• 32 step 8 track drum seq, each step has trig/acc/roll
• one track can be used as note track for bass sequencing
• independant length/tempo divisor for each track, all can be synced to a master track
• 8 banks of 16 patterns
• patterns are saved on a bankstick
• settings are stored on internal eeprom
• song mode
• all functions can be executed while running
• forward/backward playing direction
• 24 PPQ resolution
• midi clock master/slave (maybe also taptempo)
• sysex functionality

• lcd: displaying (bpm pat trknr edited_par)
• 32 step buttons + stepleds, leds are dual color to display trig/acc
  • step edit behaviour: step off/trig/trig+acc
  • all functions are accessed with a stepkey + shift combination
  • pattern selection: stepkey + pattern button
  • track select/mute: stepkey + track button

• rotary encoder for bpm, also used for editing values

• Step button layout:
  • Track layer

trk button + track select: solo track track select + play button: manually trigger note

• Pattern layer

• Function layer

• first prototype
• new layout design
• ledmatrix/buttonmatrix finished (see matrix page)
• frontpanel finished/wired
• first take on controll surface handler (step, track and pattern handling)
• sequencer works, timing is not stable yet
• made a temporary case
• fixed flickering leds when pushing a button
• bankstick error handling added
• default pattern is loaded when no BS is available at startup
• independant length/divider for each track implemented
• LCD optimalisations
• loading and saving of patterns works now
• backward playing direction implemented
• midi mode implemented with simple slave mode (no interpolation)
• improved bpm handling (pattern bpm is saved with pattern)
• fill function implemented
• CS interface improved (the edit functions are now accessed with stepbutton+shift)
• settings are saved in internal eeprom
• notetrack implemented, this track will be used to program basslines
• changed data structure, new pattern is 256bytes
• cs is updated for notetrack (shift + track selects notetrack)
• shift + stop resets the song position
• due to code/ram space limitations the project is ported to a pic18f4620
• the core board was modified so that the backlight can be controlled by the software
• new bankstick routines to handle the larger pattern size
• 2 new functions added: Seq Reset and Backlight mode
• CC layer added
• tracks don't go out of sync after changing divisor
• the note track now has a note length parameter
• pattern banks are implemented
• new function: shift track
• the note-on status of tracks is displayed in the track layer
• note-off handling when seq is stopped added
• the pattern bpm is now loaded when the seq is not running
• 0.7e
  • pattern banks implemented, bug fixed in bankstick routines
  • manual trigger and solo implemented
  • basic sysex support
  • songmode now works
  • note length implementation for note track
  • it is now possible to sync pattern changes to begin of pattern
  • lots of core tick optimalisations
  • obsolete functions removed

Most of the code is written in C

the software will be based on the midibox clockbox example ^uCApps

• Data structure

• Application code
  • Bankstick (updated)
  • Control surface
  • Sequencer core
  • Sequencer get/set and helper rountines

• you can find DSEQ32 v0.7e here

• the doxygen generated documentation is available here

Components:

• CORE module CORE Module ^uCApps
• DOUTX3 DOUT Module ^uCApps
• DINX1 DIN Module ^uCApps
• BANKSTICK BANKSTICK Module ^uCApps

The leds/buttons are wired in a matrix configuration to reduce the number of DIN/DOUT modules needed DSEQ32_matrix

• Assembly of frontpanel

• Painting the case

• Assembly after painting

• Finished hardware

First prototype:

forum topic

used for development of data structure, bankstick code, sequencer core

New version:

• Construction of frontpanel
• Wiring of the 32 step leds/buttons
• Testing of the step buttons with the SM_example application
• Testing of the step leds with modified SM_example app (modified version includes leddriver)
• Development of user interface code
• Button and led handling finished
• The flickering led problem is solved with MIOS v 1.9c
• Encoder handling works, but there's still a small bug
• Updated LCD layout for new functions
• The leds to indicate play/save/vel/special function button work now
• Some LCD optimalisations

• Development of seq code
• Sequencer edit functions work as expected
• Sequencer runs!
• Fixed sequencer mute track bug
• Some tracks didn't send the note off messages correctly, corrected
• Bankstick error handling added
• Default pattern is loaded when no BS is available at startup
• Note length/divider is implemented
• Independant length/divider for each track

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