JP3533005B2 - Programmable electronic device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable electronic device having a microcomputer such as a single-chip microcomputer and capable of changing its program.

[0002]

2. Description of the Related Art Electronic devices having a single-chip microcomputer such as a camera are known. The program (software) of such an electronic device is usually written in the ROM of the single-chip microcomputer. For this reason, the program cannot be rewritten. Therefore, if the program needs to be changed due to a bug or the like, it is necessary to re-develop a single-chip microcomputer with the changed program. There is a problem of cost.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to have a microcomputer and to easily execute its program (software).
It is to provide an electronic device whose program can be changed. Another object of the present invention is to provide a program changeable electronic device capable of improving the utilization efficiency of a rewritable memory (RAM) of a microcomputer.

[0004]

The above objects are achieved by the present invention described in (1) to (6) below.

(1) A first non-volatile memory in which a control operation program of an electronic device is recorded, a correction program for changing the control operation program and correction information about the correction program are divided into resident data and non-resident data. A second non-volatile memory separately recorded, a rewritable third memory, at least a reading means for reading the resident data and the non-resident data from the second non-volatile memory, and at least the resident data and Writing means for writing the non-resident data in the third memory; discriminating means for discriminating whether the correction program is resident data or non-resident data; and executing at least the control operation program and the correction program. And executing the control by the executing means. At a predetermined position in the motion program,
An electronic device capable of changing the control operation program by executing the correction program, wherein the resident data is read in advance from the second non-volatile memory by the reading means, and the resident data is written by the writing means. When writing the data to the third memory and executing the correction program, the determination means determines whether the correction program is resident data or non-resident data, and determines that the correction program is resident data. In this case, the executing means immediately executes the correction program, and when it is determined that the correction program is the nonresident data, the reading means causes the second program to be executed.
Read the correction program from the non-volatile memory, and write the correction program to the third program by the writing means.
An electronic device capable of changing a program, characterized in that the resident data is written in an area of the memory in which the resident data is recorded, and then the correction program is executed by the executing means.

(2) A first non-volatile memory in which a control operation program of an electronic device and at least one correction management processing program are recorded, a correction program for changing the control operation program, and correction information about the correction program, A second non-volatile memory separately recorded into resident data and non-resident data, a rewritable third memory, and at least a reading means for reading the resident data and the non-resident data from the second non-volatile memory. And a correction program corresponding to at least the writing means for writing the resident data and the non-resident data in the third memory, the correction information, and address information indicating an execution position in the control operation program. A first determining means for determining whether or not the correction program is present. An electronic device capable of changing the control operation program, including second determination means for determining whether the gram is resident data or non-resident data, and at least execution means for executing the control operation program and the correction program. And, at least one predetermined position in the control operation program recorded in the first non-volatile memory, a call means for calling the correction management processing program is provided, in advance,
The reading means reads the resident data from the second non-volatile memory, and the writing means
When the resident data is written in the third memory and the correction management processing program is called by the calling means, the first determination means causes a corresponding correction program to be performed based on the correction information and the address information. If it is determined that there is a corresponding correction program, the second determining means determines whether the corresponding correction program is resident data or nonresident data, When it is determined that the corresponding correction program is resident data, the execution unit immediately executes the correction program, and when it is determined that the corresponding correction program is nonresident data, the reading unit The correction program is read from the second nonvolatile memory, and the correction program is read by the writing unit. Write beam to a region where the resident data of the third memory is recorded, thereafter, by the execution means, reprogrammable electronic apparatus characterized by executing the patch.

(3) The correction information has correction program addition position information relating to a position where the correction program is added, and the first determining means determines that the address of the correction program addition position information and the address information is The program changeable electronic device according to the above (2), which determines that there is a corresponding correction program when they match each other.

(4) After the execution means executes the non-resident data correction program, the reading means reads the resident data from the second non-volatile memory, and the writing means causes the third resident data to be read. The correction program is deleted from the memory, and the resident data is restored to the third data.
The program changeable electronic device according to any one of (1) to (3), which is written in the memory.

(5) The program changeable electronic device according to any one of the above (1) to (4), wherein the non-resident data is a correction program that causes no trouble even if the time until the execution starts is relatively long.

(6) The second non-volatile memory is
Rewritable memory (1) to (5) above
2. A programmable electronic device according to any one of 1.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A programmable programmable electronic device of the present invention will now be described in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is a block diagram showing a circuit configuration example in an embodiment in which a programmable electronic device of the present invention is applied to a camera. As shown in FIG.
Is a photographing optical system (not shown) for forming a subject image on a film (silver salt photographic film), a viewfinder optical system (not shown), and a single-chip microcomputer (CP) as a control means.
U) 7.

The CPU 7 has a ROM (non-rewritable memory) which is a first non-volatile memory, a RAM which is a rewritable third memory, a reading means, a writing means, and a corresponding correction program. Discriminating means (first discriminating means), discriminating means (second discriminating means) for discriminating whether the correction program is resident data or non-resident data, and executing means for executing the program. (Not shown), and controls various functions in the camera 1, such as sequence control, photometric calculation (exposure calculation), execution of automatic exposure and automatic focusing, and the like.

The camera 1 of this embodiment has a function of changing (correcting) the control operation of the CPU 7, that is, changing the control operation program (software) of the camera 1 recorded in the ROM of the CPU 7. There is. Hereinafter, the “program” is simply referred to as “software”.

