JP6313962B2 - Electronics - Google Patents

Description

The present invention relates to an electronic equipment that operates based on programs stored in the internal memory.

  In recent years, many electronic devices such as medical devices and office devices are provided with a control circuit such as a CPU (Central Processing Unit) and the CPU operates based on a program code stored in an internal memory. It is supposed to be.

  In addition, as with application programs such as computers, even in electronic devices with a built-in CPU, the program code can be updated (upgraded) after the device is completed or shipped, and the function of the device can be expanded or corrected. ing. An example of such an update is described in Patent Document 1, for example.

JP 2009-98993 A

  By the way, as one method of the update operation, there is a method using a power key. Specifically, when the power key is pressed by the user, the update is started simultaneously with the activation of the device. According to this method, when an update is started in a state where the device is already activated, it is difficult to update a program that is already in operation, but all the programs can be updated. .

  On the other hand, some electronic devices of this type have a function of forcibly shutting down the power when a power key is pressed for a long time (for example, 10 seconds) in case the software becomes abnormal. Incidentally, the power key used in such a case is generally a momentary operation type push button switch (sometimes referred to as a momentary switch), which outputs an ON signal only when it is pressed and releases the finger. And automatically returns to the position before pressing and outputs an OFF signal (or does not output a signal).

  For this reason, if the user presses the power key to start the update and then continues to press and hold the power key, the power will shut down during the update, and as a result, in some cases, the device can be restarted. There was a risk of serious damage such as disappearance.

The present invention has been made in view of the above, even if there is a user error when updating, to provide an electronic equipment capable of avoiding incurring significant damage.

One aspect of the electronic device of the present invention is:
An electronic device that updates programs according to user operations,
A power key,
A control unit having a function of sequentially updating a plurality of programs according to an operation of the power key by a user, and a function of shutting down a power according to an operation of the power key by a user;
An electronic device comprising:
The controller is
In a state in which it and the power supply is accessible state to the outside of the program is shut down to update, if the power key is pressed, the function of starting the update of the program,
A function of shutting down the power when the power key is continuously pressed for a predetermined period after the power key is pressed to turn on the power in the state;
A function of updating the boot loader program in a period later than the predetermined period;
And shutting down the power supply during the update of the boot loader program .

  According to the present invention, it is possible to avoid serious damage even if there is an operation mistake such as a long press of the power key during the update and the power supply is shut down.

The top view which shows the external appearance structure of the electrocardiograph which concerns on embodiment The block diagram which shows the principal part structure of this invention The flowchart which shows the update process sequence by embodiment Flow chart showing update processing procedure according to comparative example

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a top view showing an external configuration of an electrocardiograph to which the program update method of the present invention is applied. The electrocardiograph 10 includes a touch panel 11, a recorder 12, and an operation unit 20. The operation unit 20 includes a power key 21 and a plurality of operation key groups 22. The operation key group 22 is a so-called custom key, and includes a start / stop operation key for instructing start / stop of measurement.

  On the touch panel 11, an electrocardiogram waveform as a measurement result is displayed. In addition, various setting screens and operation menu screens are displayed on the touch panel 11, and the user can perform various settings and operation instructions using the touch panel 11. In addition, the electrocardiograph 10 has a connection part (not shown) for connecting an electrocardiographic electrode, a memory card such as an inserted SD card 40 (FIG. 2), a communication cable, and an internal circuit for signal transmission. It has an interface (I / F) 33 (FIG. 2) for performing transmission and reception, a CPU (Central Processing Unit) 30 (FIG. 2) for performing measurement calculation and operation control, and the like.

  FIG. 2 is a block diagram showing a configuration of the electrocardiograph 10. Note that the block diagram of FIG. 2 shows only the configuration related to the present invention.

  The CPU 30 performs electrocardiogram measurement calculation, operation control of the entire electrocardiograph 10 and the like according to a program held in the software holding unit 31. The software holding unit 31 is a rewritable storage device, and is a flash memory in the present embodiment.

