Configuration of comparator inputs

Functions
__STATIC_INLINE void	LL_COMP_ConfigInputs (COMP_TypeDef *COMPx, uint32_t InputMinus, uint32_t InputPlus)
	Set comparator inputs minus (inverting) and plus (non-inverting). More...
__STATIC_INLINE void	LL_COMP_SetInputPlus (COMP_TypeDef *COMPx, uint32_t InputPlus)
	Set comparator input plus (non-inverting). More...
__STATIC_INLINE uint32_t	LL_COMP_GetInputPlus (COMP_TypeDef *COMPx)
	Get comparator input plus (non-inverting). More...
__STATIC_INLINE void	LL_COMP_SetInputMinus (COMP_TypeDef *COMPx, uint32_t InputMinus)
	Set comparator input minus (inverting). More...
__STATIC_INLINE uint32_t	LL_COMP_GetInputMinus (COMP_TypeDef *COMPx)
	Get comparator input minus (inverting). More...
__STATIC_INLINE void	LL_COMP_SetInputHysteresis (COMP_TypeDef *COMPx, uint32_t InputHysteresis)
	Set comparator instance hysteresis mode of the input minus (inverting input). CSR HYST LL_COMP_SetInputHysteresis. More...
__STATIC_INLINE uint32_t	LL_COMP_GetInputHysteresis (COMP_TypeDef *COMPx)
	Get comparator instance hysteresis mode of the minus (inverting) input. CSR HYST LL_COMP_GetInputHysteresis. More...

Detailed Description

Function Documentation

LL_COMP_ConfigInputs()

__STATIC_INLINE void LL_COMP_ConfigInputs	(	COMP_TypeDef *	COMPx,
		uint32_t	InputMinus,
		uint32_t	InputPlus
	)

Set comparator inputs minus (inverting) and plus (non-inverting).

Note

In case of comparator input selected to be connected to IO: GPIO pins are specific to each comparator instance. Refer to description of parameters or to reference manual.

On this STM32 serie, scaler bridge is configurable: to optimize power consumption, this function enables the voltage scaler bridge only when required (when selecting comparator input based on VrefInt: VrefInt or subdivision of VrefInt).

• For scaler bridge power consumption values, refer to device datasheet, parameter "IDDA(SCALER)".
• Voltage scaler requires a delay for voltage stabilization. Refer to device datasheet, parameter "tSTART_SCALER".
• Scaler bridge is common for all comparator instances, therefore if at least one of the comparator instance is requiring the scaler bridge, it remains enabled. CSR INMSEL LL_COMP_ConfigInputs
  CSR INPSEL LL_COMP_ConfigInputs
  CSR BRGEN LL_COMP_ConfigInputs
  CSR SCALEN LL_COMP_ConfigInputs

Parameters

COMPx	Comparator instance
InputMinus	This parameter can be one of the following values: LL_COMP_INPUT_MINUS_1_4VREFINT LL_COMP_INPUT_MINUS_1_2VREFINT LL_COMP_INPUT_MINUS_3_4VREFINT LL_COMP_INPUT_MINUS_VREFINT LL_COMP_INPUT_MINUS_DAC1_CH1 LL_COMP_INPUT_MINUS_DAC1_CH2 (*) LL_COMP_INPUT_MINUS_IO1 LL_COMP_INPUT_MINUS_IO2 LL_COMP_INPUT_MINUS_IO3 (*) LL_COMP_INPUT_MINUS_IO4 (*) LL_COMP_INPUT_MINUS_IO5 (*) (*) Parameter not available on all devices.
InputPlus	This parameter can be one of the following values: LL_COMP_INPUT_PLUS_IO1 LL_COMP_INPUT_PLUS_IO2 LL_COMP_INPUT_PLUS_IO3 (*) (*) Parameter not available on all devices.

Return values

None

Definition at line 463 of file stm32l4xx_ll_comp.h.

