Infra-red wireless communication
An infrared signal generator with an interface for receiving an encoded infrared command; and protocol generation circuitry for generating a bitstream that comprises one or more data words that comprise data to be transmitted and one or more protocol words that describe symbols of an infrared protocol is presented. Optionally, the protocol generation circuitry comprises a first circuit for generating a data word and a second circuit for generating a protocol word. Optionally, the infrared signal generator comprises a carrier frequency generator which is selectively combined with the output of either the first circuit or the second circuit to provide a drive signal for an infrared transmitter.
1. An infrared signal generator comprising:
an interface for receiving an encoded infrared command from a controller;
a decoder for decoding the encoded infrared command; and
protocol generation circuitry for generating a bitstream based on the decoded infrared command; wherein the bitstream comprises one or more data words that comprise data to be transmitted and one or more protocol words that describe symbols of an infrared protocol;
and components for generating a drive signal using the protocol words and the data words.
2. The infrared signal generator of claim 1 , wherein the protocol generation circuitry comprises a first circuit for generating a data word and a second circuit for generating a protocol word.
3. The infrared signal generator of claim 2 , comprising a carrier frequency generator which is selectively combined with the output of either the first circuit or the second circuit to provide a drive signal for an infrared transmitter.
4. The infrared signal generator of claim 1 , wherein each protocol word comprises a field defining a logic state and a duration.
5. The infrared signal generator of claim 1 , wherein the symbols described by the protocol words comprise one or more of: a header symbol, a gap symbol, a tail symbol.
6. The infrared signal generator of claim 1 , wherein the data word comprises a length field that denotes the number of valid bits in a data payload.
7. The infrared signal generator of claim 1 , wherein the data words and protocol words comprise a field that defines a word type as being either a protocol word or a data word.
8. An infrared controller device comprising:
a user interface for receiving user commands;
a controller for transforming the user commands to encoded infrared command signals; and
an infrared signal generator for transforming the encoded infrared command signals into a drive signal for an infrared transmitter; and
an infrared transmitter coupled with said infrared signal generator;
wherein the infrared signal generator comprises an interface for receiving the encoded Infrared command; a decoder for decoding the encoded infrared command; a protocol generation circuitry for generating a bitstream based on the decoded infrared command; wherein the bitstream comprises one or more data words that comprise data to be transmitted and one or more protocol words that describe symbols of an infrared protocol; and components for generating the drive signal using the protocol words and the data words.
9. A method of generating an infrared signal, comprising the steps of:
receiving an encoded infrared command signal from a controller,
decoding, with a decoder, the encoded infrared command,
transforming the command signal into an infrared signal by generating a bitstream based on the decoded infrared command; wherein the bitstream comprises one or more data words that comprise data to be transmitted and one or more protocol words that describe symbols of a communications protocol; and
generating a drive signal using the protocol words and the data words.
10. The method of claim 9 , wherein the protocol generation circuitry comprises a first circuit for generating a data word and a second circuit for generating a protocol word.
11. The method of claim 10 , further comprising the step of: providing a carrier frequency generator which is selectively combined with the output of either the first circuit or the second circuit to provide a drive signal for an infrared transmitter.
12. The method of claim 9 , wherein each protocol word comprises a field defining a logic state and a duration.
13. The method of claim 9 , wherein the symbols described by the protocol words comprise one or more of: a header symbol, a gap symbol, a tail symbol.
14. The method of claim 9 , wherein the data word comprises a length field that denotes the number of valid bits in a data payload.
15. The method of claim 9 , wherein the data words and protocol words comprise a field that defines a word type as being either a protocol word or a data word.