├── .gitattributes ├── .gitignore ├── LICENSE ├── README.md ├── definitions.cpp ├── definitions.h ├── docs ├── _config.yml ├── hardware.md ├── index.md └── userguide.md ├── edit.cpp ├── edit.h ├── hardware.cpp ├── hardware.h ├── led.cpp ├── led.h ├── notes.cpp ├── notes.h ├── playback.cpp ├── playback.h ├── plexus.ino ├── record.cpp ├── record.h ├── tempo.cpp └── tempo.h /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | 4 | # Custom for Visual Studio 5 | *.cs diff=csharp 6 | 7 | # Standard to msysgit 8 | *.doc diff=astextplain 9 | *.DOC diff=astextplain 10 | *.docx diff=astextplain 11 | *.DOCX diff=astextplain 12 | *.dot diff=astextplain 13 | *.DOT diff=astextplain 14 | *.pdf diff=astextplain 15 | *.PDF diff=astextplain 16 | *.rtf diff=astextplain 17 | *.RTF diff=astextplain 18 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Windows image file caches 2 | Thumbs.db 3 | ehthumbs.db 4 | 5 | # Folder config file 6 | Desktop.ini 7 | 8 | # Recycle Bin used on file shares 9 | $RECYCLE.BIN/ 10 | 11 | # Windows Installer files 12 | *.cab 13 | *.msi 14 | *.msm 15 | *.msp 16 | 17 | # Windows shortcuts 18 | *.lnk 19 | 20 | # ========================= 21 | # Operating System Files 22 | # ========================= 23 | 24 | # OSX 25 | # ========================= 26 | 27 | .DS_Store 28 | .AppleDouble 29 | .LSOverride 30 | 31 | # Thumbnails 32 | ._* 33 | 34 | # Files that might appear in the root of a volume 35 | .DocumentRevisions-V100 36 | .fseventsd 37 | .Spotlight-V100 38 | .TemporaryItems 39 | .Trashes 40 | .VolumeIcon.icns 41 | 42 | # Directories potentially created on remote AFP share 43 | .AppleDB 44 | .AppleDesktop 45 | Network Trash Folder 46 | Temporary Items 47 | .apdisk 48 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 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 General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # plexus 2 | matrix driven sequencer/keyboard/arpeggiator 3 | 4 | plexus is a diy device that interfaces a novation launchpad to a teensy and provides 4 channels of cv/gate output. 5 | 6 | The software running on the teensy implements a 4 channel hybrid sequencer/keyboard/arpeggiator inspired by the monome polygome application. 7 | 8 | see https://widdly.github.io/plexus/ for details 9 | -------------------------------------------------------------------------------- /definitions.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpegiattor 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | 19 | // Arduino IDE doesn't like h files without cpp files. 20 | 21 | void empty() 22 | { 23 | }; 24 | 25 | -------------------------------------------------------------------------------- /definitions.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef DEFINITIONS_H 19 | #define DEFINITIONS_H 20 | #include "WProgram.h" 21 | 22 | #define GRID_SIZE 64 23 | #define VOICE_COUNT 4 24 | 25 | #define SEQUENCE_LENGTH 8 26 | #define GRID_WIDTH 8 27 | #define GRID_HEIGHT 8 28 | 29 | #define LED_OFF 0x0C 30 | #define LED_GREEN 0x3C 31 | #define LED_RED 0x0F 32 | #define LED_YELLOW 0x3E 33 | #define LED_AMBER 0x3F 34 | 35 | //modes (selected via right hand buttons) 36 | #define PLAY 0 37 | #define REC 1 38 | #define EDIT 2 39 | #define TEMPO_EDIT 3 40 | #define MODE_COUNT 4 41 | 42 | #define SEQUENCE_COUNT 8 43 | #define TOP_LED_COUNT 8 44 | #define RIGHT_LED_COUNT 8 45 | 46 | typedef struct Step 47 | { 48 | unsigned char offset_x; 49 | unsigned char offset_y; 50 | boolean gate; 51 | byte gate_length; 52 | } 53 | Step; 54 | 55 | typedef struct Sequence 56 | { 57 | byte length; 58 | Step steps[SEQUENCE_LENGTH]; 59 | } 60 | Sequence; 61 | 62 | typedef struct Playback 63 | { 64 | boolean playing; 65 | boolean button_down; 66 | boolean hold_on; 67 | 68 | byte initial_button; 69 | byte current_step; 70 | byte current_button; 71 | boolean gate; 72 | byte remaining_gate_time; 73 | 74 | Sequence * sequence; 75 | } 76 | Playback; 77 | 78 | #endif 79 | -------------------------------------------------------------------------------- /docs/_config.yml: -------------------------------------------------------------------------------- 1 | theme: jekyll-theme-minimal -------------------------------------------------------------------------------- /docs/hardware.md: -------------------------------------------------------------------------------- 1 | [overview](index.md) | hardware | [user guide](userguide.md) 2 | 3 | ## hardware 4 | 5 | A prototype version of the plexus hardware has been built in order to test and refine the concept. The prototype was built on perfboard and housed in a guitar pedal enclosure. Future work will include a pcb and panel layout according to the eurorack modular standard. 6 | 7 | The hardware consists of a usb midi host, a teensy 3.2 microcontroller, 4 channels of 12 bit DAC, 5 transistor driven gate outputs and 1 gate input. 8 | 9 | I will put a proper schematic here when I have drawn it. 10 | 11 | ![plexus internals ](https://cloud.githubusercontent.com/assets/7449649/25435266/cbf03f64-2ad2-11e7-81c3-1e9679fff9b8.jpg) 12 | ##### power 13 | A 7805 regulator is used to supply 5v to the device. In the prototype this is fed from a standard 9v guitar plug pack. It should be possible to power this from the +12v rail of a eurorack system. The regulator should probably include a heat sink given that the launchpad can draw 500mA via the USB port. 14 | ##### usb midi host 15 | The novation launchpad is a class compliant usb midi device. The plexus interfaces to the launchpad via a [hobbytronics usb host mini](http://www.hobbytronics.co.uk/usb-host/usb-host-mini) (the blue pcb in the photo). It outputs standard serial midi rx/tx directly to the teensy uart. The usb host mini is powered by 5v from the 7805 and feeds 5v at up to 500mA to the novation launchpad via USB. 16 | ##### teensy 3.2 17 | A [teensy 3.2](https://www.pjrc.com/store/teensy32.html) provides the smarts for the plexus. The source in the github repo can be built and uploaded using the standard (horrible) arduino ide. 18 | ##### gate in/out 19 | The gate outputs are driven from the teensy output pins via a transistor to give standard 5v gate signals. 