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January 27 2010

frickelsuppe

3310 SPI LCD library for the Xmega MCUs

I'm just working on a LCD library for the 3310 LC-Display. One big advantage of this display is the simple communication interface (SPI in this case). It can be easily interfaced with ATmega MCUs but the ATxmega are a bit different. It's able to display 1-bit (black and white) graphics on a resolution of 48 x 84 pixels.

The current code is really dirty and partially based on a source code I've found at mikrocontroller.net. The final (public) version will be completely different with much more functionality (like small, normal, big, bigger fonts, basic shape drawing..).

Tags: announcement lcd code atxmega

January 20 2010

frickelsuppe

Project announcement - HomeController v0.1 prototype

I've been working on a minimal home automation project. I've already finished the schematics and PCB layout. The project is AVR-based (ATMega32) and is fully stackable via a 2-Wire Interface. The ~28 I/O Ports (including analog inputs) are controlled via RS232. The software being developed is designed for Unix-like Operating System, but it should work on MinGW.

Well, there is one tiny bug in the prototype (Murphy's Law). The RxD-Line of the ATMega isn't connected to the MAX3232. This has to be fixed with a wire. Unfortunately this can't be fixed in the PCB layout in a nice way, because KiCad (The Open Source EDA suite I'm using) doesn't support moving traces.

I've already sent the Gerber-files to BatchPCB. Unfortunately the prototype PCB will be about $69. For that reason I'll make a re-design (SMD) soon.

What does it do?

You can control lights and other stuff with it using your PC or a Microcontroller. It's also suitable for playing around with AVR Microcontrollers. Nearly all pins of the Microcontroller are located on a screw terminal, so it's perfectly suited for quick deployment.

Tags: hardware announcement atmega
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