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🐛 MKS TinyBee - 2.5V ADC Vref (#23903)

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John Robertson 2022-03-17 19:35:33 +00:00 committed by Scott Lahteine
parent 2558b323e8
commit 2f2a999368
2 changed files with 10 additions and 1 deletions
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6
Marlin/src/HAL/ESP32/HAL.cpp
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@ -229,11 +229,15 @@ void MarlinHAL::adc_init() {
}
}
#ifndef ADC_REFERENCE_VOLTAGE
#define ADC_REFERENCE_VOLTAGE 3.3
#endif
void MarlinHAL::adc_start(const pin_t pin) {
const adc1_channel_t chan = get_channel(pin);
uint32_t mv;
esp_adc_cal_get_voltage((adc_channel_t)chan, &characteristics[attenuations[chan]], &mv);
adc_result = mv * 1023.0 / 3300.0;
adc_result = mv * 1023.0f / float(ADC_REFERENCE_VOLTAGE) / 1000.0f;
// Change the attenuation level based on the new reading
adc_atten_t atten;

5
Marlin/src/pins/esp32/pins_MKS_TINYBEE.h
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@ -113,6 +113,11 @@
//#define E0_AUTO_FAN_PIN 148 // need to update Configuration_adv.h @section extruder
//#define E1_AUTO_FAN_PIN 149 // need to update Configuration_adv.h @section extruder
//
// ADC Reference Voltage
//
#define ADC_REFERENCE_VOLTAGE 2.5 // 2.5V reference VDDA
//
// MicroSD card
//