JP2005085039A - Recording and reproducing device, firmware rewriting method for recording and reproducing device, and program and computer-readable recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly execute a rewriting program performing a process for rewriting firmware. <P>SOLUTION: A system controller decides whether receiving a rewriting instruction of the firmware from a host PC in S1, reads the rewriting program stored in a program memory to move it to a buffer memory in S2 when receiving the rewriting instruction, executes the rewriting program on the buffer memory in S3, receives a program of a new master from the host PC to store it into the buffer memory in S4, erases a program area of a master of the program memory to erase the program of the master stored in the program memory in S5, reads the program of the new master stored in the buffer memory to write it into the program memory in S6, and writes a writing completion flag into the program memory in S7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a recording / reproducing apparatus such as a disk apparatus for recording / reproducing information on / from a recording medium, a firmware rewriting method of the recording / reproducing apparatus, a program, and a computer-readable recording medium.

A disk device, which is an example of a recording / reproducing device, has a built-in CPU, and a program executed by the CPU is called firmware (firmware program).
Recent disk devices have a large firmware scale, and it is not uncommon for improved firmware to be released after the product is released. This may be a bug fix, performance improvement, or the addition of a new specification. Therefore, many disk devices provide means for updating (updating) firmware.

Normally, the firmware in a disk unit is stored in a non-volatile memory. Previously, it was possible to store a program in the non-volatile memory at a chip manufacturing stage, a one-time ROM in which a program can be written only once, or a program multiple times by UV erasure. Since the EP ROM that can write is used, the firmware in the disk device could not be rewritten easily.
However, due to the recent provision of electrically erasable non-volatile memory called flash ROM, the market has been rapidly used not only for storing program memory but also for storing data in music playback devices such as digital cameras and MP3s. Since it was expanded and helped with miniaturization of the semiconductor process, it became very cheap, so it was possible to rewrite the firmware by using the flash ROM.

Some flash ROMs can read other data while data is being written, while others cannot. In addition, there are various types such as those that must be erased collectively, those that are erased in several divided areas, and those that are overwritten in small units without being erased.
For example, if you use Flash ROM that cannot read other data while writing data, or Flash ROM that must erase the entire data in the program memory that stores the firmware, rewriting to perform firmware rewriting The program must be executed on a memory other than Flash ROM.
The rewrite program can also be stored in mass chrome, but the type of memory increases and the cost increases.

Normally, the CPU has a work memory for storing a stack and variables. The work memory is a volatile memory that loses its contents when the power is turned off. If program data is placed here, the program can be executed in the same way as the program memory. However, the capacity of the work memory is often small.
However, if the rewriting program on the memory other than the flash ROM is limited to only the portion where the flash ROM is erased or the word data is written, the program size can be reduced and the program can be executed even with a small work memory.

Therefore, there has conventionally been a firmware rewriting method in which a firmware rewriting program is copied from a program memory to a work memory area used as a memory area for stacks and variables during execution of the firmware (for example, Patent Document 1, Patent Document) 2).
Japanese Patent Application Laid-Open No. 07-077807 JP 2000-207131 A

However, the conventional firmware rewriting method described above has a problem in that it cannot be executed when the rewriting program cannot enter the work memory.
In recent years, a program rewrite is a firmware update by a user, which is performed while connected to a host computer.
When using a dedicated machine in the factory, the interface can be simplified, but the scale of the rewriting program is very large at present when the response processing to the operating system of the host computer must be incorporated.

That is, as the size of the rewrite program increases, the amount of memory used for the stack and variables increases, and there is no longer an area for executing the rewrite program on the work memory.
The present invention has been made in view of the above points, and it is an object of the present invention to reliably execute a rewrite program for performing a process of rewriting firmware.

In order to achieve the above object, the present invention provides the following recording / reproducing apparatus (1) to (4).
(1) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information reproduced from the recording medium or the recording medium A buffer memory for temporarily storing information; means for moving the rewrite program stored in the program memory to the buffer memory; and executing a rewrite program stored in the buffer memory to receive a new firmware program from outside The received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, and the new firmware program stored in the buffer memory is deleted. The recording and reproducing apparatus having a means for rewriting the write in firmware program stored in the program memory in the program memory.

