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71 lines
1.9 KiB
71 lines
1.9 KiB
#pragma once
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#include <Arduino.h>
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#include <helpers/RefCountedDigitalPin.h>
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#include <helpers/ESP32Board.h>
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// built-ins
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#ifndef PIN_VBAT_READ // set in platformio.ini for boards like Heltec Wireless Paper (20)
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#define PIN_VBAT_READ 1
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#endif
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#ifndef PIN_ADC_CTRL // set in platformio.ini for Heltec Wireless Tracker (2)
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#define PIN_ADC_CTRL 37
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#endif
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#ifndef ADC_MULTIPLIER //default ADC multiplier
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#define ADC_MULTIPLIER 5.42
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#endif
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#define PIN_ADC_CTRL_ACTIVE LOW
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#define PIN_ADC_CTRL_INACTIVE HIGH
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class HeltecV3Board : public ESP32Board {
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private:
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bool adc_active_state;
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public:
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RefCountedDigitalPin periph_power;
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HeltecV3Board() : periph_power(PIN_VEXT_EN) { }
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void begin() {
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ESP32Board::begin();
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// Auto-detect correct ADC_CTRL pin polarity (different for boards >3.2)
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pinMode(PIN_ADC_CTRL, INPUT);
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adc_active_state = !digitalRead(PIN_ADC_CTRL);
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pinMode(PIN_ADC_CTRL, OUTPUT);
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digitalWrite(PIN_ADC_CTRL, !adc_active_state); // Initially inactive
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periph_power.begin();
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esp_reset_reason_t reason = esp_reset_reason();
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if (reason == ESP_RST_DEEPSLEEP) {
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long wakeup_source = esp_sleep_get_ext1_wakeup_status();
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if (wakeup_source & (1 << P_LORA_DIO_1)) { // received a LoRa packet (while in deep sleep)
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startup_reason = BD_STARTUP_RX_PACKET;
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}
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rtc_gpio_hold_dis((gpio_num_t)P_LORA_NSS);
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rtc_gpio_deinit((gpio_num_t)P_LORA_DIO_1);
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}
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}
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uint16_t getBattMilliVolts() override {
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analogReadResolution(10);
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digitalWrite(PIN_ADC_CTRL, adc_active_state);
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uint32_t raw = 0;
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for (int i = 0; i < 8; i++) {
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raw += analogRead(PIN_VBAT_READ);
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}
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raw = raw / 8;
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digitalWrite(PIN_ADC_CTRL, !adc_active_state);
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return (ADC_MULTIPLIER * (3.3 / 1024.0) * raw) * 1000;
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}
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const char* getManufacturerName() const override {
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return "Heltec V3";
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}
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};
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