demo encoder

firmware/platformio.ini

@@ -12,3 +12,9 @@
 platform = atmelavr
 board = uno
 framework = arduino
+
+lib_deps =
+  Wire
+  blackhack/LCD_I2C@^2.3.0
+  luisllamasbinaburo/I2CScanner@^1.0.1
+  robtillaart/PCF8574@^0.4.1

firmware/src/main.cpp

@@ -1,18 +1,92 @@
 #include <Arduino.h>
+#include <Wire.h>
+#include <LCD_I2C.h>
+// #include <I2C_Scanner.h>
+#include <I2CScanner.h>
+#include <PCF8574.h>
 
-// put function declarations here:
-int myFunction(int, int);
+#define BUZZER_PIN 11
+
+// when rotated clockwise, CLK changes before DT
+#define CLK_PIN 7
+#define DT_PIN 6
+#define SW_PIN 5 // switch, goes low when pressed
+
+I2CScanner scanner;
+
+LCD_I2C lcd(0x27, 16, 2);
+PCF8574 PCF(0x21, &Wire);
+
+void helloBuzz();
 
 void setup() {
-  // put your setup code here, to run once:
-  int result = myFunction(2, 3);
+  pinMode(LED_BUILTIN, OUTPUT);
+  pinMode(CLK_PIN, INPUT);
+  pinMode(DT_PIN, INPUT);
+  pinMode(SW_PIN, INPUT_PULLUP);
+
+  Wire.begin();
+  scanner.Init();
+
+  lcd.begin();
+  lcd.backlight();
+
+  Serial.begin(9600);
+  Serial.println("Hello World!");
+  helloBuzz();
+
+  if (!PCF.begin())
+  {
+    Serial.println("could not initialize...");
+  }
+  if (!PCF.isConnected())
+  {
+    Serial.println("=> not connected");
+    while(1);
+  }
+
+}
+
+void buzzOff()
+{
+  noTone(BUZZER_PIN);
+  pinMode(BUZZER_PIN, INPUT);
+}
+
+void helloBuzz() {
+  tone(BUZZER_PIN, 500, 100);
+  delay(100);
+  tone(BUZZER_PIN, 1000, 100);
+  delay(100);
+  tone(BUZZER_PIN, 4000, 100);
+  delay(100);
+  buzzOff();
 }
 
 void loop() {
-  // put your main code here, to run repeatedly:
-}
+  tone(BUZZER_PIN, 100, 5);
 
-// put function definitions here:
-int myFunction(int x, int y) {
-  return x + y;
-}
+  // scanner.Scan();
+
+  lcd.print("  cewk-o-mator  ");
+  lcd.print("   HSWAW 2024   ");
+
+  PCF.write8(0b11110000); // first 4 bits are columns, low when pressed
+  // PCF.write8(0b00001111); // last 4 bits are rows, low when pressed
+  int x = PCF.read8();
+  // Serial.print("Keyboard: ");
+  // Serial.println(x, BIN);
+
+  bool clk = digitalRead(CLK_PIN);
+  bool dt = digitalRead(DT_PIN);
+  bool sw = digitalRead(SW_PIN);
+
+  Serial.print("CLK: ");
+  Serial.print(clk);
+  Serial.print(" DT: ");
+  Serial.print(dt);
+  Serial.print(" SW: ");
+  Serial.println(sw);
+
+  delay(200);
+}