(2) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium, and a buffer memory for temporarily storing information recorded on the recording medium or information reproduced from the recording medium Receiving a rewrite program for rewriting the firmware program from outside, storing the received rewrite program in the buffer memory, and executing the rewrite program stored in the buffer memory to receive a new firmware program from the outside The received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, and the new firmware program stored in the buffer memory is updated. It is written in the program memory recording and reproducing apparatus having a means for rewriting the firmware program stored in the program memory.

(3) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on the recording medium and a rewriting program for rewriting the firmware program, and information reproduced from the recording medium or the recording medium A buffer memory for temporarily storing information; a work memory for storing stacks and variables at the time of execution of various processes; means for moving a rewrite program stored in the program memory to the work memory; Execute the rewriting program stored in the memory to receive a new firmware program from the outside, store the received new firmware program in the buffer memory, erase the firmware program stored in the program memory, Serial recording reproducing apparatus of the new firmware program stored in the buffer memory comprises means for rewriting the firmware program stored in the program memory is written into the program memory.

(4) In the recording / reproducing apparatus according to any one of the above (1) to (3), means for determining whether or not the rewriting program is normal, and an external rewriting program when the means determines that the rewriting program is abnormal Recording / reproducing apparatus provided with a means for receiving and executing.

Also provided is a firmware rewriting method for the following recording / reproducing apparatuses (5) to (8).
(5) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information reproduced from the recording medium or reproduced from the recording medium A method for rewriting a firmware of a recording / reproducing apparatus having a buffer memory for temporarily storing information, the step of moving a rewriting program stored in the program memory to the buffer memory, and a rewriting stored in the buffer memory Execute the program to receive a new firmware program from the outside, store the received new firmware program in the buffer memory, erase the firmware program stored in the program memory, Recording reproducing apparatus firmware rewriting method of the new firmware program stored and a step for rewriting the firmware program stored in the program memory is written in the program memory in Ffamemori.

(6) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on the recording medium, and a buffer memory for temporarily storing information recorded on the recording medium or information reproduced from the recording medium A method for rewriting a firmware of a recording / reproducing apparatus comprising: a step of receiving a rewrite program for rewriting the firmware program from the outside and storing the received rewrite program in the buffer memory; and a rewrite stored in the buffer memory The program is executed to receive a new firmware program from the outside, the received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, and the buffer is stored. Firmware Rewriting of the recording and reproducing apparatus comprising the new firmware program stored in the memory and a step of rewriting the firmware program stored in the program memory is written into the program memory.

(7) A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on the recording medium and a rewriting program for rewriting the firmware program, and information reproduced from the recording medium or the recording medium A method for rewriting a firmware of a recording / reproducing apparatus having a buffer memory for temporarily storing information and a work memory for storing a stack and variables at the time of executing various processes, the rewriting program stored in the program memory Moving the program to the work memory, executing a rewrite program stored in the work memory, receiving a new firmware program from the outside, storing the received new firmware program in the buffer memory, and storing the program A firmware rewriting method for a recording / reproducing apparatus, comprising: erasing a firmware program stored in the memory, writing a new firmware program stored in the buffer memory into the program memory, and rewriting the firmware program stored in the program memory .

(8) In the firmware rewriting method of the recording / reproducing apparatus according to any one of (5) to (7), a step of determining whether or not the rewriting program is normal, and an external process when the step is determined to be abnormal A firmware rewriting method for a recording / reproducing apparatus, comprising a step of receiving and executing an alternative rewriting program.

Furthermore, the following programs (9) to (12) are also provided.
(9) A rewriting program for rewriting a firmware program for performing control processing for recording or reproducing information on the recording medium stored in the program memory is temporarily stored in the computer, or information recorded on the recording medium or information reproduced from the recording medium The procedure for moving to the buffer memory to be stored and the rewrite program stored in the buffer memory are executed to receive a new firmware program from the outside, and the received new firmware program is stored in the buffer memory and stored in the program memory. Erase the stored firmware program and rewrite the firmware program stored in the program memory by writing the new firmware program stored in the buffer memory into the program memory. Program for executing the order.

(10) A rewrite program for rewriting a firmware program for performing control processing for recording or reproducing information on the recording medium is received from a computer, and the received rewriting program is reproduced from the information recorded on the recording medium or the recording medium A procedure for storing information in a buffer memory for temporarily storing information, a rewriting program stored in the buffer memory is executed, a new firmware program is received from the outside, and the received new firmware program is stored in the buffer memory. Firmware stored in the program memory by erasing the firmware program stored in the program memory and writing a new firmware program stored in the buffer memory to the program memory Program for executing a procedure for rewriting the program.

