KR100493069B1 - Method and apparatus for recovering boot image in smart phone - Google Patents

Abstract

The present invention relates to a method for recovering a boot image in a smart phone. When booting of the PDA unit is not normally performed because the boot image is damaged in a flash memory in which a boot image of the PDA unit is recorded, emergency boot mode conversion information. Is transmitted to the phone control unit, and the emergency boot image of the PDA unit from the phone unit is transferred to the DPRAM shared with the PDA unit, the PDA control unit emergency booting the PDA unit with the emergency boot image of the PDA unit stored in the DPRAM And a step of connecting the phone unit to a server where a boot image is stored through a wireless module, downloading a normal boot image from the server, and rebooting the PDA unit with the downloaded normal boot image. How to recover a boot image on a smartphone It was current.

Description

METHOD AND APPARATUS FOR RECOVERING BOOT IMAGE IN SMART PHONE}

The present invention relates to a smartphone in which the PDA controller and the phone controller are booted independently of each other. When the boot image stored in the flash memory of the PDA of the smartphone is damaged, the boot image is booted from the smartphone which rewrites and boots the normal boot image. The present invention relates to a method and an apparatus for recovering.

A smart phone is a combination of the advantages of a mobile phone and a personal digital assistant (PDA). The smart phone integrates data communication functions such as scheduling, fax transmission and Internet access.

Referring to FIG. 1, the schematic structure of the smart phone is generally characterized by a PDA processor 120 for a PDA function and a phone controller for a phone function. The dual-processor structure of the phone processor 150 is performed, and each of them operates through an independent boot process. The data exchange between the two processors is performed through a device called dual-port RAM (DPRAM) 140 that shares the data buses of the two processors.

In addition, it is composed of a power supply unit 100 for supplying power and the input / output unit 110 in charge of the input / output function as provided in a general PDA device or a mobile phone.

The data exchange between the PDA devices is made by the PDA bus 160, and the data exchange between phone devices is made by the phone bus 170.

The code that starts when each control unit is reset is called a boot code, and the boot code image for booting from the PDA unit is recorded in the flash memory 130, and the power of the power source unit 100 is first turned on. If so, the booting operation of the PDA proceeds by reading the boot information recorded in the flash memory 130.

When constructing a memory map of a conventional PDA processor, a flash memory 130 is always connected to a CS0 (Chip Select 0) of a PDA controller 120 to which a memory device having a boot code is to be connected, and a CS1 (Chip). Select ROM 1 is connected to the DPROM 140.

Therefore, when the boot image area stored in the flash memory 130 of the PDA is damaged and a normal booting procedure is not performed, a separate external connection device (eg, JTAG or serial port) provided in the smart phone (not shown) Connect to a PC, ROM writer, etc., and receives the boot image from the device to recover.

However, the above conventional method should be further provided with a connector and a cable for connecting to the external connection device of the PDA processor. Since the external connection device requires a separate component space inside the smartphone, the smartphone becomes bulky and the transmission speed is also slow. In addition, a separate operation such as a connection operation and an image transfer operation with a general-purpose PC capable of transferring images in the flash memory is required. In addition, there is a disadvantage in that some skilled technicians incur a lot of labor costs, such as to be dispatched to update the flash memory.

Accordingly, an object of the present invention is to download and rewrite the boot image through the wireless module of the phone controller to rewrite the external device when the boot image does not proceed due to damage of the boot image stored in the memory of the PDA unit. The present invention provides a method and apparatus for recovering a boot image in a smartphone capable of restoring the boot image without being connected to the network.

According to the present invention for achieving the above object, in a smart phone in which the PDA control unit and the phone control unit are independently booted, the boot image of the PDA unit is normally booted because the boot image is damaged in the flash memory in which the boot image of the PDA unit is recorded. If not, the emergency boot mode conversion information is transmitted to the phone control unit, and the emergency boot image of the PDA unit is transferred from the phone unit to a DPRAM provided in a predetermined region of the smartphone, and the PDA control unit transmits the DPRAM to the DPRAM. Emergency booting the PDA unit with the emergency boot image stored in the PDA unit, connecting the phone unit to a server where the boot image is stored through a wireless module, and downloading a normal boot image from the server; Rebooting the PDA unit with a normal boot image Gong.

