61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
# SPDX-FileCopyrightText: 2018 John Edgar Park for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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# Gemma Radio Tuning Knob
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# for fine tuning Software Defined Radio CubicSDR software
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# 10k pot hooked to 3v, A2, and D2 acting as GND
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import time
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import board
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import usb_hid
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from adafruit_hid.keyboard import Keyboard
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from adafruit_hid.keycode import Keycode
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from analogio import AnalogIn
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from digitalio import DigitalInOut, Direction
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d2_ground = DigitalInOut(board.D2)
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d2_ground.direction = Direction.OUTPUT
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d2_ground.value = False
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analog2in = AnalogIn(board.A2)
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led = DigitalInOut(board.D13)
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led.direction = Direction.OUTPUT
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pot_max = 3.29
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pot_min = 0.00
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step = (pot_max - pot_min) / 10.0
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last_knob = 0
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def steps(x):
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return round((x - pot_min) / step)
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def getVoltage(pin):
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return (pin.value * 3.3) / 65536
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def spamKey(code):
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knobkeys = [Keycode.RIGHT_BRACKET, Keycode.RIGHT_BRACKET,
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Keycode.RIGHT_BRACKET, Keycode.RIGHT_BRACKET,
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Keycode.RIGHT_BRACKET, Keycode.SPACE,
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Keycode.LEFT_BRACKET, Keycode.LEFT_BRACKET,
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Keycode.LEFT_BRACKET, Keycode.LEFT_BRACKET,
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Keycode.LEFT_BRACKET]
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spamRate = [0.01, 0.05, 0.125, 0.25, 0.5,
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0.5, 0.5, 0.25, 0.125, 0.05, 0.01]
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kbd = Keyboard(usb_hid.devices)
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kbd.press(knobkeys[code]) # which keycode is entered
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kbd.release_all()
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time.sleep(spamRate[code]) # how fast the key is spammed
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while True:
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knob = (getVoltage(analog2in))
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if steps(knob) == 5: # the center position is active
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led.value = True
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elif steps(knob) != 5:
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led.value = False
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spamKey(steps(knob))
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