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I now know for certain what I am going to use, therefore answer your questions better :
XBee 2mW Wire Antenna - Series 2 ( ZB )
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From the manals:
http://www.sparkfun.com/products/10414 ftp://ftp1.digi.com/support/documentation/90000976_g.pdf Easy-to-Use
* No configuration necessary for out-of box
* AT and API Command Modes for configuring module parameters
So the device looks like a modem.
I didn't read the data sheet completely, but you should. I suspect all you need is a UART in your FPGA.
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Unfortunately, I have no experience whatsoever with Linux, nor with NIOS.
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The Zigbee protocol is taken care of in the module, so I don't think you need to understand the Zigbee stack.
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How am I implementing ZigBee in Quartus?
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You don't. You implement a NIOS II processor and a UART. You read the data sheet for the Zigbee module and determine what serial commands you need to send to the UART. On your robot, you will have another Zigbee module and another device with a UART, eg., a microcontroller. The fact that the communications is Zigbee is hidden from your devices by the Zigbee modules.
Cheers,
Dave
Honored Contributor