(11) Move a rewrite program for rewriting a firmware program for performing control processing for recording or reproducing information to / from a recording medium stored in the program memory to a work memory for storing a stack and variables at the time of executing various processes. To execute a rewriting program stored in the work memory, receive a new firmware program from the outside, temporarily record the received new firmware program on the recording medium or information reproduced from the recording medium Stored in the buffer memory, erase the firmware program stored in the program memory, write a new firmware program stored in the buffer memory to the program memory, and store it in the program memory. Program for executing a procedure for rewriting the firmware program.

(12) In any one of the programs (9) to (11), a procedure for determining whether or not the rewriting program is normal and a replacement rewriting program received from the outside when it is determined that the procedure is abnormal A program to execute the procedure to be executed.
Furthermore, the following (13) computer-readable recording medium is also provided.
(13) A computer-readable recording medium recording the program according to any one of (5) to (11).

  The recording / reproducing apparatus, the firmware rewriting method of the recording / reproducing apparatus, the program, and the computer-readable recording medium according to the present invention can reliably execute the rewriting program for performing the process of rewriting the firmware.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a drive apparatus according to an embodiment of the present invention.
This drive apparatus is a recording / reproducing apparatus such as a DVD drive apparatus, and performs recording and reproduction of information with respect to the optical disk 19 by rotationally driving the optical disk 19 by the spindle motor 1. The spindle motor 1 is controlled by the motor driver 4 and the servo processing unit 8 so that the linear velocity or the angular velocity is constant. The linear velocity or angular velocity can be changed in stages.

The optical pickup 2 includes a semiconductor laser, an optical system, a focus actuator, a track actuator, a light receiving element, and a position sensor, which are not shown because they are known, and irradiates the optical disk 19 with laser light. The optical pickup 2 can be moved by a seek motor (not shown).
The focus actuator, the track actuator, and the seek motor are configured such that the laser driver spot and the servo processing unit 8 cause a laser beam spot on the optical disc 19 based on a signal obtained from the light receiving element and the position sensor (write position or write position). (Reading position).

When reproducing (reading: reading) information recorded on the optical disc 19, the reproduction signal obtained by the optical pickup 2 is amplified by the read amplifier 5 and binarized, and then input to the CD decoder 6 for deinterleaving. And receive error correction. Subsequently, this data is input to the CD-ROM decoder of the CD-ROM decoder / CD-ROM encoder / subcode controller 10 and is subjected to error correction processing to further improve the reliability of the data.
Thereafter, the data is temporarily stored in the buffer memory 15 by the buffer manager 14 and sent to the host (PC) 17 to the host through the host interface (I / F) 16 such as ATAPI or SCSI interface when the data is prepared as sector data. .

When recording (writing: writing) information on the optical disk 19, data sent from the host PC 17 through the host I / F 16 is temporarily stored in the buffer memory 15 by the buffer manager 14.
Writing starts when a certain amount of data is stored in the buffer memory 15, but before that, the laser beam spot must be positioned at the writing start point. The starting point is obtained from a wobble signal preliminarily engraved on the optical disk 19 by meandering of the track. The wobble signal includes absolute time information called ATIP, and the ATIP decoder 9 can extract the absolute time information.
Further, the synchronization signal generated by the ATIP decoder is input to the CD encoder so that data can be written at an accurate position.

Data in the buffer memory 15 is added with an error correction code and interleaved by a CD-ROM decoder, a CD-ROM encoder, a CD-ROM encoder of the sub-code controller 10 and a CD encoder 7, and an LD driver (laser control circuit) 3 , Recorded on the optical disk 19 via the optical pickup 2.
The series of control processes is performed by a system controller (CPU) 11 that is a microcomputer.
A work memory 12 and a program memory 13 are connected to the bus 18 of the system controller 11.

The program memory 13 is mainly for storing a system controller program, and rewrites the main program, which is a firmware program for performing control processing for recording or reproducing information on the recording medium, and the main program (firmware program) ( A rewrite program for updating the firmware is stored, and a write completion flag is also stored in the process according to the present invention described later.
The program memory 13 is a rewritable nonvolatile memory, for example, a flash ROM having a storage capacity of 512 Kbytes.

