platformio.ini

@@ -15,3 +15,5 @@ framework = arduino
 lib_deps = 
 	etherkit/Etherkit Si5351@^2.1.4
 	paulstoffregen/Encoder@^1.4.4
+	adafruit/Adafruit GFX Library@^1.11.9
+	adafruit/Adafruit SSD1306@^2.5.9

src/main.cpp

@@ -11,8 +11,18 @@
 #include <Wire.h>
 //#include <LiquidCrystal.h>
 #include <si5351.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
 
 
+//----------- OLED ------------------
+#define SCREEN_WIDTH 128 // OLED display width, in pixels
+#define SCREEN_HEIGHT 64 // OLED display height, in pixels
+
+// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
+#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
+Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
+
 //----------- Variables & Declarations ---------------
 /*
  * The current and desired LISTENING FREQUENCY, which is not always the frequency being output by the Si5351.
@@ -315,6 +325,18 @@ char getPermission(){
 }
 
 void setup(){
+  Serial.begin(9600); // This program won't work unless baud is 9600...why?
+  
+   // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
+  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
+    Serial.println("SSD1306 allocation failed");
+    for(;;); // Don't proceed, loop forever
+  }
+
+  // Clear the buffer
+  display.clearDisplay();
+  display.drawPixel(10, 10, WHITE);
+
   // inialize LCD, display welcome message
   //lcd.begin(20, 4);
   //delay(250);