20 | 21 | ##### MCP4822 DAC 22 | A pair of MCP4822 are driven via SPI by the teensy. [datasheet](https://www.abelectronics.co.uk/docs/stock/raspberrypi/adcdac/mcp4822.pdf) 23 | 24 | A MCP6004 quad opamp scales the analog output to give the correct 1v/oct. Trimmers are provided to calibrate the outputs. 25 | -------------------------------------------------------------------------------- /docs/index.md: -------------------------------------------------------------------------------- 1 | overview | [hardware](hardware.md) | [user guide](userguide.md) 2 | 3 | ## matrix driven sequencer/keyboard/arpeggiator 4 | 5 | plexus is a mixture of a keyboard, arpeggiator and sequencer for playing modular synthesizers. A device was required that is less hands-on than a keyboard and more interactive than a step sequencer. Playing a modular synthesizer involves lots of tweaking of knobs, plugging and unplugging cables and flicking switches. This makes the traditional black and white keyboard a less than ideal partner for the modular since they require a lot of your attention and your hands. The step sequencer, a common tool in modular synthesizers, lacks the immediacy and melodic variety of the keyboard. plexus is an attempt to combine the tactility of the keyboard with the autonomy of the sequencer. 6 | 7 | 8 | In the late 2000’s, button/led matrix controllers burst onto the music making scene. Led by Brian Crabtree’s [monome](http://monome.org/) and Toshio Iwai's tenori-on, devices offering programmable arrays of illuminated pushbuttons were pressed into service controlling a diverse range of software applications. Drawing inspiration from these projects, in particular [stretta’s polygome monome application](https://github.com/stretta/BEAP/wiki/MIDI-and-monome) but eschewing personal computers and embracing modular synthesis, plexus hopes to further this exploration. 9 | 10 | 11 | Pressing a button on the matrix causes plexus to start playing a melodic phrase, diatonically transposed relative to the button position. The melodic phrase is temporally synced to an internal metronome. Up to 4 different melodic sequences can be played simultaneously and each sequence can be sustained and looped for hands free play. The melodic phrases can be edited on the device and can include rests, variable step lengths and irregular length sequences. 12 | 13 | 14 | plexus makes use of an off the shelf [Novation Launchpad mini](https://global.novationmusic.com/launch/launchpad-mini) for the button/led matrix and interfaces with it via USB. 15 | 16 | 17 | ![plexus hardware ](https://cloud.githubusercontent.com/assets/7449649/25432894/ae2e34f8-2ac9-11e7-8fee-1268903c134e.jpg) 18 | 19 | ### a quick demo 20 | 21 | In the video, the plexus hardware is sequencing various cgs and serge modules. No computer is involved. 22 | 23 | 24 | 25 | 26 | 27 | -------------------------------------------------------------------------------- /docs/userguide.md: -------------------------------------------------------------------------------- 1 | [overview](index.md) | [hardware](hardware.md) | user guide 2 | 3 | ## user guide 4 | 5 | 6 | #### mode 7 | The right hand side round buttons select and indicate the current mode. 8 | 9 | 10 | The modes are playback, record, edit and tempo. The bottom 4 mode buttons are unassigned in current firmware. Only a single mode can be selected at any time and the currently selected mode will be lit green. 11 | 12 | ![launchpad_main_layout](https://cloud.githubusercontent.com/assets/7449649/25469055/483136ca-2b5d-11e7-9ef6-2b535ab51923.png) 13 | 14 | #### channel selection and hold 15 | The top row of round buttons are used to enable/disable hold and to select the current channel. 16 | 17 | 18 | The top left four buttons are for enabling/disabling hold on each of the four channels. The buttons will be lit orange when hold is engaged. Any sequence on a channel will loop while hold is enabled, and stop looping once hold is disengaged. 19 | 20 | 21 | The top right four buttons select the current channel. Only one channel can be selected at a time and the current selected channel button will be lit green. The playback, record and edit modes operate on the currently selected channel. 22 | 23 | 24 | #### playback 25 | In playback mode, pressing one of the square buttons will start the sequence playing. The currently playing note will be illuminated in green. Releasing the button will stop the sequence, unless hold is enabled for the channel. 26 | 27 | 28 | The sequence’s starting note will depend on the button location according to the following layout. 29 | 30 | ![launchpad_note_layout](https://cloud.githubusercontent.com/assets/7449649/25468712/0e7cd7ce-2b5b-11e7-8d8c-a19fbfa2f498.png) 31 | 32 | The sequence is shifted according to the grid location and diatonically transposed. If any part of the sequence extends beyond the edge of the grid it will wrap around and be shifted up or down accordingly. 33 | 34 | 35 | 36 | 37 | A future firmware version will implement additional heptatonic scales, besides the major scale. 38 | 39 | 40 | 41 | #### record 42 | Record mode is used to record a new sequence. The first square button pushed records the starting note of the sequence. Subsequent notes are recorded relative to the starting note. The current step and sequence length is indicated by a horizontal red bar along the bottom row of the button matrix. Sequences can be up to 8 steps long. 43 | 44 | 45 | 46 | #### edit 47 | Using edit mode, the rhythm of the sequence can be edited to include long and short notes, rests and different length repetitions. 48 | 49 | 50 | The edit screen is divided into three sections. Each step in the sequence is represented by a column on the button matrix. 