JP2006106823A - Electronic equipment, operating system start method to be executed by the equipment and operating system initialization method to be executed by the equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment for realizing the high speed start of an operating system, a method for rapidly starting the operating system to be executed by the electronic equipment and the high speed initialization method of the operating system to be executed by the electronic equipment. <P>SOLUTION: When the status of a digital TV is shifted from a stand-by status to an on status, a boot loader stored in a ROM loads proper initial value data stored in a FlashMemory to an FeRAM (a step S109). In this case, the initial value data are overwritten on change value data stored in the FeRAM. Therefore, the program of an operating system stored in the FeFAM is put in an initialization status. The boot loader starts the program of the operating system in the initialization status (a step S110). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electronic device having an operating system, an operating system startup method executed by the electronic device, and an operating system initialization method executed by the electronic device.

  2. Description of the Related Art In recent years, there is an operating system as software that manages complex control executed in digital electronic devices such as digital TV. The operating system is loaded from a flash ROM into a RAM such as a DRAM by a boot loader at the start of use of the digital electronic device. This operating system starts after being loaded into the RAM.

There is a technique of checking whether or not a program including an OS stored in a RAM is normally started when the system is started, and if there is an abnormality in the program on the RAM, the program is reloaded from the flash memory. (See Patent Document 1).
Japanese Unexamined Patent Publication No. 2003-131880 (page 4, FIG. 3)

  However, in the technique disclosed in Patent Document 1, when the system data stored in the RAM is corrupted, it is necessary to reload all the system data from the flash memory to the RAM. Even data is loaded into the RAM. Therefore, when the system data stored in the RAM is corrupted, there is a possibility that high-speed startup of the system is hindered.

  Therefore, the present invention provides an electronic device that realizes high-speed startup of an operating system, a high-speed startup method of an operating system executed by the electronic device, and a high-speed initialization method of an operating system executed by the electronic device.

  In order to achieve the above object, in the electronic device having an operating system according to claim 1, after the power-on event of the electronic device, the loading means for loading the operating system into the storage unit, and the operating system loaded into the storage unit Means for turning off the electronic device in a state, and the loading means stores the initial value data in the operating system when the electronic device is turned on again after the electronic device is turned off. Means for loading the part.

  An electronic device having an operating system according to claim 2, wherein after the power-on event of the electronic device, a loading unit that loads the operating system into the storage unit, and a boot unit that boots the operating system loaded into the storage unit And a means for turning off the power of the electronic device after the operating system is booted by the boot means and the operating system is stored in the storage unit, and the loading means is after the power of the electronic device is turned off. When the power of the electronic device is turned on again, the boot unit includes means for overwriting the initial value data in the operating system on the storage unit, and the boot unit overwrites the initial value data in the operating system on the storage unit. After that, the operation stored in the storage unit Characterized in that it comprises a means for booting the system.

  Further, in the electronic device having an operating system according to claim 4, after the power-on event of the electronic device, a load means for loading the operating system into the storage unit, and a power source of the electronic device with the operating system loaded in the storage unit And means for loading the initial value data in the operating system into the storage unit after the electronic device is powered off.

  An operating system initialization method executed by an electronic device having an operating system according to claim 6, wherein after the power-on event of the electronic device, the operating system is loaded into the storage unit, and the storage unit is loaded. When the electronic device is turned off with the operating system loaded, and when the electronic device is turned on again after the electronic device is turned off, the initial value data in the operating system is loaded into the storage unit. And the step of performing.

  An operating system startup method executed by an electronic device having an operating system according to claim 7, the step of loading the operating system into a storage unit after a power-on event of the electronic device, and the storage unit Booting the loaded operating system; booting the operating system; turning off the electronic device with the operating system stored in the storage; and turning off the electronic device and turning the electronic device off again. When the device is turned on, the initial value data in the operating system is overwritten in the storage unit, and the initial value data in the operating system is overwritten in the storage unit and the operating unit stored in the storage unit Boot the system Characterized by comprising a step.

  9. An operating system initialization method executed by an electronic device having an operating system according to claim 8, wherein the operating system is loaded into a storage unit after a power-on event of the electronic device, and the operating system is stored in the storage unit. And turning off the power of the electronic device in a loaded state, and loading the initial value data in the operating system into the storage unit after turning off the power of the electronic device.

