SYSTEM AND METHOD FOR RECONFIGURING A REAL TIME CLOCK TIME OF A COMPUTER

• US 20070113068A1
• Filed: 09/06/2006
• Published: 05/17/2007
• Est. Priority Date: 11/15/2005
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lee, Ming-Lung
• Granted Patent: US 7,496,741 B2
• Time in Patent Office: Days
• US Class Current: 713/100
• CPC Class Codes: G06F 1/14 Time supervision arrangements, e.g. real time clock

Abstract

A method for reconfiguring an RTC time of a computer is disclosed. The method includes the steps of: storing an initial real time clock (RTC) time when the computer is powered on; calculating a first elapsed time tracked from the initial RTC time and a second elapsed time tracked from the initial RTC time; reading an RTC time of the computer after a time span of the first elapsed time; detecting whether the RTC time equals the sum of the initial RTC time and the first elapsed time; and adjusting a current RTC time of the computer after a time span of the second elapsed time to the sum of the initial RTC time and the second elapsed time, if the RTC time doesn'"'"'t equal to the sum of the initial RTC time and the first elapsed time. A related system is also disclosed.

Claims

1. A system for reconfiguring a real time clock time of a computer, the system being stored in a basic input/output system (BIOS) that is connected with a complementary metal-oxide-semiconductor transistor random access memory (CMOS RAM), the system comprising:

a storing module for storing an initial real time clock (RTC) time from the CMOS RAM into the BIOS when the computer is powered on;

a calculating module for calculating a first elapsed time tracked from the initial RTC time and a second elapsed time tracked from the initial RTC time;

a reading module for reading an RTC time of the computer after a time span of the first elapsed time;

a detecting module for detecting whether the RTC time equals the sum of the initial RTC time and the first elapsed time; and

an adjusting module for adjusting a current RTC time of the computer after a time span of the second elapsed time to the sum of the initial RTC time and the second elapsed time.

2. The system according to claim 1, wherein the first elapsed time is used for testing whether the RTC time of the computer has errors.

3. The system according to claim 2, wherein the second elapsed time is used for adjusting the RTC time of the computer when the RTC time has errors.

4. The system according to claim 1, wherein the first elapsed time is calculated according to clock cycles recorded by a time stamp in a central processing unit (CPU) of the computer.

5. The system according to claim 1, wherein the second elapsed time is calculated according to clock cycles recorded by a time stamp in a central processing unit (CPU) of the computer.

6. The system according to claim 1, wherein the detecting module is further used for detecting whether there are time recovering requests from users.

7. A method for reconfiguring a real time clock time of a computer, the method comprising the steps of:

storing an initial real time clock (RTC) time from a complementary metal-oxide-semiconductor transistor random access memory (CMOS RAM) into a basic input/output system (BIOS) when the computer is powered on;

calculating a first elapsed time tracked from the initial RTC time and a second elapsed time tracked from the initial RTC time;

reading an RTC time of the computer after a time span of the first elapsed time;

detecting whether the RTC time is equal to the sum of the initial RTC time and the first elapsed time; and

adjusting a current RTC time of the computer after a time span of the second elapsed time to the sum of the initial RTC time and the second elapsed time, if the RTC time is not equal to the sum of the initial RTC time and the first elapsed time.

8. The method according to claim 7, wherein the initial RTC time is an accurate time that is used as a benchmark for reconfiguring the RTC time of the computer when the RTC has errors.