51 | 52 | ![launchpad_edit_mode](https://cloud.githubusercontent.com/assets/7449649/25468713/0e81f1aa-2b5b-11e7-9a73-3ad208977fea.png) 53 | 54 | The top 6 rows control the step lengths. Each step can be from 1 to 6 clock ticks in length. The length will display as 1 to 6 vertical orange lights and pressing the appropriate button will change the steps length. 55 | 56 | 57 | The 7th row controls whether the step will send a gate out. If the button is lit green then a gate signal will occur when that step is played. Pressing the appropriate button will toggle the gate out setting. 58 | 59 | 60 | The bottom row controls the sequence length. The current length is indicated by the number of red lit buttons. Pressing the left most bottom row button sets the length to 1, pressing the right most bottom row button sets the length to 8, and so on. 61 | 62 | 63 | 64 | 65 | #### tempo 66 | The tempo mode displays the current tempo in BPM. The bottom row of buttons can be used to vary the tempo. The second bottom row provides a clock divider that effects all the channels. 67 | The right most button on the bottom row can be used to switch between the internal metronome and an external clock source. If external clock source is selected, the display shows a green arrow. 68 | 69 | 70 | -------------------------------------------------------------------------------- /edit.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "edit.h" 19 | #include "led.h" 20 | #include "playback.h" 21 | 22 | Sequence * edit; 23 | 24 | void edit_start( const byte voice ) 25 | { 26 | edit = playback[voice].sequence; 27 | grid_led_update = true; 28 | } 29 | 30 | void edit_button_down ( const byte button) 31 | { 32 | byte coloumn = button % 8; 33 | byte row = button / 8; 34 | 35 | //bottom row is sequence length 36 | if (row == 7) 37 | { 38 | edit->length = coloumn + 1; 39 | } 40 | else if (row == 6) 41 | { 42 | edit->steps[coloumn].gate = !(edit->steps[coloumn].gate); 43 | } 44 | else 45 | { 46 | edit->steps[coloumn].gate_length = 6 - row; 47 | } 48 | grid_led_update = true; 49 | } 50 | 51 | boolean edit_led_update() 52 | { 53 | //edit screen bottom row is sequence length 54 | //second bottom is gate on 55 | //rest of screen is bar graph of step length 56 | for (int row = 0; row < GRID_HEIGHT; row++ ) 57 | { 58 | for (int coloumn = 0; coloumn < GRID_WIDTH; coloumn++ ) 59 | { 60 | int button = (row * 8) + coloumn; 61 | if (row == 7) 62 | { 63 | if ((coloumn + 1) <= edit->length) 64 | { 65 | if (set_grid_led(button, LED_RED)) 66 | return true; 67 | } 68 | else 69 | { 70 | if (set_grid_led(button, LED_OFF)) 71 | return true; 72 | } 73 | } 74 | else if (row == 6) 75 | { 76 | if (edit->steps[coloumn].gate) 77 | { 78 | if (set_grid_led(button, LED_GREEN)) 79 | return true; 80 | } 81 | else 82 | { 83 | if ( set_grid_led(button, LED_OFF)) 84 | return true; 85 | } 86 | } 87 | else 88 | { 89 | if (edit->steps[coloumn].gate_length >= (6-row)) 90 | { 91 | if ( set_grid_led(button, LED_YELLOW)) 92 | return true; 93 | } 94 | else 95 | { 96 | if (set_grid_led(button, LED_OFF)) 97 | return true; 98 | } 99 | } 100 | } 101 | } 102 | return false; 103 | } 104 | -------------------------------------------------------------------------------- /edit.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef EDIT_H 19 | #define EDIT_H 20 | #include "definitions.h" 21 | //edit handlers 22 | void edit_start( const byte voice ); 23 | void edit_button_down ( const byte button); 24 | boolean edit_led_update(); 25 | #endif 26 | 27 | -------------------------------------------------------------------------------- /hardware.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "hardware.h" 19 | #include "SPI.h" 20 | #include "definitions.h" 21 | 22 | // hardware digital i/o pins 23 | #define CLK_IN_PIN 8 24 | #define CLK_OUT_PIN 6 25 | #define GATE_OUT_PIN_1 2 26 | #define GATE_OUT_PIN_2 3 27 | #define GATE_OUT_PIN_3 4 28 | #define GATE_OUT_PIN_4 5 29 | const byte gate_out_pins[VOICE_COUNT] = {GATE_OUT_PIN_1,GATE_OUT_PIN_2,GATE_OUT_PIN_3,GATE_OUT_PIN_4}; 30 | // DAC pins 31 | #define CS_PIN_A 9 32 | #define CS_PIN_B 10 33 | // these are internal to the SPI library 34 | //#define SCK_PIN 13 35 | //#define MOSI_PIN 11 36 | #define MAX_NOTE 60 37 | 38 | /* CV output DACs 39 | MCP4822 40 | teensy 41 | 5v Vdd - 1 8 - VoutA 42 | pin 9or10 /CS - 2 7 - AVss <-- GND 43 | pin 13 SCK - 3 6 - VoutB 44 | pin 11 SDI - 4 5 - /LDAC <-- not used tied to GND 45 | 46 | Vout A/B to non-inverting opamp with gain ~ 1.225 47 | 1 semitone = 68 milivolts 48 | 5 octaves = 60 semitones = 4.080 volts 49 | external gain = 1.22549 50 | R1 = 100k 51 | R2 = 22k + 1k trimmer 52 | gain = 1 + R2 / R1 ~ 1.22 -> 1.23 53 | */ 54 | void setup_cv_dac_hw() 55 | { 56 | pinMode(CS_PIN_A,OUTPUT); 57 | digitalWrite(CS_PIN_A,HIGH); 58 | pinMode(CS_PIN_B,OUTPUT); 59 | digitalWrite(CS_PIN_B,HIGH); 60 | SPI.begin(); 61 | SPI.setClockDivider(SPI_CLOCK_DIV2); 62 | set_cv_output_hw(0,0); 63 | set_cv_output_hw(1,0); 64 | set_cv_output_hw(2,0); 65 | set_cv_output_hw(3,0); 66 | } 67 | 68 | void set_cv_output_hw( const byte thannel, const byte note_number) 69 | { 70 | const byte cv_out_map[4]={2,0,1,3}; 71 | const byte channel = cv_out_map[thannel]; 72 | //LDAC and shutdown not used 73 | //gain always set to 2x ( 4.096 max out) 74 | const unsigned int millivolts = (note_number%MAX_NOTE) * 68; 75 | const byte channel_cs_pin[VOICE_COUNT] = {CS_PIN_A,CS_PIN_A,CS_PIN_B,CS_PIN_B}; 76 | const byte cs_pin = channel_cs_pin[channel%VOICE_COUNT]; 77 | byte lowByte = millivolts & 0xff; 78 | byte highByte = ((millivolts >> 8) & 0xff)|0x10; 79 | if ((channel == 1)||(channel==3)) 80 | highByte |= 0x80; 81 | digitalWrite(cs_pin,LOW); 82 | SPI.transfer(highByte); 83 | SPI.transfer(lowByte); 84 | digitalWrite(cs_pin,HIGH); 85 | } 86 | 87 | void setup_digital_io_hw() 88 | { 89 | //digital inputs <--- TBD handle hw clk input 90 | pinMode(CLK_IN_PIN,INPUT_PULLUP); 91 | // TBD setup HW interrupt here 92 | 93 | //digital outputs 94 | for (int idx = 0; idx < VOICE_COUNT; idx++) 95 | { 96 | pinMode(gate_out_pins[idx],OUTPUT); 97 | digitalWrite(gate_out_pins[idx],HIGH); 98 | } 99 | pinMode(CLK_OUT_PIN,OUTPUT); 100 | digitalWrite(CLK_OUT_PIN,HIGH); 101 | } 102 | 103 | void set_gate_output_hw( const byte channel, const boolean state) 104 | { 105 | if (state) 106 | digitalWrite(gate_out_pins[channel],LOW); 107 | else 108 | digitalWrite(gate_out_pins[channel],HIGH); 109 | } 110 | 111 | void set_clock_output_hw( const boolean state) 112 | { 113 | if (state) 114 | digitalWrite(CLK_OUT_PIN,LOW); 115 | else 116 | digitalWrite(CLK_OUT_PIN,HIGH); 117 | } 118 | byte get_x_from_button( const byte button ) 119 | { 120 | return (button & 0x3F) % GRID_HEIGHT; 121 | } 122 | 123 | byte get_y_from_button( const byte button ) 124 | { 125 | return (button & 0x3F) / GRID_WIDTH; 126 | } 127 | 128 | byte get_button_from_x_y( const byte x, const byte y ) 129 | { 130 | return (y * GRID_WIDTH) + x; 131 | } 132 | 133 | 134 | -------------------------------------------------------------------------------- /hardware.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef HARDWARE_H 19 | #define HARDWARE_H 20 | #include "definitions.h" 21 | //dac and hw out handlers 22 | void setup_cv_dac_hw(); 23 | void set_cv_output_hw( const byte channel, const byte note_number); 24 | void setup_digital_io_hw(); 25 | void set_gate_output_hw( const byte channel, const boolean state); 26 | void set_clock_output_hw( const boolean state); 27 | //helper functions 28 | byte get_x_from_button( const byte button ); 29 | byte get_y_from_button( const byte button ); 30 | byte get_button_from_x_y( const byte x, const byte y ); 31 | #endif 32 | 33 | -------------------------------------------------------------------------------- /led.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include 19 | #include "led.h" 20 | //led cache and update flags 21 | boolean right_led_update = false; 22 | boolean top_led_update = false; 23 | boolean grid_led_update = false; 24 | byte right_led_cache[RIGHT_LED_COUNT] = { 25 | LED_OFF 26 | }; 27 | byte top_led_cache[TOP_LED_COUNT] = { 28 | 0 29 | }; 30 | byte grid_led_cache[GRID_SIZE] = { 31 | LED_OFF 32 | }; 33 | boolean set_right_led(byte position, byte color ) 34 | { 35 | if (right_led_cache[position] != color) 36 | { 37 | if (color == LED_OFF) 38 | MIDI.sendNoteOff((position * 16) + 8, color, 1); 39 | else 40 | MIDI.sendNoteOn((position * 16) + 8, color, 1); 41 | right_led_cache[position] = color; 42 | return true; 43 | } 44 | return false; 45 | } 46 | boolean set_top_led(byte position, byte color ) 47 | { 48 | if (top_led_cache[position] != color) 49 | { 50 | MIDI.sendControlChange(104 + position, color, 1); 51 | top_led_cache[position] = color; 52 | return true; 53 | } 54 | return false; 55 | } 56 | boolean set_grid_led(byte position, byte color ) 57 | { 58 | if (grid_led_cache[position] != color) 59 | { 60 | byte button = ((position / 8) * 16) + (position % 8); 61 | if (color == LED_OFF) 62 | MIDI.sendNoteOff( button, color, 1); 63 | else 64 | MIDI.sendNoteOn( button, color, 1); 65 | grid_led_cache[position] = color; 66 | return true; 67 | } 68 | return false; 69 | } 70 | -------------------------------------------------------------------------------- /led.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef LED_H 19 | #define LED_H 20 | #include "definitions.h" 21 | #include "tempo.h" 22 | extern boolean right_led_update; 23 | extern boolean top_led_update; 24 | extern boolean grid_led_update; 25 | //led functions 26 | boolean set_right_led(byte position, byte color ); 27 | boolean set_top_led(byte position, byte color ); 28 | boolean set_grid_led(byte position, byte color ); 29 | #endif 30 | -------------------------------------------------------------------------------- /notes.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "notes.h" 19 | byte transpose = 0; 20 | byte scale = 0; 21 | #define SCALE_COUNT 16 22 | #define SCALE_LENGTH 7 23 | //given matrix position, get the scale step 24 | const byte matrix_to_scale_step[GRID_SIZE]= 25 | { 26 | 3,4,5,6,0,1,2,3, 27 | 0,1,2,3,4,5,6,0, 28 | 3,4,5,6,0,1,2,3, 29 | 0,1,2,3,4,5,6,0, 30 | 3,4,5,6,0,1,2,3, 31 | 0,1,2,3,4,5,6,0, 32 | 3,4,5,6,0,1,2,3, 33 | 0,1,2,3,4,5,6,0 34 | }; 35 | //given matrix position, get the octave 36 | const byte matrix_to_octave[GRID_SIZE]= 37 | { 38 | 3,3,3,3,4,4,4,4, 39 | 3,3,3,3,3,3,3,4, 40 | 2,2,2,2,3,3,3,3, 41 | 2,2,2,2,2,2,2,3, 42 | 1,1,1,1,2,2,2,2, 43 | 1,1,1,1,1,1,1,2, 44 | 0,0,0,0,1,1,1,1, 45 | 0,0,0,0,0,0,0,1 46 | }; 47 | const byte scales [SCALE_COUNT][SCALE_LENGTH] = 48 | { 49 | //heptatonia Prima 50 | {0,2,4,5,7,9,11}, //ionian 51 | {0,2,3,5,7,9,10}, //dorian 52 | {0,1,3,5,7,8,10}, //phyrgian 53 | {0,2,4,6,7,9,11}, //lydian 54 | {0,2,4,5,7,9,10}, //Mixolydian 55 | {0,2,3,5,7,8,10}, // Aeolian 56 | {0,1,3,5,6,8,10}, //Locrain 57 | {0,2,3,5,7,8,11}, // Harmonic Minor 58 | //heptatonia Secunda 59 | {0,2,4,5,7,8,10}, // major minor scale 60 | {0,2,3,5,7,9,11}, // Melodic Minor 61 | {0,1,3,5,7,9,10}, // phyrgian raised 6th 62 | {0,2,4,6,8,9,11}, // lydian raised 5th 63 | {0,2,4,6,7,9,10}, // lydian dominant 64 | {0,2,4,5,6,8,10}, //Locrain sharp 2 - half diminished 65 | {0,1,3,4,6,8,10}, //Locrain diminished 4- altered 66 | //others 67 | {0,1,3,5,7,8,11} //neapolitan minor 68 | }; 69 | 70 | //converts a matrix location to an actual midi note number 71 | byte get_note_number( const byte button ) 72 | { 73 | const byte scale_step = matrix_to_scale_step[button]; 74 | byte note = matrix_to_octave[button] * 12; 75 | note += scales[scale][scale_step]; 76 | note += transpose; 77 | while (note > 60) 78 | note -= 12; 79 | return note; 80 | } 81 | -------------------------------------------------------------------------------- /notes.