Initialization and de-initialization functions

Functions
ErrorStatus	LL_OPAMP_DeInit (OPAMP_TypeDef *OPAMPx)
	De-initialize registers of the selected OPAMP instance to their default reset values. More...
ErrorStatus	LL_OPAMP_Init (OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
	Initialize some features of OPAMP instance. More...
void	LL_OPAMP_StructInit (LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
	Set each LL_OPAMP_InitTypeDef field to default value. More...

Detailed Description

Function Documentation

LL_OPAMP_DeInit()

ErrorStatus LL_OPAMP_DeInit

(

OPAMP_TypeDef *

OPAMPx

)

De-initialize registers of the selected OPAMP instance to their default reset values.

Parameters

OPAMPx

OPAMP instance

Return values

An	ErrorStatus enumeration value: SUCCESS: OPAMP registers are de-initialized ERROR: OPAMP registers are not de-initialized

Definition at line 105 of file stm32l4xx_ll_opamp.c.

{
  ErrorStatus status = SUCCESS;

  /* Check the parameters */
  assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));

  LL_OPAMP_WriteReg(OPAMPx, CSR, 0x00000000U);

  return status;
}

LL_OPAMP_Init()

ErrorStatus LL_OPAMP_Init	(	OPAMP_TypeDef *	OPAMPx,
		LL_OPAMP_InitTypeDef *	OPAMP_InitStruct
	)

Initialize some features of OPAMP instance.

Note

This function reset bit of calibration mode to ensure to be in functional mode, in order to have OPAMP parameters (inputs selection, ...) set with the corresponding OPAMP mode to be effective.

This function configures features of the selected OPAMP instance. Some features are also available at scope OPAMP common instance (common to several OPAMP instances). Refer to functions having argument "OPAMPxy_COMMON" as parameter.

Parameters

OPAMPx	OPAMP instance
OPAMP_InitStruct	Pointer to a LL_OPAMP_InitTypeDef structure

Return values

An	ErrorStatus enumeration value: SUCCESS: OPAMP registers are initialized ERROR: OPAMP registers are not initialized

Definition at line 133 of file stm32l4xx_ll_opamp.c.

{
  /* Check the parameters */
  assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
  assert_param(IS_LL_OPAMP_POWER_MODE(OPAMP_InitStruct->PowerMode));
  assert_param(IS_LL_OPAMP_FUNCTIONAL_MODE(OPAMP_InitStruct->FunctionalMode));
  assert_param(IS_LL_OPAMP_INPUT_NONINVERTING(OPAMPx, OPAMP_InitStruct->InputNonInverting));

  /* Note: OPAMP inverting input can be used with OPAMP in mode standalone    */
  /*       or PGA with external capacitors for filtering circuit.             */
  /*       Otherwise (OPAMP in mode follower), OPAMP inverting input is       */
  /*       not used (not connected to GPIO pin).                              */
  if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
  {
    assert_param(IS_LL_OPAMP_INPUT_INVERTING(OPAMPx, OPAMP_InitStruct->InputInverting));
  }

  /* Configuration of OPAMP instance :                                        */
  /*  - PowerMode                                                             */
  /*  - Functional mode                                                       */
  /*  - Input non-inverting                                                   */
  /*  - Input inverting                                                       */
  /* Note: Bit OPAMP_CSR_CALON reset to ensure to be in functional mode.      */
  if(OPAMP_InitStruct->FunctionalMode != LL_OPAMP_MODE_FOLLOWER)
  {
    MODIFY_REG(OPAMPx->CSR,
                 OPAMP_CSR_OPALPM
               | OPAMP_CSR_OPAMODE
               | OPAMP_CSR_CALON
               | OPAMP_CSR_VMSEL
               | OPAMP_CSR_VPSEL
              ,
                 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
               | OPAMP_InitStruct->FunctionalMode
               | OPAMP_InitStruct->InputNonInverting
               | OPAMP_InitStruct->InputInverting
              );
  }
  else
  {
    MODIFY_REG(OPAMPx->CSR,
                 OPAMP_CSR_OPALPM
               | OPAMP_CSR_OPAMODE
               | OPAMP_CSR_CALON
               | OPAMP_CSR_VMSEL
               | OPAMP_CSR_VPSEL
              ,
                 (OPAMP_InitStruct->PowerMode & OPAMP_POWERMODE_CSR_BIT_MASK)
               | LL_OPAMP_MODE_FOLLOWER
               | OPAMP_InitStruct->InputNonInverting
               | LL_OPAMP_INPUT_INVERT_CONNECT_NO
              );
  }

  return SUCCESS;
}

LL_OPAMP_StructInit()

void LL_OPAMP_StructInit

(

LL_OPAMP_InitTypeDef *

OPAMP_InitStruct

)

Set each LL_OPAMP_InitTypeDef field to default value.

Parameters

OPAMP_InitStruct

pointer to a LL_OPAMP_InitTypeDef structure whose fields will be set to default values.

Return values

None

Definition at line 196 of file stm32l4xx_ll_opamp.c.

{
  /* Set OPAMP_InitStruct fields to default values */
  OPAMP_InitStruct->PowerMode         = LL_OPAMP_POWERMODE_NORMAL;
  OPAMP_InitStruct->FunctionalMode    = LL_OPAMP_MODE_FOLLOWER;
  OPAMP_InitStruct->InputNonInverting = LL_OPAMP_INPUT_NONINVERT_IO0;
  /* Note: Parameter discarded if OPAMP in functional mode follower,          */
  /*       set anyway to its default value.                                   */
  OPAMP_InitStruct->InputInverting    = LL_OPAMP_INPUT_INVERT_CONNECT_NO;
}