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| Method of teaching transmitter codes to remote receivers |
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Typematic guard protocol for wireless keyboards
| Details |
Inventors: Rajamani, Krishnan; Johnson, Harley D.; Lo, Steven C.; Reid, John L.; Yellepeddy, Venkatakrishna U.;
Assignee: Intel Corporation (Santa Clara, CA)
Primary Examiner: Horabik; Michael
Assistant Examiner: Dang; Hung
Attorney, Agent or Firm: Trop, Pruner & Hu, P.C.
A wireless keyboard may be provided with a guard protocol which prevents unintended typematics. An alive signal may be periodically generated to advise a host processor-based system that the keyboard communication link is still effective. If the host processor-based system receives a key make signal but does not receive a break signal or an alive signal, the processor-based system may deduce that the link has gone inactive, and may generate its own break signal. This avoids unnecessary power consumption and unnecessary typematics. |
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DETAILED DESCRIPTION Referring to FIG.
1, a processor-based system 10 may include a wireless link with a wireless base station 12 which in turn may maintain a wireless link with a wireless keyboard 14.
The base station 12 may increase the range of the wireless keyboard with respect to the processor-based system 10.
However, in some embodiments in the present invention, the wireless base station 12 may be eliminated, and the wireless keyboard 14 may communicate directly with the processor-based system 10.
The processor-based system 10 may be a desktop computer, a portable computer, a handheld device, an appliance, or a set-top box, as examples.
The wireless keyboard 14 may be a wireless computer keyboard, a remote control unit (RCU) which communicates with a processor-based system, which in some embodiments may be a set-top box, or other wireless peripherals such as game pad.
The communication between the systems 10, 12, and 14 may be by conventional infrared or radio wave links as examples.
In such cases, the wireless base station 12 may act, effectively, as a repeater.
The wireless base station 12 may essentially receive signals from the wireless keyboard 14, and retransmit those signals to the processor-based system 10.
A processor-based system 10 may include a processor 30 coupled to an interface 32 such as a bridge or a chipset.
Interface 32 may, for example, couple a system memory 34 and a bus 36.
The bus 36 in turn may be coupled to another interface 38 which may also be a bridge or part of a chipset.
The interface 38 may in turn be coupled to a hard disk drive 40 or other storage medium such as a floppy drive, a compact disk drive, a digital video disk drive, a flash memory or the like.
Software 16 may be stored on the hard disk drive 40 in one embodiment to the present invention.
The second bus 42 may be coupled to an airwave interface 44 and a basic input/output system (BIOS) storage 46.
The interface 44 receives signals from the wireless base station 12 or the wireless keyboard 14 and converts those signals into a form compatible with the processor-based system 10
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