5.Bridge
5.1Introduction
This section covers the design goals, architecture, firmware source code modules and configuration options for the PRoC™ LP bridge. It does not cover the details of the radio subsystem or the config- uration options that go with it.
5.1.1Design Features
The CY4672 Reference Design Kit uses PRoC LP CYRF69213 for the bridge. Contact your local sales representative for more information on the PRoC LP controller.
The architecture was designed to be modular for extendibility and maintainability. It was also designed so that it could easily be ported from one hardware platform to another assuming the use of an equivalent microprocessor. Porting to another microprocessor requires more work to account for the USB hardware support and other hardware specific changes.
Design efforts have been made to reduce the ‘on time’ of the microprocessor and radio to conserve battery life of attached devices. This includes protocol optimizations along with using sleep features of the PRoC LP.
5.2Hardware Overview
The PRoC LP bridge is provided with the RDK. This bridge may be plugged into the USB port on a PC to provide the Wireless USB bridge functionality. The bridge firmware is written in C and assem- bly code, and runs on the
The bridge connects the remote RoC LP HID’s to a
Packets similar to standard USB HID packets are encapsulated inside wireless PRoC LP packets, which also contain a packet header and CRC to help the bridge correctly process the USB HID data packets. Valid packets are then sent via USB to the USB host.
CY4672 Reference Design Guide, Document # | 75 |
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