The work memory 12 stores various stacks (stack information) and variables when various programs are executed, and also stores a rewrite program by processing according to the present invention described later. The work memory 12 is a volatile memory, for example, a static ram having a storage capacity of 8 Kbytes.
The buffer memory 15 temporarily stores write data, which is information to be recorded on the optical disc 19, and read data, which is information reproduced from the optical disc 19, and a rewrite program and a main program (firmware) by processing according to the present invention described later. Program). The buffer memory 15 is a volatile memory, for example, a dynamic ram having a storage capacity of 2 Mbytes.

The system controller 11 can randomly access the buffer memory 15 via the buffer manager 14, and obtains the subcode information by the header information and the subcode controller of the CD-ROM decoder / CD-ROM encoder / subcode controller 10. And can be added.
The system controller 11 executes the firmware rewriting program according to the present invention to execute the firmware rewriting method for the recording / reproducing apparatus according to the present invention. That is, the system controller 11 functions as each unit of the recording / reproducing apparatus according to the present invention.
The firmware rewriting program according to the present invention may be directly stored in the program memory 13, or may be recorded on a computer-readable recording medium such as the optical disk described above, and the system is stored in the program memory 13 via the recording medium. The controller 11 may be installed and stored so as to be executable.

FIG. 2 is a diagram showing a memory map of the work memory 12, the program memory 13, and the buffer memory 15 shown in FIG.
The system controller 11 can access the buffer memory 15 by projecting it onto the first buffer window 20 or the second buffer window 21, and the window sizes are 64K bytes and 4K bytes, respectively.
Since the system controller 11 can arrange the first buffer window 20 and the second buffer window 21 anywhere in the buffer memory 15 by register setting, the entire buffer memory can be accessed at random.

Means for randomly accessing information in the buffer memory; means for executing a rewrite program to update the firmware of the program memory; and transferring the rewrite program from the program memory to the buffer memory and executing the program to update the firmware. A disk device characterized by performing update.

Next, the first firmware rewriting process in the disk device of this embodiment will be described.
FIG. 3 is an explanatory diagram of the first firmware rewriting process in the disk device shown in FIG.
First, the program memory 13 stores a rewrite program 22 and a main program 23.
Normally, the system controller 11 executes the main program 23 in the program memory 13 to read / write the optical disc 19.

  When the system controller 11 receives a rewrite command for updating the firmware from the host PC 17, the system controller 11 sets the first buffer window 20 at the head of the buffer memory 15, reads the rewrite program 22 in the program memory 13, and enters the buffer memory 15. Write and transfer. The rewriting program to be transferred is addressed in consideration of being transferred in advance, and may be the entire rewriting program or a part thereof. A method of transferring the program addressable on the program memory 13 while converting it is also conceivable.

When the system controller 11 moves the rewrite program 22 to the buffer memory 15, the system controller 11 executes the rewrite program 22. If the moved rewrite program is a part of the rewrite program, the system controller 11 executes the part of the rewrite program. The remaining rewriting program may be moved.
Next, the system controller 11 receives the new main program 24 from the host PC 17 and writes and stores the new main program 24 so as not to overlap the rewrite program 22 on the buffer memory 15.

Thereafter, the system controller 11 erases the area of the program memory 13 in which the main program 23 is stored (erase the main program 23), and reads a new main program 24 from the buffer memory 15 through the second buffer window 21. The new main program 24 stored in the buffer memory 15 is written in the program memory 13 to rewrite the firmware.
Although the size of the second buffer window 21 is 4K, all new main programs 24 in the buffer memory 15 can be read by shifting the window.
Then, the system controller 11 writes a write completion flag indicating that the new main program has been written into the predetermined area of the program memory 13 and the firmware has been rewritten.

FIG. 4 is a flowchart of the first firmware rewriting process by the system controller 11 of the disk device shown in FIG.
The system controller 11 determines whether or not a firmware rewrite command has been received from the host PC in step (indicated by “S” in the figure) 1. If not received, the process is terminated. The rewrite program stored in the memory is read, written to the buffer memory, and moved.
In step 3, the rewrite program is executed on the buffer memory. In step 4, a new main program is received from the host PC, and the new main program is written and stored in the buffer memory. In step 5, the main program area of the program memory is erased and the main program stored in the program memory is erased. In step 6, the new main program stored in the buffer memory is read and written in the program memory. Then, a write completion flag is written in the program memory and this process is terminated.