First, regarding the change of the software of the camera 1,
The outline will be described. A modification management process (decision, execution, copy, etc.) of the modified software is performed at an arbitrary part of the software (for example, a part where the software designer is likely to modify the software in the future) when designing the software. A call command (subroutine call) step of the management 1 process and the modification management 2 process, that is, a call means for calling the modification management process software is provided, and the modification management process software is recorded in the ROM of the CPU 7.
The call instruction step serves as an index for executing the correction software by interrupting the processing step of the software (hereinafter, simply referred to as "source software") before the correction is added.

In the case of partially changing the software, a correction software to be added to a predetermined portion of the software is created, and the correction software and correction information (additional position information, storage position information, copy) about the correction software are created. (Information) is written in a data storage / readout element (EEPROM) 8 described later.

At the time of reset start, the CPU 7 reads in advance from the EEPROM 8 the correction software necessary for executing the correction software, the correction information, etc. (resident data), and the CPU
It writes in RAM of 7.

When the modification management process is called during the execution of the original software, the information (address information) regarding the return address (return destination address) is obtained from the stack, and this address information and the modification software addition position of the modification information are acquired. Based on the information, which correction software is executed (whether any correction software is not executed) is determined. That is, it is determined whether or not there is correction software to be executed by the calling means depending on whether or not the addresses of the address information and the correction software addition position information match, and when it is determined that there is corresponding correction software. Runs its corresponding fixer,
If it is determined that there is no corresponding correction software, the process returns without executing any correction software.

Further, the correction software has a function of changing the return address. That is, the return address can be designated in the correction software, and thereby the return address at the time of return from the correction management process or the like can be changed.

When the correction software that causes no trouble even if the software execution time is relatively slow (correction software that causes no trouble even when the software execution time is relatively long) is used as nonresident data, and the correction software is executed To the correction software
It is read from the EPROM 8 and written in the RAM of the CPU 7 for execution. After the correction software is executed, the correction software is erased, and the resident data is read from the EEPROM 8 and written back in the RAM.

Hereinafter, the software of the camera 1 will be changed, typically, the software of the photometry / calculation processing (first embodiment), the software of the self-wait processing (second embodiment), the software of the battery check processing. (Example 3) and software for mode display processing (Example 4)
Will be explained respectively.

FIG. 2 is a schematic diagram showing the address space of the CPU 7. As shown in the figure, of the addresses "0000H" to "FFFFH" of the CPU 7, "0000"
"H"-"00FFH" is for I / O, "0100H"-
“037FH” is stored in RAM and “8000H” to “FFF”
"FH" is assigned to each ROM and "0"
"380H" to "7FFFH" are unused.

Further, the RAM address "0100"
"0100H" to "02" of "H" to "037FH"
7FH "is the variable area, and" 0280H "to" 037FH ".
Is the stack area.

The address "02" of the stack area
Of “80H” to “037FH”, “0280H” to
“02B7H” is set to E by the reset process described later.
The resident data is copied from the EPROM 8. In this case, "0280H" to "02B9H" can be used at the maximum. In addition, "02BA
"H" to "037FH" are used as the original stack. That is, "02BAH" to "037FH" include data required in the next step, a return address (return destination address) after completion of the subroutine, a variable to be temporarily saved, etc. corresponding to the progress of the software execution step. Is written. As described above, the area used for soft correction in this embodiment is the remainder of the stack area originally used as a stack.

Further, the ROM includes reset processing, correction management 1 processing, correction management 2 processing, photometry / arithmetic processing, self-wait processing, timer start processing, battery check processing, mode display processing, main processing, etc., which will be described later. Software for each execution step is recorded (stored).

An EEPROM 8 which is a second rewritable non-volatile memory is connected to the CPU 7 of the camera 1. The EEPROM 8 has a CPU of the camera 1.
The modification software and modification information for changing the software of No. 7 are recorded.

FIG. 3 is a diagram showing a map of the EEPROM 8. As shown in the figure, among the addresses "00H" to "7FH" of the EEPROM 8, "00H" to "1F"
"H" is the camera adjustment data, "20H" is the correction software number "06H", and "21H" is the copy byte number "3".
8H ”is recorded, and“ 22H ”to“ 2FH ”are recorded.
And "7AH" to "7FH" are unused.

In this case, the correction software number “06H” indicates that the number of correction software is “6”. Further, the number of copied bytes “38H” is the number of bytes of data copied from the EEPROM 8 to the RAM of the CPU 7 in the reset processing described later, that is, the number of resident data is “3”.
8H ”.

Further, the address "30" of the EEPROM 8
The correction information is recorded in "H" to "47H", and "48"
Correction software is recorded in "H" to "79H".
In this case, the additional position information “B address” (2 bytes) of the correction software 1 is recorded in “30H” and “31H”, and the storage position information “3B” of the correction software 1 is recorded in “32H” and “33H”. 02H "and" 98H "are recorded.

The additional position information "address B" of the correction software 1 indicates that the correction software 1 is added to the address B. In addition, the storage location information “02
After copying "H" and "98H", the correction software 1
It indicates that the data is recorded (stored) from the address “0298H” of the RAM of the CPU 7 and that the correction software 1 is resident data.

As a general rule, the "resident data" means data (correction software 1 to 5 and correction information of correction software 1 to 6 in this embodiment) which is always recorded in the RAM address of the CPU 7. .

