David Merrill

Code to Share: Here are various pieces of code and bits of wisdom that I've written as part of my coursework. As an open-source enthusiast, I am making them available to the general community. If you use them, please keep my name in the comments and drop me an email. If you improve them, please let me know - and send me a copy of the updated code. Enjoy!

PD Patches and abstractions

Pure Data website

sampletrigger~.pd: loads and plays back a wav file sample, with optional looping
clamp_lower.pd: imposes a lower bound (clamp) on incoming numbers.
clamp_upper.pd: imposes an upper bound (clamp) on incoming numbers.
clamp_range.pd: imposes a lower and upper bound (clamps) on incoming numbers. (note : the built-in [clip] object does this, oh well)
squareosc.tar: square wave generator (someone sent this to me - can't remember who..)
joystick.zip: Joystick external for Win32

Crossbow ADXL232 Accelerometer board utilities

ADXL.zip: java classes for polling and handling data from the ADXL232 evaluation board device

note: To use the ADXL classes, you will need the Java serial communication library for win32, which you can download this from the following page at SUN Microsystems. If you have trouble getting Java talking to the comport in win32, have a look at this. extras.

Tactile Trackpoint utilities

Java library for pulsing the tactile trackpoint under program control.
Sample program for demonstrating synchronous audio, video, and tactile interactivity (written in C).
Sample program for tactile visualization of height information in an image (uses the above Java library).

trackpoint notes:

tactile trackpoint utilities require that you have a tactile trackpoint device.
You also need to install the latest trackpoint driver, which can be found here
If you are using the handheld tactile trackpoint, plug it in after you start Windows

Microcontroller code for handling PS/2 communication

C code for reading a single PS/2 byte, and you can find more information about PS/2 communications here.

C header files for the Pod 2.0 and MIDI

this file will aid in any software project that controls the Line6 Pod 2.0 via MIDI
this file will aid in any software project that uses MIDI

Graphics Stuff

I tried out the GLOW widget toolkit, and here are my notes for getting it working in MS Visual Studio 6.0