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HaithamJoyStick.ino
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218
HaithamJoyStick.ino
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#include <FastLED.h>
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#include <Wire.h>
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#include <Adafruit_SSD1306.h>
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#include <Adafruit_DotStarMatrix.h>
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#include <Adafruit_DotStar.h>
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#include <SPI.h>
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#include <SparkFun_APDS9960.h>
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#undef WAIT // Prevent macro conflict with FastLED
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// ============ PIN DEFINITIONS ============
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// PublicI2C (slave) pins
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#define PUBLIC_I2C_SDA 21
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#define PUBLIC_I2C_SCL 22
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#define PUBLIC_I2C_ADDR 0x42 // Example slave address
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// LocalI2C (master) pins
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#define LOCAL_I2C_SDA 12
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#define LOCAL_I2C_SCL 11
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// OLED display settings
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#define SCREEN_WIDTH 128
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#define SCREEN_HEIGHT 64
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#define OLED_RESET -1
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// Joystick pins
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#define JOY_X_PIN 1 // ADC1_CH0
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#define JOY_Y_PIN 2 // ADC1_CH1
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#define JOY_BTN_PIN 3 // Digital input
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// FastLED (NeoPixel) settings
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#define NUM_LEDS 16
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#define LED_DATA_PIN 5 // Example GPIO for LED data
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// DotStar HD 8x8 Grid settings
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#define DOTSTAR_WIDTH 8
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#define DOTSTAR_HEIGHT 8
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#define DOTSTAR_DATA 6 // Example GPIO for DotStar data
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#define DOTSTAR_CLK 7 // Example GPIO for DotStar clock
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// ============ I2C BUS OBJECTS ============
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TwoWire PublicI2C = TwoWire(0); // I2C0 (slave)
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TwoWire LocalI2C = TwoWire(1); // I2C1 (master)
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// ============ DEVICE OBJECTS =============
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &LocalI2C, OLED_RESET);
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// Use a SparkFun_APDS9960 library that supports TwoWire
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SparkFun_APDS9960 apds(&LocalI2C);
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CRGB leds[NUM_LEDS];
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Adafruit_DotStarMatrix dotstar = Adafruit_DotStarMatrix(
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DOTSTAR_WIDTH, DOTSTAR_HEIGHT, DOTSTAR_DATA, DOTSTAR_CLK,
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DS_MATRIX_TOP + DS_MATRIX_LEFT + DS_MATRIX_ROWS + DS_MATRIX_PROGRESSIVE,
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DOTSTAR_BRG
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);
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// ============ DATA STRUCTURES ============
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struct SensorData {
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int8_t joystickDir; // -1=none, 0=up, 1=down, 2=left, 3=right
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bool joystickBtn;
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uint16_t colorR, colorG, colorB, colorC;
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};
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volatile SensorData latestData;
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// ============ I2C SLAVE DATA HANDLERS =========
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void receiveEvent(int numBytes) {
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// Not used in this application, but required by Wire
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}
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void requestEvent() {
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// Copy volatile to local to avoid race conditions
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SensorData copy;
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noInterrupts();
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copy = latestData;
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interrupts();
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// Send as a binary buffer
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PublicI2C.write((uint8_t*)©, sizeof(SensorData));
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}
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// ============ JOYSTICK INTERPRETATION =========
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#define JOY_THRESHOLD_HIGH 3000
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#define JOY_THRESHOLD_LOW 1000
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void updateJoystick(SensorData &data) {
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int joyX = analogRead(JOY_X_PIN);
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int joyY = analogRead(JOY_Y_PIN);
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bool joyBtn = digitalRead(JOY_BTN_PIN) == LOW;
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// Default: no direction
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data.joystickDir = -1;
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if (joyY > JOY_THRESHOLD_HIGH) data.joystickDir = 0; // Up
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else if (joyY < JOY_THRESHOLD_LOW) data.joystickDir = 1; // Down
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else if (joyX < JOY_THRESHOLD_LOW) data.joystickDir = 2; // Left
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else if (joyX > JOY_THRESHOLD_HIGH) data.joystickDir = 3; // Right
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data.joystickBtn = joyBtn;
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}
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// ============ COLOR SENSOR READING =========
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void updateColorSensor(SensorData &data) {
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uint16_t r=0, g=0, b=0, c=0;
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if (apds.readAmbientLight(c) &&
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apds.readRedLight(r) &&
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apds.readGreenLight(g) &&
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apds.readBlueLight(b)) {
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data.colorR = r;
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data.colorG = g;
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data.colorB = b;
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data.colorC = c;
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}
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}
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// ============ DISPLAY LOGIC =========