The "non-resident data" is read from the EEPROM 8 when the software is executed, and is read by the CPU 7
The data (correction software 6 in this embodiment) recorded at the address of the RAM.

When the software is executed, nonresident data is overwritten (recorded) in the resident data recording area of RAM.
If so, the resident data is erased during that time.
Then, after executing the software, the non-resident data is erased, and the resident data is recorded again.

Thereafter, similar to the above, additional position information "address C" of the correction software 2 is stored in "34H" and "35H".
However, in "36H" and "37H", the storage position information "02H" and "9DH" of the correction software 2 is "38H".
And "39H", the additional position information "D
When the address is “3AH” and “3BH”, the storage location information “02H” and “AAH” of the correction software 3 are “3”.
The additional position information “E address” of the correction software 4 is stored in “CH” and “3DH”, and the storage position information “02H” and “ADH” of the correction software 4 is stored in “3EH” and “3FH”.
However, the additional position information “F address” of the correction software 5 is “42H” and “43H” in “40H” and “41H”.
Storage location information "02H" and "B" of the correction software 5
"0H" is recorded for each.

Further, "44H" and "45H" include
The additional position information "H address" of the correction software 6 is recorded,
Copy information “68H” and “12H” of the correction software 6 are recorded in “46H” and “47H”.
In this case, the copy information "68H" and "12H" of the correction software 6 is 12H from the address "68H" of the EEPROM 8 of the correction software 6, that is, "68H".
It indicates that "H" to "79H" are recorded and that the correction software 6 is nonresident data and is copied when the correction software 6 is executed.

Further, the correction software 1 is used for "48H" to "4CH", and the correction software 2 is used for "4DH" to "59H".
However, for "5AH" to "5CH", the correction software 3 is "5
The correction software 4 for "DH" to "5FH" is "60H" to
The correction software 5 for "67H" is "68H" to "79".
The correction software 6 is recorded in each "H".

Further, the CPU 7 of the camera 1 includes a photometric circuit (CdS) 2, an auxiliary light projecting circuit 3, a passive AF circuit 4,
Shutter / focus drive circuit 5, strobe circuit 6, film running detection circuit 9, date LED (light emitting diode)
Driver circuit 11, zoom information detecting means (zoom code) 13, ISO information detecting means (DX code) 14, photometric switch (SWS) 15, release switch (SW)
R) 16, mode switch (MODE) 17, strobe switch (STRB) 18, date switch (DAT)
E) 19, drive switch (DRIV) 21, back cover switch (BACK) 22, main switch (MAIN)
23, tele switch (TELE) 24, wide switch (WIDE) 25, panorama switch (PNRM) 2
6, an external LCD (liquid crystal display element) display means 27, a red lamp / green lamp / self lamp 28, a film motor drive circuit 29, and a zoom motor drive circuit 32 are connected to each other. The date LED driver circuit 11 is connected to the imprinting LEDs (7 pieces) 12, the film motor drive circuit 29 is connected to the film motor 31, and the zoom motor drive circuit 32 is connected to the zoom motor 33. It is connected. Hereinafter, these main operations will be described.

The photometric circuit (CdS) 2 measures the luminance of the subject and inputs the information (luminance information) to the CPU 7.
The CPU 7 performs photometric calculation (exposure calculation) based on the brightness information and film sensitivity information described later to set an appropriate exposure (shutter speed and aperture value).

The auxiliary light projecting circuit 3 projects auxiliary light for automatic focus detection. The camera 1 includes a line sensor (not shown) including a large number of light receiving elements, a pupil division optical system (not shown) that divides an incident light beam into a pair of divided light beams and forms an image on the line sensor, and the passive AF. It has a passive AF section (focus detection section) (not shown) including the circuit 4.

The pupil division optical system of the passive AF section divides the incident light beam into a pair of divided light beams and forms an image on the line sensor. Then, the pixel signal of each light receiving element is input to the passive AF circuit 4 from the line sensor. The passive AF circuit 4 calculates the image shift amount with respect to the position of the image formed on the line sensor from the pixel signal of each light receiving element input from the line sensor when the subject is located at a predetermined reference shooting position. The lens drive amount is calculated based on the image shift amount, and the information is output to the CPU 7.

The CPU 7 inputs a command signal for focusing on the shutter focus driving circuit 5 based on the information. The shutter / focus drive circuit 5 drives the focusing lens of the photographing lenses in response to this focusing instruction. Thereby, a focused state is obtained.

When the strobe drive command is input from the CPU 7, the strobe circuit 6 drives the strobe (emits light). From the film running detection circuit 9, a signal indicating the running (winding) of the film, that is, a signal corresponding to the running speed of the film (film running signal) is input to the CPU 7.

When the film is wound, the date LED driver circuit 11 drives (emits) the imprinting LED 12 to imprint information (date information) on the filming date and time on the film.

The zoom information detecting means 13 is composed of a zoom code and a zoom code contact piece which comes into contact with the zoom code. The zoom information (zoom code information) from the zoom information detecting means 13 is input to the CPU 7,
The CPU 7 grasps the focal length of the photographing optical system by reading the zoom information.

The ISO information detecting means 14 has a plurality of protrusion-shaped contacts which are biased toward the inside of a cartridge loading section (not shown) by coil springs, and arranged in the vertical direction (width direction) of the film. It has been configured.

