Add another example file for SPI devices.

Fix copyright information.

Author: Red-M

adafruit_mcp230xx/mcp23s08.py

@@ -1,5 +1,6 @@
 # SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
 # SPDX-FileCopyrightText: 2019 Carter Nelson
+# SPDX-FileCopyrightText: 2021 Red_M
 #
 # SPDX-License-Identifier: MIT
 
@@ -9,7 +10,7 @@
 
 CircuitPython module for the MCP23S08 I2C I/O extenders.
 
-* Author(s): Tony DiCola
+* Author(s): Tony DiCola, Romy Bompart (2020), Red_M (2021)
 """
 
 from micropython import const

adafruit_mcp230xx/mcp23s17.py

@@ -1,5 +1,6 @@
 # SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
 # SPDX-FileCopyrightText: 2019 Carter Nelson
+# SPDX-FileCopyrightText: 2021 Red_M
 #
 # SPDX-License-Identifier: MIT
 

adafruit_mcp230xx/mcp23sxx.py

@@ -1,5 +1,6 @@
 # SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
 # SPDX-FileCopyrightText: 2019 Carter Nelson
+# SPDX-FileCopyrightText: 2021 Red_M
 #
 # SPDX-License-Identifier: MIT
 
@@ -9,7 +10,7 @@
 
 CircuitPython module for the MCP23S17 SPI I/O extenders.
 
-* Author(s): Tony DiCola, Romy Bompart (2020), Red_M (2021)
+* Author(s): Romy Bompart (2020), Red_M (2021)
 """
 
 from .mcp23xxx import MCP23XXX

adafruit_mcp230xx/mcp23xxx.py

@@ -1,5 +1,4 @@
-# SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
-# SPDX-FileCopyrightText: 2019 Carter Nelson
+# SPDX-FileCopyrightText: 2021 Red_M
 #
 # SPDX-License-Identifier: MIT
 
@@ -9,7 +8,7 @@
 
 CircuitPython module for the MCP23017, MCP23008 I2C and MCP23S17, MCP23S08 SPI I/O extenders.
 
-* Author(s): Tony DiCola, Romy Bompart (2020), Red_M (2021)
+* Author(s): Red_M
 """
 
 from adafruit_bus_device import i2c_device, spi_device

examples/mcp23Sxx_event_detect_interrupt.py

@@ -0,0 +1,77 @@
+# SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
+# SPDX-FileCopyrightText: 2021 Red_M
+#
+# SPDX-License-Identifier: MIT
+
+from time import sleep
+
+import board
+import busio
+from digitalio import Direction, Pull
+from RPi import GPIO
+from adafruit_mcp230xx.mcp23s17 import MCP23S17
+
+# Initialize the SPI bus:
+spi = busio.SPI(board.SCK_1, MOSI=board.MOSI_1, MISO=board.MISO_1)
+cs = digitalio.DigitalInOut(board.CS0)
+
+# Initialize the MCP23S17 chip on the bonnet
+mcp = MCP23S17(spi, cs)
+
+# Optionally change the address of the device if you set any of the A0, A1, A2
+# pins.  Specify the new address with a keyword parameter:
+# mcp = MCP23S17(spi, cs, address=0x21)  # MCP23S17 w/ A0 set
+
+# Make a list of all the pins (a.k.a 0-16)
+pins = []
+for pin in range(0, 16):
+    pins.append(mcp.get_pin(pin))
+
+# Set all the pins to input
+for pin in pins:
+    pin.direction = Direction.INPUT
+    pin.pull = Pull.UP
+
+# Set up to check all the port B pins (pins 8-15) w/interrupts!
+mcp.interrupt_enable = 0xFFFF  # Enable Interrupts in all pins
+# If intcon is set to 0's we will get interrupts on
+# both button presses and button releases
+mcp.interrupt_configuration = 0x0000  # interrupt on any change
+mcp.io_control = 0x44  # Interrupt as open drain and mirrored
+mcp.clear_ints()  # Interrupts need to be cleared initially
+
+# Or, we can ask to be notified CONTINUOUSLY if a pin goes LOW (button press)
+# we won't get an IRQ pulse when the pin is HIGH!
+# mcp.interrupt_configuration = 0xFFFF         # notify pin value
+# mcp.default_value = 0xFFFF         # default value is 'high' so notify whenever 'low'
+
+
+def print_interrupt(port):
+    """Callback function to be called when an Interrupt occurs."""
+    for pin_flag in mcp.int_flag:
+        print("Interrupt connected to Pin: {}".format(port))
+        print("Pin number: {} changed to: {}".format(pin_flag, pins[pin_flag].value))
+    mcp.clear_ints()
+
+
+# connect either interrupt pin to the Raspberry pi's pin 17.
+# They were previously configured as mirrored.
+GPIO.setmode(GPIO.BCM)
+interrupt = 17
+GPIO.setup(interrupt, GPIO.IN, GPIO.PUD_UP)  # Set up Pi's pin as input, pull up
+
+# The add_event_detect fuction will call our print_interrupt callback function
+# every time an interrupt gets triggered.
+GPIO.add_event_detect(interrupt, GPIO.FALLING, callback=print_interrupt, bouncetime=10)
+
+# The following lines are so the program runs for at least 60 seconds,
+# during that time it will detect any pin interrupt and print out the pin number
+# that changed state and its current state.
+# The program can be terminated using Ctrl+C. It doesn't matter how it
+# terminates it will always run GPIO.cleanup().
+try:
+    print("When button is pressed you'll see a message")
+    sleep(60)  # You could run your main while loop here.
+    print("Time's up. Finished!")
+finally:
+    GPIO.cleanup()

examples/mcp23Sxx_simpletest.py

@@ -1,4 +1,5 @@
 # SPDX-FileCopyrightText: 2017 Tony DiCola for Adafruit Industries
+# SPDX-FileCopyrightText: 2021 Red_M
 #
 # SPDX-License-Identifier: MIT