/**
* @brief 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.
* @param OPAMPx OPAMP instance
* @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
* @retval An ErrorStatus enumeration value:
* - SUCCESS: OPAMP registers are initialized
* - ERROR: OPAMP registers are not initialized
*/
ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
{
ErrorStatus status = SUCCESS;
/* Check the parameters */
assert_param(IS_OPAMP_ALL_INSTANCE(OPAMPx));
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));
}
/* Note: Hardware constraint (refer to description of this function): */
/* OPAMP instance must not be locked. */
if(LL_OPAMP_IsLocked(OPAMPx) == 0U)
{
/* Configuration of OPAMP instance : */
/* - 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_CALON
| OPAMP_CSR_VMSEL
| OPAMP_CSR_VPSEL
,
OPAMP_InitStruct->FunctionalMode
| OPAMP_InitStruct->InputNonInverting
| OPAMP_InitStruct->InputInverting
);
}
else
{
MODIFY_REG(OPAMPx->CSR,
OPAMP_CSR_CALON
| OPAMP_CSR_VMSEL
| OPAMP_CSR_VPSEL
,
LL_OPAMP_MODE_FOLLOWER
| OPAMP_InitStruct->InputNonInverting
);
}
}
else
{
/* Initialization error: OPAMP instance is locked. */
status = ERROR;
}
return status;
}
/**
* @brief 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.
* @note 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.
* @param OPAMPx OPAMP instance
* @param OPAMP_InitStruct Pointer to a @ref LL_OPAMP_InitTypeDef structure
* @retval An ErrorStatus enumeration value:
* - SUCCESS: OPAMP registers are initialized
* - ERROR: OPAMP registers are not initialized
*/
ErrorStatus LL_OPAMP_Init(OPAMP_TypeDef *OPAMPx, LL_OPAMP_InitTypeDef *OPAMP_InitStruct)
{
/* 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;
}
