├── .gitignore ├── LICENSE ├── README.md ├── arduino ├── keypad_test_adafruit │ └── keypad_test_adafruit.ino ├── midi_test │ └── midi_test.ino └── mozzi_test │ └── mozzi_test.ino ├── circuitpython ├── breakbeatmixer_wav │ ├── amen_4bar_22k16b.wav │ ├── amen_bitA_22k16b.wav │ ├── amen_bitB_22k16b.wav │ ├── amen_bitC_22k16b.wav │ ├── amen_bitD_22k16b.wav │ ├── amen_bitE_22k16b.wav │ └── amen_bitF_22k16b.wav ├── code_plinkykeeb_midiout.py ├── code_plinkykeeb_sampleplayer.py ├── code_plinkykeeb_test1.py ├── code_plinkykeeb_test2.py ├── plinkykeeb_breakbeatmixer.py └── wav │ ├── 909clap1.wav │ ├── 909cym2.wav │ ├── 909hatclosed2.wav │ ├── 909hatopen5.wav │ ├── 909kick4.wav │ ├── 909snare2.wav │ ├── amen1_22k_s16.wav │ ├── amen2_22k_s16.wav │ ├── amen3_22k_s16.wav │ ├── amen4_22k_s16.wav │ ├── amen5_22k_s16.wav │ ├── amen6_22k_s16.wav │ ├── amen7_22k_s16.wav │ ├── amen8_22k_s16.wav │ ├── amenfull_22k_s16.wav │ ├── dnb21575_22k16b_160bpm.wav │ ├── guit1403_22k16b_160bpm.wav │ ├── laser2.wav │ ├── ohohoh_22k16b_160bpm.wav │ ├── readme.txt │ └── secretguit_22k16b_160bpm.wav ├── docs ├── plinkykeeb_21Jan2022.jpg ├── plinkykeeb_21Jan2022_built.jpg ├── plinkykeeb_choc.jpg └── plinkykeeb_comparison.jpg └── hardware ├── case ├── README.md ├── plinkykeeb_21Jan2022_bottom.stl └── plinkykeeb_21Jan2022_top.stl ├── plinkykeeb_21Jan2022.brd ├── plinkykeeb_21Jan2022.sch ├── plinkykeeb_21Jan2022_sch.pdf ├── plinkykeeb_choc_12Feb2022.brd └── plinkykeeb_choc_12Feb2022.sch /.gitignore: -------------------------------------------------------------------------------- 1 | # Ignore list for Eagle, a PCB layout tool 2 | 3 | # Backup files 4 | *.s#? 5 | *.b#? 6 | *.l#? 7 | *.b$? 8 | *.s$? 9 | *.l$? 10 | 11 | # Eagle project file 12 | # It contains a serial number and references to the file structure 13 | # on your computer. 14 | # comment the following line if you want to have your project file included. 15 | eagle.epf 16 | 17 | # Autorouter files 18 | *.pro 19 | *.job 20 | 21 | # CAM files 22 | *.$$$ 23 | *.cmp 24 | *.ly2 25 | *.l15 26 | *.sol 27 | *.plc 28 | *.stc 29 | *.sts 30 | *.crc 31 | *.crs 32 | 33 | *.dri 34 | *.drl 35 | *.gpi 36 | *.pls 37 | *.ger 38 | *.xln 39 | 40 | *.drd 41 | *.drd.* 42 | 43 | *.s#* 44 | *.b#* 45 | 46 | *.info 47 | 48 | *.eps 49 | 50 | # file locks introduced since 7.x 51 | *.lck 52 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # plinkykeeb 2 | 3 | Simple MIDI controller using KB2040 and computer key switches, in Cherry MX or Kailh Choc versions 4 | 5 | 6 | 7 | 8 | 9 | Also see: https://twitter.com/todbot/status/1492324272714366980__ 10 | 11 | And this demo video: 12 | 13 | https://user-images.githubusercontent.com/274093/153778157-13a1d3d5-e82a-40dc-8635-7ddb3dfab898.mp4 14 | 15 | Comparison in heights: 16 | 17 | -------------------------------------------------------------------------------- /arduino/keypad_test_adafruit/keypad_test_adafruit.ino: -------------------------------------------------------------------------------- 1 | // keypad_test_adafruit -- test plinkykeeb with Adafruit_Keypad library 2 | // 5 Feb 2022 - @todbot / Tod Kurt 3 | // 4 | 5 | #include 6 | 7 | // note the Row/Col sense is backwards from CircuitPython and the schematic 8 | const byte ROWS = 5; 9 | const byte COLS = 4; 10 | // and since the row/col sense is flipped, so are the keycodes. sigh 11 | char keys[ROWS][COLS] = { 12 | {0, 5, 10, 15}, 13 | {1, 6, 11, 16}, 14 | {2, 7, 12, 17}, 15 | {3, 8, 13, 18}, 16 | {4, 9, 14, 19}, 17 | }; 18 | 19 | byte rowPins[ROWS] = {2, 3, 4, 5, 6}; 20 | byte colPins[COLS] = {7, 8, 9, 10}; 21 | 22 | Adafruit_Keypad customKeypad = Adafruit_Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); 23 | 24 | void setup() { 25 | Serial.begin(115200); 26 | customKeypad.begin(); 27 | } 28 | 29 | uint32_t lastMillis; 30 | 31 | void loop() { 32 | 33 | customKeypad.tick(); 34 | 35 | while(customKeypad.available()){ 36 | keypadEvent e = customKeypad.read(); 37 | Serial.printf("%d %d/%d \n", e.bit.KEY, 38 | e.bit.EVENT==KEY_JUST_PRESSED, e.bit.EVENT==KEY_JUST_RELEASED); 39 | } 40 | 41 | if( millis() - lastMillis > 1000 ) { 42 | lastMillis = millis(); 43 | Serial.println("helloooo"); 44 | } 45 | 46 | delay(1); 47 | } 48 | -------------------------------------------------------------------------------- /arduino/midi_test/midi_test.ino: -------------------------------------------------------------------------------- 1 | /** 2 | * midi_test -- test plinkykeeb midi output 3 | * 5 Feb 2022 - @todbot / Tod Kurt 4 | * 5 | * Libraries needed: (avail via Library Manager) 6 | * - Adafruit TinyUSB library - https://github.com/adafruit/Adafruit_TinyUSB_Arduino/ 7 | * - MIDI Library - https://github.com/FortySevenEffects/arduino_midi_library/ 8 | * 9 | * Board config: 10 | * - Use the RP2040 Arduino core at: https://github.com/earlephilhower/arduino-pico 11 | * - Set board "KB2040" 12 | * - Set "Tools" -> "USB Stack" -> "TinyUSB" 13 | * 14 | */ 15 | 16 | #include 17 | #include 18 | #include 19 | 20 | Adafruit_USBD_MIDI usb_midi; 21 | MIDI_CREATE_INSTANCE(Adafruit_USBD_MIDI, usb_midi, MIDIusb); // USB MIDI 22 | MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDIserial); // classic midi over RX/TX 23 | 24 | // note the Row/Col sense is backwards from CircuitPython and the schematic 25 | const byte ROWS = 5; 26 | const byte COLS = 4; 27 | // and since the row/col sense is flipped, so are the keycodes. sigh 28 | char keys[ROWS][COLS] = { 29 | {0, 5, 10, 15}, 30 | {1, 6, 11, 16}, 31 | {2, 7, 12, 17}, 32 | {3, 8, 13, 18}, 33 | {4, 9, 14, 19}, 34 | }; 35 | 36 | byte rowPins[ROWS] = {2, 3, 4, 5, 6}; 37 | byte colPins[COLS] = {7, 8, 9, 10}; 38 | 39 | Adafruit_Keypad keypad = Adafruit_Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); 40 | 41 | uint8_t note_base = 48; 42 | uint8_t note_vel = 127; 43 | uint8_t note_chan = 1; 44 | 45 | uint32_t lastMillis; 46 | 47 | void setup() { 48 | Serial.begin(115200); 49 | keypad.begin(); 50 | MIDIusb.begin(MIDI_CHANNEL_OMNI); 51 | MIDIserial.begin(MIDI_CHANNEL_OMNI); 52 | Serial.begin(115200); 53 | MIDIusb.turnThruOff(); 54 | MIDIserial.turnThruOff(); 55 | } 56 | 57 | void loop() { 58 | 59 | keypad.tick(); 60 | 61 | while(keypad.available()){ 62 | keypadEvent e = keypad.read(); 63 | Serial.printf("%d %d/%d \n", e.bit.KEY, 64 | e.bit.EVENT==KEY_JUST_PRESSED, e.bit.EVENT==KEY_JUST_RELEASED); 65 | 66 | uint8_t note = note_base + e.bit.KEY; 67 | if( e.bit.EVENT == KEY_JUST_PRESSED ) { 68 | MIDIusb.sendNoteOn(note, note_vel, note_chan); 69 | MIDIserial.sendNoteOn(note, note_vel, note_chan); 70 | } 71 | if( e.bit.EVENT == KEY_JUST_RELEASED ) { 72 | MIDIusb.sendNoteOn(note, 0, note_chan); // note on w/ 0 vel == note off 73 | MIDIserial.sendNoteOn(note, note_vel, 0); 74 | } 75 | } 76 | 77 | if( millis() - lastMillis > 1000 ) { 78 | lastMillis = millis(); 79 | Serial.println("still alive, despite your best efforts"); 80 | } 81 | 82 | delay(1); 83 | } 84 | -------------------------------------------------------------------------------- /arduino/mozzi_test/mozzi_test.ino: -------------------------------------------------------------------------------- 