import utime
import machine # import Pin
from machine import Pin
import time

class HX711:

        def __init__(self, pd_sck=4, dout=5, gain=128):
                self.gain = gain
                self.dataPin = Pin(dout, Pin.IN)
                self.pdsckPin = Pin(pd_sck, Pin.OUT, value=0)
                self.powerDown()
                self.powerUp()
                self.read()

        def isready(self):
                time.sleep(.001)
                return self.dataPin.value() == 0

        def read(self):
                self.powerUp()
                while not self.isready():
                        pass
                print("<waiting finished> dataPin: {}, sckPin: {}".format(self.dataPin.value(), self.pdsckPin.value()))
                my = 0
                now = utime.ticks_us()
                for i in range(24):
                        now = utime.ticks_us()
                        self.pdsckPin.value(1)
                        self.pdsckPin.value(0)
                        data = self.dataPin.value()
                        myus += ", " + str(utime.ticks_diff(utime.ticks_us(), now))
                        mydata += str(data)
                        my = ( my << 1) | data
                        print("bitbanged: ", my)
                        print("us: ", myus)
                        print("data: ", mydata)

                for i in range(3):
                        self.pdsckPin.value(1)
                        utime.sleep_us(2)
                        self.pdsckPin.value(0)
                        self.powerDown()

        def powerDown(self):
                self.pdsckPin.value(0)
                self.pdsckPin.value(1)
                utime.sleep_us(80)

        def powerUp(self):
                self.pdsckPin.value(0)