#! /usr/bin/python3

# PCA9534 GPIO Expander Pin Test using libsimpleio

# Copyright (C)2024, Philip Munts dba Munts Technologies.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

import ctypes
import munts.devices.pca9534
import munts.libsimpleio.i2c
import munts.libsimpleio.raspberrypi

from munts.interfaces.gpio import Direction

print("\nPCA9534 GPIO Expander Pin Test using libsimpleio\n")

bus  = munts.libsimpleio.i2c.Bus(munts.libsimpleio.raspberrypi.I2C1)
dev  = munts.devices.pca9534.Device(bus, 0x27)
outp = munts.devices.pca9534.Pin(dev, 0, Direction.Output)

# Toggle GPIO output

while True:
  outp.state = not outp.state