When the cartridge is loaded in the cartridge loading section of the camera 1, each contact of the ISO information detecting means 14 comes into contact with a DX code (a code carrying film information such as ISO sensitivity of the film) provided in the cartridge. Then
A signal (film sensitivity information) corresponding to the ISO sensitivity of the film is input to the CPU 7 according to the conduction / non-conduction pattern of the DX code, and the ISO sensitivity of the film is read.

The photometric switch 15, the release switch 16, the mode switch 17, the flash switch 18, the date switch 19, the drive switch 21 and the main switch 23 are each a self-reset type switch, and when the switches are operated. , It turns from off to on and returns to off after the operation. When each of the switches is operated, a signal indicating that effect is input to the CPU 7.

When the photometry switch 15 is turned on, the photometry circuit 2 and the passive AF circuit 4 are activated respectively. When the release switch 16 is turned on, the shutter / focus drive circuit 5 drives a shutter (lens shutter) not shown. , Exposure control to the film, that is, photographing is performed.

When the mode switch 17 is turned on, a mode setting process is performed, whereby the automatic strobe mode,
A predetermined mode among the flash OFF mode (strobe non-flash mode), the flash ON mode (strobe flash mode), and the exposure correction mode is set.

When the strobe switch 18 is turned on, the red-eye reduction mode and the normal mode (red-eye non-reduction mode) are switched. When the date switch 19 turns on,
It is set to a predetermined mode among the year / month / day mode in which the imprinted data is “year / month / day”, the hour / minute mode in which the imprinted data is “hour / minute”, and the OFF mode in which imprinting is not performed.

When the drive switch 21 is turned on, drive setting processing is performed, whereby the self-shooting mode or the normal shooting mode (non-self-shooting mode) is set.

The back cover switch 22 is turned on when a back cover (not shown) of the camera 1 is closed, and is turned off when the back cover is opened. When the cartridge is loaded into the cartridge loading section of the camera 1 and the back cover is closed, the back cover switch 22 is turned on and the film motor 31 is driven by the film motor drive circuit 29, whereby the film runs to the shooting start position. And stop.

After shooting, the film motor drive circuit 29 drives the film motor 31 to wind the film to the next frame. Camera 1
When the zoom lever (not shown) is displaced to the telephoto side, the tele switch 24 is turned on and the zoom motor drive circuit 32
Drives the zoom motor 33 to the telephoto side while the tele switch 24 is on. As a result, the photographing optical system is extended and zooming to the telephoto side is performed.

When the zoom lever is displaced to the wide angle side, the wide switch 25 is turned on, and the zoom motor drive circuit 32 drives the zoom motor 33 to the wide angle side while the wide switch 25 is on. As a result, the photographing optical system contracts and zooming to the wide-angle side is performed.

When the panorama switch 26 is turned on, the photographing screen size is changed to the panorama size (aspect ratio: about 1: 3), and when the panorama switch 26 is turned off, the photographing screen size is a normal size (35 mm size, aspect ratio about 2: 3). Changed to 3).

Incidentally, in panoramic photography, normally, the photographing screen on the film is changed from the normal size to the panoramic size by shielding the upper and lower ends of the film from light.

On the external LCD display means 27, there are selected automatic strobe mode / strobe off mode / strobe on mode / exposure compensation mode, and the panorama switch 26 is turned on / off.
Necessary information such as off, date, etc. is displayed.

The red lamp of the red lamp, the green lamp, and the self lamp 28 is lit when strobe light is emitted during photographing, and blinks during strobe charging. Further, the green lamp lights up when the distance is determined to be proper as a result of distance measurement by the passive AF circuit 4, and blinks when the distance is determined to be incorrect.

Further, in the self-photographing mode, the self-lamp illuminates and flashes for a predetermined period of time after the release switch 16 is turned on until the shutter is driven. Next, the control operation of the CPU 7 of the camera 1 will be described.

(1) Reset Process FIG. 4 is a flowchart showing the operation of the CPU 7 during the reset process of the camera 1, and FIG. 5 is a schematic diagram showing the address space of the RAM after reset. Hereinafter, description will be given based on this flowchart.

The camera 1 executes a reset process when the power (battery) is turned on. In the reset process, first, the hardware is initialized (step 101). In this step 101, for example, initial settings of registers and ports are performed. Then, the RAM is initialized (step 10)
2).

Next, the correction software number is read from the EEPROM 8 into the RAM (step 103). In this step 103, as shown in FIG.
Write the correction software number "06H".

Next, the number of copied bytes is read from the EEPROM 8 into the RAM (step 104). In this step 104, as shown in FIG.
The number of copied bytes “38H” is written in

Next, from the address "30H", which is determined in advance in the EEPROM 8, the number of copy bytes "38H".
Minute data is copied to the stack area of RAM. As a result, the resident data, that is, the correction information (additional position information, storage position information and copy information) of the correction software 1 to 6 and the correction software 1 to 5 are set in the RAM (step 105).

In this step 105, as shown in FIG. 5, the correction information of the correction software 1 (additional position information "B address", storage position information "02" is stored in the RAM 280H to 283H.
"H" and "98H") to 284H to 287H and correction information of the correction software 2 (additional position information "C address", storage position information "02H" and "9DH") to 288H to 287H.
8BH with the correction information of the correction software 3 (additional position information “D address”, storage position information “02H” and “AAH”),
28CH to 28FH correction information of the correction software 4 (additional position information "E address", storage position information "02H" and "A
DH ") to 290H to 293H and correction information of the correction software 5 (additional position information" F address ", storage position information" 02 "
"H" and "B0H") and the correction information (additional position information "H address", copy information "68H" and "12H") of the correction software 6 are written in 294H to 297H, respectively.