Rebooting the PDA unit with the downloaded normal boot image may include downloading a normal boot image from the server, writing the downloaded normal boot image to the DPRAM, and writing the DP controller to the DPRAM. And storing the normal boot image in the flash memory of the PDA unit and rebooting the PDA unit with the normal boot image stored in the flash memory of the PDA unit.

The emergency boot image is characterized in that it comprises a minimum code for performing a function to allow the PDA unit to download the normal boot image.

In addition, the present invention for achieving the above object, in the smart phone in which the PDA control unit and the phone control unit is booted independently, the booting of the PDA unit proceeds normally because the boot image is damaged in the memory in which the boot image of the PDA unit is recorded; If not, the first process of transmitting the emergency boot mode conversion information to the phone control unit, the second process of emergency booting the PDA unit with the emergency boot image stored in the flash memory of the phone control unit receiving the emergency boot mode conversion information; And a third process of accessing a server where a boot image is stored through a wireless module of the phone control unit, downloading a normal boot image from the server, and transmitting the normal boot image to the PDA unit, and rebooting the PDA unit with the downloaded normal boot image. Equipped with an emergency boot circuit for performing a fourth process to .

The third process of transmitting the normal boot image to the PDA unit may include: transmitting the normal boot image to the DPRAM, writing a normal boot image stored in the DPRAM to the flash memory of the PDA unit, and writing to the flash memory. And rebooting the PDA unit with the recorded normal boot image.

The DPRAM communicates with the PDA control unit via a PDA data bus, and communicates with the phone control unit via a phone data bus to share the PDA unit and the phone unit.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description of the reference numerals to the components of the drawings it should be noted that the same reference numerals as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or a chip designer, and the definitions should be made based on the contents throughout the present specification.

2 is a block diagram showing the structure of a smart phone using an emergency boot circuit according to the present invention.

As shown in FIG. 2, the emergency boot circuit 200 is further configured in a conventional smart phone, so that even if the flash memory 130 of the PDA unit is damaged, there is no problem in the function of the phone unit. The flash memory 130 of the PDA unit may be restored only by applying the operation.

That is, referring to FIG. 2, the emergency boot circuit 200 selects a memory device connected to CS0 of the PDA controller 120 so that a flash memory (or flash memory) may be used when a normal booting procedure is performed. 130), and in case of an emergency, it is possible to boot using the DPRAM 140.

Table 1 below shows signal processing according to the state of the emergency boot circuit 200.

Output CS_FL CS_DP GPEM ROUT Steady state CS0 CS1 Low High Emergency CS1 CS0 High GPRD

Referring to Table 1, in the normal boot state, CS0 of the PDA controller is connected to CS_FL, which is a connection terminal of the flash memory 130, and reads a boot image from the flash memory 130 to perform a normal booting procedure.

However, when the boot image stored in the flash memory 130 is damaged and normal booting does not proceed, the GPEM value connected to the phone controller 150 of the emergency boot circuit 200 is changed to high, The phone controller 150 recognizes an emergency boot state and receives a boot image through a flash memory and a wireless module (not shown) of the phone unit which maintain a normal state.

The boot image transmitted from the phone unit is first stored in the DPRAM 140. In the emergency state, as shown in Table 1, since CS0 of the PDA controller is connected to CS_DP, which is a connection terminal of the DPRAM 140, the PDA controller Reads the boot image recorded in DPRAM and performs the boot procedure.

When the transmission procedure is completed in the above process, the phone controller 150 switches the GPRD high for a predetermined time so that the emergency boot circuit 200 resets the PDA. The output of the GPRD is connected to a reset of the PDA (assuming active high) by an AND gate element from a power signal from the power supply unit 100.