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef NOTES_H 19 | #define NOTES_H 20 | #include "definitions.h" 21 | byte get_note_number( const byte button ); 22 | #endif 23 | -------------------------------------------------------------------------------- /playback.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "led.h" 19 | #include "playback.h" 20 | #include "hardware.h" 21 | #include "notes.h" 22 | 23 | unsigned int tick = 0; 24 | Sequence sequences[SEQUENCE_COUNT]; 25 | Playback playback[VOICE_COUNT]; 26 | byte select_voice = 0; 27 | 28 | // current output state of playback sequencer 29 | byte playback_led[VOICE_COUNT] = { 30 | 0 31 | }; 32 | boolean playback_gate[VOICE_COUNT] = { 33 | false 34 | }; 35 | boolean playback_led_on[VOICE_COUNT] = { 36 | false 37 | }; 38 | 39 | void playback_setup() 40 | { 41 | for (int idx = 0; idx < VOICE_COUNT; idx++) 42 | { 43 | playback[idx].playing = false; 44 | playback[idx].playing = false; 45 | playback[idx].button_down = false; 46 | playback[idx].hold_on = false; 47 | playback[idx].initial_button = 0; 48 | playback[idx].current_step = 0; 49 | playback[idx].current_button = 0; 50 | playback[idx].gate = false; 51 | playback[idx].remaining_gate_time = 0; 52 | playback[idx].sequence = &sequences[idx]; 53 | } 54 | //TBD Initialize these with something interesting or load from persistent memory 55 | for (int idx = 0; idx < SEQUENCE_COUNT ; idx++ ) 56 | { 57 | sequences[idx].length = 4; 58 | for (int step = 0; step < SEQUENCE_LENGTH; step++ ) 59 | { 60 | sequences[idx].steps[step].offset_x = step; 61 | sequences[idx].steps[step].offset_y = step; 62 | sequences[idx].steps[step].gate = true; 63 | sequences[idx].steps[step].gate_length = 1; 64 | } 65 | } 66 | } 67 | void playback_start() 68 | { 69 | grid_led_update = true; 70 | } 71 | void playback_button_down ( const byte button, const byte voice) 72 | { 73 | if (!playback[voice].button_down) 74 | { 75 | playback[voice].button_down = true; 76 | if (((playback[voice].playing) && (playback[voice].initial_button != button)) || (!playback[voice].playing)) 77 | { 78 | playback[voice].playing = true; 79 | playback[voice].initial_button = button; 80 | playback[voice].current_step = 0; 81 | playback[voice].current_button = button; 82 | playback[voice].gate = playback[voice].sequence->steps[0].gate; 83 | playback[voice].remaining_gate_time = playback[voice].sequence->steps[0].gate_length; 84 | if (tick ==0) 85 | playback[voice].remaining_gate_time += 1; 86 | 87 | set_cv_output_hw(voice,get_note_number(playback[voice].current_button)); 88 | playback_led_on[voice] = true; 89 | playback_led[voice] = button; 90 | grid_led_update = true; 91 | set_gate_output_hw(voice,playback[voice].gate); 92 | } 93 | } 94 | } 95 | void playback_button_up( const byte button, const byte voice) 96 | { 97 | if (playback[voice].button_down) 98 | { 99 | if (button != playback[voice].initial_button) 100 | return; 101 | 102 | playback[voice].button_down = false; 103 | if (!playback[voice].hold_on) 104 | { 105 | playback[voice].playing = false; 106 | playback_gate[voice] = false; 107 | playback_led_on[voice] = false; 108 | grid_led_update = true; 109 | set_gate_output_hw(voice,false); 110 | } 111 | } 112 | } 113 | void playback_set_hold ( const byte voice, const boolean hold_state ) 114 | { 115 | playback[voice].hold_on = hold_state; 116 | //if we are currently holding a sequence then end it 117 | if ((!hold_state) && (playback[voice].playing) && (!playback[voice].button_down)) 118 | { 119 | playback[voice].playing = false; 120 | playback_gate[voice] = false; 121 | playback_led_on[voice] = false; 122 | grid_led_update = true; 123 | set_gate_output_hw(voice,false); 124 | } 125 | } 126 | void playback_clock_rising () 127 | { 128 | set_clock_output_hw(true); 129 | for (int voice = 0; voice < VOICE_COUNT; voice++) 130 | { 131 | if (playback[voice].playing) 132 | { 133 | playback[voice].remaining_gate_time--; 134 | if (playback[voice].remaining_gate_time == 0) 135 | { 136 | playback[voice].current_step++; 137 | playback[voice].current_step %= playback[voice].sequence->length; 138 | 139 | byte this_step = playback[voice].current_step; 140 | 141 | unsigned char x = get_x_from_button(playback[voice].initial_button); 142 | x += playback[voice].sequence->steps[this_step].offset_x; 143 | while ( x < 0 ) 144 | x += 8; 145 | x = x % GRID_WIDTH; 146 | unsigned char y = get_y_from_button(playback[voice].initial_button); 147 | y += playback[voice].sequence->steps[this_step].offset_y; 148 | while ( y < 0 ) 149 | y += 8; 150 | y = y % GRID_HEIGHT; 151 | playback[voice].current_button = get_button_from_x_y(x, y); 152 | 153 | playback_led[voice] = playback[voice].current_button ; 154 | set_cv_output_hw(voice,get_note_number(playback[voice].current_button)); 155 | 156 | playback[voice].gate = playback[voice].sequence->steps[this_step].gate; 157 | playback[voice].remaining_gate_time = playback[voice].sequence->steps[this_step].gate_length; 158 | playback_gate[voice] = playback[voice].gate; 159 | grid_led_update = true; 160 | set_gate_output_hw(voice,playback[voice].gate); 161 | } 162 | } 163 | } 164 | } 165 | void playback_clock_falling () 166 | { 167 | set_clock_output_hw(false); 168 | for (int voice = 0; voice < VOICE_COUNT; voice++) 169 | { 170 | if ((playback[voice].playing) && (playback[voice].remaining_gate_time <= 1)) 171 | { 172 | playback_gate[voice] = false; 173 | set_gate_output_hw(voice,false); 174 | } 175 | } 176 | } 177 | 178 | void playback_clock() 179 | { 180 | tick = (tick + 1) % 2; 181 | if (tick) 182 | playback_clock_rising(); 183 | else 184 | playback_clock_falling(); 185 | } 186 | 187 | boolean playback_led_update() 188 | { 189 | for (int idx = 0; idx < GRID_SIZE; idx++ ) 190 | { 191 | if (( idx == playback_led[select_voice] ) && (playback_led_on[select_voice])) 192 | { 193 | if (set_grid_led(idx, LED_GREEN)) 194 | return true; 195 | } 196 | else if (( idx == playback_led[0] ) && (playback_led_on[0])) 197 | { 198 | if ( set_grid_led(idx, LED_YELLOW)) 199 | return true; 200 | } 201 | else if (( idx == playback_led[1] ) && (playback_led_on[1])) 202 | { 203 | if ( set_grid_led(idx, LED_YELLOW)) 204 | return true; 205 | } 206 | else if (( idx == playback_led[2] ) && (playback_led_on[2])) 207 | { 208 | if ( set_grid_led(idx, LED_YELLOW)) 209 | return true; 210 | } 211 | else if (( idx == playback_led[3] ) && (playback_led_on[3])) 212 | { 213 | if ( set_grid_led(idx, LED_YELLOW)) 214 | return true; 215 | } 216 | else 217 | { 218 | if ( set_grid_led(idx, LED_OFF)) 219 | return true; 220 | } 221 | } 222 | return false; 223 | } 224 | -------------------------------------------------------------------------------- /playback.