This report is the written part of a bachelorthesis on the computer engineering program at
University of Halmstad. The project was a cooperate project that where done together with
Free2move Holding AB. Free2move is a company with eight employees in Sweden and four in
Malaysia. The company is today developing Bluetooth modules and RFID chips. The market for
this kind of products is growing very rapidly, last year it grew 71 percent. The most important
market for Free2move is to provide other developers with Bluetooth modules.
Free2move has recieved some inquiries from previous customers about a system that would allow
communication between two or more persons. After recieving this, Free2move started to evaluate
the grounds for such a protocol and also how the transmisison time slots should be distributed
among the parties. The result was planned to manage an infinite number of users and the possibility
for two users to talk simultaneously.
The goal of the project was to develop a prototype of a reciever with functionality according to a
specification and protocol developed by Free2move. One part of the project where to do a research
of the market to find suitable hardware for the reciever, at least a tranciever/reciever and a processor
with DA-converter. Factors such as pricing, power cousumption and size should be take in
consideration during the researchphase.
Free2move had explicity said that they where intrested in a microprocessor from Texas that had low
power comsumption and that we should concider takingthat one. The PIC microprocessor from
Micrichip was one of the other candidates. Since the specification of the protocol demanded a DAconverter
with 16 bit resouliton an external codec was neccesary to be implemented in to the
construction.
During the project negotiations about the structure and functionality of the protocol where still not
finished. This resulted in a tu...
