Heltec Wireless Tracker support

src/helpers/ui/ST7735Display.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "DisplayDriver.h"
+#include <Wire.h>
+#include <SPI.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_ST7735.h>
+
+class ST7735Display : public DisplayDriver {
+  Adafruit_ST7735 display;
+  bool _isOn;
+  uint16_t _color;
+
+  bool i2c_probe(TwoWire& wire, uint8_t addr);
+public:
+#ifdef USE_PIN_TFT
+  ST7735Display() : DisplayDriver(80, 160), display(PIN_TFT_CS, PIN_TFT_DC, PIN_TFT_SDA, PIN_TFT_SCL, PIN_TFT_RST) { _isOn = false; }
+#else
+  ST7735Display() : DisplayDriver(80, 160), display(&SPI1, PIN_TFT_CS, PIN_TFT_DC, PIN_TFT_RST) { _isOn = false; }
+#endif
+  bool begin();
+
+  bool isOn() override { return _isOn; }
+  void turnOn() override;
+  void turnOff() override;
+  void clear() override;
+  void startFrame(Color bkg = DARK) override;
+  void setTextSize(int sz) override;
+  void setColor(Color c) override;
+  void setCursor(int x, int y) override;
+  void print(const char* str) override;
+  void fillRect(int x, int y, int w, int h) override;
+  void drawRect(int x, int y, int w, int h) override;
+  void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
+  void endFrame() override;
+};