* Heltec tracker: new 'periph_power' shared pin (between Display & GPS)

src/helpers/HeltecV3Board.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <Arduino.h>
+#include <helpers/RefCountedDigitalPin.h>
 
 // LoRa radio module pins for Heltec V3
 // Also for Heltec Wireless Tracker
@@ -20,7 +21,6 @@
 #define  PIN_ADC_CTRL_ACTIVE    LOW
 #define  PIN_ADC_CTRL_INACTIVE  HIGH
 //#define  PIN_LED_BUILTIN 35
-#define  PIN_VEXT_EN     36
 
 #include "ESP32Board.h"
 
@@ -31,6 +31,10 @@ private:
   bool adc_active_state;
 
 public:
+  RefCountedDigitalPin periph_power;
+
+  HeltecV3Board() : periph_power(PIN_VEXT_EN) { }
+
   void begin() {
     ESP32Board::begin();
 
@@ -41,8 +45,7 @@ public:
     pinMode(PIN_ADC_CTRL, OUTPUT);
     digitalWrite(PIN_ADC_CTRL, !adc_active_state); // Initially inactive
 
-    pinMode(PIN_VEXT_EN, OUTPUT);
-    digitalWrite(PIN_VEXT_EN, LOW);  // for V3.2 boards
+    periph_power.begin();
 
     esp_reset_reason_t reason = esp_reset_reason();
     if (reason == ESP_RST_DEEPSLEEP) {