Handheld computer system and method to detect and identify a peripheral device
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United States of America Patent
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Feb 18, 2003
Issued Date -
N/A
app pub date -
Feb 9, 2000
filing date -
Aug 23, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a system and method that facilitates extendible identification of various peripheral devices coupled to a hand held computer. In one embodiment of a present invention peripheral device identification system and method, an initial pulse of an interrupt signal received by the hand held computer initiates an interrupt routine that continues to monitor the interrupt signal for additional pulses within a predetermined time. A hand held computer peripheral device identification system and method of the present invention correlates the number of received pulses with the type of peripheral device coupled to the serial port. In one exemplary implementation of the present invention, a hand held computer peripheral device identification detection system and method utilizes a hash table to map the number of pulses to a type of peripheral device. In one embodiment of the present invention, the hand held computer peripheral device identification system and method is backward compatible and capable of identifying legacy peripheral devices such as a cradle or modem.
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