1 | /** 2 | * mozzi_test -- test plinkykeeb mozzi synth audio output 3 | * 24 Feb 2022 - @todbot / Tod Kurt 4 | * 5 | * Libraries needed: (avail via Library Manager) 6 | * - Adafruit TinyUSB library - https://github.com/adafruit/Adafruit_TinyUSB_Arduino/ 7 | * - MIDI Library - https://github.com/FortySevenEffects/arduino_midi_library/ 8 | * - Mozzi library - https://github.com/pschatzmann/Mozzi 9 | * 10 | * Compiling: 11 | * - Use the RP2040 Arduino core at: https://github.com/earlephilhower/arduino-pico 12 | * - Use the Mozzi fork at https://github.com/pschatzmann/Mozzi 13 | * - For slightly better audio quality, add the following after "#define PWM_RATE" 14 | * in "Mozzi/AudioConfigRP2040.h" 15 | * #define AUDIO_BITS 10 16 | * #define AUDIO_BIAS ((uint16_t) 512) 17 | * #define PWM_RATE (60000*2) 18 | * 19 | * Board config: 20 | * - Use the RP2040 Arduino core at: https://github.com/earlephilhower/arduino-pico 21 | * - Set board "KB2040" 22 | * - Set "Tools" -> "USB Stack" -> "TinyUSB" 23 | * 24 | */ 25 | 26 | #include 27 | #include 28 | #include 29 | #include 30 | 31 | #include 32 | #include 33 | #include // oscillator waveform 34 | #include // filter modulation waveform 35 | #include 36 | #include 37 | #include 38 | #include // for mtof() 39 | 40 | const int NUM_OSCS = 3; 41 | 42 | const int LED_PIN = 20; // RP2040 GPIO20 / KB2040 "MISO" pin 43 | const int NUM_LEDS = 20; 44 | 45 | Oscil aOscs [NUM_OSCS]; 46 | Oscil kFilterMod (COS2048_DATA); // filter mod 47 | Portamento portamentos[NUM_OSCS]; 48 | ADSR envelope; 49 | LowPassFilter lpf; 50 | 51 | uint8_t resonance = 120; // range 0-255, 255 is most resonant 52 | uint8_t cutoff = 70; 53 | float mod_amount = 0.5; // filter mods 54 | int portamento_time = 100; // milliseconds 55 | int env_release_time = 1000; // milliseconds 56 | 57 | Adafruit_USBD_MIDI usb_midi; 58 | MIDI_CREATE_INSTANCE(Adafruit_USBD_MIDI, usb_midi, MIDIusb); // USB MIDI 59 | MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDIserial); // classic midi over RX/TX 60 | 61 | Adafruit_NeoPixel leds(NUM_LEDS,LED_PIN, NEO_GRB + NEO_KHZ800); 62 | 63 | // note the Row/Col sense is backwards from CircuitPython and the schematic 64 | const byte ROWS = 5; 65 | const byte COLS = 4; 66 | // and since the row/col sense is flipped, so are the keycodes. sigh 67 | char keys[ROWS][COLS] = { 68 | {0, 5, 10, 15}, 69 | {1, 6, 11, 16}, 70 | {2, 7, 12, 17}, 71 | {3, 8, 13, 18}, 72 | {4, 9, 14, 19}, 73 | }; 74 | 75 | byte rowPins[ROWS] = {2, 3, 4, 5, 6}; 76 | byte colPins[COLS] = {7, 8, 9, 10}; 77 | 78 | Adafruit_Keypad keypad = Adafruit_Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); 79 | 80 | uint8_t note_base = 36; 81 | uint8_t note_vel = 127; 82 | uint8_t note_chan = 1; 83 | 84 | uint32_t lastMillis; 85 | 86 | void setup() { 87 | Serial.begin(115200); 88 | 89 | Mozzi.setPin(0,1); // this sets RP2040 GP1 / KB2040 "RX" 90 | 91 | lpf.setCutoffFreqAndResonance(cutoff, resonance); 92 | kFilterMod.setFreq(0.5f); // slow 93 | for( int i=0; i 1000 ) { 191 | lastMillis = millis(); 192 | Serial.println("still alive, despite your best efforts"); 193 | } 194 | 195 | } 196 | 197 | // mozzi function, called every AUDIO_RATE to output sample 198 | AudioOutput_t updateAudio() { 199 | long asig = (long) 0; 200 | for( int i=0; i led_millis: 58 | led_last_update_millis = now 59 | for i in keys_pressed: # light up those keys that are pressed 60 | leds[ i ] = rainbowio.colorwheel( int(time.monotonic() * 20) ) 61 | dim_leds_by(leds, 250) # fade