{
#if defined(COMP_CSR_INMESEL_1)
  MODIFY_REG(COMPx->CSR,
             COMP_CSR_INMESEL | COMP_CSR_INMSEL | COMP_CSR_INPSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN,
             InputMinus | InputPlus);
#else
  MODIFY_REG(COMPx->CSR,
             COMP_CSR_INMSEL | COMP_CSR_INPSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN,
             InputMinus | InputPlus);
#endif
}

LL_COMP_GetInputHysteresis()

__STATIC_INLINE uint32_t LL_COMP_GetInputHysteresis

(

COMP_TypeDef *

COMPx

)

Get comparator instance hysteresis mode of the minus (inverting) input. CSR HYST LL_COMP_GetInputHysteresis.

Parameters

COMPx

Comparator instance

Return values

Returned

value can be one of the following values: LL_COMP_HYSTERESIS_NONE LL_COMP_HYSTERESIS_LOW LL_COMP_HYSTERESIS_MEDIUM LL_COMP_HYSTERESIS_HIGH

Definition at line 620 of file stm32l4xx_ll_comp.h.

{
  return (uint32_t)(READ_BIT(COMPx->CSR, COMP_CSR_HYST));
}

LL_COMP_GetInputMinus()

__STATIC_INLINE uint32_t LL_COMP_GetInputMinus

(

COMP_TypeDef *

COMPx

)

Get comparator input minus (inverting).

Note

In case of comparator input selected to be connected to IO: GPIO pins are specific to each comparator instance. Refer to description of parameters or to reference manual. CSR INMSEL LL_COMP_GetInputMinus
CSR BRGEN LL_COMP_GetInputMinus
CSR SCALEN LL_COMP_GetInputMinus

Parameters

COMPx

Comparator instance

Return values

Returned

value can be one of the following values: LL_COMP_INPUT_MINUS_1_4VREFINT LL_COMP_INPUT_MINUS_1_2VREFINT LL_COMP_INPUT_MINUS_3_4VREFINT LL_COMP_INPUT_MINUS_VREFINT LL_COMP_INPUT_MINUS_DAC1_CH1 LL_COMP_INPUT_MINUS_DAC1_CH2 (*) LL_COMP_INPUT_MINUS_IO1 LL_COMP_INPUT_MINUS_IO2 LL_COMP_INPUT_MINUS_IO3 (*) LL_COMP_INPUT_MINUS_IO4 (*) LL_COMP_INPUT_MINUS_IO5 (*) (*) Parameter not available on all devices.

Definition at line 585 of file stm32l4xx_ll_comp.h.

{
#if defined(COMP_CSR_INMESEL_1)
  return (uint32_t)(READ_BIT(COMPx->CSR, COMP_CSR_INMESEL | COMP_CSR_INMSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN));
#else
  return (uint32_t)(READ_BIT(COMPx->CSR, COMP_CSR_INMSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN));
#endif
}

LL_COMP_GetInputPlus()

__STATIC_INLINE uint32_t LL_COMP_GetInputPlus

(

COMP_TypeDef *

COMPx

)

Get comparator input plus (non-inverting).

Note

In case of comparator input selected to be connected to IO: GPIO pins are specific to each comparator instance. Refer to description of parameters or to reference manual. CSR INPSEL LL_COMP_GetInputPlus

Parameters

COMPx

Comparator instance

Return values

Returned

value can be one of the following values: LL_COMP_INPUT_PLUS_IO1 LL_COMP_INPUT_PLUS_IO2 LL_COMP_INPUT_PLUS_IO3 (*) (*) Parameter not available on all devices.

Definition at line 510 of file stm32l4xx_ll_comp.h.

{
  return (uint32_t)(READ_BIT(COMPx->CSR, COMP_CSR_INPSEL));
}

LL_COMP_SetInputHysteresis()

__STATIC_INLINE void LL_COMP_SetInputHysteresis	(	COMP_TypeDef *	COMPx,
		uint32_t	InputHysteresis
	)

Set comparator instance hysteresis mode of the input minus (inverting input). CSR HYST LL_COMP_SetInputHysteresis.