In the above processing, the buffer memory is sufficiently large relative to the program memory (flash memory), so the main program is received at one time. However, if the buffer memory is smaller than the program memory, the new main program reception and writing operations are repeated. It is also possible to do this.
In this way, if an inexpensive memory called DRAM is used for the buffer memory of the disk device, the capacity is considerably larger than that of the work memory. Therefore, by executing the rewrite program on the buffer memory, high-performance and large-scale rewrite is possible. The program can be executed reliably.
In addition, since the contents of the work memory are not destroyed, the control can be returned to the main program without resetting.

Next, if the program capacity approaches the capacity of the flash ROM when the drive device is shipped, the changed firmware may exceed the capacity of the flash ROM and the firmware may not be released.
Therefore, if the rewrite program is transferred from the host PC without having the program memory in advance, the capacity can be allocated to the main program.
Next, the second firmware rewriting process in the disk device of this embodiment will be described.
FIG. 5 is an explanatory diagram of the second firmware rewriting process in the disk device shown in FIG.
First, a main program 23 is stored in the program memory 13.
Normally, the system controller 11 executes the main program 23 in the program memory 13 to read / write the optical disc 19.

When the system controller 11 receives a rewrite command for updating the firmware from the host PC 17, the system controller 11 sets the first buffer window 20 at the head of the buffer memory 15, receives the rewrite program 22 from the host PC 17, and stores it in the buffer memory 15. Write and store.
After storing the rewrite program 22 in the buffer memory 15, the system controller 11 executes the rewrite program 22.
Next, the system controller 11 receives the new main program 24 from the host PC 17 and writes and stores the new main program 24 so as not to overlap the rewrite program 22 on the buffer memory 15.

Thereafter, the system controller 11 erases the area of the program memory 13 in which the main program 23 is stored (erase the main program 23), and reads a new main program 24 from the buffer memory 15 through the second buffer window 21. The new main program 24 stored in the buffer memory 15 is written in the program memory 13 to rewrite the firmware.
Although the size of the second buffer window 21 is 4K, all new main programs 24 in the buffer memory 15 can be read by shifting the window.
Then, the system controller 11 writes a write completion flag indicating that the new main program has been written into the predetermined area of the program memory 13 and the firmware has been rewritten.

FIG. 6 is a flowchart of the second firmware rewriting process by the system controller 11 of the disk device shown in FIG.
The system controller 11 determines whether or not a firmware rewrite command has been received from the host PC at step 11 (indicated by “S” in the figure). If not received, the process is terminated. The rewrite program is received from the PC, and is written and stored in the buffer memory.
In step 13, the rewrite program is executed on the buffer memory. In step 14, a new main program is received from the host PC, and the new main program is written and stored in the buffer memory. In step 15, the main program area of the program memory is erased and the main program stored in the program memory is erased. In step 16, the new main program stored in the buffer memory is read and written in the program memory. Then, a write completion flag is written in the program memory and this process is terminated.

In the above processing, the buffer memory is sufficiently large relative to the program memory (flash memory), so the main program is received at once. If the buffer memory is smaller than the program memory, the new main program reception and writing operations are repeated. It is also possible to do this.
In this way, a new high-function and large-scale rewrite program can be easily and reliably executed.

  Next, the work memory may be insufficient to execute the rewriting program, but in some cases, the work memory may have a sufficient capacity. In that case, if the rewrite program is moved to the work memory and made resident while the main program is being executed, nonvolatile information may be written to the flash memory even while the main program is being executed. Can be shared.

Next, the third firmware rewriting process in the disk device of this embodiment will be described.
FIG. 7 is an explanatory diagram of a third firmware rewriting process in the disk device shown in FIG.
First, the program memory 13 stores a rewrite program 22 and a main program 23. Further, the variable and stack 26 are stored in the work memory 12 by the processing of the system controller 11.

When the drive system of the disk device is reset, the system controller 11 executes a series of initial settings. When the initial settings are completed, the system controller 11 reads the rewrite program 22 stored in the program memory 13 and reads the main memory of the work memory 12. The program 23 is written and transferred to an area not used. The rewriting program 22 to be transferred is addressed in consideration of being transferred in advance, and may be the entire rewriting program or a part thereof. Thereafter, the system controller 11 executes the main program 23 in the program memory 13 to read / write the optical disc 19.
In this way, the rewriting program 22 can be made resident while the main program 23 is being executed.