everyone out slowly 62 | leds.show() 63 | 64 | if spin_hue: 65 | hue = (time.monotonic() * 100 ) % 256 66 | leds.fill( rainbowio.colorwheel( int(hue) ) ) 67 | 68 | event = km.events.get() 69 | if event: 70 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 71 | #print("\t\t", dir(event)) 72 | 73 | if event.key_number < 17: 74 | note_base = octave * 12 75 | note_val = event.key_number + note_base 76 | 77 | if event.pressed: 78 | noteon = NoteOn(note_val, note_velocity) 79 | print("note on:",note_val) 80 | midi_serial.send( noteon ) 81 | midi_usb.send( noteon ) 82 | leds[ event.key_number ] = rainbowio.colorwheel( time.monotonic() * 20 ) 83 | keys_pressed.append( event.key_number ) 84 | 85 | if event.released: 86 | noteoff = NoteOn(note_val, 0) 87 | midi_serial.send( noteoff ) 88 | midi_usb.send( noteoff ) 89 | keys_pressed.remove( event.key_number ) 90 | else: 91 | spin_hue = event.pressed 92 | if event.key_number == 19: # octave up/dn enable 93 | oct_switch = event.pressed 94 | 95 | # this is dumb, pitch up should be +8191, pitch middle 0, pitch down -8192 96 | 97 | if event.key_number == 18: # pitchbend up 98 | if event.pressed and oct_switch: 99 | octave = octave+1 100 | else: 101 | pb_val = PitchBend(16383) if event.pressed else PitchBend(8192) 102 | midi_serial.send( pb_val ) 103 | midi_usb.send( pb_val ) 104 | if event.key_number == 17: # pitchbend down 105 | if event.pressed and oct_switch: 106 | octave = octave-1 107 | else: 108 | pb_val = PitchBend(0) if event.pressed else PitchBend(8192) 109 | midi_serial.send( pb_val ) 110 | midi_usb.send( pb_val ) 111 | -------------------------------------------------------------------------------- /circuitpython/code_plinkykeeb_sampleplayer.py: -------------------------------------------------------------------------------- 1 | # plinkykeeb_sampleplayer.py - play multiple samples concurrently, some looped, some not 2 | # 3 | # 5 Feb 2022 - @todbot / Tod Kurt - https://github.com/todbot/plinkykeeb 4 | # 5 | # Copy this file as "code.py" to your CIRCUITPY drive 6 | # Install "neopixel" library with "circup install neopixel" 7 | # 8 | # Convert files to appropriate WAV format (mono, 22050 Hz, 16-bit signed) with command: 9 | # sox loop.mp3 -b 16 -c 1 -r 22050 loop.wav 10 | # or try: 11 | # ffmpeg -i loop.mp3 -ac 1 -ar 22050 loop.wav (but I think this needs codec spec'd 12 | # 13 | 14 | print("plinkykeeb_sampleplayer!") 15 | 16 | import time 17 | import board 18 | import keypad 19 | import neopixel 20 | import rainbowio 21 | import supervisor 22 | 23 | import audiocore 24 | import audiomixer 25 | from audiopwmio import PWMAudioOut as AudioOut 26 | 27 | # map key number to wave file 28 | # a list of which samples to play on which keys, 29 | # and if the sample should loop or not 30 | # if a key has no sample, use (None,None) 31 | wav_files = ( 32 | # filename, loop? 33 | ('wav/909kick4.wav', False), # C 34 | ('wav/909clap1.wav', False), # C# 35 | ('wav/909snare2.wav', False), # D 36 | ('wav/909cym2.wav', False), # D# 37 | (None, None), # E 38 | (None, None), # F 39 | ('wav/909hatclosed2.wav', False), # F# 40 | (None, None), # G 41 | ('wav/909hatopen5.wav', False), # G# 42 | (None, None), # A 43 | (None, None), # A# 44 | (None, None), # B 45 | ('wav/amenfull_22k_s16.wav', True), # C 46 | ('wav/amen1_22k_s16.wav', True), # C# 47 | ('wav/ohohoh2.wav', True), # D 48 | ('wav/amen2_22k_s16.wav', True), # D# 49 | (None, None), # E 50 | ) 51 | 52 | leds = neopixel.NeoPixel(board.MISO, 20, brightness=0.2, auto_write=False) 53 | 