/***************************************************************************//**
* @brief
* Reset ADC to same state as after a HW reset.
*
* @note
* The ROUTE register is NOT reset by this function, in order to allow for
* centralized setup of this feature.
*
* @param[in] adc
* Pointer to ADC peripheral register block.
******************************************************************************/
void ADC_Reset(ADC_TypeDef *adc)
{
/* Stop conversions, before resetting other registers. */
adc->CMD = ADC_CMD_SINGLESTOP | ADC_CMD_SCANSTOP;
adc->SINGLECTRL = _ADC_SINGLECTRL_RESETVALUE;
adc->SCANCTRL = _ADC_SCANCTRL_RESETVALUE;
adc->CTRL = _ADC_CTRL_RESETVALUE;
adc->IEN = _ADC_IEN_RESETVALUE;
adc->IFC = _ADC_IFC_MASK;
adc->BIASPROG = _ADC_BIASPROG_RESETVALUE;
/* Load calibration values for the 1V25 internal reference. */
ADC_CalibrateLoadSingle(adc, adcRef1V25);
ADC_CalibrateLoadScan(adc, adcRef1V25);
/* Do not reset route register, setting should be done independently */
}
/***************************************************************************//**
* @brief
* Initialize single ADC sample conversion.
*
* @details
* Please refer to ADC_StartSingle() for starting single conversion.
*
* When selecting an external reference, the gain and offset calibration
* must be set explicitly (CAL register). For other references, the
* calibration is updated with values defined during manufacturing.
*
* @note
* This function will stop any ongoing single conversion.
*
* @param[in] adc
* Pointer to ADC peripheral register block.
*
* @param[in] init
* Pointer to ADC initialization structure.
******************************************************************************/
void ADC_InitSingle(ADC_TypeDef *adc, const ADC_InitSingle_TypeDef *init)
{
uint32_t tmp;
EFM_ASSERT(ADC_REF_VALID(adc));
/* Make sure single conversion is not in progress */
adc->CMD = ADC_CMD_SINGLESTOP;
/* Load proper calibration data depending on selected reference */
ADC_CalibrateLoadSingle(adc, init->reference);
tmp = ((uint32_t)(init->prsSel) << _ADC_SINGLECTRL_PRSSEL_SHIFT) |
((uint32_t)(init->acqTime) << _ADC_SINGLECTRL_AT_SHIFT) |
((uint32_t)(init->reference) << _ADC_SINGLECTRL_REF_SHIFT) |
((uint32_t)(init->input) << _ADC_SINGLECTRL_INPUTSEL_SHIFT) |
((uint32_t)(init->resolution) << _ADC_SINGLECTRL_RES_SHIFT);
if (init->prsEnable)
{
tmp |= ADC_SINGLECTRL_PRSEN;
}
if (init->leftAdjust)
{
tmp |= ADC_SINGLECTRL_ADJ_LEFT;
}
if (init->diff)
{
tmp |= ADC_SINGLECTRL_DIFF;
}
if (init->rep)
{
tmp |= ADC_SINGLECTRL_REP;
}
adc->SINGLECTRL = tmp;
}
