Raspberry Pi GPIO output driver¶
This driver works with HD44780-screens connected to Raspberry Pi GPIO. The screen connected has to have its RW pin tied to ground.
Sample config.json:
"output":
[{
"driver":"pi_gpio",
"kwargs":
{
"pins":[25, 24, 23, 18],
"en_pin":4,
"en_pin":17
}
}]
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class
output.drivers.pi_gpio.
Screen
(pins=[], rs_pin=None, en_pin=None, debug=False, **kwargs)[source]¶ Driver for using HD44780 displays connected to Raspberry Pi GPIO. Presumes the R/W line is tied to ground. Also, doesn’t yet control backlight.
-
__init__
(pins=[], rs_pin=None, en_pin=None, debug=False, **kwargs)[source]¶ Initializes the GPIO-driven HD44780 display
All GPIOs passed as arguments will be used with BCM mapping.
- Kwargs:
pins
: list of GPIO pins for driving display data bits in format [DB4, DB5, DB6, DB7]en_pin
: EN pin GPIO number. Please, make sure it’s pulled down to GND (10K is OK). Otherwise, block might start filling up the screen unexpectedly.rs_pin
: RS pin GPIO number,debug
: enables printing out LCD commands.**kwargs
: all the other arguments, get passed further to HD44780 constructor
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