54 | # wait a little bit, with a light show 55 | # so USB can stabilize and not garble & glitch audio 56 | for i in range(0,300): 57 | leds.fill( rainbowio.colorwheel(i) ); 58 | leds.show() 59 | time.sleep(0.01) 60 | print("ready to go!") 61 | 62 | # pins used by keyboard 63 | row_pins = (board.D7, board.D8, board.D9, board.D10) 64 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 65 | 66 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 67 | 68 | audio = AudioOut( board.RX ) 69 | mixer = audiomixer.Mixer(voice_count=len(wav_files), sample_rate=22050, channel_count=1, 70 | bits_per_sample=16, samples_signed=True) 71 | audio.play(mixer) # attach mixer to audio playback 72 | 73 | # # load all the wavs into RAM 74 | # wavs = [None] * len(wav_files) 75 | # for i in range(len(wavs)): 76 | # (wav_file, loopit) = wav_files[i] 77 | # if wav_file is not None: 78 | # wavs[i] = audiocore.WaveFile(open(wav_file,"rb")) 79 | 80 | # # play or stop a RAM WAV sample using the mixer 81 | # def handle_sample_wavs(num, pressed): 82 | # voice = mixer.voice[num] # get mixer voice 83 | # (wav_file, loopit) = wav_files[num] 84 | # if pressed: 85 | # if wav_file is not None: 86 | # voice.play(wavs[num],loop=loopit) 87 | # else: # released 88 | # if loopit: 89 | # voice.stop() # only stop looping samples, others one-shot 90 | 91 | # play or stop a sample using the mixer 92 | def handle_sample(num, pressed): 93 | voice = mixer.voice[num] # get mixer voice 94 | (wav_file, loopit) = wav_files[num] 95 | if pressed: 96 | if wav_file is not None: 97 | wave = audiocore.WaveFile(open(wav_file,"rb")) 98 | voice.play(wave,loop=loopit) 99 | else: # released 100 | if loopit: 101 | voice.stop() # only stop looping samples, others one-shot 102 | 103 | 104 | # I like millis 105 | def millis(): return supervisor.ticks_ms() 106 | 107 | # scale a value by amount/256, expects an int, returns an int 108 | def scale8(val,amount): 109 | return (val*amount)//256 110 | # dim all leds by an (amount/256) 111 | def dim_leds_by(leds, amount): 112 | leds[0:] = [[max(scale8(i,amount),0) for i in l] for l in leds] 113 | 114 | leds.fill(0x333333) 115 | 116 | led_last_update_millis = 0 117 | led_millis = 5 118 | 119 | keys_pressed = [] # list of keys currently being pressed down 120 | while True: 121 | now = millis() 122 | 123 | # update the LEDs, but only if keys pressed 124 | if now - led_last_update_millis > led_millis: 125 | led_last_update_millis = now 126 | for i in keys_pressed: # light up those keys that are pressed 127 | leds[ i ] = rainbowio.colorwheel( int(time.monotonic() * 20) ) 128 | dim_leds_by(leds, 250) # fade everyone out slowly 129 | leds.show() 130 | 131 | event = km.events.get() 132 | 133 | if event: 134 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 135 | 136 | if event.key_number < len(wav_files): 137 | if event.pressed: 138 | handle_sample( event.key_number, True ) 139 | keys_pressed.append( event.key_number ) 140 | 141 | if event.released: 142 | handle_sample( event.key_number, False ) 143 | keys_pressed.remove( event.key_number ) 144 | -------------------------------------------------------------------------------- /circuitpython/code_plinkykeeb_test1.py: -------------------------------------------------------------------------------- 1 | 2 | print("Hello World plinkykeeb!") 