Adafruit CharLCD Plate&Chinese “LCD RGB KEYPAD” shield input driver¶
This driver works with Adafruit Raspberry Pi character LCD&button shields, as well as with Chinese clones following the schematic (can be bought for 5$ on eBay, typically have “LCD RGB KEYPAD ForRPi” written on them).
Sample config.json
section:
"input":
[{
"driver":"adafruit_plate"
}]
Note
Generally, you won’t need to edit config.json
if you’re using this shield because it’ll be done automatically by config.sh
.
-
class
input.drivers.adafruit_plate.
InputDevice
(addr=32, bus=1, **kwargs)[source]¶ A driver for Adafruit-developed Raspberry Pi character LCD&button shields based on MCP23017, either Adafruit-made or Chinese-made.
Tested on hardware compatible with Adafruit schematic and working with Adafruit libraries, but not on genuine Adafruit hardware.
-
__init__
(addr=32, bus=1, **kwargs)[source]¶ Initialises the
InputDevice
object.Kwargs:
bus
: I2C bus number.addr
: I2C address of the expander.
-
process_data
(data)[source]¶ Checks data received from IO expander and classifies changes as either “button up” or “button down” events. On “button up”, calls send_key with the corresponding button name from
self.mapping
.
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