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Serial I/O device identifies itself to a computer through a serial interface during power on reset then it is being configured by the computer
| Details |
Inventors: Devon, Mark; Lynch, John; Nichols, James B.;
Assignee: Apple Computer, Inc. (Cupertino, CA)
Primary Examiner: Lee; Thomas C.
Assistant Examiner: Luu; Le Hien
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis, L.L.P.
A self-configuring startup procedure for communications devices, including telecommunications adapters, provides unambiguous identification of the telecommunications adapter, or other communications device, connected to a serial port. The procedure does not interfere with the operation of other existing I/O devices that might be connected to the serial port, such as network, MIDI, or other serial I/O devices. The I/O device is connected to a computer through a serial interface and a serial link. When the I/O device exits a reset state, the I/O device sends across the serial link to the computer a "beacon" signal identifying the I/O device. In particular, during the beacon phase, the I/O device communicates identification and configuration parameters. Preferably, the beacon phase may be instigated by the computer using the same serial-link communications channel. |
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DETAILED DESCRIPTION The present invention, generally speaking, provides a self-configuring startup procedure for communications devices, including telecommunications adapters.
The procedure provides unambiguous identification of the telecommunications adapter, or other communications device, connected to a serial port, and does not interfere with the operation of other existing I/O devices that might be connected to the serial port, such as network, MIDI, or other serial I/O devices.
In accordance with one embodiment of the invention, an I/O device is connected to a computer through a serial interface and a serial link.
When the I/O device exits a reset state, the I/O device sends across the serial link to the computer a "beacon" signal identifying the I/O device.
In particular, during the beacon phase, the I/O device communicates identification and configuration parameters.
Preferably, the beacon phase may be instigated by the computer using the same serial-link communications channel.
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I/O Systems 
