Recovering a hardware module from a malfunction

• US 7,644,309 B2
• Filed: 05/20/2005
• Issued: 01/05/2010
• Est. Priority Date: 05/20/2005
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Saarinen, Kaj, Nurmi, Juha
• Primary Examiner(s): Iqbal; Nadeem
• Assistant Examiner(s): KO, CHAE M
• Application Number:
  US11/134,836
• Publication Number:
  US 20060282711A1
• Time in Patent Office: 1,691 Days
• Field of Search: 714/24, 714/51.57, 714/47, 714/48, 714/55, 714/23, 345/169, 710/19
• US Class Current: 714/23
• CPC Class Codes: H04W 52/027 by controlling a display operation or backlight unit
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The invention relates to a recovery of a hardware module of an electronic device from a malfunction state. The hardware module is connected via a signal line to a recovery component of the device, a state of the signal line being controlled by the hardware module. The recovery component monitors a state of the signal line. Whenever the signal line is detected not to assume a predetermined state during a predetermined period of time, the recovery component causes a hardware reset of the hardware module.

Claims

1. A method comprising:

monitoring a state of a signal line at a recovery component of an electronic device, wherein a first hardware module of said electronic device is directly connected with said recovery component via said signal line and the state of said signal line is controlled by said first hardware module; and

actively causing a hardware reset of said first hardware module by said recovery component, whenever said signal line is detected not to assume a predetermined state during a predetermined period of time,

wherein said first hardware module is directly connected to a second hardware module via said signal line so as to inform said second hardware module whenever said signal line is detected to assume said predetermined state.

2. A recovery component for an electronic device,

configured to be directly connected to a hardware module of said electronic device via a signal line;

and

configured to monitor a state of said signal line, based upon said hardware module, and to actively cause a hardware reset of said hardware module whenever said signal line is detected not to assume a predetermined state during a predetermined period of time,

wherein said hardware module is directly connected to a second hardware module via said signal line so as to inform said second hardware module whenever said signal line is detected to assume a predetermined state.

3. An apparatus comprising

a first hardware module

a second hardware module, and

a recovery component directly connected to said first hardware module via a signal line,

wherein said first hardware module is configured to set said signal line at regular intervals from a first predetermined state to a second predetermined state as long as no malfunction occurs in said hardware module;

said recovery component is configured to monitor a state of said signal line and to actively cause a hardware reset of said first hardware module whenever said signal line is detected not to assume said second predetermined state during a predetermined period of and

said first hardware module is directly connected to said second hardware module via said signal line so as to inform said second hardware module whenever said signal line is detected to assume said second predetermined state.

4. The apparatus according to claim 3, wherein said first hardware module is a display module comprising a display driver for a screen.

5. The apparatus according to claim 3, wherein said second hardware module is a frame control portion, which frame control portion is configured to detect said second predetermined state of said signal line as a synchronization signal for providing data to said first hardware module.

6. The apparatus according to claim 3, wherein said first hardware module is configured to stop setting said signal line at regular intervals from said first predetermined state to said second predetermined state in case at least one of the following occurs:

a bit in a control register of said first hardware module changes without cause within said first hardware module data in an internal bus of said first hardware module is corrupted, and a powering circuit of said first hardware module has stopped.

7. The apparatus according to claim 3, wherein said apparatus comprises a host, and wherein said recovery component is a part of said host.

8. A software program product stored with program code, which when executed by a recovery component, causes said recovery component to perform:

monitoring a state on a signal line, the state of said signal line being controlled by a first hardware module of an electronic device that is subject to a malfunction state, wherein said first hardware module is directly connected via the signal line to said recovery component of said electronic device; and

actively causing a hardware reset of said first hardware module whenever said signal line is detected not to assume a predetermined state during a predetermined period of time,

wherein said first hardware module is directly connected to a second hardware module via said signal line so as to inform said second hardware module whenever said signal line is detected to assume said predetermined state.

9. A recovery component for an electronic device comprising:

means for directly connecting said recovery component via a signal line to a first hardware module of said electronic device;

means for monitoring a state of said signal line, based upon said first hardware module, and

means for actively causing a hardware reset of said first hardware module whenever said signal line is detected not to assume a predetermined state during a predetermined period of time,

wherein said first hardware module is directly connected to a second hardware module via said means for connecting so as to inform said second hardware module whenever said signal line is detected to assume said predetermined state.