The correction software 1 is stored in the RAM 298H to 29CH, and the correction software 2 is stored in the RAM 29DH to 2A9H.
Modify software 3 on AAH-2ACH, 2ADH-2AF
The correction software 4 is written in H, and the correction software 5 is written in 2B0H to 2B7H. Below, the main processing is continued.

The correction software 6 is non-resident data and is not copied in this reset process, but is copied to the stack area of the RAM when the correction software 6 is executed, as will be described later. After the correction software 6 is executed, the correction software 6 is erased and the RAM data is rewritten to the resident data.

(2) Correction Management 1 Processing and Correction Management 2 Processing FIGS. 6 and 7 are flowcharts showing the operation of the CPU 7 during the correction management 1 processing and the correction management 2 processing of the camera 1. Hereinafter, description will be given based on this flowchart.

As will be described later, at a predetermined position between various execution steps of the software, a call command step of the modification management 1 processing or modification management 2 processing (software of modification management 1 processing or modification management 2 processing is called in advance. (Call means)
Is provided, and the modification management 1 process or the modification management 2 process is executed each time the call command is issued.

In the modification management 1 process, it is first determined whether the modification in-execution flag (in-execution flag) = 1 (step 201). As will be described later, in the modification management 1 process and the modification management 2 process, an in-execution flag is set (execution flag = 1) before execution of the modification software, and an execution flag is set after execution of the modification software. It is set to be cleared (execution flag = 0). Therefore, during execution of the correction software, the in-execution flag is always set.

In-execution flag = 1 in step 201
If it is determined that the return, return. Also, step 2
When it is determined in 01 that the in-execution flag is not 1, the nest identification flag is cleared (nested identification flag = 0 is set) (step 202).

Next, the return address of the nesting 1 level (hereinafter, simply referred to as "nest 1") written in the stack is set in the memory ADR (step 2).
03). That is, the acquisition of the return address (address information) from the stack is set to nest 1.

The return address of the nest 1 is the return address read first from the stack (the address written last), and the return address of the nest 2 to be described later is the second read address from the stack. This is the return address (the address written to the penultimate position).

In the modification management 2 process, it is first determined whether or not the in-execution flag = 1 (step 204). Step two
If it is determined in 04 that the execution flag = 1, the process returns.

If it is determined in step 204 that the in-execution flag is not 1, the nest identification flag is set (the nest identification flag is set to 1) (step 203).

Next, the return address of the nesting 2 level (hereinafter simply referred to as "nest 2") written in the stack is set in ADR (step 206).
That is, the acquisition of the return address from the stack is set to nest 2.

After step 203 or step 206, 280H is set in the pointer PTR (step 207). Next, the number of correction software read by the reset process to the counter (COUNT) (in the present embodiment,
"6") is copied (step 208).

Next, it is judged whether or not counter = 0 (step 209). If it is judged that counter = 0, it means that the correction software is not prepared from the beginning or the program position of the caller of the correction management process. If there is no correction software to be executed in, return as it is.

In step 209, counter =
If it is determined that it is not 0, it is determined whether or not [PTR] = ADR (step 210). This step 21
[PTR] in 0 is 2 from the address indicated by PTR.
It is the RAM contents of byte length. Here, the correction software addition position information of the correction information copied to the RAM in the reset process, that is, the address is referred to. For example,
[280 when the PTR is set to 280H
[H] is “address B” as shown in FIG.

[PTR] = AD in step 210
If it is determined that it is not R, the PTR is incremented by 4 to refer to the additional position information of the next correction software (step 211).

Then, the counter is decremented by 1 (step 212), the process returns to step 209, and step 209 and the subsequent steps are executed again. If [PTR] = ADR is determined in step 210, it means that there is correction software to be executed, and hence the actual correction software execution processing is performed. First, in ADR, 0000H
(Initial value) is set (step 213).

Then, the execution flag is set (execution flag = 1) (step 214). Next, the PTR is incremented by 2 to refer to the storage position information of the correction software (step 215).

Next, whether or not [PTR] = 0XXXH,
That is, it is determined whether or not the number in the most significant digit of [PTR] is "0" (step 216). This step 216
[PTR] in is the RAM content of 2 bytes length from the address indicated by PTR. Here, the correction software storage position information of the correction information is referred to. For example, P
[282H] when 282H is set in TR
Is "0298H" as shown in FIG. Also,
“X” is an arbitrary number from 0 to F in hexadecimal notation.

When [PTR] = 0XXXH, the corresponding correction software is resident data, and the correction software is EEPR in the reset processing described above.
Copied from OM8 to RAM. In addition, [PT
When R] = 0XXXXH is not satisfied, the corresponding correction software is non-resident data, and the correction software is still
The data is not copied from the EEPROM 8 to the RAM (the correction software 6 has [PTR] = 6812H, so it is determined to be nonresident data).

[PTR] = 0X in step 216
If it is determined to be XXH, the corresponding correction software is executed based on [PTR] (step 217). For example, when [PTR] = 0298H, 29 of RAM
The correction software 1 recorded in 8H to 29CH is executed. Note that this subroutine will be described later in detail.