  An operating system startup method executed by an electronic device having an operating system according to claim 9, wherein the operating system is loaded into a storage unit after a power-on event of the electronic device, and the storage unit is loaded. Booting the installed operating system, after booting the operating system, turning off the electronic device with the operating system stored in the storage unit, and after turning off the electronic device, When overwriting the initial value data in the storage unit in the storage unit and overwriting the initial value data in the operating system in the storage unit and then turning on the power of the electronic device again from the OFF state, the storage unit stores the initial value data. Said operating system Characterized by comprising the steps of booting, the.

  The electronic device having an operating system according to claim 10, further comprising: loading means for loading the operating system into the nonvolatile storage unit after the power-on event of the electronic device; and means for turning off the power of the electronic device. The loading means includes means for loading initial value data in the operating system into a nonvolatile storage unit when the electronic device is turned on again after the electronic device is turned off. To do.

  An electronic device having an operating system according to claim 11, comprising: loading means for loading the operating system into a nonvolatile storage unit after the power-on event of the electronic device; and an operating system loaded into the nonvolatile storage unit. A boot means for booting and a means for turning off the power of the electronic device, and the loading means is an initial part of the operating system when the electronic device is turned on again after the electronic device is turned off. An operating system stored in the nonvolatile storage unit after the load unit overwrites the initial value data in the operating system in the storage unit. Means for booting.

  An operating system initialization method executed by an electronic device having an operating system according to claim 12, wherein the operating system is loaded into a non-volatile storage unit after a power-on event of the electronic device; After loading the operating system into the storage unit, when turning off the power and turning on the electronic device again after turning off the electronic device, the initial value data in the operating system is stored in the nonvolatile memory. Loading to the unit.

  A method of starting an operating system executed by an electronic device having an operating system according to claim 13, wherein the operating system is loaded into a nonvolatile storage unit after a power-on event of the electronic device; Booting the operating system loaded in the storage unit, turning off the electronic device after booting the operating system, and turning on the electronic device again after turning off the electronic device The initial value data in the operating system is overwritten in the non-volatile storage unit, and the initial value data in the operating system is overwritten in the non-volatile storage unit and then stored in the non-volatile storage unit. To boot the operating system Characterized by comprising the flop, the.

  According to the present invention, there are provided an electronic device that realizes a fast startup of an operating system, a fast startup method of an operating system executed by the electronic device, and a fast initialization method of an operating system executed by the electronic device Is possible.

  Embodiments of the present invention will be described below with reference to the drawings. An electronic apparatus according to the present invention will be described by applying it to a digital TV.

  FIG. 1 shows a digital TV 1 and a remote controller 3 that controls the digital TV 1.

  The digital TV 1 has a main switch 2. The main switch 2 can be pushed down by the user. When the main switch 2 is pushed down, power is supplied to the device group constituting the digital TV 1, and the digital TV 1 is turned on as will be described later.

  The remote controller 3 is a device that controls the digital TV 1. The remote controller 3 has a switch 4. The switch 4 can be pushed down by the user.

  As will be described in detail later, when the user presses down the switch 4 while the digital TV 1 is in the power-on state, the digital TV 1 is in a state where the predetermined device in the device group constituting the digital TV 1 is powered on. It shifts to the standby state to supply. Next, the hardware configuration of the digital TV will be described with reference to FIG.

  FIG. 2 is a block diagram showing a hardware configuration of the digital TV 1.

A CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a Flash Memory 13, a FeRAM (Ferroelectric Random Access Memory) 14 and a Controller 15 are connected to the bus 10. The CPU 10 is a processor that controls the operation of the digital TV 1.

  The ROM 12 stores information that does not need to be rewritten, for example. The ROM 12 stores a boot loader, and the boot loader is executed when the digital TV 1 is activated.

  The FlashMemory 13 stores an operating system (OS), various application programs, various drivers, and the like. The operating system programs stored in the FlashMemory 13 are roughly divided into text and data. The text stored in the FlashMemory 13 is an instruction code, and the data is initial value data.

  By executing the boot loader stored in the ROM 12, appropriate text and initial value data among the text and data stored in the FlashMemory 13 are loaded into the FeRAM 14. That is, the boot loader loads the initialized operating system program into the FeRAM 14.