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef PLAYBACK_H 19 | #define PLAYBACK_H 20 | #include "definitions.h" 21 | extern byte select_voice; 22 | extern Playback playback[VOICE_COUNT]; 23 | //playback handlers 24 | void playback_setup(); 25 | void playback_start(); 26 | void playback_set_hold ( const byte voice, const boolean hold_state ); 27 | void playback_button_down ( const byte button, const byte voice); 28 | void playback_button_up( const byte button, const byte voice); 29 | void playback_clock(); 30 | boolean playback_led_update(); 31 | #endif 32 | -------------------------------------------------------------------------------- /plexus.ino: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include 19 | #include "definitions.h" 20 | #include "notes.h" 21 | #include "hardware.h" 22 | #include "tempo.h" 23 | #include "led.h" 24 | #include "edit.h" 25 | #include "playback.h" 26 | #include "record.h" 27 | //generic handlers 28 | void handle_button_down( byte button ); 29 | void handle_button_up( byte button ); 30 | void handle_mode_button( byte button ); 31 | void handle_function_button( byte button ); 32 | // top and right button states 33 | byte mode = PLAY; 34 | boolean hold[VOICE_COUNT] = { 35 | false 36 | }; 37 | ////////////////////////////////////////////////////////////////////////// 38 | byte note_cache[128] = {0}; 39 | void handle_note_on(byte channel, byte pitch, byte velocity) 40 | { 41 | if ((velocity != 0) && (velocity != 127)) 42 | return; 43 | if (note_cache[pitch] == velocity) 44 | return; 45 | note_cache[pitch] = velocity; 46 | byte y = pitch / 16; 47 | byte x = pitch % 16; 48 | if ((x == 8) && (velocity == 127)) 49 | { 50 | handle_mode_button(y); 51 | } 52 | else 53 | { 54 | byte button = x + (y * 8); 55 | if (velocity == 127) 56 | handle_button_down(button); 57 | else if (velocity == 0) 58 | handle_button_up(button); 59 | } 60 | } 61 | void handle_note_off(byte channel, byte pitch, byte velocity) 62 | { 63 | if (velocity != 0) 64 | return; 65 | if (note_cache[pitch] == 0) 66 | return; 67 | note_cache[pitch] = 0; 68 | byte y = pitch / 16; 69 | byte x = pitch % 16; 70 | byte button = x + (y * 8); 71 | if (x < 8) 72 | handle_button_up(button); 73 | } 74 | void handle_control_change(byte channel, byte number, byte value) 75 | { 76 | static byte cc_cache[128] = {0}; 77 | //only want 0 or 127 and only changes 78 | if ((value != 127)&&(value != 0)) 79 | return; 80 | if (cc_cache[number] == value ) 81 | return; 82 | cc_cache[number] = value; 83 | if ((number >= 104) && (number <= 112)) 84 | { 85 | byte y = number - 104; 86 | if (value == 127) 87 | { 88 | handle_function_button(y); 89 | } 90 | } 91 | } 92 | void reset_launchpad() 93 | { 94 | MIDI.sendControlChange(0, 0, 1); 95 | } 96 | void set_brightness(int bright) 97 | { 98 | int actual_bright = 13 - bright; 99 | if (actual_bright < 0) 100 | actual_bright = 0; 101 | MIDI.sendControlChange(30, actual_bright, 1); 102 | } 103 | ////////////////////////////////////////////////////////////////////////// 104 | void setup() 105 | { 106 | Serial.begin(9600); 107 | MIDI.setHandleNoteOn(handle_note_on); 108 | MIDI.setHandleNoteOff(handle_note_off); 109 | MIDI.setHandleControlChange(handle_control_change); 110 | MIDI.begin(1); 111 | MIDI.turnThruOff(); 112 | reset_launchpad(); 113 | playback_setup(); 114 | record_setup(); 115 | setup_cv_dac_hw(); 116 | setup_digital_io_hw(); 117 | set_metro(25000); 118 | //playback mode, voice 1 selected 119 | set_top_led(4, LED_GREEN); 120 | set_right_led(0, LED_GREEN); 121 | } 122 | void loop() 123 | { 124 | static unsigned int send_delay = 0; 125 | MIDI.read(); 126 | //throttle midi out send speed without 127 | //dropping clock or midi in 128 | if (send_delay > 0) 129 | send_delay--; 130 | else if (led_update()) 131 | send_delay = 2000; //delay after send event 132 | if (metro) 133 | { 134 | metro = 0; 135 | playback_clock(); 136 | } 137 | } 138 | /////////////////////////////////////////////////////////////// 139 | void handle_button_down( byte button ) 140 | { 141 | switch (mode) 142 | { 143 | case PLAY: 144 | playback_button_down(button, select_voice); 145 | break; 146 | case REC: 147 | record_button_down(button); 148 | break; 149 | case EDIT: 150 | edit_button_down(button); 151 | break; 152 | case TEMPO_EDIT: 153 | tempo_button_down (button); 154 | break; 155 | } 156 | } 157 | void handle_button_up( byte button ) 158 | { 159 | switch (mode) 160 | { 161 | case PLAY: 162 | playback_button_up(button, select_voice); 163 | break; 164 | case REC: 165 | break; 166 | case EDIT: 167 | break; 168 | case TEMPO_EDIT: 169 | break; 170 | } 171 | } 172 | void handle_mode_button( byte button ) 173 | { 174 | if (button < MODE_COUNT) 175 | { 176 | if (mode != button) 177 | { 178 | mode = button; 179 | switch (mode) 180 | { 181 | case PLAY: 182 | record_start(select_voice); 183 | break; 184 | case REC: 185 | record_start(select_voice); 186 | break; 187 | case EDIT: 188 | edit_start(select_voice); 189 | break; 190 | case TEMPO_EDIT: 191 | tempo_edit_start(); 192 | break; 193 | } 194 | right_led_update = true; 195 | } 196 | } 197 | } 198 | void handle_function_button( byte button ) 199 | { 200 | if (button < 4)//hold buttons 201 | { 202 | if ( hold[button] ) //hold off 203 | { 204 | hold[button] = false; 205 | playback_set_hold(button, false); 206 | } 207 | else //hold on 208 | { 209 | hold[button] = true; 210 | playback_set_hold(button, true); 211 | } 212 | top_led_update = true; 213 | } 214 | else 215 | { 216 | if (select_voice != button - 4) 217 | { 218 | select_voice = button - 4; 219 | if (mode == REC) 220 | record_start(select_voice); 221 | else if (mode == EDIT) 222 | edit_start(select_voice); 223 | grid_led_update = true; 224 | top_led_update = true; 225 | } 226 | } 227 | } 228 | ////////////////// 229 | boolean led_update() 230 | { 231 | //right leds indicate current mode 232 | if (right_led_update) 233 | { 234 | for (int idx = 0; idx < RIGHT_LED_COUNT; idx++) 235 | { 236 | if (mode == idx) 237 | { 238 | if (set_right_led(idx, LED_GREEN)) 239 | return true; 240 | } 241 | else 242 | { 243 | if (set_right_led(idx, LED_OFF)) 244 | return true; 245 | } 246 | } 247 | right_led_update = false; 248 | } 249 | //top leds indicate hold and current channel 250 | if (top_led_update) 251 | { 252 | for (int idx = 0; idx < VOICE_COUNT; idx++) 253 | { 254 | if ( hold[idx] ) 255 | { 256 | if (set_top_led(idx, LED_AMBER)) 257 | return true; 258 | } 259 | else 260 | { 261 | if (set_top_led(idx, 0)) 262 | return true; 263 | } 264 | if ( idx == select_voice ) 265 | { 266 | if (set_top_led(VOICE_COUNT + idx, LED_GREEN)) 267 | return true; 268 | } 269 | else 270 | { 271 | if (set_top_led(VOICE_COUNT + idx, 0)) 272 | return true; 273 | } 274 | } 275 | top_led_update = false; 276 | } 277 | if (grid_led_update) 278 | { 279 | switch (mode) 280 | { 281 | case PLAY: 282 | if (playback_led_update()) 283 | return true; 284 | break; 285 | case REC: 286 | if (record_led_update()) 287 | return true; 288 | break; 289 | case EDIT: 290 | if (edit_led_update()) 291 | return true; 292 | break; 293 | case TEMPO_EDIT: 294 | if (tempo_update_led()) 295 | return true; 296 | break; 297 | 298 | } 299 | grid_led_update = false; 300 | } 301 | return false; 302 | } 303 | 304 | -------------------------------------------------------------------------------- /record.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "led.h" 19 | #include "playback.h" 20 | #include "hardware.h" 21 | #include "notes.h" 22 | #include "record.h" 23 | // current output state of record 24 | byte record_led = 0; 25 | boolean record_led_on = false; 26 | 27 | typedef struct Record 28 | { 29 | boolean recording; 30 | byte initial_button; 31 | byte current_step; 32 | 33 | Sequence * sequence; 34 | } 35 | Record; 36 | 37 | Record record; 38 | byte temp_seq[SEQUENCE_LENGTH]; 39 | 40 | void record_setup() 41 | { 42 | record.current_step = 0; 43 | record.recording = false; 44 | record.initial_button = 0; 45 | record_led = 0; 46 | record_led_on = false; 47 | } 48 | 49 | void record_start( const byte voice ) 50 | { 51 | record.current_step = 0; 52 | record.recording = true; 53 | record.sequence = playback[voice].sequence; 54 | record_led = 0; 55 | record_led_on = false; 56 | grid_led_update = true; 57 | } 58 | 59 | void record_button_down ( const byte button) 60 | { 61 | if (record.recording) 62 | { 63 | byte step = record.current_step; 64 | record.sequence->steps[step].gate = true; 65 | record.sequence->steps[step].gate_length = 1; 66 | if (step == 0) 67 | { 68 | record.initial_button = button; 69 | record.sequence->steps[0].offset_x = 0; 70 | record.sequence->steps[0].offset_y = 0; 71 | } 72 | else 73 | { 74 | unsigned char x = get_x_from_button(button); 75 | unsigned char y = get_y_from_button(button); 76 | unsigned char start_x = get_x_from_button(record.initial_button); 77 | unsigned char start_y = get_y_from_button(record.initial_button); 78 | record.sequence->steps[step].offset_x = (x - start_x); 79 | record.sequence->steps[step].offset_y = (y - start_y); 80 | } 81 | record.current_step++; 82 | record.sequence->length = record.current_step; 83 | if (record.current_step == SEQUENCE_LENGTH) 84 | { 85 | record.recording = false; 86 | } 87 | record_led = button; 88 | record_led_on = true; 89 | grid_led_update = true; 90 | } 91 | 92 | } 93 | 94 | boolean record_led_update() 95 | { 96 | //the last entered value is red. 97 | //yellow horixontal bar graph at bottom showing sequence length 98 | for (int idx = 0; idx < GRID_SIZE; idx++ ) 99 | { 100 | if (( idx == record_led ) && (record_led_on)) 101 | { 102 | if (set_grid_led(idx, LED_RED)) 103 | return true; 104 | } 105 | else if ((record.initial_button == idx)&& (record_led_on)) 106 | { 107 | if (set_grid_led(idx, LED_GREEN)) 108 | return true; 109 | } 110 | else if ((idx > 55) && (idx <= 55 + record.current_step)) 111 | { 112 | if (set_grid_led(idx, LED_YELLOW)) 113 | return true; 114 | } 115 | else 116 | { 117 | if (set_grid_led(idx, LED_OFF)) 118 | return true; 119 | } 120 | } 121 | return false; 122 | } 123 | 124 | 125 | -------------------------------------------------------------------------------- /record.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef RECORD_H 19 | #define RECORD_H 20 | 21 | //record handlers 22 | void record_setup(); 23 | void record_start( const byte voice ); 24 | void record_button_down ( const byte button); 25 | boolean record_led_update(); 26 | 27 | 28 | #endif 29 | -------------------------------------------------------------------------------- /tempo.