Chameleon-AVR Nurve Networks, Chameleon-AVR Datasheet - Page 181

• 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”
what’s inside. If you look inside the file, you will see nothing other than a conditional compilation section and the
prototypes for the function API, so where are all the register interface defines? Well, remember we have to keep all the
SPI commands in a single place, so the register interface are actually message ids for the SPI messaging system! Thus, if
you open up CHAM_AVR_TWI_SPI_DRV_V010.h and scroll down then you will get to the section with the register
interface messages for the GFX driver itself, they are:
Each register is actually a message to the SPI driver, so we cleverly pass these register access requests right thru and
tunnel them thru the SPI interface. Now, there are a lot of registers (37 to be exact currently), but they are all more or less
self explanatory if you read the comments. To start, we see a couple lines at the top:
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