In step 216, [PTR]
If it is determined that it is not = 0XXXH, EEPRO
The correction software 6 is copied from M8 to RAM (step 218).

In this step 218, 68H to 79H (12H) of the EEPROM 8 based on [PTR].
The correction software 6 recorded in is read, and the correction software 6 is written in the RAM 280H to 291H.

Then, the correction software 6 recorded in the RAMs 280H to 291H is executed (step 219).
Note that this subroutine will be described later in detail. Then E
From EPROM8 to RAM, resident data (correction software 1
6 to 6 and the correction software 1 to 5) are copied (step 220).

In step 220, as shown in FIG. 5, the resident data is read from the EEPROM 8 and the resident data is written in the RAMs 280H to 2B7H.
The correction software 6 is returned to the same state as before being copied to the RAM.

After step 217 or step 220, the execution flag is cleared (execution flag = 0).
(Step 221). Next, it is determined whether ADR = 0000H (step 222). As will be described later, when the correction software 5 and 6 are executed,
A predetermined address is set in DR, whereby ADR ≠
It becomes 0000H.

At step 222, ADR = 0000
When it is determined to be H, the process returns. If it is determined in step 222 that ADR is not 0000H, it is determined whether the nest identification flag is 0 (step 223).

When it is determined in step 223 that the nest identification flag is not 0, that is, when the nest identification flag is 1, it is determined that the return address of the nest 2 written in the stack is set in ADR. The address is rewritten (step 224).

If it is determined that the nest identification flag = 0 in step 223, the return address of nest 1 written in the stack is rewritten to the address set in ADR (step 225).

After step 224 or step 225, the process returns. Next, Embodiments 1 to 4 for changing the software of the camera 1 will be described respectively.

(3) Change of software for photometry / calculation processing (Example 1) In the camera 1, if the software for photometry / calculation processing is appropriate, the automatic strobe mode is set as shown in Table 1 below. If it is, the flash turns off when Ev ≧ 10, turns on when Ev <10, and the low speed limit is Ev.
≧ 10 is set. Further, when the strobe OFF mode is set, the strobe is turned off regardless of the magnitude of Ev, and the low speed limit is set to Ev ≧ 6. Further, when the strobe ON mode is set, the strobe is turned on regardless of the magnitude of Ev, and the low speed limit is set to Ev ≧ 10. Also, if the exposure compensation mode is set, the flash will
Is turned off regardless of the magnitude of, and the low speed limit is Ev ≧
Set to 6.

[0096]

[Table 1]

FIG. 8 and FIG. 9 are flowcharts showing the operation of the CPU 7 during the photometry / calculation processing. As shown in the figure, in the photometry / calculation processing software, the strobe “OFF mode” determination processing should have been entered between step 307 and step 308. Suppose.

When the strobe “OFF mode” is set, as described above, the strobe should be turned off regardless of the magnitude of Ev, and the low speed limit should be set to Ev ≧ 6. , With this software, Ev <1 even if the flash is set to “OFF mode”.
If 0, the flash fires, and the low speed limit is set to Ev ≧ 10, and the low speed shutter (Ev ≧ 10
6) does not work. Therefore, such an inconvenience is corrected. Hereinafter, description will be given based on the flowcharts shown in FIGS. 8 and 9.

In the photometric / arithmetic processing, first, the photometric processing is performed (step 301). In this photometric processing, the brightness of the subject is measured by the photometric circuit 2 as described above. Then, as described above, the modification management 1 process is called (step 302).

In this case, the return address of nest 1 written in the stack is "address A", and each correction software 1
There is no "A address" in the correction software addition position information of ~ 6.
That is, there is no matching address.

Therefore, in the modification management 1 process in step 302, as described above, steps 209 to 2 are executed.
12 is repeatedly executed and counter = 0, and when it is determined that counter = 0 in step 209, step 302 is executed without executing any of the correction software 1-6.
Return to "A" after.

Next, a film sensitivity input process is performed (step 303). In this film sensitivity input processing, the ISO sensitivity of the film is detected by the ISO information detecting means 14 as described above.

Then, as described above, the exposure calculation is performed based on the luminance information from the photometric circuit 2 and the film sensitivity information from the ISO information detecting means 14 to obtain an appropriate exposure value (exposure value) Ev ( Step 304). In addition,
In this step 304, Bv + Sv is set to Ev. However, Bv is the subject brightness value, and Sv is the ISO sensitivity of the film.

Then, as described above, the modification management 1 process is performed (step 305). In this case, the return address of nest 1 written in the stack is "address B",
The correction software addition position information of the correction software 1 is “B address”. That is, there is a matching address.

Therefore, in the modification management 1 process in step 305, as described above, it is determined in step 210 that [PTR] = [280H] = ADR, and the process proceeds to step 213. In step 216, [P
TR] = [282H] = 0XXH, and then
The correction software 1 is executed (step 217).

FIG. 10 shows C when the correction software 1 is executed.
It is a flowchart which shows operation | movement of PU7. In the correction software 1, the low speed limit is set to Ev ≧ 10 even if the flash is in the “OFF mode” due to a soft mistake, and the Ev value of the exposure calculation result changes, so the Ev value is stored in the memory ME.
It is written in M and saved (step 701). Then, thereafter, the process returns to step 217 of the modification management 1 process. Hereinafter, as described above, after executing step 221 and thereafter, the process returns to the “address B” after step 305.

