AC Sensorizer sensorizes up to 8 sensors and interpolates its AIN-readings. The main target of this application are sensoric devices delivering not exactly 0 - 5 V, like pressure-, distance-, resistor-based sensors or softPots.

This is a preliminary beta-release.
Use and build at your own risk!
There will be major improvements in the GUI/HUI within the release of the next version. Though the code basis (ACSensorizer.c) won't probably change that much… – audiocommander

Picture Gallery: http://www.audiocommander.de/picBrowser/picBrowser.php?go=galleries/060827_sensorizer&thumbs=1&thumbsize=XL

Demo-Video 1: http://www.audiocommander.de/picBrowser/galleries/060827_sensorizer/,m5_smp01_billig-short.mov
Demo-Video 2: http://www.audiocommander.de/picBrowser/galleries/060827_sensorizer/,m5_smp02_iwnh-short.mov

audicommander's YouTube Video Page: http://www.youtube.com/profile?user=audiocommander

Note:
The Sensorizer is attached to a Computer which converts the Controller Messages – produced by the Sensorizer – to harmonized and clock-synchronized Note-Signals. I'm using Absynth Sounds …but due to the buggy versions and ugly customer support from NI, I discourage everyone using NI-products :( As soon as I have enough money, I'll switch to Virus :)

• supports up to 8 sensors, code can be adapted to use more (eg with PIC18F4620)
• enable/disable single AINs
• slowdown: slows down the signal and increases the gaps between generated values
• assignable CH and Controller-Number
• sense-min: 10bit value, ignores every signal below
• sense-max: 10bit value, ignores every signal above
• sense-factor: used for signal interpolation… uses fast bitshifting or complex division depending on value
• AUTO-sense feature: auto-calibration of sensor, detect MIN/MAX by sensing automatically adapts sense-factor!
• scale from and scale to: scales the output value from/to
• invert signal
• pedal modes:
  • filter ⇒ only forward if pedal down;
  • panic ⇒ send panic on release pedal;
  • combinations of all pedal mode options are possible
• detect release: send 0-value if signal drops below sense-min
• bankstick support: 1 connected bankstick provides 2 banks with 127 patches each
• midi configurable: full configuration possible with NRPN-messages
  • NRPN-MSB CC99 for sensorSelect / sysEx mode
  • NRPN-LSB CC98 for controlType
  • DataEntry MSB CC6 and LSB CC38 for controlValue
• LCD-Output (2×16 or -recommended- 4×20)
• HUI-Input to control up to 4 sensors with 8 switch-encoders, pedal, store- & panic-button in 2 modes (PLAY/SETUP)
• ACSim Console Debugger: code integrated and ready to use configured for XCode2
  • select “ACSim” as target and test the application via command-line
  • inspect variables with a (graphical) debugger (GDB support within XCode2)
  • visit http://www.midibox.org → there's a tutorial how to use Code::Blocks

MBHP Modules:

• one MBHP_CORE module
• one MBHP_LCD module (5×20 optimized, 2×16 available)
• one MBHP_DIN module for
  • 8 Encoders (preferrably with):
  • 8 pushButtons
  • 1 mode-select switch
  • 1 pedal (optional)
  • 1 PANIC button (optional)
  • 1 STORE button (optional)
  • 1 UP & 1 DOWN button (optional)

Sensors:

• up to 8 (default: 4) sensors connected to unmuxed AIN (J5 of MBHP_CORE). Note that sensors 5 to 8 can only be configured via MIDI by sending NRPN-messages

• m5 sensorizer v 0.2.4 (348 kB), download from http://www.audiocommander.de
• readme.txt …you should really read this, even if you're not recompiling the software!

Version History

• 0.2.2:
  • initial release
• 0.2.3:
  • removed MidiTrough and used MIOS_Merger
  • some minor bugs
  • two example miniAudicle/Chuck NRPN scripts are now included
• 0.2.4:
  • fixed severe bank select bug that prevented accessing even banks

Compiling Notes

The application can be recompiled with a variety of strictly separated #define- options. For example setting SENSORIZER_INTERFACE_HUI to 0 compiles the application without hardware input controls and therefore reduces the file- and application space. Compiling without HUI, BANKSTICK, NRPN-Config and LCD generates code with approx. 3 or 4 pages; compiling with all options will result in an application file of approx. 12 to 14 pages.

All Sensorizer parameters can be controlled and set by sending NRPN messages by MIDI:

1. Send NRPN MSB (Controller# 99) to select control type
2. Send NRPN LSB (Controller# 98) to set the control parameter
3. Send NRPN Data MSB (Controller# 6) and NRPN Data LSB (Controller# 38) to set the parameter value

Table A: Control Types

Table B: Control Parameters

The design of the Encoders is about to change with the next version. I just had one DIN at hand and the whole project had to be finished in time; with a second DIN and 4/5 more Encoders, everything will be a bit handier…

If you build the Sensorizer with enabled HUI-mode, it provides configuration possibilities for 4 sensors. However, you could change the code easily to support all 8 sensors.

Used Hardware:

• 1 Mode-Switch button (PLAYMODE ↔ SETUPMODE)
• 8 Encoders with Switch, two Encoders per sensor, the first row of encoders is called ENC_MIN, the lower ENC_MAX
• 4 Buttons (UP, DOWN, STORE, PANIC)

Table C: Encoder Controls

m5_sensorizer supports writing and reading to a connected bankstick.
Each patch consists of 2 pages ˆ 64 bytes ⇒ 128 bytes
2 banks with 128 patches each are available per 1 connected bankstick

Sending a PRG_CH message in PLAYMODE [P] loads the corresponding patch.
Sending a PRG_CH message in SETUPMODE[S] sets the corresponding patch without loading the patch data. Use this behavior to copy patches.

Choose the appropriate bank by sending a Coarse-Adjust Bankselect (CC#0).
In HUI-Mode, switching a bank on the device also sends the current Bank/PRG.

Memory-map of one patch:

Table D: Bankstick Patch Content

Patch addresses are: (patch * 0x80)
or PIC-optimized: (unsigned int)patch « 7

Example hex-output of patch#0:

**MIOS_BANKSTICK_WritePage at 0x0 
0:     02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
16:    00 00 00 00 00 00 00 00 80 80 80 80 40 08 00 00  ............@...
32:    00 00 00 00 04 04 04 04 14 15 16 17 00 00 00 00  ................
48:    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................

**MIOS_BANKSTICK_WritePage at 0x40 
0:     08 08 08 08 00 00 00 00 04 04 04 04 00 00 00 00  ................
16:    00 00 00 00 7f 00 00 00 40 40 40 40 7f 00 00 00  ........@@@@....
32:    03 03 03 03 00 00 00 00 70 70 70 70 40 40 40 40  ........pppp@@@@
48:    00 00 00 00 00 00 00 00 7f 7f 7f 7f 00 00 00 00  ................

More details can be found in the readme.txt!
This site is about to change while the Sensorizer is beeing developed further!

have fun! – audiocommander