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #include "tempo.h" 19 | #include "led.h" 20 | #define TEMPO_MAX 240 21 | #define TEMPO_MIN 40 22 | boolean external_clk = true; 23 | byte clk_divider = 0; 24 | unsigned int tempo = 120; //range 40 to 280 25 | const byte digits_3_by_6[10][18] 26 | ={{ 27 | 0,1,0, 28 | 1,0,1, 29 | 1,0,1, 30 | 1,0,1, 31 | 1,0,1, 32 | 0,1,0 33 | },{ 34 | 0,0,1, 35 | 0,1,1, 36 | 0,0,1, 37 | 0,0,1, 38 | 0,0,1, 39 | 0,0,1 40 | },{ 41 | 0,1,0, 42 | 1,0,1, 43 | 0,0,1, 44 | 9,1,0, 45 | 1,0,0, 46 | 1,1,1 47 | },{ 48 | 1,1,1, 49 | 0,0,1, 50 | 1,1,0, 51 | 0,0,1, 52 | 0,0,1, 53 | 1,1,0 54 | },{ 55 | 1,0,1, 56 | 1,0,1, 57 | 1,1,1, 58 | 0,0,1, 59 | 0,0,1, 60 | 0,0,1 61 | },{ 62 | 1,1,1, 63 | 1,0,0, 64 | 1,1,0, 65 | 0,0,1, 66 | 1,0,1, 67 | 0,1,0 68 | },{ 69 | 0,1,1, 70 | 1,0,0, 71 | 1,1,0, 72 | 1,0,1, 73 | 1,0,1, 74 | 0,1,0 75 | },{ 76 | 1,1,1, 77 | 0,0,1, 78 | 0,1,0, 79 | 1,0,0, 80 | 1,0,0, 81 | 1,0,0 82 | },{ 83 | 0,1,0, 84 | 1,0,1, 85 | 0,1,0, 86 | 1,0,1, 87 | 1,0,1, 88 | 0,1,0 89 | },{ 90 | 1,1,1, 91 | 1,0,1, 92 | 1,1,1, 93 | 0,0,1, 94 | 1,0,1, 95 | 0,1,0 96 | }}; 97 | const byte digits_2_by_6[3][12] 98 | ={{ 99 | 0,0, 100 | 0,0, 101 | 0,0, 102 | 0,0, 103 | 0,0, 104 | 0,0 105 | },{ 106 | 0,1, 107 | 1,1, 108 | 0,1, 109 | 0,1, 110 | 0,1, 111 | 0,1 112 | },{ 113 | 1,1, 114 | 0,1, 115 | 0,1, 116 | 1,0, 117 | 1,0, 118 | 1,1 119 | }}; 120 | #define EXT_CLK_ICON_SIZE 48 121 | const byte external_clock_icon[EXT_CLK_ICON_SIZE] 122 | { 123 | 0,0,0,0,0,1,0,0, 124 | 1,1,1,1,1,1,1,0, 125 | 1,1,1,1,1,1,1,1, 126 | 1,1,1,1,1,1,1,0, 127 | 0,0,0,0,0,1,0,0, 128 | 0,0,0,0,0,0,0,0 129 | }; 130 | //////////////////////////////////////////////////////// 131 | IntervalTimer myTimer; 132 | int metro = 0; 133 | void timer_metro() 134 | { 135 | metro = 1; 136 | } 137 | void set_metro(unsigned int interval_ms) 138 | { 139 | myTimer.begin(timer_metro, interval_ms); 140 | } 141 | /////////////////////////////////////////////////// 142 | void tempo_edit_start() 143 | { 144 | grid_led_update = true; 145 | } 146 | 147 | boolean tempo_update_led() 148 | { 149 | const unsigned int left_digit = tempo/100; 150 | const unsigned int middle_digit = (tempo - (left_digit*100))/10; 151 | const unsigned int right_digit = tempo%10; 152 | // draw the external clock icon 153 | if (external_clk) 154 | { 155 | for (int idx = 0; idx < EXT_CLK_ICON_SIZE; idx++) 156 | { 157 | if (external_clock_icon[idx]==1) 158 | { 159 | if (set_grid_led(idx,LED_GREEN)) 160 | return true; 161 | } 162 | else 163 | { 164 | if (set_grid_led(idx,LED_OFF)) 165 | return true; 166 | } 167 | } 168 | } 169 | else //draw digits 170 | { 171 | byte led_idx=0; 172 | for (byte y = 0; y < 6; y++) 173 | { 174 | for (byte x = 0; x < 2; x++) 175 | { 176 | byte pixel = (y*2)+x; 177 | if (digits_2_by_6[left_digit][pixel]) 178 | { 179 | if (set_grid_led(led_idx,LED_RED)) 180 | return true; 181 | } 182 | else 183 | { 184 | if (set_grid_led(led_idx,LED_OFF)) 185 | return true; 186 | } 187 | led_idx++; 188 | } 189 | for (byte x = 0; x < 3; x++) 190 | { 191 | byte pixel = (y*3)+x; 192 | if (digits_3_by_6[middle_digit][pixel]==1) 193 | { 194 | if (set_grid_led(led_idx,LED_YELLOW)) 195 | return true; 196 | } 197 | else 198 | { 199 | if (set_grid_led(led_idx,LED_OFF)) 200 | return true; 201 | } 202 | led_idx++; 203 | } 204 | for (byte x = 0; x < 3; x++) 205 | { 206 | byte pixel = (y*3)+x; 207 | if (digits_3_by_6[right_digit][pixel]==1) 208 | { 209 | if (set_grid_led(led_idx,LED_GREEN)) 210 | return true; 211 | } 212 | else 213 | { 214 | if (set_grid_led(led_idx,LED_OFF)) 215 | return true; 216 | } 217 | led_idx++; 218 | } 219 | } 220 | } 221 | for (int idx = 0; idx < GRID_WIDTH; idx++) 222 | { 223 | if (idx <=clk_divider) 224 | { 225 | if (set_grid_led(48+idx,LED_GREEN)) 226 | return true; 227 | } 228 | else 229 | { 230 | if (set_grid_led(48+idx,LED_OFF)) 231 | return true; 232 | } 233 | } 234 | byte bottom_row[8]={LED_RED,LED_YELLOW,LED_GREEN,LED_GREEN,LED_YELLOW,LED_RED,LED_OFF,LED_GREEN}; 235 | for (int idx = 0; idx < 8 ; idx++) 236 | if (set_grid_led(56+idx,bottom_row[idx])) 237 | return true; 238 | return false; 239 | } 240 | 241 | void tempo_button_down( const byte button ) 242 | { 243 | //second bottom row is divider controller 244 | if ((button / 8 ) == 6) 245 | { 246 | clk_divider = (button % 8); 247 | unsigned int sped= 60000 / (tempo * 8); 248 | sped *= (1+clk_divider); 249 | myTimer.begin(timer_metro, sped*1000); 250 | } 251 | else if((button / 8 ) == 7) //tempo up down buttons and ext clock button 252 | { 253 | byte which = (button % 8); 254 | if (which == 0)//-100 255 | { 256 | if (tempo > 140) 257 | tempo -= 100; 258 | else 259 | tempo = TEMPO_MIN; 260 | } 261 | else if (which == 1) 262 | tempo -= 10; 263 | else if (which == 2) 264 | tempo -= 1; 265 | else if (which == 3) 266 | tempo += 1; 267 | else if (which == 4) 268 | tempo += 10; 269 | else if (which == 5) 270 | tempo += 100; 271 | else if (which == 7) 272 | { 273 | if (!external_clk) 274 | external_clk = true; 275 | else 276 | external_clk = false; 277 | } 278 | if (tempo < TEMPO_MIN) 279 | tempo = TEMPO_MIN; 280 | if (tempo > TEMPO_MAX) 281 | tempo = TEMPO_MAX; 282 | unsigned int clck_hi_ms = 60000 / (tempo * 8); 283 | clck_hi_ms *= (1+clk_divider); 284 | clck_hi_ms *= 1000; 285 | set_metro(clck_hi_ms); 286 | } 287 | grid_led_update = true; 288 | } 289 | 290 | -------------------------------------------------------------------------------- /tempo.h: -------------------------------------------------------------------------------- 1 | /* 2 | plexus - a launchpad cv/gate sequencer/keyboard/arpeggiator 3 | Copyright (C) 2017 Dougall IRVING 4 | 5 | This program is free software: you can redistribute it and/or modify 6 | it under the terms of the GNU General Public License as published by 7 | the Free Software Foundation, either version 3 of the License, or 8 | (at your option) any later version. 9 | 10 | This program is distributed in the hope that it will be useful, 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | GNU General Public License for more details. 14 | 15 | You should have received a copy of the GNU General Public License 16 | along with this program. If not, see . 17 | */ 18 | #ifndef TEMPO_H 19 | #define TEMPO_H 20 | #include "definitions.h" 21 | //metro timer 22 | extern int metro; 23 | void set_metro(unsigned int interval_ms); 24 | //tempo edit handlers 25 | boolean tempo_update_led(); 26 | void tempo_button_down( const byte button ); 27 | void tempo_edit_start(); 28 | #endif 29 | --------------------------------------------------------------------------------