/**
******************************************************************************
* @file stm32f0xx_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 "stm32f0xx_ll_comp.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32F0xx_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_HIGHSPEED) \
|| ((__POWER_MODE__) == LL_COMP_POWERMODE_MEDIUMSPEED) \
|| ((__POWER_MODE__) == LL_COMP_POWERMODE_LOWPOWER) \
|| ((__POWER_MODE__) == LL_COMP_POWERMODE_ULTRALOWPOWER) \
)
/* Note: On this STM32 serie, comparator input plus parameters are */
/* the different depending on COMP instances. */
#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_DAC1_CH1) \
) \
: \
( \
((__INPUT_PLUS__) == LL_COMP_INPUT_PLUS_IO1) \
) \
)
/* Note: On this STM32 serie, comparator input minus parameters are */
/* the same on all COMP instances. */
/* However, comparator instance kept as macro parameter for */
/* compatibility with other STM32 families. */
#define IS_LL_COMP_INPUT_MINUS(__COMP_INSTANCE__, __INPUT_MINUS__) \
( ((__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) \
)
#define IS_LL_COMP_INPUT_HYSTERESIS(__INPUT_HYSTERESIS__) \
( ((__INPUT_HYSTERESIS__) == LL_COMP_HYSTERESIS_NONE) \
|| ((__INPUT_HYSTERESIS__) == LL_COMP_HYSTERESIS_LOW) \
|| ((__INPUT_HYSTERESIS__) == LL_COMP_HYSTERESIS_MEDIUM) \
|| ((__INPUT_HYSTERESIS__) == LL_COMP_HYSTERESIS_HIGH) \
)
#define IS_LL_COMP_OUTPUT_SELECTION(__OUTPUT_SELECTION__) \
( ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_NONE) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM1_BKIN) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM1_IC1) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM1_OCCLR) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM2_IC4) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM2_OCCLR) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM3_IC1) \
|| ((__OUTPUT_SELECTION__) == LL_COMP_OUTPUT_TIM3_OCCLR) \
)
#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)
{
/* Note: Connection switch is applicable only to COMP instance COMP1, */
/* therefore is COMP2 is selected the equivalent bit is */
/* kept unmodified. */
if(COMPx == COMP1)
{
CLEAR_BIT(COMP->CSR,
( COMP_CSR_COMP1MODE
| COMP_CSR_COMP1INSEL
| COMP_CSR_COMP1SW1
| COMP_CSR_COMP1OUTSEL
| COMP_CSR_COMP1HYST
| COMP_CSR_COMP1POL
| COMP_CSR_COMP1EN
) << __COMP_BITOFFSET_INSTANCE(COMPx)
);
}
else
{
CLEAR_BIT(COMP->CSR,
( COMP_CSR_COMP1MODE
| COMP_CSR_COMP1INSEL
| COMP_CSR_COMP1OUTSEL
| COMP_CSR_COMP1HYST
| COMP_CSR_COMP1POL
| COMP_CSR_COMP1EN
) << __COMP_BITOFFSET_INSTANCE(COMPx)
);
}
}
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));
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_INPUT_HYSTERESIS(COMP_InitStruct->InputHysteresis));
assert_param(IS_LL_COMP_OUTPUT_SELECTION(COMP_InitStruct->OutputSelection));
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 */
/* - InputHysteresis */
/* - OutputSelection */
/* - 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(COMP->CSR,
( COMP_CSR_COMP1MODE
| COMP_CSR_COMP1INSEL
| COMP_CSR_COMP1SW1
| COMP_CSR_COMP1OUTSEL
| COMP_CSR_COMP1HYST
| COMP_CSR_COMP1POL
) << __COMP_BITOFFSET_INSTANCE(COMPx)
,
( COMP_InitStruct->PowerMode
| COMP_InitStruct->InputPlus
| COMP_InitStruct->InputMinus
| COMP_InitStruct->InputHysteresis
| COMP_InitStruct->OutputSelection
| COMP_InitStruct->OutputPolarity
) << __COMP_BITOFFSET_INSTANCE(COMPx)
);
}
else
{
MODIFY_REG(COMP->CSR,
( COMP_CSR_COMP1MODE
| COMP_CSR_COMP1INSEL
| COMP_CSR_COMP1OUTSEL
| COMP_CSR_COMP1HYST
| COMP_CSR_COMP1POL
) << __COMP_BITOFFSET_INSTANCE(COMPx)
,
( COMP_InitStruct->PowerMode
| COMP_InitStruct->InputPlus
| COMP_InitStruct->InputMinus
| COMP_InitStruct->InputHysteresis
| COMP_InitStruct->OutputSelection
| COMP_InitStruct->OutputPolarity
) << __COMP_BITOFFSET_INSTANCE(COMPx)
);
}
}
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_ULTRALOWPOWER;
COMP_InitStruct->InputPlus = LL_COMP_INPUT_PLUS_IO1;
COMP_InitStruct->InputMinus = LL_COMP_INPUT_MINUS_VREFINT;
COMP_InitStruct->InputHysteresis = LL_COMP_HYSTERESIS_NONE;
COMP_InitStruct->OutputSelection = LL_COMP_OUTPUT_NONE;
COMP_InitStruct->OutputPolarity = LL_COMP_OUTPUTPOL_NONINVERTED;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* COMP1 || COMP2 */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/