From 2f2a999368f22f2c6b3105ab481987c2025bc50e Mon Sep 17 00:00:00 2001 From: John Robertson Date: Thu, 17 Mar 2022 19:35:33 +0000 Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20MKS=20TinyBee=20-=202.5V=20ADC?= =?UTF-8?q?=20Vref=20(#23903)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- Marlin/src/HAL/ESP32/HAL.cpp | 6 +++++- Marlin/src/pins/esp32/pins_MKS_TINYBEE.h | 5 +++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/Marlin/src/HAL/ESP32/HAL.cpp b/Marlin/src/HAL/ESP32/HAL.cpp index 4000dcc908..c1a44a3dea 100644 --- a/Marlin/src/HAL/ESP32/HAL.cpp +++ b/Marlin/src/HAL/ESP32/HAL.cpp @@ -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; diff --git a/Marlin/src/pins/esp32/pins_MKS_TINYBEE.h b/Marlin/src/pins/esp32/pins_MKS_TINYBEE.h index 122dad2146..68b8ed4ac8 100644 --- a/Marlin/src/pins/esp32/pins_MKS_TINYBEE.h +++ b/Marlin/src/pins/esp32/pins_MKS_TINYBEE.h @@ -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 //