Simple test

Ensure your device works with this simple test.

examples/pcf8575_simpletest.py
 1# SPDX-FileCopyrightText: Copyright (c) 2022 ladyada for Adafruit Industries
 2#
 3# SPDX-License-Identifier: Unlicense
 4
 5import time
 6
 7import board
 8
 9import adafruit_pcf8575
10
11print("PCF8575 digitalio LED blink test")
12
13i2c = board.I2C()  # uses board.SCL and board.SDA
14# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
15pcf = adafruit_pcf8575.PCF8575(i2c)
16
17# get a 'digitalio' like pin from the pcf
18led = pcf.get_pin(0)
19
20# Setup pin 15 as an output that's at a high logic level default
21led.switch_to_output(value=True)
22
23while True:
24    led.value = True
25    time.sleep(0.2)
26    led.value = False
27    time.sleep(0.2)