| /** |
| ****************************************************************************** |
| * @file stm32l0xx_ll_comp.c |
| * @author MCD Application Team |
| * @brief COMP LL module driver |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© Copyright(c) 2016 STMicroelectronics. |
| * All rights reserved.</center></h2> |
| * |
| * This software component is licensed by ST under BSD 3-Clause license, |
| * the "License"; You may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at: |
| * opensource.org/licenses/BSD-3-Clause |
| * |
| ****************************************************************************** |
| */ |
| #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****/ |
