Method to monitor universal serial bus hub overcurrent

• US 6,067,628 A
• Filed: 04/09/1998
• Issued: 05/23/2000
• Est. Priority Date: 04/09/1998
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: McGowan, Steve, Krithivas, Ramamurthy, Upadhyayula, Sharma
• Primary Examiner(s): Ray, Gopal C.
• Application Number:
  US09/057,954
• Time in Patent Office: 775 Days
• Field of Search: 713/340, 713/300, 710/62, 710/63, 710/2, 710/8, 710/46, 710/101, 710/129, 710/126, 327/108, 345/168, 345/212, 364/189, 709/301, 714/1, 714/14, 370/257, 370/912
• US Class Current: 713/340
• CPC Class Codes: G01R 31/3004 Current or voltage test
• CPC Class Codes: G06F 11/221 to test buses, lines or interfaces, e.g. stuck-at or open line faults

Abstract

A method for recognizing an overcurrent event in a universal serial bus is described. The method comprises the step of monitoring communication between a first layer and a second layer of the software layers of the universal serial bus. The method further comprises the step of generating a data structure configured to store the communication between the first layer and the second layer. The method also comprises the step of parsing the data structure to locate a data transition indicating the overcurrent event.

Claims

1. A method for recognizing an overcurrent event in a universal serial bus, the method comprising the steps of:

(A) monitoring communication between a first layer and a second layer of software layers of the universal bus;

(B) generating a data structure configured to store the communication between the first layer and the second layer; and

(C) parsing the data structure, the parsing locating a data transition in the data structure indicating the overcurrent event.

2. The method of claim 1, wherein Step (A) further includes inserting a filter driver between the first layer and the second layer.

3. The method of claim 2, wherein the first layer comprises a hub driver.

4. The method of claim 2, wherein the second layer comprises a universal serial bus driver.

5. The method of claim 1, wherein Step (B) further includes storing hub status information communicated between the first layer and the second layer.

6. The method of claim 5, wherein Step (B) further includes storing port status information communicated between the first layer and the second layer.

7. The method of claim 1, wherein Step (C) further includes a user interface configured to examine the data structure to locate the data transition, the user interface notifying a user when the data transition is detected.

8. The method of claim 7, wherein the data transition comprises a set overcurrent bit.

9. The method of claim 7, wherein the notification comprises indicating a hub affected by the overcurrent event.

10. The method of claim 7, wherein the notification comprises indicating a port affected by the overcurrent event.

11. A computer readable medium containing executable instructions which, when executed in a processing system, cause the system to perform the steps of recognizing an overcurrent event in a universal serial bus, the steps comprising:

(A) monitoring communication between a first layer and a second layer of software layers of the universal bus;

(B) generating a data structure configured to store the communication between the first layer and the second layer; and

(C) parsing the data structure, the parsing locating a data transition in the data structure indicating the overcurrent event.

12. The computer readable medium of claim 11, wherein Step (A) further includes inserting a filter driver between the first layer and the second layer.

13. The computer readable medium of claim 12, wherein the first layer comprises a hub driver.

14. The computer readable medium of claim 12, wherein the second layer comprises a universal serial bus driver.

15. The computer readable medium of claim 11, wherein Step (B) further includes storing hub status information communicated between the first layer and the second layer.

16. The computer readable medium of claim 15, wherein Step (B) further includes storing port status information communicated between the first layer and the second layer.

17. The computer readable medium of claim 11, wherein Step (C) further includes a user interface configured to examine the data structure to locate the data transition, the user interface notifying a user when the data transition is detected.