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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 2 of 2 (0.041 seconds)Spelling suggestions: "subject:"marcus ohlsson"" "subject:"marcus ohlssons""
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A Menu-based Universal Control Protocol / Ett menybaserat universiellt kontroll-protokollGustafsson, Per-Ola, Ohlsson, Marcus January 2002 (has links)
<p>This thesis-project aims to research the possibilities of new wireless technologies in general control-situations. We have studied different existing control protocols, and developed a new protocol focusing on textbased menus. Our protocol is scaleable, easy to implement, and platform- and media independent. Since our protocol supports Plug and Play with dynamically allocated id’s, it does not require a unique id in the hardware. </p><p>To test the protocol we have developed a prototype system, consisting of a mobile phone connected to a server, which in turn is connected to two slave units, controlling peripheral equipment on 220 Volt. </p><p>The phone is an <i>Ericsson T28,</i> equipped with a Bluetooth unit. The server is runningthe real-time OS <i>eCos </i>on an A<i>RM 7TDMI Evaluation Kit</i>, and the slave units consist of two developer boards equipped with <i>PIC-processors</i>. Communication between the phone and the server is done over Bluetooth. However we did not find a working Bluetooth protocol stack ported to eCos, so a serial cable was used instead. Communication between the server and the slaves is done over a RS-485 serial network which simulates the traffic over a radio-network. </p><p>The results show that our protocol is working, and that our system would be easy to implement, cheap to produce and very scalable.</p>
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A Menu-based Universal Control Protocol / Ett menybaserat universiellt kontroll-protokollGustafsson, Per-Ola, Ohlsson, Marcus January 2002 (has links)
This thesis-project aims to research the possibilities of new wireless technologies in general control-situations. We have studied different existing control protocols, and developed a new protocol focusing on textbased menus. Our protocol is scaleable, easy to implement, and platform- and media independent. Since our protocol supports Plug and Play with dynamically allocated id’s, it does not require a unique id in the hardware. To test the protocol we have developed a prototype system, consisting of a mobile phone connected to a server, which in turn is connected to two slave units, controlling peripheral equipment on 220 Volt. The phone is an Ericsson T28, equipped with a Bluetooth unit. The server is runningthe real-time OS eCos on an ARM 7TDMI Evaluation Kit, and the slave units consist of two developer boards equipped with PIC-processors. Communication between the phone and the server is done over Bluetooth. However we did not find a working Bluetooth protocol stack ported to eCos, so a serial cable was used instead. Communication between the server and the slaves is done over a RS-485 serial network which simulates the traffic over a radio-network. The results show that our protocol is working, and that our system would be easy to implement, cheap to produce and very scalable.
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