  An operation signal from the operation unit 20 is sent to the CPU 30, the update control unit 32, and the power supply unit 34. The CPU 30 performs processing instructed by the operation signal in accordance with a program stored in the software holding unit 31.

  When the update control unit 32 receives an operation signal from the operation unit 20 indicating that the power key 21 and a predetermined specific key in the operation key group 22 are simultaneously pressed, the update control unit 32 is held in the software holding unit 31. Update the installed program. The update is performed by acquiring a new program from the SD card 40 or the like via the interface (I / F) 33 and rewriting the program held by the software holding unit 31 with this new program.

  The electrocardiograph 10 has a power supply unit 34. When the power supply unit 34 inputs an operation signal indicating that the power key 21 has been pressed for a predetermined time or longer from the operation unit 20, the power supply to the entire electrocardiograph 10 is supplied. Stop (ie shut down) the supply. In the present embodiment, the shutdown is performed when the power key is pressed for 10 seconds. The power key 21 is a momentary operation type push button switch (sometimes referred to as a momentary switch), and outputs an ON signal only when pressed, and automatically returns to the position before pressing when the finger is released. Thus, an OFF signal is output (or no signal is output).

  FIG. 3 shows a processing procedure of the update control unit 32 according to this embodiment.

  When the update control unit 32 starts the process in step S0, it monitors whether the specific key and the power key 21 are simultaneously pressed in the next step S1, and starts updating the program if they are pressed simultaneously, and proceeds to step S2. . In the case of the present embodiment, first, the update is started when the user inserts the SD card 40 into the I / F 33 with the power supply shut down and obtains a positive result in step S1. Actually, it takes about 3 seconds until the power is turned on after the specific key and the power key 21 are pressed simultaneously, and the update is started immediately after that.

  The update control unit 32 writes the startup image program in step S2. This program is a program related to an image to be displayed on the touch panel 11 at startup. Next, the update control unit 32 writes the kernel program in step S3. Then, after writing another program, the update control unit 32 finally writes the boot loader program in step Sn, and ends the update process in step Sn + 1. Such an update order is described in the SD card 40. Then, the update control unit 32 reads the order and updates the program according to the order. Further, the update control unit 32 may set the update order in advance.

  Incidentally, at the time of writing each program at each step S2, S3,..., Sn, the previous program is erased and a new program is written there as needed. That is, instead of erasing all the previous programs all at once, the previous program is erased at each step S2, S3,..., Sn.

  The feature of the update process of the present embodiment shown in FIG. 3 is that the boot loader program is updated at a timing that avoids the timing when the power supply is shut down by long pressing of the power key 21. In order to realize this, the step of updating the boot loader program is the last in the processing procedure of FIG.

  FIG. 4 which shows the processing corresponding to FIG. 3 with the same reference numerals shows a comparative example with respect to the present embodiment. The difference from the update process of FIG. 3 is that the step of updating the boot loader program is performed first.

  In the present embodiment, it is assumed that the user presses the specific key and the power key 21 in order to start the update, and continues to press the power key 21 until the power is shut down. It is to end. In other words, if the specific key and the power key 21 are pressed at the same time, the update will start after a few seconds, so the user may release the key at that time, but the user accidentally turns off the power for 10 seconds. If the key 21 is kept pressed, the power supply is forcibly shut down during the update.

  The update of the boot loader program generally takes about 10 to 15 seconds depending on the size of the boot loader program. Therefore, in the case of setting to shut down the power when the power key is pressed and held for 10 seconds, as shown in the comparative example of FIG. 4, when the boot loader program is updated first, the power is shut down during the update of the boot loader program. The possibility increases. Therefore, in this embodiment, the boot loader program is updated at a timing that avoids the timing when the power supply is shut down by long pressing of the power key 21 by setting the order of updating the boot loader program behind the order of updating other programs. Updated.

