Ezusb2131-1.0.rar

These example programs explore some of the intricacies of the EZ-USB controller. All of them are distributed under the GPL license and come without any warranty of any kind, not even the implied warranty of merchantability or fitness for a particular purpose. All programs have been successfully compiled with AS31. The schematic and PCB were drawn with Eagle. A free demonstration version (but more than useable for small projects, and even available for Linux) can be downloaded from: www.cadsoft.de. *led2.asm Basic test. Demonstrates the usage of the ports and how to set-up the various registers and how to write data to a port. *button.asm Simple test. A led follows the state of a button. *buttonint.asm Slightly more complex variation. It uses the extra interrupts provided by the chip and demonstrates how to read and write from/to a port. *encoder.asm A simple way to decode a rotary encoder. Interrupt driven and combines the techniques from the previous examples. *LCD.asm Some routines to interface with a standard LCD-module. Not the prettiest in their kind but it works. And yes, the 3.3V controller can interface with the 5V module without any further provisions. Although native 3.3V LCD-modules exist. *I2C.asm My masterpiece ;-). It demostrates the use of the I2C interface with an external EEProm. Also shown is how to use the twin dptrs of the EZ-USB chip. But more importantly, the program contains a bootloader! It actually programs itself, according to the rules stipulated by the EZ-USB lootloader protocol, into the external EEProm. After it has run once, it disables itself leaving you with a programmed and self-starting controller. Thus making the unit operate without having to download the code after every power-up. This is intended for stand-alone applications, like my own. (Note that the programming process takes a minute or so. Please be patient.) More information in the actual source code itself. Beware! The schematic included is NOT public domain! It is included for your reference only. It may only be used and distributed under a GPL license. Furthermore, there will be glitches here and there. It works with the examples provided and can serve as a guide on how to connect the controller in a working fashion. Again both the schematic as the adapter board come without any warranty of any kind, not even the implied warranty of merchantability or fitness for a particular purpose. All of this is (a small) part of my graduation thesis. My promotor has given me the right to make everyting public, under GPL. I may even do so using my own name. What isn't here is propriatary. It's that simple. Have fun! Greetings, Tom De Rybel