System and method for reconfiguring a real time clock time of a computer

• US 7,496,741 B2
• Filed: 09/06/2006
• Issued: 02/24/2009
• Est. Priority Date: 11/15/2005
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lee, Ming-Lung
• Primary Examiner(s): SURYAWANSHI, SURESH
• Application Number:
  US11/309,653
• Publication Number:
  US 20070113068A1
• Time in Patent Office: 902 Days
• Field of Search: 713/1
• US Class Current: 713/1
• 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 a first RTC time of the computer after a first time span of the first elapsed time;

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

an adjusting module for adjusting a second RTC time of the computer after a second time span of the second elapsed time to the sum of the initial RTC time and the second elapsed time, upon the condition that the first RTC time has errors and a time recovery request is received.

2. 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.

3. 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.

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

5. 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 a first RTC time of the computer after a first time span of the first elapsed time;

detecting whether the first RTC time is equal to the sum of the initial RTC time and the first elapsed time for determining whether the first RTC time has errors; and

adjusting a second RTC time of the computer after a second time span of the second elapsed time to the sum of the initial RTC time and the second elapsed time, upon the condition that the first RTC time has errors and a time recovery request is received.

6. The method according to claim 5, 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.