#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>

Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();

#define SERVOMIN  350 // this is the 'minimum' pulse length count (out of 4096)
#define SERVOMAX  385 // this is the 'maximum' pulse length count (out of 4096)


int atomPins[] = {2,3,4,5,6,7,8,9};
int currentValue = 0;
int values[] = {0,0,0,0,0,0,0,0,0};
int cycle = 0;

void setup() {
  Serial.begin(9600);
  
  for(int i=0; i<8; i++) {
    pinMode(atomPins[i], OUTPUT);
  }
  
  pwm.begin();
  pwm.setPWMFreq(60);  // Analog servos run at ~60 Hz updates

  delay(10);
}
 
void setServoPulse(uint8_t n, double pulse) {
  double pulselength;
  
  pulselength = 1000000;   // 1,000,000 us per second
  pulselength /= 60;   // 60 Hz
  Serial.print(pulselength); Serial.println(" us per period"); 
  pulselength /= 4096;  // 12 bits of resolution
  Serial.print(pulselength); Serial.println(" us per bit"); 
  pulse *= 1000000;  // convert to us
  pulse /= pulselength;
  Serial.println(pulse);
  pwm.setPWM(n, 0, pulse);
}

void loop() {   
  if(Serial.available()){
    int incomingValue = Serial.read();
    
    values[currentValue] = incomingValue;

    currentValue++;
    if(currentValue > 8){
      currentValue = 0;
    }
    cycle = 0;
  }

  while(cycle != 8) {
    for(int i=0; i<8; i++) {
      if(values[i]>0) {
        values[i]--;
        digitalWrite(atomPins[i], HIGH);
          pwm.setPWM(i, 0, SERVOMIN);
        if(values[i]==0) {
          digitalWrite(atomPins[i], LOW);
          pwm.setPWM(i, 0, ((SERVOMAX-SERVOMIN)/2)+SERVOMIN);
          cycle++;
        }
      }
    } 
    delay(100);
  }


}