MIOS - the MIDIbox Operating SystemStatus|| || Done: || 0%| o new PIC18F instructions learned || o performance of PIC18F452 evaluated || o first concepts for an uniformed MIDI system, based || on experiences from MIDIbox controllers, sequencer, synth || o quick&dirty port of MIDIbox16e firmware in order to learn || more about the pitfalls with the new controller || o LC protocol machine (will be moved to application layer later) || o Bootstrap loader written which allows to upload the firmware || via MIDI. Performance: 1k = 400 mS, 32k (whole flash) in 13 s || o perl script written which converts .hex to .syx || o new interrupt driven, buffered MIDI Tx/Rx driver written || buffer overruns are prevented || o generic MIDI protocol machine written || o generic MIDIbox Link support implemented || o MIDI processor which allows to map up to 256 MIDI events to || control elements (Pots/Fader, Encoders, Buttons, LEDs, ...) || Result: list of 256 events is processed in 300 uS @ 40MHz || (PIC16F: more than 2 mS @ 20 MHz) || o generic shiftregister In/Out driver || o 2 exact user timer hooks for timing driven code (sequencer, || SID softwaresynth part) || o generic rotary encoder driver. Results: 16 encoders are || scanned within 100 uS, 64 encoders within 400 uS || (excellent performance for the MBSID Control surface :-) || o generic interrupt driven analog inputs driver, every 200 uS || one of 64 pots is sampled in background, || w/ adjustable jitter filter, resolution: 10 bit || o unified, 2-layer LCD driver implemented: || The first layer accesses the LCD hardware directly. Currently || two hardware models are provided: graphical LCDs based on || KS0108 or compatible chips, and dotmatrix (character) || LCDs based on HD44780 or compatible. || Other graphical LCDs will be supported later, for dotmatrix || displays (1x8, 1x16, 2x16, 2x20, 4x20, 2x40, 4x40) || no additional changes are required. || The second layer is used by the applications to print || characters, print hexadecimal and BCD values, print strings || and to show temporal info messages for some seconds. || By using only the upper layer, applications written for dotmatrix || displays will also run with graphical LCDs and vice versa, so || long as no graphical elements are used. || A X-offset for up to 4 lines can be specified in order to || center the screen if necessary. || o an exact millisecond-counter has been integrated || o an exact millisecond-delay has been integrated || o a flexible font/picture manager has been added which || provides an indexed access to characters and || animated icons || o a motorfader driver for up to 8 unmuxed analog inputs || has been implemented. Resolution of fader positions: 10-bit. || The motor speed is controlled by pulse-wide modulated signals || Speed resolution: 5bit (32 speed levels) || WOW! I haven't expected that higher resolutions make such a || big difference compared to the MIDIbox MF driver which works || with the standard 7-bit resolution/16 speed levels || o a suspend function for motorfaders have been implemented. It's || usefull in conjunction with touchsensors || o memory access routines (read/write Flash/EEPROM/BankStick) || with lifetime-saving and error detection features have been || implemented || o a secondary bootstrap loader has been implemented which allows || to upload a user application during the operating system is || running. Overwrite of primary loader and OS will be prevented || o documentation of user functions started (more than 100 || functions available - ca. 10000 lines of assembler code - || 12k flash memory allocated by OS) || o suspend/resume functions for user and system task have been || implemented. Also a "warmboot" is supported now || o a debug interface has been implemented which is accessible || by SysEx commands. It allows to read/write the RAM and || and to call public MIOS functions. The planned Java-based || diagnostic terminal will use these commands later to || control the operating system via remote. Btw.: on this way || the MIDIbox could also be fully controlled via TCP/IP over || your Intranet or the Internet! ;-) || o all written routines have been sorted || o MIOS has been divided from the application layer || o the Logic/Mackie Control emulation has been ported to MIOS. || No problems so far. || It seems that only one core module is required to perform || the complete emulation (graphical LCD, 8 motorfaders, || 9 encoders, 8 LED rings, 96 buttons, 64 LEDs), but I have to || change the wiring of my MIDIbox LC to ensure this. || o wiring changed - no performance impact noticed - perfect :) || o a Functions Reference has been generated || o first release of MIOS: done || o MIDIbox LC application (open source) || o MIDIbox HN (Houston) application (open source) || o finally the bootstrap loader and upload procedure has been || documented || o the first "toy of the week" has been released: a Magic MIDI Delay || o I've heart the first noise from my MIDIbox SID/18F :-) || o I've heart plenty more noise from my MIDIbox SID/18F || performance is great! || enough CPU power free for the control surface and some AOUTs || o an imperfection of MIOS V1.0 and the bootstrap loader has been || fixed which appeared when realtime messages like MIDI clock || and Active Sense were send during the upload of new code. || The encoder handler sometimes left out a increment due to || a missing codeline (copy&paste error ;-) || These issues are solved now in mios_v1_0b and || mios_bootstrap_loader_v1_1 (please update!) || o Hint for MIDIbox LC users: if you notice that the motorfaders || don't move smoothly, increase the MIDI bandwidth in Logic || to 100% under Preferences->Control Surface->Settings || Now it's also recommended to increase the motorfader supply || voltage to 8V and to set the MF Calibration value to 0x0e || o MIDIbox SID (without control surface) application has || been released. || o Toy of the week: MIDIbox Tiny Control (TC) || o MIOS V1.1 has been released (see ChangeLog) || o An introduction page has been written. || o Step A of the MIDIbox SID control surface has been completed || o some more examples have been uploaded (AIN/Enc/MF) || o new release of MIDIbox LC V1.1.2 || o Bugfix for MIOS bootstrap loader (new release v1.1b): incoming || Note/Controller/etc. events during startup prevented MIOS || from booting. Now the loader ignores all MIDI messages || with the exception of his own SysEx string || o new release MIDIbox LC V1.1.2b: horizontal bars for 2LCD option || o new release MBSID V1.4_stepA3: patch select and save function || o MIOS V1.2 has been released (see ChangeLog) || o MIOS V1.3 has been released (see ChangeLog) || o MIDIbox SID control surface Step ABC has been released || o MIOS V1.4 has been released (see ChangeLog) || o some new applications examples have been released || o the MIOS port of MIDIbox64 has been released || o MIOS V1.4b has been released (see ChangeLog) || o the MIOS port of MIDIbox64E has been released || o the MIOS port of MIDIbox MF has been released || o the MIOS port of MIDIO128 has been released || o the MIOS port of MIDImon has been released || o MIOS V1.5 has been released (see ChangeLog) || o MIOS V1.5b has been released (see ChangeLog) || o MIOS V1.6 has been released (see ChangeLog) || o the MIOS port of MIDIbox SEQ has been released || o MIOS V1.7 has been released (see ChangeLog) || || -++- ToDo: || || o more examples || o more documentation about the available MIOS hooks || o Java GUI to convert and upload .hex files via MIDI || o a diagnostics terminal with command interface to all functions || o MIDIbox NG || o ... || o ... || o ... || 100%| || \/  Last update: 2025-04-09 Copyright © 1998-2025, Thorsten Klose. 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