#include <HX711.h>
#include <PinChangeInterrupt.h>
#include <protothreads.h>
#include <AccelStepper.h>

HX711 scale;//initiates HX711 load cell amplifier

#define DT  5
#define SCK  6
#define dirPin 7
#define stepPin 8
#define tensioningPin 2
#define calibration_factor 420//This value is obtained using the SparkFun_HX711_Calibration sketch
#define motorInterfaceType 1
volatile float units;
float setpounds;


AccelStepper stepper = AccelStepper(motorInterfaceType, stepPin, dirPin);

static struct pt pt1, pt2;

static int protothreadReadScaleThread(struct pt* pt)
{
  PT_BEGIN(pt);
   while(true)
  {
    Serial.println("in scale loop");
    units=scale.get_units(1);
  }
  PT_END(pt);
}

static int protothreadRunStepperThread(struct pt* pt)
{
  PT_BEGIN(pt);
   while(true)
  {
    Serial.println(units);
    Serial.println("in stepper loop");
    stepper.runSpeed();
  }
  PT_END(pt);
}

void setup()
{
Serial.begin(614400);
Serial.println("insetup");
scale.begin(DT, SCK);
scale.set_scale(calibration_factor);
stepper.setMaxSpeed(100);
stepper.setAcceleration(20);
stepper.moveTo(500);
digitalWrite(dirPin, HIGH);
PT_INIT(&pt1);
PT_INIT(&pt2);
stepper.setMaxSpeed(1000);
stepper.setSpeed(50);
}


void loop()
{ 
  units=scale.get_units(3);
  Serial.println(units);
  delay(500);
   protothreadRunStepperThread(&pt1);
   protothreadReadScaleThread(&pt2);
}