Board Support: Heltec v3 (#407)

Boards/heltec-wifi-lora-32-v3/Source/devices/Power.cpp

@@ -0,0 +1,20 @@
+#include "Power.h"
+
+#include <ChargeFromAdcVoltage.h>
+#include <EstimatedPower.h>
+#include <Tactility/hal/gpio/Gpio.h>
+#include <memory>
+
+// ADC enable pin on GPIO37
+constexpr auto ADC_CTRL = 37;
+
+std::shared_ptr<tt::hal::power::PowerDevice> createPower() {
+    ChargeFromAdcVoltage::Configuration configuration;
+    // 2.0 ratio, but +0.11 added as display voltage sag compensation.
+    configuration.adcMultiplier = 2.11;
+
+    // Configure the ADC enable pin as an output
+    tt::hal::gpio::configure(ADC_CTRL, tt::hal::gpio::Mode::Output, false, false);
+
+    return std::make_shared<EstimatedPower>(configuration);
+}