import struct import select """ Init: 8 = init? Time stamp | (ms since boot) | --+--+--+-- | -- Button number f0 fb 37 09 00 00 81 00 f0 fb 37 09 00 00 81 01 f0 fb 37 09 00 00 81 02 f0 fb 37 09 00 00 81 03 f0 fb 37 09 00 00 81 04 f0 fb 37 09 00 00 81 05 f0 fb 37 09 00 00 81 06 f0 fb 37 09 00 00 81 07 f0 fb 37 09 00 00 81 08 f0 fb 37 09 00 00 81 09 f0 fb 37 09 00 00 81 0a f0 fb 37 09 00 00 81 0b f0 fb 37 09 00 00 82 00 f0 fb 37 09 00 00 82 01 f0 fb 37 09 00 00 82 02 f0 fb 37 09 00 00 82 03 f0 fb 37 09 00 00 82 04 f0 fb 37 09 00 00 82 05 --+-- | | 1 = button, 2 = | value (little endian unsigned) button down | 98 f0 2f 09 01 00 01 00 1 down 08 fa 2f 09 00 00 01 00 1 up 2c 6a 31 09 01 00 01 01 2 down 04 73 31 09 00 00 01 01 2 up 48 bf 32 09 01 00 01 02 3 down f8 c4 32 09 00 00 01 02 3 up Logitech PS2-style gamepad: axis 0 == left stick -left / right (left is negative) axis 1 == left stick -up / down (up is negative) axis 2 == right stick -left / right axis 3 == right stick -up / down axis 4 == plus stick -left / right (when mode is off), values min/0/max axis 5 == plus stick -up / down (when mode is off, values min/0/max The + stick has two modes. When the mode light is off, it sends axis 4/5. When mode is on, it sends axis 0/1. The values are -32767, 0, and 32767. Other axis have values from -32767 to 32767 as well. """ JS_EVENT_BUTTON = 0x1 JS_EVENT_AXIS = 0x2 JS_EVENT_INIT = 0x80 def read_event(device): data = device.read(8) event = {} (event['time'], event['value'], event['type'], event['number']) = struct.unpack('IhBB', data) event['init'] = bool(event['type'] & JS_EVENT_INIT) event['type'] &= 0x7f # Strip away the flag bits (JS_EVENT_INIT etc.) if event['type'] != JS_EVENT_BUTTON: event['normalized_value'] = \ float(event['value']) / 0x7fff # Normalize to -1..1 event['type'] = {1: 'button', 2: 'axis'}[event['type']] return event def read_events(device_name): with open(device_name, 'rb') as device: while True: yield read_event(device) def panic(port): """ Send "All Notes Off" and "Reset All Controllers" on all channels. """ for channel in range(16): for control in [121, 123]: message = mido.Message('control_change', channel=channel, control=control, value=0) print(message) port.send(message) class Monophonic: # Todo: this assumes everything is on channel 0! def __init__(self, output, channel=0): self.output = output self.notes = set() self.current_note = None self.channel = channel def send(self, message): if message.type not in ['note_on', 'note_off'] or \ message.channel != self.channel: self.output.send(message) return if message.type == 'note_on': self.notes.add(message.note) elif message.type == 'note_off': if message.note in self.notes: self.notes.remove(message.note) print(self.notes) try: note = min(self.notes) except ValueError: note = None if note == self.current_note: return # Same note as before, no change. if self.current_note is not None: off = mido.Message('note_off', note=self.current_note, velocity=message.velocity) print(off) self.output.send(off) self.current_note = None if note is not None: on = mido.Message('note_on', note=note, velocity=message.velocity) print(on) self.output.send(on) self.current_note = note def play_scale(dev, out): # out = Monophonic(out, channel=0) # Major scale. scale = [0, 2, 4, 5, 7, 9, 11, 12, 14, 16, 17, 19] # program = 16 # Organ program = 74 out.send(mido.Message('program_change', program=program)) while True: event = read_event(dev) if event['init']: continue # Skip init events. if event['type'] == 'button': # Convert to D-major scale starting at middle D. note = 62 + 12 + scale[event['number']] if event['value']: type_ = 'note_on' else: type_ = 'note_off' message = mido.Message(type_, note=note, velocity=64) out.send(message) # elif event['type'] == 'axis': # if event['number'] == 0: # pitch_scale = mido.messages.MAX_PITCHWHEEL # pitch = int(event['normalized_value'] * pitch_scale) # out.send(mido.Message('pitchwheel', pitch=pitch)) def play_drums(dev, out): # http://www.midi.org/techspecs/gm1sound.php note_mapping = { 2: 35, # Acoustic Bass Drum 6: 38, # Acoustic Snare 1: 41, # Low Floor Tom 4: 47, # Low Mid Tom 3: 50, # High Tom 8: 51, # Ride Cymbal 5: 42, # Closed Hi Hat 7: 46, # Open Hi Hat 9: 52, # Chinese Cymbal 10: 55, # Splash Cymbal } while True: event = read_event(dev) if event['init']: continue if event['type'] == 'button': print(event) button = event['number'] + 1 # Number buttons starting with 1. if button not in note_mapping: continue if event['value']: type_ = 'note_on' else: type_ = 'note_off' note = note_mapping[button] message = mido.Message(type_, channel=9, note=note, velocity=64) print(message) out.send(message) if __name__ == '__main__': import sys import mido with open('/dev/input/js0') as dev: with mido.open_output('SD-20 Part A') as out: try: # play_drums(dev, out) play_scale(dev, out) finally: panic(out)