  The FeRAM 14 stores text and data loaded from the FlashMemory 13. The FeRAM 14 is a memory capable of nonvolatile storage. After starting the operating system, the CPU 10 executes the instruction code using the initial value data, so that the change value data is changed. The change value data is stored in the FERAM 14.

  The controller 15 is connected to a main switch 2, a PSC (Power Supply Controller) 16, and an infrared light receiving unit 17.

  When the user pushes down the main switch 2, the controller 15 detects that the main switch 2 is pushed down.

  When the digital TV 1 is in the off state, the controller 15 that has detected that the main switch 2 has been pushed down instructs the PSC 16 to supply power to the device group constituting the digital TV 1. On the other hand, when the state of the digital TV 1 is on, the controller 15 that has detected that the main switch 2 has been pushed down instructs the PSC 16 to stop supplying power to the device group constituting the digital TV 1.

  The PSC 16 controls power supply to a device group constituting the digital TV 1. The PSC 16 performs control to start or stop the power supply from the power supply unit 18 to the device group constituting the digital TV 1 based on the instruction to start or stop the power supply sent from the controller 15.

  The infrared light receiving unit 17 receives an infrared signal transmitted when the switch 4 provided on the remote controller 4 is pressed down. The controller 15 detects that the infrared light receiving unit 17 has received an infrared signal. As will be described in detail later, when detecting that an infrared signal has been received, the controller 15 instructs the PSC 16 to perform power supply control. Next, the state of the digital TV 1 will be described with reference to FIG.

  FIG. 3 is a state transition diagram explaining the state of the digital TV 1.

  An off state sta0 that is one of the states of the digital TV 1 refers to a state in which the digital TV 1 is not operating. In the off state sta0, power is not supplied from the power supply unit 18 to the device group configuring the digital TV 1.

  When the user performs a pressing operation of the main switch 2 in the off state sta0, the state of the digital TV 1 shifts to the on sta1.

  The on state sta1 refers to a state where the functions of the digital TV 1 can be sufficiently used. In the on state sta1, as described above, power is supplied from the power supply unit 18 to the device group constituting the digital TV 1.

  When the user performs the pressing operation of the main switch 2 in the on state 18, the state of the digital TV 1 shifts to the off state sta0. Further, when the user performs a pressing operation of the switch 4 provided in the remote controller 3 in the on state sta1, the state of the digital TV 1 shifts to the standby state sta2.

  When the state of the digital TV 1 is the standby state sta2, power is supplied to at least the PSC 11.

  When the user performs a pressing operation of the switch 4 in the standby state sta2, the state of the digital TV 1 shifts to the on state sta1. The details of the control executed when shifting from the standby state sta2 to the on state sta1 will be described in detail later. On the other hand, when the user presses down the main switch 2 in the standby state sta2, the state of the digital TV 1 shifts to the off state sta0. Next, the control executed when the user depresses the switch 4 in the standby state sta2 will be described.

  FIG. 4 is a flowchart illustrating a control procedure performed when the digital TV 1 shifts from the standby state sta2 to the on state sta1. FIG. 5 is a diagram illustrating loading of initial value data from the FlashMemory 13 to the FeRAM 14 when the digital TV 1 shifts from the standby state to the on state. A control procedure performed when the digital TV 1 shifts from the standby state sta2 to the on state sta1 will be described below with reference to FIGS. 4 and 5.

  The user presses down the main switch 2 of the digital TV 1 (step S100). In accordance with the operation in step S100, power is supplied from the power supply unit 18 to the device group constituting the digital TV 1. Thereafter, the boot loader stored in the ROM 12 is executed, and the operating system (OS) program stored in the FlashMemory 13 is loaded into the FeRAM 14 (step S101). The state of the digital TV 1 at this time is shifted from the off state sta0 to the on state sta1.

  After the processing in step S101, the operating system loaded in the FeRAM 14 is started (booted) by the boot loader (step S102).

  After the process of step S102, when the user performs a pressing operation on the main switch 2 (Yes in step S103), the power supply to the device group of the digital TV 1 is stopped.

  When the user does not perform the pressing operation on the main switch 2 (No in Step S103) and performs the pressing operation on the switch 4 (Yes in Step S104), power is supplied to at least the PSC 11 in the device group of the digital TV 1 ( Step S105). At this time, the state of the digital TV 1 is shifted from the on state sta1 to the standby state sta2 (step S106).