When the system controller 11 receives a rewrite command for updating the firmware from the host PC 17, it executes the rewrite program 22 on the work memory 12, receives a new main program 24 from the host PC 17, and stores it in the buffer memory 15. A new main program 24 is written and stored.
Thereafter, the system controller 11 erases the area of the program memory 13 in which the main program 23 is stored (erase the main program 23), and reads a new main program 24 from the buffer memory 15 through the second buffer window 21. The new main program 24 stored in the buffer memory 15 is written in the program memory 13 to rewrite the firmware.
Although the size of the second buffer window 21 is 4K, all new main programs 24 in the buffer memory 15 can be read by shifting the window.
Then, the system controller 11 writes a write completion flag indicating that the new main program has been written into the predetermined area of the program memory 13 and the firmware has been rewritten.

FIG. 8 is a flowchart of processing at the time of system reset by the system controller 11 of the disk device shown in FIG.
When the system controller 11 resets the system in step (indicated by “S” in the figure) 21, it reads the rewrite program stored in the program memory in step 22, writes it in the work memory, moves it, and in step 23 stores it in the program memory. When the stored main program is executed, the processing at the time of system reset is terminated.

FIG. 9 is a flowchart of the third firmware rewriting process by the system controller 11 of the disk apparatus shown in FIG.
The system controller 11 determines whether or not a firmware rewrite command has been received from the host PC at step 31 (indicated by “S” in the figure). If not received, the process is terminated. The rewriting program is executed on the memory, and a new main program is received from the host PC in step 33, and the new main program is written and stored in the buffer memory. In step 34, the main program area of the program memory is erased to erase the main program stored in the program memory. In step 35, the new main program stored in the buffer memory is read out and written into the program memory. Then, a write completion flag is written in the program memory and this process is terminated.

In the above processing, the buffer memory is sufficiently large relative to the program memory (flash memory), so the main program is received at once. If the buffer memory is smaller than the program memory, the new main program reception and writing operations are repeated. It is also possible to do this.
In this way, the rewriting program can be easily and reliably executed by effectively utilizing the work memory.

Next, if the power goes down during the firmware update, the program will be lost, and there is a risk that it will not be able to start again.
Therefore, it is recommended that the rewrite program and the main program can be executed independently, and the firmware update can be performed by rewriting only the main program so that the main program can be written again even if the main program is lost due to an accident. .
Also, sometimes the rewriting program is updated. Even if an accident occurs at this time and the rewriting program is lost, it is recommended to restore it.

At the time of the second firmware rewriting process, it is determined whether or not the rewriting program received from the host PC 17 is normal. If the rewriting program is normal, the above-described process is executed. If abnormal, the normal rewriting program is received from the host PC 17 and executed. To do.
In the case of the first or third firmware rewriting process, the process shown in the flowchart of FIG. 10 is executed.

FIG. 10 is a flowchart of processing for rewriting the main program and the rewriting program by the system controller 11 of the disk device shown in FIG.
The system controller 11 determines in step (indicated by “S” in the figure) 41 whether or not a rewrite command for updating the firmware has been received from the host PC. If not received, the process is terminated. Then, in step 42, it is determined whether or not the rewriting program is normal. This determination can be confirmed by calculating a write completion flag or a checksum of the rewrite program.

If it is determined in step 42 that the rewrite program is not normal but abnormal, in step 52 the first buffer window is set at the head of the buffer memory, the rewrite program is received from the host PC, and the rewrite program is received from the buffer memory or work memory. In step 53, the rewriting program is executed.
On the other hand, if the rewrite program is normal as determined in step 42, the process of setting the first buffer window at the head of the buffer memory and moving the rewrite program to the buffer memory in step 43 (or the process of moving the rewrite program to the work memory) ) And the rewriting program is executed in step 44.

Next, in step 45, a new main program and a new rewrite program are received from the host PC, and the new main program and the new rewrite program are written and stored in the buffer memory so as not to overlap the rewrite program on the buffer memory.
In step 46, the main program area of the program memory is erased and the main program stored in the program memory is erased. In step 47, the new main program stored in the buffer memory is read out and written into the program memory. The program is rewritten, and a write completion flag is written in the program memory in step 48.

