COMP

COMP driver modules. More...

Modules
	COMP_Exported_Constants
	COMP_Private_Functions

Data Structures
struct	COMP_InitTypeDef
	COMP Init structure definition. More...

Macros
#define	COMP_CSR_CLEAR_MASK   ((uint32_t)0x00003FFE)

Functions
void	COMP_DeInit (void)
	Deinitializes COMP peripheral registers to their default reset values. More...
void	COMP_Init (uint32_t COMP_Selection, COMP_InitTypeDef *COMP_InitStruct)
	Initializes the COMP peripheral according to the specified parameters in COMP_InitStruct. More...
void	COMP_StructInit (COMP_InitTypeDef *COMP_InitStruct)
	Fills each COMP_InitStruct member with its default value. More...
void	COMP_Cmd (uint32_t COMP_Selection, FunctionalState NewState)
	Enable or disable the COMP peripheral. More...
void	COMP_SwitchCmd (FunctionalState NewState)
	Close or Open the SW1 switch. More...
uint32_t	COMP_GetOutputLevel (uint32_t COMP_Selection)
	Return the output level (high or low) of the selected comparator. More...
void	COMP_WindowCmd (FunctionalState NewState)
	Enables or disables the window mode. More...
void	COMP_LockConfig (uint32_t COMP_Selection)
	Lock the selected comparator (COMP1/COMP2) configuration. More...

Detailed Description

COMP driver modules.

Function Documentation

void COMP_Cmd	(	uint32_t	COMP_Selection,
		FunctionalState	NewState
	)

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.

Parameters

COMP_Selection,:	the selected comparator. This parameter can be one of the following values: COMP_Selection_COMP1: COMP1 selected COMP_Selection_COMP2: COMP2 selected
NewState,:	new state of the COMP peripheral. This parameter can be: ENABLE or DISABLE.

Note

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.

Return values

None

void COMP_DeInit

(

void

)

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.

Parameters

None

Return values

None

< Set COMP_CSR register to reset value

uint32_t COMP_GetOutputLevel

(

uint32_t

COMP_Selection

)

Return the output level (high or low) of the selected comparator.

Note

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

Parameters

COMP_Selection,:

the selected comparator. This parameter can be one of the following values: COMP_Selection_COMP1: COMP1 selected COMP_Selection_COMP2: COMP2 selected

Return values

Returns

the selected comparator output level: low or high.

void COMP_Init	(	uint32_t	COMP_Selection,
		COMP_InitTypeDef *	COMP_InitStruct
	)

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.

By default, PA1 is selected as COMP1 non inverting input. To use PA4 as COMP1 non inverting input call COMP_SwitchCmd() after COMP_Init()

Parameters

COMP_Selection,:	the selected comparator. This parameter can be one of the following values: COMP_Selection_COMP1: COMP1 selected COMP_Selection_COMP2: COMP2 selected
COMP_InitStruct,:	pointer to an COMP_InitTypeDef structure that contains the configuration information for the specified COMP peripheral.

Return values

None

< Get the COMP_CSR register value

< Clear the COMP1SW1, COMPx_IN_SEL, COMPx_OUT_TIM_SEL, COMPx_POL, COMPx_HYST and COMPx_PWR_MODE bits

< Configure COMP: inverting input, output redirection, hysteresis value and power mode

< Set COMPxINSEL bits according to COMP_InitStruct->COMP_InvertingInput 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

< Write to COMP_CSR register

void COMP_LockConfig

(

uint32_t

COMP_Selection

)

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.

Parameters

COMP_Selection,:

selects the comparator to be locked This parameter can be a value of the following values: COMP_Selection_COMP1: COMP1 configuration is locked. COMP_Selection_COMP2: COMP2 configuration is locked.

Return values

None

void COMP_StructInit

(

COMP_InitTypeDef *

COMP_InitStruct

)

Fills each COMP_InitStruct member with its default value.

Parameters

COMP_InitStruct,:

pointer to an COMP_InitTypeDef structure which will be initialized.

Return values

None

void COMP_SwitchCmd

(

FunctionalState

NewState

)

Close or Open the SW1 switch.

Note

This switch is solely intended to redirect signals onto high impedance input, such as COMP1 non-inverting input (highly resistive switch)

Parameters

NewState,:

New state of the analog switch. This parameter can be: ENABLE or DISABLE.

Note

When enabled, the SW1 is closed; PA1 is connected to PA4

When disabled, the SW1 switch is open; PA1 is disconnected from PA4

Return values

None

void COMP_WindowCmd

(

FunctionalState

NewState

)

Enables or disables the window mode.

Note

In window mode, COMP1 and COMP2 non inverting inputs are connected together and only COMP1 non inverting input (PA1) can be used.

Parameters

NewState,:

new state of the window mode. This parameter can be : ENABLE: COMP1 and COMP2 non inverting inputs are connected together. DISABLE: OMP1 and COMP2 non inverting inputs are disconnected.

Return values

None