64 lines
2 KiB
Python
64 lines
2 KiB
Python
"""CircuitPython Essentials HID Keyboard example"""
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import time
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import board
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import digitalio
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import usb_hid
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from adafruit_hid.keyboard import Keyboard
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from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
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from adafruit_hid.keycode import Keycode
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# A simple neat keyboard demo in CircuitPython
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# The pins we'll use, each will have an internal pullup
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keypress_pins = [board.A1, board.A2]
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# Our array of key objects
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key_pin_array = []
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# The Keycode sent for each button, will be paired with a control key
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keys_pressed = [Keycode.A, "Hello World!\n"]
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control_key = Keycode.SHIFT
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# The keyboard object!
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time.sleep(1) # Sleep for a bit to avoid a race condition on some systems
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keyboard = Keyboard(usb_hid.devices)
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keyboard_layout = KeyboardLayoutUS(keyboard) # We're in the US :)
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# Make all pin objects inputs with pullups
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for pin in keypress_pins:
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key_pin = digitalio.DigitalInOut(pin)
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key_pin.direction = digitalio.Direction.INPUT
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key_pin.pull = digitalio.Pull.UP
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key_pin_array.append(key_pin)
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# For most CircuitPython boards:
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led = digitalio.DigitalInOut(board.LED)
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# For QT Py M0:
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# led = digitalio.DigitalInOut(board.SCK)
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led.direction = digitalio.Direction.OUTPUT
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print("Waiting for key pin...")
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while True:
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# Check each pin
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for key_pin in key_pin_array:
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if not key_pin.value: # Is it grounded?
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i = key_pin_array.index(key_pin)
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print("Pin #%d is grounded." % i)
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# Turn on the red LED
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led.value = True
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while not key_pin.value:
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pass # Wait for it to be ungrounded!
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# "Type" the Keycode or string
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key = keys_pressed[i] # Get the corresponding Keycode or string
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if isinstance(key, str): # If it's a string...
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keyboard_layout.write(key) # ...Print the string
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else: # If it's not a string...
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keyboard.press(control_key, key) # "Press"...
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keyboard.release_all() # ..."Release"!
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# Turn off the red LED
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led.value = False
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time.sleep(0.01)
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