Arduino Based DIY Game Controller

After getting your PCB you need to solder all the components on the board. Solder pin headers to hold the arduino pro micro on the board and then solder all 10 push button switches for power purpose.

After soldering everything on the Pcb copy the following code and upload it to your arduino board :


#include "Keyboard.h"
// These are used as indices to other arrays
enum {
UP,
RIGHT,
DOWN,
LEFT,
A,
Z,
X,
S,
SELECT,
START,
// Number of keys
NUM_KEYS,
};

// Maps button index to digital pin
const int PINS[] = {
2, // UP
3, // RIGHT
4, // DOWN
5, // LEFT
14, // A
10, // Z
16, // X
15, // S
9, // SELECT
8, // START
};

// Maps button to keyboard key
const char KEYS[] = {
KEY_UP_ARROW, // UP
KEY_RIGHT_ARROW, // RIGHT
KEY_DOWN_ARROW, // DOWN
KEY_LEFT_ARROW, // LEFT
'a', // A
'z', // Z
'x', // X
's', // S
KEY_RETURN, // SELECT
' ', // START
};

// Store previous state of keys
bool STATES[NUM_KEYS];

// Left and right LED pins
#define LED0 7
#define LED1 6

// Initialize
void setup() {
Keyboard.begin();
for (int i = 0; i < NUM_KEYS; i++) {
pinMode(PINS[i], INPUT_PULLUP);
STATES[i] = digitalRead(PINS[i]);
}
pinMode(LED0, OUTPUT);
pinMode(LED1, OUTPUT);
}

// Main loop
void loop() {
bool state;
// Flash LEDs
const unsigned long t = millis();
digitalWrite(LED0, (t / 1000) % 2 == 0 ? HIGH : LOW);
digitalWrite(LED1, (t / 1000) % 2 == 0 ? LOW : HIGH);
// Process each key
for (int i = 0; i < NUM_KEYS; i++) {
state = digitalRead(PINS[i]);
if (STATES[i] != state) {
if (state == LOW) {
Keyboard.press(KEYS[i]);
} else {
Keyboard.release(KEYS[i]);
}
STATES[i] = state;
}
}
}