  Incidentally, in an electronic device with a built-in CPU, the system start-up process after turning on the power executes a boot loader composed of a relatively small group of executable codes, and then this boot loader starts the initial operation system program of the system. Generally, it is a step-by-step activation operation such as reading a code. If the boot loader is broken, the initial code of the operation system program cannot be read, and as a result, the operation system may not be activated. Further, since the boot loader includes a program for controlling the update, there is a possibility that the update itself cannot be performed if the boot loader is broken.

  Therefore, if the boot loader is broken because the power supply is shut down during the boot loader update, the operation system may not be started next. Further, even if the operation system can be started, there is a possibility that the update cannot be performed. In consideration of this, the inventor of the present invention updates the boot loader during a period when the power supply may be shut down so that the boot loader is not destroyed even if the power supply is shut down due to a user's operation error. I didn't do it.

  Incidentally, when updating is performed according to the procedure shown in FIG. 3, if the power supply is shut down while the startup image program is being updated, the startup image program may be broken. In this case, the startup image is distorted or not displayed. However, if the boot loader is not broken, the electronic device can be started, so that the startup image program can be updated and repaired after startup, and no serious damage is received.

  As described above, according to the present embodiment, the boot loader program is updated at a timing that avoids the timing when the power supply is shut down due to the long press of the power key 21, so that the electronic device cannot be started. You will be able to avoid taking serious damage.

  In the above embodiment, since the power supply is set to shut down when the power key is pressed and held for 10 seconds, the boot loader program is updated in an order not to be updated at 10 seconds from the start of the update. If the setting is to shut down the power when the power key is pressed for 5 seconds, the boot loader program is not updated at that timing, and if the power is set to shut down when the power key is pressed for 20 seconds, The boot loader program should not be updated at the timing.

  In the above-described embodiment, the case where the boot loader program is updated in the last last order among the plurality of programs has been described. However, the update is not limited to the last last order, and is updated in the second or later order. May be. In order to update the boot loader program at a timing that avoids the timing when the power supply is shut down due to the long press of the power key 21, the time required to update the program before updating the boot loader program is the length of the power key 21 for shutdown. It only needs to exceed the push time. Therefore, if the update time of the first program exceeds the long press time, the boot loader program may be updated in the second order. However, since the update time of the program depends on the program size, the boot loader program can be updated while avoiding the shutdown timing if the order of updating the boot loader program is as late as possible.

  In the above-described embodiment, the case where a plurality of programs are updated one by one in order has been described. In short, the boot loader program is at a timing that avoids the timing when the power supply is shut down by pressing and holding the power key 21. It may be updated, and multiple programs may be updated simultaneously.

  In the above-described embodiment, the case where the update of the program is started when the power key 21 and a specific operation key other than the power key 21 are simultaneously pressed has been described. The program update may be started when is pressed. Specifically, the update control unit 32 may start the update when detecting that the power key 21 is pressed while the SD card 40 in which the update program is recorded is inserted. Good.

  In the above-described embodiment, the case where the present invention is applied to an electrocardiograph has been described. However, the present invention is not limited to this, and can be widely applied to electronic devices that can update programs.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

  The present invention is applicable to an electronic device that can update a program.

DESCRIPTION OF SYMBOLS 10 Electrocardiograph 11 Touch panel 12 Recorder 20 Operation part 21 Power key 22 Operation key group 30 CPU
31 Software Holding Unit 32 Update Control Unit 33 Interface (I / F)
34 Power supply unit

Claims (2)

An electronic device that updates programs according to user operations,
A power key,
A control unit having a function of sequentially updating a plurality of programs according to an operation of the power key by a user, and a function of shutting down a power according to an operation of the power key by a user;
An electronic device comprising:
The controller is
In a state in which it and the power supply is accessible state to the outside of the program is shut down to update, if the power key is pressed, the function of starting the update of the program,
A function of shutting down the power when the power key is continuously pressed for a predetermined period after the power key is pressed to turn on the power in the state;
A function of updating the boot loader program in a period later than the predetermined period;
And avoiding shutdown of the power supply during the update of the boot loader program,
Electronics. Before SL control section simultaneously with the operation of the power key, when a specific operation key other than the power key is pressed, to update the program,
The electronic device according to claim 1 .

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