Super simple SDVX controller with fading lights

SDVX.ino

// You will need the SoftPWM and Encoder libraries, available from
// the teensy website. Google!

// Edit the fade time to your liking.
// Edit the pins and keys if you use different ones.
// ENCODER PINS MUST BE 0, 1, 2, 3 FOR BEST PERFORMANCE
// Everything else can go wherever.

#include <Keyboard.h>
#include <Mouse.h>
#include <SoftPWM.h>
#define ENCODER_OPTIMIZE_INTERRUPTS
#include <Encoder.h>

#define DELAY     1  // Delay per loop in ms
#define FADE_TIME 200

typedef struct {
  Encoder enc;
  char axis;
} encoder_t;

#define ENCODER_COUNT 2

encoder_t encoders[ENCODER_COUNT] = {
  {Encoder(0, 1), 'x'},
  {Encoder(3, 2), 'y'}
};

typedef struct {
  uint8_t switchPin;
  uint8_t lightPin;
  char key;
} switch_t;

#define SWITCH_COUNT 7

switch_t switches[SWITCH_COUNT] = {
  {4, 5, KEY_RETURN}, // START
  {6, 7, 'd'}, // A
  {8, 9, 'f'}, // B
  {10, 16, 'j'}, // C
  {14, 15, 'k'}, // D
  {A0, A1, 'c'}, // FX A
  {A2, A3, 'm'}, // FX B
};
 
void setup()
{
  SoftPWMBegin(SOFTPWM_NORMAL);
  for(int i = 0; i < SWITCH_COUNT; i++) {
    pinMode(switches[i].switchPin, INPUT_PULLUP);
    pinMode(switches[i].lightPin, OUTPUT);
    SoftPWMSet(switches[i].lightPin, 0);
    SoftPWMSetFadeTime(switches[i].lightPin, 0, FADE_TIME);
  }

  Keyboard.begin();
}

void loop() {
 for(int i = 0; i < SWITCH_COUNT; i++) {
  if(digitalRead(switches[i].switchPin) == LOW) {
    Keyboard.press(switches[i].key);
    SoftPWMSet(switches[i].lightPin, 255);
  } else {
    Keyboard.release(switches[i].key);
    SoftPWMSet(switches[i].lightPin, 0);
  }
 }
  for(int i=0; i < ENCODER_COUNT;i++) {
    long encVal = encoders[i].enc.read();
    if(encVal != 0) {
      if(encoders[i].axis == 'x')
        Mouse.move(encVal,0,0);
      else
        Mouse.move(0,encVal,0);
 
      encoders[i].enc.write(0);
    }
  }
 
  delay(DELAY);
}