3 | 4 | import board 5 | import keypad 6 | 7 | row_pins = (board.D7, board.D8, board.D9, board.D10) 8 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 9 | 10 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 11 | 12 | while True: 13 | event = km.events.get() 14 | if event: 15 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 16 | #print("\t\t", dir(event)) 17 | 18 | 19 | 20 | -------------------------------------------------------------------------------- /circuitpython/code_plinkykeeb_test2.py: -------------------------------------------------------------------------------- 1 | # code_plinkykeeb_test2.py -- test keys + neopixels 2 | # 5 Feb 2022 - @todbot / Tod Kurt 3 | # 4 | 5 | import time 6 | import board 7 | import keypad 8 | import neopixel 9 | import rainbowio 10 | 11 | print("plinkykeeb test2!") 12 | 13 | leds = neopixel.NeoPixel(board.MISO, 20, brightness=0.2, auto_write=False) 14 | 15 | row_pins = (board.D7, board.D8, board.D9, board.D10) 16 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 17 | 18 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 19 | 20 | # scale a value by amount/256, expects an int, returns an int 21 | def scale8(val,amount): 22 | return (val*amount)//256 23 | # dim all leds by an (amount/256) 24 | def dim_leds_by(leds, amount): 25 | leds[0:] = [[max(scale8(i,amount),0) for i in l] for l in leds] 26 | 27 | leds.fill( rainbowio.colorwheel(60) ) 28 | leds.show() 29 | time.sleep(1) 30 | 31 | spin_hue = False 32 | 33 | while True: 34 | dim_leds_by(leds, 250) 35 | leds.show() 36 | 37 | if spin_hue: 38 | hue = (time.monotonic() * 100 ) % 256 39 | print(hue) 40 | leds.fill( rainbowio.colorwheel( hue ) ) 41 | leds.show() 42 | 43 | event = km.events.get() 44 | 45 | if event: 46 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 47 | leds[ event.key_number ] = rainbowio.colorwheel( time.monotonic() * 20 ) 48 | 49 | if event.key_number == 19: 50 | spin_hue = event.pressed 51 | 52 | 53 | -------------------------------------------------------------------------------- /circuitpython/plinkykeeb_breakbeatmixer.py: -------------------------------------------------------------------------------- 1 | # plinkykeeb_breakbeatmixer.py -- use CircuitPython mixer level to remix amen break 2 | # 16 Mar 2022 - @todbot / Tod Kurt, from @jedgarparks' idea 3 | # 4 | # Uses pin defs from plinkykeeb but will work on other RP2040 CircuitPython boards 5 | # 6 | import time 7 | import board 8 | import keypad 9 | import busio 10 | import neopixel 11 | import rainbowio 12 | 13 | import audiocore 14 | import audiomixer 15 | from audiopwmio import PWMAudioOut as AudioOut 16 | 17 | time.sleep(3) 18 | 19 | wav_files = ( 20 | 'wav/amen_4bar_22k16b.wav', # 137.72 bpm 21 | 'wav/amen_bitA_22k16b.wav', 22 | 'wav/amen_bitB_22k16b.wav', 23 | 'wav/amen_bitC_22k16b.wav', 24 | 'wav/amen_bitD_22k16b.wav', 25 | 'wav/amen_bitE_22k16b.wav', 26 | 'wav/amen_bitF_22k16b.wav', 27 | ) 28 | num_voices = len(wav_files) 29 | 30 | leds = neopixel.NeoPixel(board.MISO, 20, brightness=0.2, auto_write=True) 31 | 32 | row_pins = (board.D7, board.D8, board.D9, board.D10) 33 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 34 | 35 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 36 | 37 | audio = AudioOut( board.RX ) 38 | mixer = audiomixer.Mixer(voice_count=num_voices, sample_rate=22050, channel_count=1, 39 | bits_per_sample=16, samples_signed=True) 40 | audio.play(mixer) # attach mixer to audio playback 41 | 42 | for i in range(num_voices): # test start all samples at once for use w handle_mixer 43 | print("loading wav:", wav_files[i]) 44 | wave = audiocore.WaveFile(open(wav_files[i],"rb")) 45 | mixer.voice[i].play(wave, loop=True) 46 | mixer.voice[i].level = 0 47 | 48 | def