Get display to minimally work.

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.
@@ -121,7 +131,7 @@ const long MAX_FREQ = 150000000;
 
 //--------Si5351 Declaration---------------//
 
-Si5351 si5351;
+Si5351 si5351(0x61);
 //SDA is on pin A4 for Arduino Uno
 //SCL is on pin A5 for Arduino Uno
 
@@ -315,6 +325,20 @@ char getPermission(){
 }
 
 void setup(){
+  Serial.begin(9600); // This program won't work unless baud is 9600...why?
+  Serial.println("Start me up.");
+
+   // 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);
+  display.display(); // Call this AFTER any drawing command.
+
   // inialize LCD, display welcome message
   //lcd.begin(20, 4);
   //delay(250);
@@ -350,46 +374,46 @@ void setup(){
 }
 
 void loop(){
-  //if (displayNeedsUpdate) {displayInfo();}
+  // //if (displayNeedsUpdate) {displayInfo();}
-  //delay(80);
+  // //delay(80);
 
-  //detect whether encoder has changed position
+  // //detect whether encoder has changed position
-  long reading = encoder.read();
+  // long reading = encoder.read();
-  long encoderChange = reading - encoderPosition;
+  // long encoderChange = reading - encoderPosition;
-  encoderPosition = reading;
+  // encoderPosition = reading;
 
-  displayNeedsUpdate = false;
+  // displayNeedsUpdate = false;
   
-  //step up or down or change step size, for either button presses or encoder turns
+  // //step up or down or change step size, for either button presses or encoder turns
-  if ((encoderChange > 0)){currFreq += steps[currMode][stepIndex]; currFreq = min(currFreq, MAX_FREQ); setFrequency_5351(currFreq); displayNeedsUpdate = true;}
+  // if ((encoderChange > 0)){currFreq += steps[currMode][stepIndex]; currFreq = min(currFreq, MAX_FREQ); setFrequency_5351(currFreq); displayNeedsUpdate = true;}
-  if ((encoderChange < 0)){currFreq -= steps[currMode][stepIndex]; currFreq = max(currFreq, MIN_FREQ); setFrequency_5351(currFreq); displayNeedsUpdate = true;}
+  // if ((encoderChange < 0)){currFreq -= steps[currMode][stepIndex]; currFreq = max(currFreq, MIN_FREQ); setFrequency_5351(currFreq); displayNeedsUpdate = true;}
   
-  //pressing the encoder button increments through the possible step sizes for each mode
+  // //pressing the encoder button increments through the possible step sizes for each mode
-  if (checkButtonPress(PIN_BUTTON_ENCODER)){stepIndex = (stepIndex + 1) % (NUM_STEP_OPTIONS[currMode]); displayNeedsUpdate = true;}
+  // if (checkButtonPress(PIN_BUTTON_ENCODER)){stepIndex = (stepIndex + 1) % (NUM_STEP_OPTIONS[currMode]); displayNeedsUpdate = true;}
 
-  //pressing the mode button cycles through the available modes
+  // //pressing the mode button cycles through the available modes
-  if (checkButtonPress(PIN_BUTTON_MODE)){currMode = (currMode+1) % NUM_MODES; stepIndex = 0; setFrequency_5351(currFreq); displayNeedsUpdate = true;}
+  // if (checkButtonPress(PIN_BUTTON_MODE)){currMode = (currMode+1) % NUM_MODES; stepIndex = 0; setFrequency_5351(currFreq); displayNeedsUpdate = true;}
 
-  /*The mode button: if currFreq is inside an amateur band, save that frequency as the one to return to when
+  // /*The mode button: if currFreq is inside an amateur band, save that frequency as the one to return to when
-   * the user returns to this band, and jump to the return frequency for the next higher band. Otherwise,
+  //  * the user returns to this band, and jump to the return frequency for the next higher band. Otherwise,
-   * just jump to the next higher band
+  //  * just jump to the next higher band
-  */
+  // */
-  if (checkButtonPress(PIN_BUTTON_BAND)){
+  // if (checkButtonPress(PIN_BUTTON_BAND)){
-    int currBand = getCurrentBand();
+  //   int currBand = getCurrentBand();
-    if (currBand >= 0){
+  //   if (currBand >= 0){
-      lastBandFreq[currBand] = currFreq;
+  //     lastBandFreq[currBand] = currFreq;
-      currFreq = lastBandFreq[(getCurrentBand() + 1) % NUM_BANDS];
+  //     currFreq = lastBandFreq[(getCurrentBand() + 1) % NUM_BANDS];
-      setFrequency_5351(currFreq);
+  //     setFrequency_5351(currFreq);
-    }
+  //   }
-    else if (currBand == -2 || currBand == -3){
+  //   else if (currBand == -2 || currBand == -3){
-      currFreq = lastBandFreq[0];
+  //     currFreq = lastBandFreq[0];
-      setFrequency_5351(currFreq);
+  //     setFrequency_5351(currFreq);
-    }
+  //   }
-    else if (currBand == -1){
+  //   else if (currBand == -1){
-      for (int i = 0; i < NUM_BANDS; i++){
+  //     for (int i = 0; i < NUM_BANDS; i++){
-        if (currFreq < lastBandFreq[i]){currFreq = lastBandFreq[i]; setFrequency_5351(currFreq); break;}
+  //       if (currFreq < lastBandFreq[i]){currFreq = lastBandFreq[i]; setFrequency_5351(currFreq); break;}
-      }
+  //     }
-    }
+  //   }
-    displayNeedsUpdate = true;
+  //   displayNeedsUpdate = true;
-  }
+  // }
 }