Meanwhile, the capacity of the DPRAM 140 is significantly smaller than that of the SDRAM or the flash memory 130. Accordingly, the PDA emergency boot image downloaded to the DPRAM 140 preferably receives only the normal boot image from the phone unit and stores only the flash boot image in the flash memory 130.

Hereinafter, a procedure of booting the PDA unit through the emergency boot circuit 200 will be described in detail with reference to FIGS. 3 and 4.

3 is a flowchart illustrating a procedure of booting a PDA unit with an emergency boot image of a phone unit according to an exemplary embodiment of the present invention.

If the boot image of the PDA processor is damaged, the user presses a combination of predetermined key buttons of the terminal and then turns on the smartphone to proceed to the emergency boot mode.

First, the memory management unit (MMU) of the PDA controller 120 is initialized (S300) to prepare for receiving an emergency boot image.

The phone controller 150 receives an emergency boot image transmission command from the emergency boot circuit 200 and reads an emergency boot image of the PDA unit from a flash memory (not shown) provided in a predetermined area of the phone unit according to the command. It is.

Since the emergency boot image is difficult to directly transmit to the PDA unit, the emergency boot image is transmitted to the DPRAM 140 which is shared with the data bus of the PDA unit and the data bus of the phone unit.

The PDA unit receives a normal boot image from the DPRAM 140 (S310), writes it to the flash memory 130 of the PDA unit (S320), and when the recording is completed, the normal reception of the phone controller 150 is completed. Report (S330).

By the emergency boot image as described above, the PDA unit performs a minimum basic booting procedure and proceeds to a standby mode of receiving a normal boot image to perform a normal booting procedure.

4 is a flowchart illustrating a normal boot image download procedure in a PDA controller according to an embodiment of the present invention.

First, the phone controller 150 checks a GPEM, which is a general purpose input / output (GPIO) indicating an emergency signal, at S400, and recognizes it as a normal state when the GPEM is low. A normal boot process is performed (S420).

If the normal boot is not performed due to the damage of the flash memory 130 of the PDA unit, the GPEM indicating the emergency state of the emergency boot circuit is set to high, and the GPEM check of the phone controller 150 is performed (S410). At the time, the GPEM recognizes the emergency boot mode through the GPEM, and enters the emergency boot mode in which the boot image of the PDA unit is downloaded to the DPRAM 140.

When the emergency boot mode starts, the phone controller 150 connects to a wireless network through a wireless module (not shown) and accesses a server for customer support in which the emergency boot image is stored (S430).

When the latest PDA normal boot image stored by accessing the server is downloaded (S440), the downloaded data is recorded in the DPRAM 140 (S450), and the PDA unit downloads the normal boot image stored in the DPRAM 140. Be prepared to receive it. Here, the normal boot image is information containing a code for performing a function when the PDA is normally booted, and after the minimal booting operation is performed by the emergency boot image described above, additionally necessary for performing a normal booting operation. Contains information.

The download is completed and the normal boot image stored in the DPRAM 140 checks whether a bootable code is obtained through a process of checking a header, a checksum, and the like (S460).

If there is no abnormality, the emergency boot circuit 200 resets the PDA unit (S470) by switching GPRD, which is a GPIO, to high for a predetermined time. That is, as described above with reference to FIG. 2, the output of the GPRD is AND gated with the power signal from the power supply unit 100 and is connected to a reset of the PDA control unit 120.

The phone controller 150 transmits the downloaded normal boot image to the PDA by using the remaining memory area of the DPRAM 140 (S480).

The normal boot image is configured to include the emergency boot image information transmitted in FIG. 3, so that the emergency boot image can be used only for minimal booting of the PDA unit, and the normal boot image is configured after the minimum booting of the PDA unit. In order to allow a single boot to proceed normally, data may be stored in the flash memory 130.

