Chameleon-AVR Nurve Networks, Chameleon-AVR Datasheet - Page 182

• 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”
These are important since they give the base offset for these commands 192, and there are 37. So from 192 to (192+37-
1) we know are graphics commands. Thus, in the graphics driver, it will get these messages since the SPI message
dispatcher is looking for this range. If we open up the Default2 driver, we can see this as shown below:
The yellow highlighted code is in the Default2 SPI message dispatcher, as you can see this highlighted section “catches”
all the graphics function calls/messages and pipes them to yet another function call inside
CHAM_GFX_DRV_001_TB_001.SPIN which is the actual graphics driver! Now, let’s take a quick peek into that:
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