130 lines
4.4 KiB
Python
130 lines
4.4 KiB
Python
# SPDX-FileCopyrightText: 2021 John Park for Adafruit Industries.
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#
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# SPDX-License-Identifier: MIT
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"""
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Power Glove BLE MIDI with Feather Sense nRF52840
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Sends MIDI CC values based on finger flex sensors and accelerometer
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"""
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import time
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import board
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import adafruit_ble
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from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
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import adafruit_ble_midi
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import adafruit_midi
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from adafruit_midi.control_change import ControlChange
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# from adafruit_midi.note_on import NoteOn
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# from adafruit_midi.pitch_bend import PitchBend
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import adafruit_lsm6ds.lsm6ds33 # accelerometer
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import simpleio
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from analogio import AnalogIn
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i2c = board.I2C() # uses board.SCL and board.SDA
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# i2c = board.STEMMA_I2C() # For using the built-in STEMMA QT connector on a microcontroller
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sense_accel = adafruit_lsm6ds.lsm6ds33.LSM6DS33(i2c)
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analog_in_thumb = AnalogIn(board.A3)
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analog_in_index = AnalogIn(board.A2)
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analog_in_middle = AnalogIn(board.A1)
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analog_in_ring = AnalogIn(board.A0)
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# Pick your MIDI CC numbers here
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cc_x_num = 7 # volume
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cc_y_num = 70 # unassigned
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cc_thumb_num = 71 # unassigned
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cc_index_num = 75 # unassigned
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cc_middle_num = 76 # unassigned
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cc_ring_num = 77 # unassigned
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midi_channel = 1 # pick your midi out channel here
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# Use default HID descriptor
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midi_service = adafruit_ble_midi.MIDIService()
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advertisement = ProvideServicesAdvertisement(midi_service)
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ble = adafruit_ble.BLERadio()
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if ble.connected:
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for c in ble.connections:
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c.disconnect()
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midi = adafruit_midi.MIDI(midi_out=midi_service, out_channel=midi_channel - 1)
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print("advertising")
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ble.name="Power Glove MIDI"
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ble.start_advertising(advertisement)
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# reads an analog pin and returns value remapped to out range, e.g., 0-127
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def get_flex_cc(sensor, low_in, high_in, min_out, max_out):
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flex_raw = sensor.value
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flex_cc = simpleio.map_range(flex_raw, low_in, high_in, min_out, max_out)
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flex_cc = int(flex_cc)
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return flex_cc
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debug = False # set debug mode True to test raw values, set False to run BLE MIDI
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while True:
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if debug:
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accel_data = sense_accel.acceleration # get accelerometer reading
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accel_x = accel_data[0]
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accel_y = accel_data[1]
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accel_z = accel_data[2]
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print(
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"x:{} y:{} z:{} thumb:{} index:{} middle:{} ring:{}".format(
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accel_x,
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accel_y,
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accel_x,
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analog_in_thumb.value,
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analog_in_index.value,
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analog_in_middle.value,
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analog_in_ring.value,
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)
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)
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time.sleep(0.2)
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else:
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print("Waiting for connection")
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while not ble.connected:
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pass
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print("Connected")
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while ble.connected:
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# Feather Sense accelerometer readings to CC
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accel_data = sense_accel.acceleration # get accelerometer reading
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accel_x = accel_data[0]
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accel_y = accel_data[1]
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# accel_z = accel_data[2]
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# Remap analog readings to cc range
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cc_x = int(simpleio.map_range(accel_x, 0, 9, 127, 0))
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cc_y = int(simpleio.map_range(accel_y, 1, -9, 0, 127))
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cc_thumb = get_flex_cc(analog_in_thumb, 49000, 35000, 127, 0)
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cc_index = get_flex_cc(analog_in_index, 50000, 35000, 0, 127)
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cc_middle = get_flex_cc(analog_in_middle, 55000, 40000, 0, 127)
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cc_ring = get_flex_cc(analog_in_ring, 55000, 42000, 0, 127)
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'''
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print(
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"CC_X:{} CC_Y:{} CC_Thumb:{} CC_Index:{} CC_Middle:{} CC_Ring:{}".format(
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cc_x, cc_y, cc_thumb, cc_index, cc_middle, cc_ring
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)
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)'''
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# send all the midi messages in a list
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midi.send(
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[
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ControlChange(cc_x_num, cc_x),
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ControlChange(cc_y_num, cc_y),
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ControlChange(cc_thumb_num, cc_thumb),
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ControlChange(cc_index_num, cc_index),
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ControlChange(cc_middle_num, cc_middle),
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ControlChange(cc_ring_num, cc_ring),
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]
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)
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# If you want to send NoteOn or Pitch Bend, here are examples:
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# midi.send(NoteOn(44, 120)) # G sharp 2nd octave
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# a_pitch_bend = PitchBend(random.randint(0, 16383))
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# midi.send(a_pitch_bend)
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print("Disconnected")
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print()
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ble.start_advertising(advertisement)
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