# This file is part of the Troopers 19 Badge project, https://troopers.de/troopers19/
#
# The BSD 3-Clause License
#
# Copyright (c) 2019 "Malte Heinzelmann" <malte@hnzlmnn.de>
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import time
from machine import Pin

from libs import PCA95XX


class PCA9539A(PCA95XX):


    def read_port(self, port=0x00):
        # Select the port
        if type(port) is not bytearray:
            port = bytearray(port)
        self.i2c.writeto(self.address, port)
        return self.i2c.readfrom(self.address, 1)[0]

    def read_state(self):
        # P0_7 ... P0_0 ... P1_7 ... P0_0
        return ('0' * 8 + bin(self.read_port(0x00))[2:])[-8:] + ('0' * 8 + bin(self.read_port(0x01))[2:])[-8:]
