Initial commit

firmware/main/main.ino

@@ -0,0 +1,164 @@
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+#include <Adafruit_FeatherOLED.h>
+
+
+#define DEBUG 0
+
+#define BUTTON_HOLD_TIME 500
+#define BUTTON_PRESS_TIME 20
+
+#define UP_BUTTON 31
+#define ENTER_BUTTON 30
+#define DOWN_BUTTON 27
+
+Adafruit_FeatherOLED oled = Adafruit_FeatherOLED();
+
+static const unsigned char PROGMEM arrow[] =
+{ B10000000,
+  B11000000,
+  B11100000,
+  B11000000,
+  B10000000};
+//oled.drawBitmap(0, 1, arrow, 8, 5, 1);
+
+
+enum buttonStates {
+	OPEN,
+	CLOSED,
+	CHECK_PRESSED,
+	PRESSED,
+	HELD,
+	NUM_BUTTONSTATES
+};
+
+enum screenStates {
+	PRESSURE,
+	SETTINGS,
+	NUM_SCREENSTATES
+};
+
+enum buttonStates upButton = OPEN;
+enum buttonStates enterButton = OPEN;
+enum buttonStates downButton = OPEN;
+
+int pressureSetPoint = 69;
+
+void setup()
+{
+  Serial.begin(115200);
+
+  oled.init();
+
+  pinMode(UP_BUTTON, INPUT_PULLUP);
+  pinMode(ENTER_BUTTON, INPUT); // Has external pullup
+  pinMode(DOWN_BUTTON, INPUT_PULLUP);
+}
+
+void loop() {
+	pollButtons();
+	runUI();
+}
+
+void runUI() {
+	static enum screenStates screenState = PRESSURE;
+
+	oled.clearDisplay();
+
+	switch (screenState) {
+		case PRESSURE:
+			if (enterButton == HELD) screenState = SETTINGS;
+
+			if (upButton == PRESSED) {
+				pressureSetPoint++;
+			} else if (downButton == PRESSED) {
+				pressureSetPoint--;
+			} else if (upButton == HELD) {
+				pressureSetPoint++;
+				delay(75);
+			} else if (downButton == HELD) {
+				pressureSetPoint--;
+				delay(75);
+			}
+
+
+			oled.setCursor(0,0);
+			oled.setTextSize(3);
+			oled.print(pressureSetPoint);
+
+			oled.display();
+
+			break;
+	}
+}
+
+void pollButtons() {
+	static unsigned long upButtonTime = 0;
+	static unsigned long enterButtonTime = 0;
+	static unsigned long downButtonTime = 0;
+
+	processButtonState(UP_BUTTON, upButton, upButtonTime);
+	processButtonState(ENTER_BUTTON, enterButton, enterButtonTime);
+	processButtonState(DOWN_BUTTON, downButton, downButtonTime);
+
+	if (DEBUG) {
+		if (upButton == PRESSED) {
+			Serial.println("up button pressed");
+		} else if (upButton == HELD) {
+			Serial.println("up button held");
+		}
+			
+		if (enterButton == PRESSED) {
+			Serial.println("enter button pressed");
+		} else if (enterButton == HELD) {
+			Serial.println("enter button held");
+		}
+			
+		if (downButton == PRESSED) {
+			Serial.println("down button pressed");
+		} else if (downButton == HELD) {
+			Serial.println("down button held");
+		}
+	}
+}
+
+void processButtonState(int buttonPin, buttonStates &buttonState, unsigned long &buttonTime) {
+	bool pinState = !digitalRead(buttonPin);
+
+	switch(buttonState) {
+		case OPEN:
+			if (pinState) {
+				buttonState = CLOSED;
+				buttonTime = millis();
+			}
+			break;
+		case CLOSED:
+			if (millis() >= buttonTime + BUTTON_HOLD_TIME) {
+				buttonState = HELD;
+			}
+			if (pinState) {
+				;
+			} else {
+				buttonState = CHECK_PRESSED;
+			}
+			break;
+		case CHECK_PRESSED:
+			if (millis() >= buttonTime + BUTTON_PRESS_TIME) {
+				buttonState = PRESSED;
+			} else {
+				buttonState = OPEN;
+			}
+			break;
+		case PRESSED:
+			buttonState = OPEN;
+			break;
+		case HELD:
+			if (!pinState) {
+				buttonState = OPEN;
+			}
+			break;
+		default:
+			break;
+	}
+}