handle_mixer(num, pressed): 49 | voice = mixer.voice[num] # get mixer voice 50 | if pressed: 51 | voice.level = 1.0 52 | else: # released 53 | voice.level = 0 54 | 55 | print("running") 56 | 57 | while True: 58 | leds.fill( rainbowio.colorwheel( int(time.monotonic() * 20) ) ) 59 | 60 | event = km.events.get() 61 | 62 | if event: 63 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 64 | 65 | if event.key_number < num_voices: 66 | if event.pressed: 67 | handle_mixer(event.key_number, True) 68 | if event.released: 69 | handle_mixer( event.key_number, False ) 70 | 71 | 72 | 73 | ######################3 74 | 75 | import time 76 | import math 77 | import array 78 | import board 79 | import keypad 80 | import busio 81 | import neopixel 82 | import rainbowio 83 | 84 | import audiocore 85 | import audiomixer 86 | from audiopwmio import PWMAudioOut as AudioOut 87 | 88 | time.sleep(3) 89 | 90 | num_voices = 24 91 | 92 | leds = neopixel.NeoPixel(board.MISO, 20, brightness=0.2, auto_write=False) 93 | 94 | row_pins = (board.D7, board.D8, board.D9, board.D10) 95 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 96 | 97 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 98 | 99 | audio = AudioOut( board.RX ) 100 | mixer = audiomixer.Mixer(voice_count=num_voices, sample_rate=22050, channel_count=1, 101 | bits_per_sample=16, samples_signed=False) 102 | audio.play(mixer) # attach mixer to audio playback 103 | 104 | freqs = ( 105 | 65.4064, 69.2957, 73.4162, 77.7817, 106 | 82.4069, 87.3071, 92.4986, 97.9989, 103.8262, 110.0000, 116.5409, 123.4708, 107 | 130.8128, 138.5913, 146.8324, 155.5635, 164.8138, 174.6141, 184.9972, 195.9977, 108 | 207.6523, 220.0000, 233.0819, 246.9417, 261.6256, 277.1826, 293.6648, 311.1270, 109 | 329.6276, 349.2282, 369.9944, 391.9954, 415.3047, 440.0000, 110 | ) 111 | 112 | tone_volume = 0.5 113 | frequency = 440 # Set this to the Hz of the tone you want to generate. 114 | length = 22050 // frequency 115 | sine_wave = array.array("H", [0] * length) 116 | 117 | for i in range(length): 118 | sine_wave[i] = int((1 + math.sin(math.pi * 2 * i / length)) * tone_volume * (2 ** 15 - 1)) 119 | 120 | sine_wave_sample = audiocore.RawSample(sine_wave, sample_rate=22050) 121 | 122 | #mixer.voice[0].play(sine_wave_sample, loop=True) 123 | 124 | def millis(): return time.monotonic()*1000 125 | 126 | print("ready!") 127 | 128 | decaying = False 129 | 130 | while True: 131 | now = millis() 132 | 133 | if decaying: 134 | l = mixer.voice[0].level 135 | if l == 0: 136 | decaying = False 137 | else: 138 | mixer.voice[0].level = max(l - 0.001, 0) 139 | 140 | while km.events: 141 | event = km.events.get() 142 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 143 | if event.pressed: 144 | pass 145 | if event.released: 146 | pass 147 | 148 | # event = km.events.get() 149 | # if event: 150 | # print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 151 | # if event.pressed: 152 | # #mixer.voice[ 0 ].level = 1.0 153 | # if event.released: 154 | # decaying = True 155 | # #mixer.voice[ 0 ].level = 0.0 156 | 157 | 158 | 159 | 160 | 161 | 162 | 163 | # plinkykeeb_midiout.py - send MIDI out via USB or serial 164 | # 165 | # 4 Feb 2022 - @todbot / Tod Kurt - https://github.com/todbot/plinkykeeb 166 | # 167 | 168 | print("plinkykeeb_midiout!") 