Then, the light emission flag is cleared (light emission flag = 0) (step 306). Note that the light emission flag = 0
In the case of, the strobe does not emit light at the time of photographing, and when the emission flag = 1, the strobe circuit 6 causes the strobe to emit at the time of photographing.

Then, it is judged whether or not the exposure correction mode is set (step 307). If it is determined in step 307 that the exposure compensation mode is not set, it is determined whether or not the flash is in the "ON mode" (step 308).

If the strobe "ON mode" is determined in step 308, a light emission flag is set (light emission flag = 1) (step 309). After step 309, or when it is determined in step 308 that the flash is not in the "ON mode", it is determined whether Ev <10 (step 310).

When it is judged that Ev <10 in step 310, Ev is set to 10 (step 31
1), a light emission flag is set (light emission flag = 1) (step 312).

If it is determined in step 307 that the exposure correction mode is set, Ev is decreased by 1.5 (step 313). Next, it is determined whether or not Ev <6 (step 314).

When it is judged that Ev <6 in step 314, Ev is set to 6 (step 315).
After step 315, after step 312, step 3
If it is determined in step 14 that Ev <6 is not satisfied, or if it is determined in step 310 that Ev <10 is not satisfied, then it is determined whether Ev> 17 is satisfied (step 316).

If Ev> 17 is determined in step 316, Ev is set to 17 (step 31
7). After step 317, or when it is determined in step 316 that Ev> 17 is not satisfied, the correction management 1 process is performed as described above (step 318).

In this case, the return address of the nest 1 written in the stack is "C address", and the correction software addition position information of the correction software 2 is "C address". That is, there is a matching address.

Therefore, in the modification management 1 process in step 318, as described above, it is determined in step 210 that [PTR] = [284H] = ADR, and the process proceeds to step 213. In step 216, [P
TR] = [286H] = 0XXXXH, and then
The correction software 2 is executed (step 217).

FIG. 11 shows C when executing the correction software 2.
It is a flowchart which shows operation | movement of PU7. The correction software 2 determines whether the flash is in the "OFF mode" (step 751). As will be described later, if the strobe is not in the "OFF mode", there is no need to make corrections, and the process returns.

In step 751, the flash is turned off.
If it is determined to be "mode", the light emission flag that may have been set due to a soft miss is cleared (light emission flag = 0) (step 752).

Next, it is determined whether Ev ≧ 10 (step 753). If it is determined in step 753 that Ev ≧ 10 is not satisfied, the strobe “OFF mode” is set.
However, the low speed limit of Ev ≧ 10 is set, and in order to correct this, Ev is set to the value of the memory MEM saved by the correction software 1 (step 754).

Then, it is judged whether or not Ev <6 (step 755). When it is determined that Ev <6 in step 755, Ev is set to 6 (step 75
6).

After step 756, if it is determined in step 751 that the flash is not in the “OFF mode”, if it is determined in step 753 that Ev ≧ 10, or if it is determined in step 755 that Ev <6 is not satisfied. , Step 217 of the modification management 1 process
Return to.

As described above, after executing step 221 and thereafter, the process returns to "address C" after step 318, the photometry / calculation process ends, and the process returns to the main routine.

As described above, the disadvantages of stroboscopic light emission and low speed limit in the strobe "OFF mode" due to a soft mistake can be corrected by a combination of two correction software.

(4) Change in software for self-waiting process (second embodiment) FIG. 12 is a timing chart showing the operation of the self-lamp during shooting in the self-shooting mode.

As shown in the figure, the specification of the self lamp is changed from "lights for 7 seconds, blinks at 1 Hz for 3 seconds" to "lights for 7 seconds,
Change to 2Hz blinking for 3 seconds ". FIG. 13 is a flowchart showing the operation of the CPU 7 during the self-wait process,
FIG. 14 is a flowchart showing the operation of the CPU 7 in the timer start process. Hereinafter, description will be given based on these flowcharts.

In the self-wait process, first, the interruption flag is cleared (interruption flag = 0) (step 40).
1). When the interruption flag = 0, it means that the interruption operation is not performed during the self-operation, and the photographing sequence after the return from the self-waiting process is continued and the exposure and the like are performed.

When the interruption flag = 1, it means that the interruption operation is performed during the self-operation, and after the return from the self-wait processing, the subsequent photographing sequence is interrupted.

Then, the self lamp is turned on (step 402). Next, a lighting flag is set (lighting flag = 1) (step 403). Then, the counter (COU
NT) is set to 7 (step 404).

Then, the set time (7000 msec) is set in the memory TIME, and the timer start process is performed (step 405). The return address after the execution of this timer start process is "D address".

The timer start process is executed by the memory TIME.
This is a general-purpose subroutine that copies the value set in to the timer register and starts the timer. As shown in FIG. 14, in the timer start process, the correction management 2 process is performed as described above (step 451). In addition,
The return address after this correction management 2 process is executed is "X address".

Here, since the return address of nest 2 written in the stack is the return address immediately before the "X address", it is "D address", and the correction software additional position information of the correction software 3 is obtained. Is "D address". That is, there is a matching address.

