code for three button foot switch

code for three button foot switch

Author: djecken

Three_Button_USB_FootSwitch/code.py

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+# SPDX-FileCopyrightText: 2022 Ruiz Bros for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import time
+import digitalio
+import board
+import usb_hid
+from adafruit_hid.consumer_control import ConsumerControl
+from adafruit_hid.consumer_control_code import ConsumerControlCode
+
+# The button pins we'll use, each will have an internal pullup
+buttonpins = [board.A1, board.A2, board.A3]
+
+# The keycode sent for each button, will be paired with a control key
+buttonkeys = [
+    ConsumerControlCode.PLAY_PAUSE, # Center Foot Pad
+    ConsumerControlCode.VOLUME_DECREMENT, #Left Foot Pad
+    ConsumerControlCode.VOLUME_INCREMENT, # Right Foot Pad
+]
+
+# the keyboard object!
+cc = ConsumerControl(usb_hid.devices) # List of available controls https://circuitpython.readthedocs.io/projects/hid/en/latest/api.html#adafruit-hid-keycode-keycode
+# our array of button objects
+buttons = []
+
+# make all pin objects, make them inputs w/pullups
+for pin in buttonpins:
+    button = digitalio.DigitalInOut(pin)
+    button.direction = digitalio.Direction.INPUT
+    button.pull = digitalio.Pull.UP
+    buttons.append(button)
+
+print("Waiting for button presses")
+
+while True:
+    # check each button
+    for button in buttons:
+        if not button.value:  # pressed?
+            i = buttons.index(button)
+
+            print("Button #%d Pressed" % i)
+
+            while not button.value:
+                pass  # wait for it to be released!
+            # type the keycode!
+            k = buttonkeys[i]  # get the corresp. keycode
+            cc.send(k)
+    time.sleep(0.01)