Parameters

COMPx	Comparator instance
InputHysteresis	This parameter can be one of the following values: LL_COMP_HYSTERESIS_NONE LL_COMP_HYSTERESIS_LOW LL_COMP_HYSTERESIS_MEDIUM LL_COMP_HYSTERESIS_HIGH

Return values

None

Definition at line 605 of file stm32l4xx_ll_comp.h.

{
  MODIFY_REG(COMPx->CSR, COMP_CSR_HYST, InputHysteresis);
}

LL_COMP_SetInputMinus()

__STATIC_INLINE void LL_COMP_SetInputMinus	(	COMP_TypeDef *	COMPx,
		uint32_t	InputMinus
	)

Set comparator input minus (inverting).

Note

In case of comparator input selected to be connected to IO: GPIO pins are specific to each comparator instance. Refer to description of parameters or to reference manual.

On this STM32 serie, scaler bridge is configurable: to optimize power consumption, this function enables the voltage scaler bridge only when required (when selecting comparator input based on VrefInt: VrefInt or subdivision of VrefInt).

• For scaler bridge power consumption values, refer to device datasheet, parameter "IDDA(SCALER)".
• Voltage scaler requires a delay for voltage stabilization. Refer to device datasheet, parameter "tSTART_SCALER".
• Scaler bridge is common for all comparator instances, therefore if at least one of the comparator instance is requiring the scaler bridge, it remains enabled. CSR INMSEL LL_COMP_SetInputMinus
  CSR BRGEN LL_COMP_SetInputMinus
  CSR SCALEN LL_COMP_SetInputMinus

Parameters

COMPx

Comparator instance

InputMinus

This parameter can be one of the following values: LL_COMP_INPUT_MINUS_1_4VREFINT LL_COMP_INPUT_MINUS_1_2VREFINT LL_COMP_INPUT_MINUS_3_4VREFINT LL_COMP_INPUT_MINUS_VREFINT LL_COMP_INPUT_MINUS_DAC1_CH1 LL_COMP_INPUT_MINUS_DAC1_CH2 (*) LL_COMP_INPUT_MINUS_IO1 LL_COMP_INPUT_MINUS_IO2 LL_COMP_INPUT_MINUS_IO3 (*) LL_COMP_INPUT_MINUS_IO4 (*) LL_COMP_INPUT_MINUS_IO5 (*) (*) Parameter not available on all devices.

Return values

None

Definition at line 552 of file stm32l4xx_ll_comp.h.

{
#if defined(COMP_CSR_INMESEL_1)
  MODIFY_REG(COMPx->CSR, COMP_CSR_INMESEL | COMP_CSR_INMSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN, InputMinus);
#else
  MODIFY_REG(COMPx->CSR, COMP_CSR_INMSEL | COMP_CSR_SCALEN | COMP_CSR_BRGEN, InputMinus);
#endif
}

LL_COMP_SetInputPlus()

__STATIC_INLINE void LL_COMP_SetInputPlus	(	COMP_TypeDef *	COMPx,
		uint32_t	InputPlus
	)

Set comparator input plus (non-inverting).

Note

In case of comparator input selected to be connected to IO: GPIO pins are specific to each comparator instance. Refer to description of parameters or to reference manual. CSR INPSEL LL_COMP_SetInputPlus

Parameters

COMPx	Comparator instance
InputPlus	This parameter can be one of the following values: LL_COMP_INPUT_PLUS_IO1 LL_COMP_INPUT_PLUS_IO2 LL_COMP_INPUT_PLUS_IO3 (*) (*) Parameter not available on all devices.

Return values

None

Definition at line 491 of file stm32l4xx_ll_comp.h.

{
  MODIFY_REG(COMPx->CSR, COMP_CSR_INPSEL, InputPlus);
}