  On the other hand, when the digital TV 1 is in the on state sta1 and the user does not perform the pressing operation of the switch 4, the digital TV 1 is kept in the on state 1 (No in step S104).

  When the digital TV 1 is in the standby state sta2 and the user performs a pressing operation on the main switch 2 (Yes in step S107), the power supply from the power supply unit 18 to the device group of the digital TV 1 is stopped.

  On the other hand, when the digital TV 1 is in the standby state sta2 and the user does not perform the pressing operation on the main switch 2 (No in step S107) and performs the pressing operation on the switch 4 (Yes in step S108), the digital power is supplied from the power supply unit 18. Power is supplied to the device group constituting the TV 1. At this time, the state of the digital TV 1 is shifted from the standby state sta2 to the on state sta1.

  When the state of the digital TV 1 shifts from the standby state sta2 to the on state sta1, processing described below is performed.

  As shown in FIG. 5, the boot loader stored in the ROM 12 loads the appropriate initial value data into the FeRAM 14 among the text and the initial value data constituting the operating system program stored in the FlashMemory 13 (step S109). ). At this time, the initial value data stored in the FlashMemory 13 is overwritten on the change value data stored in the FeRAM 14. By the processing in step S109, the operating system program stored in the FeRAM 14 is initialized.

  In step S109, after the initial value data stored in the FlashMemory 13 is overwritten on the changed value data stored in the FeRAM 14, the boot loader starts the operating system program in the initialized state (step S110).

  When the state of the digital TV 1 is shifted from the standby state sta2 to the on state sta1, the boot loader does not load the text and initial value data stored in the FlashMemory 13 into the FeRAM 14, but loads only the initial value data into the FeRAM 14. As compared with the case where the text and initial value data are loaded into the FeRAM 14, the operating system can be initialized at a higher speed, and thus the operating system can be started at a higher speed.

  In the above embodiment, the FeRAM 14 has been described. However, a volatile memory such as a DRAM (Dynamic Random Access Memory) may be used instead of the FeRAM. However, in the case of a volatile memory instead of a non-volatile memory, a precharge operation called refresh is required periodically in order to keep holding data stored in the memory in a standby state.

  In the above embodiment, when the state of the digital TV 1 is shifted from the standby state sta2 to the on state sta1, the boot loader loads only the initial value data stored in the FlashMemory 13 into the FeRAM 14, but the state of the digital TV 1 After the state is shifted from the on state sta1 to the standby state sta2, the user does not operate the switch 4, and the boot loader loads only the initial value data stored in the FlashMemory 13 into the FeRAM 14 so as to be stored in the FeRAM 14. The configuration may be such that the change value data is overwritten.

  Further, when the state of the digital TV 1 is shifted from the standby state sta2 to the on state sta1, the boot loader confirms whether there is an abnormality in the content of data stored in the FlashMemory 13, and based on the confirmation result, the boot loader The configuration may be such that only the initial value data stored in the FlashMemory 13 is loaded into the FeRAM 14 to overwrite the change value data stored in the FeRAM 14.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

The figure which showed the relationship between digital TV and the remote control which controls the said digital TV. The block diagram which showed an example of the hardware constitutions of digital TV. The state transition diagram explaining the state of digital TV. The flowchart explaining the control procedure performed when transfering from a standby state to an ON state. The figure which shows loading of the initial value data from FlashMemory at the time of transfer to an ON state from a standby state to FeRAM.

Explanation of symbols

1 ... Digital TV, 2 ... Main switch, 3 ... Remote control, 4 ... Switch,
10 ... system bus, 11 ... CPU, 12 ... ROM,
13 ... FlashMemory, 14 ... RAM, 15 ... Controller,
16 ... PSC, 17 ... infrared light receiving unit, 18 ... power supply unit,

Claims (13)

