remaining exmplz

Author: ladyada

examples/pcf8575_blink16outputs.py

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+# SPDX-FileCopyrightText: Copyright (c) 2022 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+import time
+import board
+import adafruit_pcf8575
+
+print("PCF8575 16 output LED blink test")
+
+i2c = board.I2C()
+pcf = adafruit_pcf8575.PCF8575(i2c)
+
+while True:
+    pcf.write_gpio(0x5555)  # set every other pin high
+    time.sleep(0.2)
+    pcf.write_gpio(0xAAAA)  # toggle high/low pins
+    time.sleep(0.2)

examples/pcf8575_buttonled.py

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+# SPDX-FileCopyrightText: Copyright (c) 2022 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+import time
+import board
+import digitalio
+import adafruit_pcf8575
+
+print("PCF8575 digitalio LED + button test")
+
+i2c = board.I2C()
+pcf = adafruit_pcf8575.PCF8575(i2c)
+
+# get a 'digitalio' like pin from the pcf
+led = pcf.get_pin(8)
+button = pcf.get_pin(0)
+
+# Setup pin7 as an output that's at a high logic level default
+led.switch_to_output(value=True)
+# Setup pin0 as an output that's got a pullup
+button.switch_to_input(pull=digitalio.Pull.UP)
+
+
+while True:
+    led.value = button.value
+    time.sleep(0.01)  # debounce

examples/pcf8575_read16inputs.py

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+# SPDX-FileCopyrightText: Copyright (c) 2022 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+import time
+import board
+import adafruit_pcf8575
+
+print("PCF8575 16 input button test")
+
+i2c = board.I2C()
+pcf = adafruit_pcf8575.PCF8575(i2c)
+
+
+# turn on all 16 weak pullups
+pcf.write_gpio(0xFFFF)
+
+while True:
+    vals = pcf.read_gpio()
+    for b in range(16):
+        if not vals & (1 << b):
+            print("button #%d pressed" % b)
+    time.sleep(0.01)  # debounce delay