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void updateDisplays(const SensorData &data) {
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// DotStar: show direction as arrow or color as background
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dotstar.fillScreen(0);
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if (data.joystickDir == 0) dotstar.drawPixel(3, 0, dotstar.Color(0,0,255)); // Up
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else if (data.joystickDir == 1) dotstar.drawPixel(3, 7, dotstar.Color(0,0,255)); // Down
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else if (data.joystickDir == 2) dotstar.drawPixel(0, 3, dotstar.Color(0,0,255)); // Left
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else if (data.joystickDir == 3) dotstar.drawPixel(7, 3, dotstar.Color(0,0,255)); // Right
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else dotstar.fillScreen(dotstar.Color(data.colorR>>2, data.colorG>>2, data.colorB>>2)); // Show color
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dotstar.show();
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// FastLED: color bar with button brightness
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uint8_t brightness = data.joystickBtn ? 255 : 64;
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for (int i = 0; i < NUM_LEDS; i++) {
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leds[i] = CRGB(data.colorR>>4, data.colorG>>4, data.colorB>>4);
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leds[i].nscale8_video(brightness);
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}
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FastLED.show();
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// OLED: show values
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display.clearDisplay();
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display.setCursor(0,0);
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display.print("Dir: ");
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switch (data.joystickDir) {
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case 0: display.println("Up"); break;
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case 1: display.println("Down"); break;
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case 2: display.println("Left"); break;
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case 3: display.println("Right"); break;
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default: display.println("None"); break;
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}
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display.print("Btn: "); display.println(data.joystickBtn ? "Pressed" : "Released");
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display.print("R: "); display.println(data.colorR);
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display.print("G: "); display.println(data.colorG);
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display.print("B: "); display.println(data.colorB);
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display.print("C: "); display.println(data.colorC);
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display.display();
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}
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// ============ SETUP FUNCTION =============
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void setup() {
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Serial.begin(115200);
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// --- Initialize PublicI2C as Slave ---
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PublicI2C.begin(PUBLIC_I2C_ADDR, PUBLIC_I2C_SDA, PUBLIC_I2C_SCL, 100000);
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PublicI2C.onReceive(receiveEvent);
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PublicI2C.onRequest(requestEvent);
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Serial.println("PublicI2C (slave) initialized.");
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// --- Initialize LocalI2C as Master ---
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LocalI2C.begin(LOCAL_I2C_SDA, LOCAL_I2C_SCL, 100000);
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Serial.println("LocalI2C (master) initialized.");
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// --- Initialize OLED Display ---
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if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
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Serial.println("SSD1306 allocation failed");
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while (1);
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}
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display.clearDisplay();
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display.setTextSize(1);
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display.setTextColor(SSD1306_WHITE);
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display.setCursor(0,0);
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display.println("OLED Ready!");
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display.display();
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// --- Initialize APDS-9960 (SparkFun) ---
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if (!apds.init()) { // Uses LocalI2C if library supports it
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Serial.println("APDS-9960 initialization failed");
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display.println("No APDS-9960!");
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display.display();
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while (1);
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}
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display.println("APDS-9960 ready!");
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display.display();
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// Enable color sensing
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apds.enableLightSensor(false);
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// --- Initialize Joystick Pins ---
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pinMode(JOY_BTN_PIN, INPUT_PULLUP); // Button is active LOW
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// --- Initialize FastLED (NeoPixel) ---
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FastLED.addLeds<NEOPIXEL, LED_DATA_PIN>(leds, NUM_LEDS);
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FastLED.clear();
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FastLED.show();
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// --- Initialize DotStar Matrix ---
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dotstar.begin();
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dotstar.setBrightness(32); // Adjust as needed
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dotstar.fillScreen(0);
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dotstar.show();
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}
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// ============ MAIN LOOP ==================
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void loop() {
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SensorData tempData;
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updateJoystick(tempData);
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updateColorSensor(tempData);
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// Copy to shared struct for I2C
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noInterrupts();
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latestData = tempData;
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interrupts();
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updateDisplays(tempData);
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delay(50); // Adjust as needed
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}
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