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[SAMD51] Activate ADCs oversampled 12bits (#15874)

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This commit is contained in:
Giuliano Zaro 2019-11-13 03:59:17 +01:00 committed by Scott Lahteine
parent e110f5abce
commit bb93ea1be4
2 changed files with 5 additions and 2 deletions
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4
Marlin/src/HAL/HAL_SAMD51/HAL.cpp
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@ -442,9 +442,11 @@ void HAL_adc_init() {
// Preloaded data (fixed for all ADC instances hence not loaded by DMA)
adc->REFCTRL.bit.REFSEL = ADC_REFCTRL_REFSEL_AREFA_Val; // VRefA pin
SYNC(adc->SYNCBUSY.bit.REFCTRL);
adc->CTRLB.bit.RESSEL = ADC_CTRLB_RESSEL_10BIT_Val;
adc->CTRLB.bit.RESSEL = ADC_CTRLB_RESSEL_12BIT_Val;
SYNC(adc->SYNCBUSY.bit.CTRLB);
adc->SAMPCTRL.bit.SAMPLEN = (6 - 1); // Sampling clocks
adc->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_16 | ADC_AVGCTRL_ADJRES(4); // 16 Accumulated conversions and shift 4 to get oversampled 12 bits result
SYNC(adc->SYNCBUSY.bit.AVGCTRL);
// Registers loaded by DMA
adc->DSEQCTRL.bit.INPUTCTRL = true;

3
Marlin/src/HAL/HAL_SAMD51/HAL.h
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@ -109,8 +109,9 @@ extern uint16_t HAL_adc_result; // result of last ADC conversion
void HAL_adc_init();
#define HAL_ADC_FILTERED // Disable oversampling done in Marlin as ADC values already filtered in HAL
#define HAL_ADC_RESOLUTION 12
#define HAL_START_ADC(pin) HAL_adc_start_conversion(pin)
#define HAL_ADC_RESOLUTION 10
#define HAL_READ_ADC() HAL_adc_result
#define HAL_ADC_READY() true