In an electronic device having an operating system,
A load means for loading the operating system into a storage unit after a power-on event of the electronic device;
Means for turning off the power of the electronic device with an operating system loaded in the storage unit,
The loading means includes means for loading initial value data in the operating system into the storage unit when the electronic device is turned on again after the electronic device is turned off. Electronic equipment. In an electronic device having an operating system,
A load means for loading the operating system into a storage unit after a power-on event of the electronic device;
Boot means for booting an operating system loaded in the storage unit;
And means for turning off the power of the electronic device in a state where the operating system is stored in the storage unit after booting the operating system by the boot unit,
The loading means includes means for overwriting the storage unit with initial value data in the operating system when the electronic device is turned on again after the electronic device is turned off.
The boot unit includes an electronic device that boots the operating system stored in the storage unit after the load unit overwrites the storage unit with initial value data in the operating system. . In the case where the electronic device is turned on again after the electronic device is turned off, the loading unit is configured to check the operating system state stored in the storage unit based on the result of confirming the operating system state. The electronic device according to claim 1, wherein the initial value data is overwritten in the storage unit. In an electronic device having an operating system,
A load means for loading the operating system into a storage unit after a power-on event of the electronic device;
Means for turning off the power of the electronic device with an operating system loaded in the storage unit,
The loading means includes an means for loading initial value data in the operating system into the storage unit after the electronic device is powered off. The load means turns off the power of the electronic device and then stores initial value data in the operating system in the storage unit based on a result of confirming a state of the operating system stored in the storage unit. 5. The electronic device according to claim 4, wherein the electronic device is overwritten. In an operating system initialization method executed by an electronic device having an operating system,
Loading the operating system into a storage after a power-on event of the electronic device;
Powering off the electronic device with the operating system loaded in the storage unit;
When turning on the electronic device again after turning off the electronic device, loading initial value data in the operating system into the storage unit;
An operating system initialization method comprising: In an operating system startup method executed by an electronic device having an operating system,
Loading the operating system into a storage after a power-on event of the electronic device;
Booting the operating system loaded into the storage unit;
After booting the operating system, turning off the electronic device in a state where the operating system is stored in the storage unit;
When turning on the electronic device again after turning off the electronic device, overwriting initial value data in the operating system in the storage unit; and
Booting the operating system stored in the storage unit after overwriting the storage unit with initial value data in the operating system;
An operating system booting method comprising: In an operating system initialization method executed by an electronic device having an operating system,
Loading the operating system into a storage after a power-on event of the electronic device;
Powering off the electronic device with the operating system loaded in the storage unit;
After turning off the electronic device, loading the initial value data in the operating system into the storage unit;
An operating system initialization method comprising: In an operating system startup method executed by an electronic device having an operating system,
Loading the operating system into a storage after a power-on event of the electronic device;
Booting the operating system loaded into the storage unit;
After booting the operating system, turning off the electronic device in a state where the operating system is stored in the storage unit;
Overwriting the initial value data in the operating system in the storage unit after the electronic device is turned off;
Booting the operating system stored in the storage unit when the electronic device is turned on again from off after overwriting the initial value data in the operating system on the storage unit;
An operating system booting method comprising: In an electronic device having an operating system,
A load means for loading the operating system into a nonvolatile storage unit after a power-on event of the electronic device;
Means for turning off the power of the electronic device,
The loading means includes means for loading initial value data in the operating system into the nonvolatile storage unit when the electronic apparatus is turned on again after the electronic apparatus is turned off. Electronic equipment characterized by In an electronic device having an operating system,
A load means for loading the operating system into a nonvolatile storage unit after a power-on event of the electronic device;
Boot means for booting an operating system loaded in the non-volatile storage unit;
Means for turning off the power of the electronic device,
The loading means includes means for overwriting the nonvolatile storage unit with initial value data in the operating system when the electronic device is turned on again after the electronic device is turned off.
The boot means includes means for booting an operating system stored in the nonvolatile storage unit after the loading unit overwrites the storage unit with initial value data in the operating system. Electronic equipment. In an operating system initialization method executed by an electronic device having an operating system,
Loading the operating system into a non-volatile storage after a power-on event of the electronic device;
Turning off the power after loading the operating system into the non-volatile storage unit;
When turning on the electronic device again after turning off the electronic device, loading the initial value data in the operating system into the nonvolatile storage unit;
An operating system initialization method comprising: In an operating system startup method executed by an electronic device having an operating system,
Loading the operating system into a non-volatile storage after a power-on event of the electronic device;
Booting the operating system loaded into the non-volatile storage;
Powering off the electronic device after booting the operating system;
When turning on the electronic device again after turning off the electronic device, overwriting initial value data in the operating system in the nonvolatile storage unit;
Booting the operating system stored in the non-volatile storage unit after overwriting the initial value data in the operating system on the non-volatile storage unit;
An operating system booting method comprising:

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