ash/Pi-Pico-ExpressionPedal2Midi
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Ashley Strahle
2021-01-26 19:30:58 +10:00
parent ab04834324
commit 27b6e34602
1 changed files with 22 additions and 9 deletions
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31
main.py
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@@ -1,14 +1,17 @@
import sys
import usb_midi import usb_midi
import adafruit_midi import adafruit_midi
from adafruit_midi.control_change import ControlChange from adafruit_midi.control_change import ControlChange
import digitalio import digitalio
import analogio import analogio
from board import * # import busio
import board
import time
# Devices # Devices
exp = analogio.AnalogIn(A0) # Expression pedal exp = analogio.AnalogIn(board.A0) # Expression pedal
led = digitalio.DigitalInOut(LED) led = digitalio.DigitalInOut(board.LED)
# led = Pin(25, Pin.OUT)
# Expression pedal settings # Expression pedal settings
exp_min = 0 # Expression pedal minimum value exp_min = 0 # Expression pedal minimum value
@@ -25,13 +28,23 @@ def translate(exp_val):
return int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min) return int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min)
midi = adafruit_midi.MIDI(midi_out=usb_midi.ports[1], out_channel=midi_channel) midi = adafruit_midi.MIDI(midi_out=usb_midi.ports[1], out_channel=midi_channel)
# uart = busio.UART(board.GP4, board.GP5, baudrate=31250)
# midi = adafruit_midi.MIDI(midi_out=uart, out_channel=midi_channel)
cc_val_last = 0 cc_val_last = 0
led.switch_to_output(value=True) led.switch_to_output(value=True)
while True: while True:
cc_val = translate(exp.value) # cc_val = translate(exp.value)
if cc_val != cc_val_last: # if cc_val != cc_val_last:
led.switch_to_output(value=False) # Flicker led # led.switch_to_output(value=False) # Flicker led
midi.send(ControlChange(cc, cc_val)) # Write midi # midi.send(ControlChange(cc, cc_val)) # Write midi
# led.switch_to_output(value=True)
# cc_val_last = cc_val
for i in range(100):
led.switch_to_output(value=True) led.switch_to_output(value=True)
cc_val_last = cc_val midi.send(ControlChange(cc, i))
led.switch_to_output(value=False)
time.sleep(0.05)