolarity ) ); } else { MODIFY_REG(COMPx->CSR, ( COMP_CSR_COMP2SPEED | COMP_CSR_COMP2INPSEL | COMP_CSR_COMP2INNSEL | COMP_CSR_COMP2POLARITY ) , ( COMP_InitStruct->PowerMode | COMP_InitStruct->InputPlus | COMP_InitStruct->InputMinus | COMP_InitStruct->OutputPolarity ) ); } } else { /* Initialization error: COMP instance is locked. */ status = ERROR; } return status; } /** * @brief Set each @ref LL_COMP_InitTypeDef field to default value. * @param COMP_InitStruct: pointer to a @ref LL_COMP_InitTypeDef structure * whose fields will be set to default values. * @retval None */ void LL_COMP_StructInit(LL_COMP_InitTypeDef *COMP_InitStruct) { /* Set COMP_InitStruct fields to default values */ COMP_InitStruct->PowerMode = LL_COMP_POWERMODE_MEDIUMSPEED; COMP_InitStruct->InputPlus = LL_COMP_INPUT_PLUS_IO1; COMP_InitStruct->InputMinus = LL_COMP_INPUT_MINUS_VREFINT; COMP_InitStruct->OutputPolarity = LL_COMP_OUTPUTPOL_NONINVERTED; } /** * @} */ /** * @} */ /** * @} */ #endif /* COMP1 || COMP2 */ /** * @} */ #endif /* USE_FULL_LL_DRIVER */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/