System for indentifying a peripheral device by sending an inquiry thereto after receiving an interrupt notification message if the interrupt and communication port meet predetermined conditions
US6694428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jun 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/385
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and system for latency-independent peripheral device identification. In one embodiment, a computer system receives an interrupt from a peripheral device coupled to a computer system communications port. In response, an interrupt notification message is posted alerting a notification handler running on the system. It is determined whether the interrupt is indicates peripheral class compliance. In one embodiment, communications port device sense pin voltage is determinative. If the interrupt indicates peripheral class compliance and the communications port is inactive, the port is opened, and inquiry sent to the peripheral device via the open port. The computer system then waits for response from the peripheral device. If response is received within a predetermined time, identification is posted based on the response, including peripheral device classification information, so that a software handler registered with the operating system can handle the identification message when received. Thus, this embodiment imposes no time-critical interrupt response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.