Alternatively, the normal boot image may be configured only with information added to the emergency boot image information for normal booting of the PDA unit. By the above configuration, if the emergency boot image is first stored in the flash memory 130, the normal boot image downloaded thereafter may be additionally stored in the remaining area of the flash memory.

The PDA controller 120 receives the normal boot image from the phone controller 150, records the normal boot image in the flash memory 130, and reports the completion of the recording to the phone controller 150.

In this case, the recording completion report may be reported to the phone controller 150 for each data unit transmitted from the DPRAM 140 to the flash memory 130, and finally, the PDA controller 120 indicates that all normal boot images are completed. May be determined and reported to the phone controller 150.

Alternatively, the phone control unit 150 may terminate the transmission procedure by notifying the PDA control unit 120 after completing the final data transmission during the normal boot image transmission.

On the other hand, after the phone control unit 150 releases the emergency mode from the emergency boot circuit 200, the GPRD is kept high for a predetermined time to reset the PDA unit (S490), and the phone control unit 150 itself. You can also enter the normal boot state by resetting it.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

According to the present invention as described above, when the boot information of the PDA unit in the smartphone is damaged and normal booting is not performed, the boot information is downloaded and booted through a wireless module provided in the phone unit. The inconvenience of receiving the boot information can be reduced, thereby reducing unnecessary component space.

In addition, by downloading directly through the wireless module, it is possible to reduce the inconvenience that a skilled technician must be dispatched to update the flash memory caused when received by the external connection device.

1 is a block diagram showing a dual processor structure of a smartphone according to the prior art.

Figure 2 is a block diagram showing the structure of a smart phone using an emergency boot circuit according to the present invention.

3 is a flowchart illustrating a procedure of booting a PDA unit with an emergency boot image of a phone unit according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating a boot image download procedure in a PDA controller according to an embodiment of the present invention.

Claims (8)

In the smartphone that the PDA control unit and the phone control unit is booted independently of each other, If the boot image is damaged in the flash memory in which the boot image of the PDA is recorded and the booting of the PDA does not proceed normally, emergency boot mode conversion information is transmitted to the phone unit. An emergency boot image of the PDA unit is transferred from the phone unit to a DPRAM provided in a predetermined region of the smartphone, and the PDA controller emergency booting the PDA unit with the emergency boot image of the PDA unit stored in the DPRAM; Connecting the phone unit to a server where a boot image is stored through a wireless module and downloading a normal boot image from the server; And rebooting the PDA unit with the downloaded normal boot image. The method of claim 1, Rebooting the PDA unit with the downloaded normal boot image, Downloading a normal boot image from the server; Writing the downloaded normal boot image to the DPRAM; Storing, by the PDA controller, a normal boot image recorded in the DPRAM in a flash memory of the PDA; And rebooting the PDA unit with a normal boot image stored in the flash memory of the PDA unit. The method of claim 1, The emergency boot image is a method for recovering a boot image in a smart phone, characterized in that it comprises a minimum code that performs a function to allow the PDA unit to download a normal boot image. The method according to claim 1 and 2, And the DPRAM communicates with the PDA control unit via a PDA data bus, and communicates with the phone control unit via a phone data bus to share the PDA unit and the phone unit. In the smartphone that the PDA control unit and the phone control unit is booted independently of each other, A flash memory storing a PDA boot image for booting the PDA controller; A wireless module for receiving an emergency PDA boot image to replace the PDA boot image under the control of the phone controller when the PDA boot image is damaged; DPRAM for storing the emergency boot image received through the wireless module, When the normal booting procedure is performed, the PDA controller may boot using the PDA boot image stored in the flash memory, and in case of an emergency, the smart phone device including an emergency boot circuit for rebooting using the emergency boot image stored in the DPRAM. . delete The method of claim 5, And the DPRAM is shared by the PDA control unit and the phone control unit. The method of claim 7, wherein A PDA data bus performing an interface between the DPRAM and the PDA control unit; And a phone data bus for performing an interface between the DPRAM and the phone controller.