Further, in step 49, the rewrite program area of the program memory is erased to erase the rewrite program stored in the program memory. In step 50, the new rewrite program stored in the buffer memory is read and written to the program memory. In step 51, the write completion flag is written in the program memory.
A new main program 24 is read from the buffer memory 15 through the second buffer window 21. Although the size of the second buffer window 21 is 4K, all new main programs 24 in the buffer memory 15 can be read by shifting the window.

In the above processing, the buffer memory is sufficiently large relative to the program memory (flash memory), so the main program is received at once. If the buffer memory is smaller than the program memory, the new main program reception and writing operations are repeated. It is also possible to do this.
In this way, the safety of firmware update can be improved.

  The recording / reproducing device, the firmware rewriting method of the recording / reproducing device, the program, and the computer-readable recording medium according to the present invention are a CD-ROM disc device, a CD-R disc device, a CD-RW disc device, a DVD-ROM disc device, a DVD. The present invention can also be applied to optical disk drive devices such as -R disk devices, DVD + R disk devices, DVD-RW disk devices, DVD + RW disk devices, magneto-optical disk devices, and MD devices.

It is a block diagram which shows the structure of the drive device of one Embodiment of this invention. It is a figure which shows the memory map of the work memory 12, the program memory 13, and the buffer memory 15 which are shown in FIG. FIG. 3 is an explanatory diagram of a first firmware rewriting process in the disk device shown in FIG. 1. FIG. 3 is a flowchart of first firmware rewriting processing by a system controller 11 of the disk device shown in FIG. 1. It is explanatory drawing of the 2nd firmware rewriting process in the disk apparatus shown in FIG.

FIG. 6 is a flowchart of the second firmware rewriting process by the system controller 11 of the disk device shown in FIG. It is explanatory drawing of the 3rd firmware rewriting process in the disk apparatus shown in FIG. FIG. 3 is a flowchart of processing at the time of system reset by the system controller 11 of the disk device shown in FIG. 1. FIG. 10 is a flowchart of third firmware rewriting processing by the system controller 11 of the disk device shown in FIG. 1. It is a flowchart figure of the process which rewrites the rewriting program and the main program by the system controller 11 of the disk apparatus shown in FIG.

Explanation of symbols

1: Spindle motor 2: Optical pickup 3: LD driver 4: Motor driver 5: Read amplifier 6: CD decoder 7: CD encoder 8: Servo processing unit 9: ATIP decoder 10: CD-ROM decoder / CD-ROM encoder / sub Code controller 11: System controller 12: Work memory 13: Program memory 14: Buffer manager 15: Buffer memory 16: Host I / F 17: Host PC 18: Bus 19: Optical disk 20: First buffer window 21: Second buffer window 22: Rewrite program 23: Main program 24: New main program 25: Write completion flag 26: Variable, stack

Claims (13)

