20160416

hoge.cpp

int currentStep = 0;
constexpr int NUM_STEP = 16;

// d3 d4 d5 = 74hc138 in a b c
const uint8_t LED_BIT_TABLE[NUM_STEP][3] = {
  {0, 0, 0},
  {1, 0, 0},
  {0, 1, 0},
  {1, 1, 0},
  {0, 0, 1},
  {1, 0, 1},
  {0, 1, 1},
  {1, 1, 1},

  {0, 0, 0},
  {1, 0, 0},
  {0, 1, 0},
  {1, 1, 0},
  {0, 0, 1},
  {1, 0, 1},
  {0, 1, 1},
  {1, 1, 1},
};


// d7 lo 8bits
// d6 hi 8bits

void step()
{

 // turn LEDs
 digitalWrite(3, LED_BIT_TABLE[currentStep][0]);
 digitalWrite(4, LED_BIT_TABLE[currentStep][1]);
 digitalWrite(5, LED_BIT_TABLE[currentStep][2]);

 if (currentStep < 8) {
  digitalWrite(7, LOW);
  digitalWrite(6, HIGH);
 } else {
  digitalWrite(7, HIGH);
  digitalWrite(6, LOW);
 }


 // read analog value
 digitalWrite(8, LED_BIT_TABLE[currentStep][0]);
 digitalWrite(9, LED_BIT_TABLE[currentStep][1]);
 digitalWrite(10, LED_BIT_TABLE[currentStep][2]);

 const auto pin = currentStep < 8 ? 0 : 4;
 const auto analogValue = analogRead(pin);
 analogWrite(11, analogValue >> 2);
 
 Serial.println(analogValue);
 currentStep++;
 if (currentStep == NUM_STEP) {
   currentStep = 0;
 }
}

void setup() {
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  
  Serial.begin(115200);

  attachInterrupt(0, step, RISING);
  step();
}

void loop() { 
 
}