Chameleon-AVR Nurve Networks, Chameleon-AVR Datasheet - Page 159

• 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”
The next set of #defines are rather long, they represent all the current commands that the Propeller driver understands.
These commands each have a specific set of parameters and functionality that will be clarified when we review the
individual APIs for each class of messages; graphics, sound, keyboard, etc.
The commands are fairly straightforward and if there is anything that you want more detail on you can always open up the
Propeller driver file’s spin code and see exactly how the command is processed. Remember, all of these commands work
in the same way; they are sent over the SPI interface to a command dispatching loop on the Propeller, a large case
statement catches the commands and then sends it to the appropriate driver (graphics, sound, keyboard, etc.). So there
are a lot of commands, but each one is rather simple when you follow its complete path from the AVR to the Propeller to
the media driver itself.
The next subset of commands are specific to the default2 driver and support the added graphics abilities of the tile map
engine for NTSC modes. I wrote the tile engine to give you more performance and the ability to do some game like
applications. These commands are more complex and it will take a bit to explain them, but for now, just peruse them
below:
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