A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information recorded on the recording medium or information reproduced from the recording medium are temporarily stored Buffer memory to store automatically,
Means for moving the rewrite program stored in the program memory to the buffer memory;
The rewriting program stored in the buffer memory is executed to receive a new firmware program from outside, the received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, A recording / reproducing apparatus comprising: means for writing a new firmware program stored in a buffer memory into the program memory and rewriting the firmware program stored in the program memory. A rewritable program memory for storing a firmware program for performing control processing of recording or reproducing information on the recording medium, a buffer memory for temporarily storing information recorded on the recording medium or information reproduced from the recording medium,
Means for receiving a rewrite program for rewriting the firmware program from outside and storing the received rewrite program in the buffer memory;
The rewriting program stored in the buffer memory is executed to receive a new firmware program from outside, the received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, A recording / reproducing apparatus comprising: means for writing a new firmware program stored in a buffer memory into the program memory and rewriting the firmware program stored in the program memory. A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information recorded on the recording medium or information reproduced from the recording medium are temporarily stored Buffer memory for storing automatically, work memory for storing stacks and variables at the time of execution of various processes,
Means for moving the rewrite program stored in the program memory to the work memory;
The rewriting program stored in the work memory is executed to receive a new firmware program from outside, the received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, A recording / reproducing apparatus comprising: means for writing a new firmware program stored in a buffer memory into the program memory and rewriting the firmware program stored in the program memory.   4. The recording / reproducing apparatus according to claim 1, wherein means for determining whether or not the rewriting program is normal and receiving a rewriting program from the outside when the means determines that the rewriting program is abnormal. And a recording / reproducing apparatus characterized in that a means for executing is provided. A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information recorded on the recording medium or information reproduced from the recording medium are temporarily stored A method for rewriting firmware of a recording / reproducing apparatus including a buffer memory for storing the data,
Moving the rewrite program stored in the program memory to the buffer memory; executing the rewrite program stored in the buffer memory to receive a new firmware program from outside; and receiving the received new firmware program in the buffer Storing in the memory, erasing the firmware program stored in the program memory, writing a new firmware program stored in the buffer memory into the program memory, and rewriting the firmware program stored in the program memory. A method for rewriting firmware in a recording / reproducing apparatus. A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium, and a buffer memory for temporarily storing information recorded on the recording medium or information reproduced from the recording medium A method for rewriting the firmware of the recording / reproducing apparatus,
Receiving a rewrite program for rewriting the firmware program from outside, storing the received rewrite program in the buffer memory, and executing a rewrite program stored in the buffer memory to receive a new firmware program from the outside, The received new firmware program is stored in the buffer memory, the firmware program stored in the program memory is erased, and the new firmware program stored in the buffer memory is written into the program memory and stored in the program memory. A method for rewriting firmware of a recording / reproducing apparatus, comprising: rewriting a firmware program. A rewritable program memory for storing a firmware program for performing control processing for recording or reproducing information on a recording medium and a rewriting program for rewriting the firmware program, and information recorded on the recording medium or information reproduced from the recording medium are temporarily stored A method for rewriting a firmware of a recording / reproducing apparatus, comprising: a buffer memory for storing data and a work memory for storing a stack and variables at the time of executing various processes,
Moving the rewrite program stored in the program memory to the work memory; executing the rewrite program stored in the work memory to receive a new firmware program from outside; and receiving the received new firmware program in the buffer Storing in the memory, erasing the firmware program stored in the program memory, writing a new firmware program stored in the buffer memory into the program memory, and rewriting the firmware program stored in the program memory. A method for rewriting firmware in a recording / reproducing apparatus.   The firmware rewriting method for a recording / reproducing apparatus according to any one of claims 5 to 7, wherein a step of determining whether or not the rewriting program is normal, and a replacement from the outside when the step is determined to be abnormal by the step A firmware rewriting method for a recording / reproducing apparatus, comprising: a step of receiving and executing a rewriting program.   A buffer for temporarily storing information recorded on the recording medium or information reproduced from the recording medium, in a computer, a rewriting program for rewriting a firmware program for performing control processing for recording or reproducing information on the recording medium stored in the program memory The procedure for moving to the memory and the rewriting program stored in the buffer memory are executed to receive a new firmware program from the outside, and the received new firmware program is stored in the buffer memory and stored in the program memory. Erasing the firmware program, writing a new firmware program stored in the buffer memory to the program memory, and rewriting the firmware program stored in the program memory. Program for causing a row.   A computer receives a rewriting program for rewriting a firmware program for performing control processing for recording or reproducing information on the recording medium from outside, and temporarily stores the received rewriting program on the recording medium or information reproduced from the recording medium. A procedure for storing in the buffer memory, and a rewriting program stored in the buffer memory is executed to receive a new firmware program from the outside, and the received new firmware program is stored in the buffer memory. A firmware program stored in the memory is erased, a new firmware program stored in the buffer memory is written into the program memory, and a firmware program stored in the program memory is deleted. Program for executing the procedure to change come.   A procedure for moving a rewriting program for rewriting a firmware program for performing control processing for recording or reproducing information to / from a recording medium stored in a program memory to a work memory for storing a stack and variables at the time of execution of various types of processing; , Executing a rewriting program stored in the work memory to receive a new firmware program from outside, and temporarily storing the received new firmware program on the recording medium or information reproduced from the recording medium Store in the buffer memory, erase the firmware program stored in the program memory, write a new firmware program stored in the buffer memory to the program memory, and store the firmware program stored in the program memory. Program for executing a procedure for rewriting the wear program.   The program according to any one of claims 9 to 11, wherein a procedure for determining whether or not the rewriting program is normal and a replacement rewriting program received from the outside when determined to be abnormal by the procedure. A program for executing the procedure to be executed.   The computer-readable recording medium which recorded the program as described in any one of Claims 5 thru | or 11.

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