MCP23009

Author: hishizuka

doc/hardware_installation.md

@@ -180,6 +180,8 @@ This is essential for displays without buttons, like MIP displays.
 
 - [Button SHIM](https://shop.pimoroni.com/products/button-shim)
 - <img src="https://user-images.githubusercontent.com/12926652/91799330-cfc50580-ec61-11ea-9045-e1991aed205c.png" width=240 />
+- IO Expander (with MCP230009 and some buttons)
+- <img src="https://github.com/hishizuka/pizero_bikecomputer/assets/12926652/0477aac3-96a2-40f9-bae9-efd3d77ed46f" width=480 />
 
 ### Battery
 

doc/software_installation.md

@@ -198,6 +198,12 @@ $ sudo pip3 install magnetic-field-calculator
 $ sudo apt install python3-buttonshim
 ```
 
+#### IO Expander (with MCP230009 and some buttons)
+
+```
+$ sudo apt install adafruit-circuitpython-mcp230xx
+```
+
 #### PiJuice HAT
 
 Follow [official setup guide](https://github.com/PiSupply/PiJuice/tree/master/Software) of PiSupply/PiJuice

modules/sensor/i2c/MCP23009.py

@@ -1,12 +1,13 @@
-from .base.button_io_expander import ButtonIOExpander
-from adafruit_mcp230xx.mcp23008 import MCP23008 as MCP
 import board
 import busio
+from adafruit_mcp230xx.mcp23008 import MCP23008 as MCP
+
+from .base.button_io_expander import ButtonIOExpander
+
 
 # https://www.microchip.com/en-us/product/mcp23009
 # https://ww1.microchip.com/downloads/en/DeviceDoc/20002121C.pdf
 
-
 # NOTE: no need to set TEST and RESET address and value, due to adafruit_mcp230xx library handling it.
 class MCP23009(ButtonIOExpander):
 

modules/sensor/i2c/base/button_io_expander.py

@@ -1,8 +1,9 @@
-from digitalio import Direction, Pull
 import time
 from threading import Thread
-from logger import app_logger
 
+from digitalio import Direction, Pull
+
+from logger import app_logger
 
 try:
     # run from top directory (pizero_bikecomputer)