169 | 170 | import time 171 | import board 172 | import keypad 173 | import busio 174 | import neopixel 175 | import rainbowio 176 | import usb_midi 177 | import adafruit_midi 178 | from adafruit_midi.note_on import NoteOn 179 | from adafruit_midi.pitch_bend import PitchBend 180 | 181 | # config 182 | octave = 3 183 | note_velocity = 127 184 | 185 | leds = neopixel.NeoPixel(board.MISO, 20, brightness=0.2, auto_write=False) 186 | 187 | midi_uart = busio.UART(tx=board.TX, rx=None, baudrate=31250 ) # timeout=0.01) 188 | midi_serial = adafruit_midi.MIDI(midi_out=midi_uart) 189 | midi_usb = adafruit_midi.MIDI( midi_in=usb_midi.ports[0], 190 | midi_out=usb_midi.ports[1] ) 191 | 192 | row_pins = (board.D7, board.D8, board.D9, board.D10) 193 | col_pins = (board.D2, board.D3, board.D4, board.D5, board.D6) 194 | 195 | km = keypad.KeyMatrix( row_pins=row_pins, column_pins=col_pins ) 196 | 197 | # I like millis 198 | def millis(): return time.monotonic()*1000 199 | 200 | # scale a value by amount/256, expects an int, returns an int 201 | def scale8(val,amount): 202 | return (val*amount)//256 203 | # dim all leds by an (amount/256) 204 | def dim_leds_by(leds, amount): 205 | leds[0:] = [[max(scale8(i,amount),0) for i in l] for l in leds] 206 | 207 | spin_hue = False 208 | oct_switch = False 209 | 210 | led_last_update_millis = 0 211 | led_millis = 5 212 | 213 | keys_pressed = [] # list of keys currently being pressed down 214 | 215 | while True: 216 | now = millis() 217 | 218 | # update the LEDs, but only if keys pressed 219 | if now - led_last_update_millis > led_millis: 220 | led_last_update_millis = now 221 | for i in keys_pressed: # light up those keys that are pressed 222 | leds[ i ] = rainbowio.colorwheel( int(time.monotonic() * 20) ) 223 | dim_leds_by(leds, 250) # fade everyone out slowly 224 | leds.show() 225 | 226 | if spin_hue: 227 | hue = (time.monotonic() * 100 ) % 256 228 | leds.fill( rainbowio.colorwheel( int(hue) ) ) 229 | 230 | event = km.events.get() 231 | if event: 232 | print("key:%d %d/%d %d" % (event.key_number, event.pressed, event.released, event.timestamp) ) 233 | #print("\t\t", dir(event)) 234 | 235 | if event.key_number < 17: 236 | note_base = octave * 12 237 | note_val = event.key_number + note_base 238 | 239 | if event.pressed: 240 | noteon = NoteOn(note_val, note_velocity) 241 | print("note on:",note_val) 242 | midi_serial.send( noteon ) 243 | midi_usb.send( noteon ) 244 | leds[ event.key_number ] = rainbowio.colorwheel( time.monotonic() * 20 ) 245 | keys_pressed.append( event.key_number ) 246 | 247 | if event.released: 248 | noteoff = NoteOn(note_val, 0) 249 | midi_serial.send( noteoff ) 250 | midi_usb.send( noteoff ) 251 | keys_pressed.remove( event.key_number ) 252 | else: 253 | spin_hue = event.pressed 254 | if event.key_number == 19: # octave up/dn enable 255 | oct_switch = event.pressed 256 | 257 | # this is dumb, pitch up should be +8191, pitch middle 0, pitch down -8192 258 | 259 | if event.key_number == 18: # pitchbend up 260 | if event.pressed and oct_switch: 261 | octave = octave+1 262 | else: 263 | pb_val = PitchBend(16383) if event.pressed else PitchBend(8192) 264 | midi_serial.send( pb_val ) 265 | midi_usb.send( pb_val ) 266 | if event.key_number == 17: # pitchbend down 267 | if event.pressed and oct_switch: 268 | octave = octave-1 269 | else: 270 | pb_val = PitchBend(0) if event.pressed else PitchBend(8192) 271 | midi_serial.send( pb_val ) 272 | midi_usb.send( pb_val ) 273 | -------------------------------------------------------------------------------- /circuitpython/wav/909clap1.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/todbot/plinkykeeb/48fc395451df1ebe290b14a16798f10ea1e7fc89/circuitpython/wav/909clap1.wav 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