Chameleon-AVR Nurve Networks, Chameleon-AVR Datasheet - Page 220

• Manufacturer Part Number: Chameleon-AVR
• Description: MCU, MPU & DSP Development Tools AVR8 & PROPELLER DEV SYSTEM (SBC)
• Manufacturer: Nurve Networks

Specifications of Chameleon-AVR

• Processor To Be Evaluated: AVR 328P
• Data Bus Width: 8 bit
• Interface Type: USB, VGA, PS/2, I2C, ISP, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 NURVE NETWORKS LLC “Exploring the Chameleon AVR 8-Bit”
Controls Required:
None.
Technical Overview
The demo simply uses both the NTSC and VGA terminal API functions to print “Hello World” on both screens and scroll.
Here’s just the main() / loop() excerpt since this demo is nothing more than a copy of the NTSC and VGA versions
respectively and merged.
The demo simply uses the same basic commands, but send them to both the NTSC and VGA monitors.
Summary
This demo shows how easy it is to get both NTSC and VGA terminal like text output going on the Chameleon.
28.1.6 VGA Star Field Demo
The default2 VGA driver isn’t as impressive as the NTSC driver. In fact, its pretty boring. Its good for displaying text and
acting as a terminal output, but that’s about it. However, with a little ingenuity we can make it do some cool things! This
little demo, draw stars on the VGA screen on the last display line, this causes the screen to scroll and presto – animated
star field! Then on top of the star field a little character based ship is drawn. Figure 28.6 shows the demo in action.
Figure 28.6 – VGA terminal text graphics demo – Star Field.
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