/**
* @brief Configure the feedback resistor gain.
* @note If the selected OPAMP is locked, gain configuration can't be performed.
* To unlock the configuration, perform a system reset.
* @param OPAMP_Selection: the selected OPAMP.
* This parameter can be OPAMP_Selection_OPAMPx where x can be 1 to 4
* to select the OPAMP peripheral.
* @param NewState: new state of the OPAMP peripheral.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void OPAMP_PGAConfig(uint32_t OPAMP_Selection, uint32_t OPAMP_PGAGain, uint32_t OPAMP_PGAConnect)
{
/* Check the parameters */
assert_param(IS_OPAMP_ALL_PERIPH(OPAMP_Selection));
assert_param(IS_OPAMP_PGAGAIN(OPAMP_PGAGain));
assert_param(IS_OPAMP_PGACONNECT(OPAMP_PGAConnect));
/* Reset the configuration bits */
*(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) &= (uint32_t)(~OPAMP_CSR_PGGAIN);
/* Set the new configuration */
*(__IO uint32_t *) (OPAMP_BASE + OPAMP_Selection) |= (uint32_t) (OPAMP_PGAGain | OPAMP_PGAConnect);
}
/**
* @brief Initializes the OPAMP according to the specified
* parameters in the OPAMP_InitTypeDef and create the associated handle.
* @note If the selected opamp is locked, initialization can't be performed.
* To unlock the configuration, perform a system reset.
* @param hopamp: OPAMP handle
* @retval HAL status
*/
HAL_StatusTypeDef HAL_OPAMP_Init(OPAMP_HandleTypeDef *hopamp)
{
HAL_StatusTypeDef status = HAL_OK;
/* Check the OPAMP handle allocation and lock status */
/* Init not allowed if calibration is ongoing */
if((hopamp == NULL) || (hopamp->State == HAL_OPAMP_STATE_BUSYLOCKED) \
|| (hopamp->State == HAL_OPAMP_STATE_CALIBBUSY))
{
return HAL_ERROR;
}
else
{
/* Check the parameter */
assert_param(IS_OPAMP_ALL_INSTANCE(hopamp->Instance));
/* Set OPAMP parameters */
assert_param(IS_OPAMP_FUNCTIONAL_NORMALMODE(hopamp->Init.Mode));
assert_param(IS_OPAMP_NONINVERTING_INPUT(hopamp->Init.NonInvertingInput));
if ((hopamp->Init.Mode) == OPAMP_STANDALONE_MODE)
{
assert_param(IS_OPAMP_INVERTING_INPUT(hopamp->Init.InvertingInput));
}
assert_param(IS_OPAMP_TIMERCONTROLLED_MUXMODE(hopamp->Init.TimerControlledMuxmode));
if ((hopamp->Init.TimerControlledMuxmode) == OPAMP_TIMERCONTROLLEDMUXMODE_ENABLE)
{
assert_param(IS_OPAMP_SEC_NONINVERTINGINPUT(hopamp->Init.NonInvertingInputSecondary));
if ((hopamp->Init.Mode) == OPAMP_STANDALONE_MODE)
{
assert_param(IS_OPAMP_SEC_INVERTINGINPUT(hopamp->Init.InvertingInputSecondary));
}
}
if ((hopamp->Init.Mode) == OPAMP_PGA_MODE)
{
assert_param(IS_OPAMP_PGACONNECT(hopamp->Init.PgaConnect));
assert_param(IS_OPAMP_PGA_GAIN(hopamp->Init.PgaGain));
}
assert_param(IS_OPAMP_TRIMMING(hopamp->Init.UserTrimming));
if ((hopamp->Init.UserTrimming) == OPAMP_TRIMMING_USER)
{
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueP));
assert_param(IS_OPAMP_TRIMMINGVALUE(hopamp->Init.TrimmingValueN));
}
/* Init SYSCFG and the low level hardware to access opamp */
__HAL_RCC_SYSCFG_CLK_ENABLE();
if(hopamp->State == HAL_OPAMP_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hopamp->Lock = HAL_UNLOCKED;
}
/* Call MSP init function */
HAL_OPAMP_MspInit(hopamp);
/* Set OPAMP parameters */
/* Set bits according to hopamp->hopamp->Init.Mode value */
/* Set bits according to hopamp->hopamp->Init.InvertingInput value */
/* Set bits according to hopamp->hopamp->Init.NonInvertingInput value */
/* Set bits according to hopamp->hopamp->Init.TimerControlledMuxmode value */
/* Set bits according to hopamp->hopamp->Init.InvertingInputSecondary value */
/* Set bits according to hopamp->hopamp->Init.NonInvertingInputSecondary value */
/* Set bits according to hopamp->hopamp->Init.PgaConnect value */
/* Set bits according to hopamp->hopamp->Init.PgaGain value */
/* Set bits according to hopamp->hopamp->Init.UserTrimming value */
/* Set bits according to hopamp->hopamp->Init.TrimmingValueP value */
/* Set bits according to hopamp->hopamp->Init.TrimmingValueN value */
/* check if OPAMP_PGA_MODE & in Follower mode */
/* - InvertingInput */
/* - InvertingInputSecondary */
/* are Not Applicable */
if ((hopamp->Init.Mode == OPAMP_PGA_MODE) || (hopamp->Init.Mode == OPAMP_FOLLOWER_MODE))
{
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_UPDATE_PARAMETERS_INIT_MASK, \
hopamp->Init.Mode | \
hopamp->Init.NonInvertingInput | \
hopamp->Init.TimerControlledMuxmode | \
hopamp->Init.NonInvertingInputSecondary | \
hopamp->Init.PgaConnect | \
hopamp->Init.PgaGain | \
hopamp->Init.UserTrimming | \
(hopamp->Init.TrimmingValueP << OPAMP_INPUT_NONINVERTING) | \
(hopamp->Init.TrimmingValueN << OPAMP_INPUT_INVERTING));
}
else /* OPAMP_STANDALONE_MODE */
{
MODIFY_REG(hopamp->Instance->CSR, OPAMP_CSR_UPDATE_PARAMETERS_INIT_MASK, \
hopamp->Init.Mode | \
hopamp->Init.InvertingInput | \
hopamp->Init.NonInvertingInput | \
hopamp->Init.TimerControlledMuxmode | \
hopamp->Init.InvertingInputSecondary | \
hopamp->Init.NonInvertingInputSecondary | \
hopamp->Init.PgaConnect | \
hopamp->Init.PgaGain | \
hopamp->Init.UserTrimming | \
(hopamp->Init.TrimmingValueP << OPAMP_INPUT_NONINVERTING) | \
(hopamp->Init.TrimmingValueN << OPAMP_INPUT_INVERTING));
}
/* Update the OPAMP state*/
if (hopamp->State == HAL_OPAMP_STATE_RESET)
{
/* From RESET state to READY State */
hopamp->State = HAL_OPAMP_STATE_READY;
}
/* else: remain in READY or BUSY state (no update) */
return status;
}
}