Therefore, in this modification management 2 processing, as described above, in step 206, the address of address D [288
Since H] is set to ADR, it is determined at step 210 that [PTR] = [288H] = ADR, and the routine proceeds to step 213. In step 216, [P
TR] = [28AH] = 0JXXXH, and then
The correction software 3 is executed (step 217).

FIG. 15 shows C when the correction software 3 is executed.
It is a flowchart which shows operation | movement of PU7. In the modification software 3, the counter is set to 13, that is, 7 to 1
3 (step 801), and then returns to step 217 of the modification management 2 process. Hereinafter, as described above, after executing step 221 and thereafter, the process returns to the “address X” after step 451 of the timer start process.

Then, the timer register sets the set time (7
000 msec) is set (step 452). Then, the timer is started (step 453), and then the process returns to the "address D" after step 405 of the self-waiting process.

Then, it is judged whether or not the main switch 23 is turned on (step 406). When it is determined in step 406 that the main switch 23 is turned on, the interruption flag is set (interruption flag = 1) (step 4
07) and then returns to the main routine.

If it is determined in step 406 that the main switch 23 is not turned on, it is determined whether or not the time is up (step 408). Step 40
When it is judged that it is not time up in 8,
Returning to step 406, step 406 and subsequent steps are executed again, and when it is determined that the time is up in step 408, the counter is decremented by 1 (step 409).

Then, it is judged whether or not the counter = 0 (step 410). When it is determined that the counter is not 0 in step 410, it is determined whether the lighting flag is 1 (step 411).

If it is determined in step 411 that the lighting flag = 1, the self lamp is turned off (step 4
12), clear the lighting flag (lighting flag = 0)
(Step 413).

If it is determined that the lighting flag is not 1 in step 411, the self lamp is turned on (step 414) and the lighting flag is set (lighting flag = 1) (step 415).

After step 413 or step 415, a set time (500 msec) is set in the memory TIME to blink at 1 Hz, and a timer start process is performed (step 416). The return address after the execution of this timer start process is "E address".

As shown in FIG. 14, in the timer start process, the correction management 2 process is performed as described above (step 451). The return address after the execution of this modification management 2 process is "X address".

Here, since the return address of the nest 2 written in the stack is the return address immediately before the "X address", it is the "E address", and the correction software additional position information of the correction software 4 is obtained. Is "E address". That is, there is a matching address.

Therefore, in this modification management 2 processing, as described above, in step 206, the address of address E [28C
Since H] is set to ADR, it is determined in step 210 that [PTR] = [28CH] = ADR, and the process proceeds to step 213. In step 216, [P
TR] = [28EH] = 0XXXH, and then
The correction software 4 is executed (step 217).

FIG. 16 shows C when executing the correction software 4.
It is a flowchart which shows operation | movement of PU7. The correction software 4 uses the memory TIM to blink at 2 Hz.
Set the set time (250 msec) to E, that is, change the set time from 500 msec to 250 msec (step 8
51) and thereafter, the process returns to step 217 of the modification management 2 process. Hereinafter, as described above, after executing step 221 and thereafter, step 451 of the timer start process
Return to "X address".

Then, the timer register sets the set time (2
50 ms) is set (step 452). Then
The timer is started (step 453), and then the process returns to "address E" after step 416 of the self-wait process.

Then, the process returns to step 406, and steps 406 and after are executed again. When it is determined that the counter = 0 in step 410, the self lamp is turned off (step 417) and then the process returns to the main routine.

As described above, even if the modification management 1 process is not called in the software to be modified, if the modification management 2 process is called in the general subroutine,
The modified software can be executed by the software that called the general-purpose subroutine.

In the second embodiment, one of the two calling positions of the timer start process, which is a general-purpose subroutine, is the correction software 3 for changing the value of the self-lamp ON / OFF control counter, and the other is blinking. The correction software 4 for changing the ON / OFF time of the self-lamp therein is additionally executed. As a result, the self-lamp specification is changed from "lighting for 7 seconds, blinking at 1 Hz for 3 seconds" to "lighting for 7 seconds, blinking at 2 Hz for 3 seconds".

(5) Change of software for battery check processing (Example 3) At the beginning of the design, the battery check (BC) was performed by monitoring the battery voltage 5 msec after the load was energized. After that, it was found that the battery voltage was not stable at "5 msec", and the value was changed to "10 msec".

FIG. 17 is a flowchart showing the operation of the CPU 7 during the battery check process. Hereinafter, description will be given based on this flowchart. In the battery check process, first, the BC warning flag is cleared (B
C warning flag = 0) (step 501). When the BC warning flag = 1, the BC warning is displayed by the external LCD display means 27 after the battery check process.

Then, the BCNG flag is cleared (B
CNG flag = 0) (step 502). BCN
When G flag = 1, BCNG display is performed by the external LCD display means 27 after this battery check processing.

Then, as described above, the modification management 1 process is performed (step 503). In this case, the return address of nest 1 written in the stack is “F address”,
The correction software addition position information of the correction software 5 is “F address”. That is, there is a matching address.

Therefore, in this modification management 1 processing, as described above, in step 210, [PTR] = [29
[0H] = ADR is determined and the process proceeds to step 213. Further, in step 216, [PTR] = [292H]
Then, the correction software 5 is executed (step 217).

FIG. 18 shows C when executing the correction software 5.
It is a flowchart which shows operation | movement of PU7. The correction software 5 turns on the BC load, that is, starts energizing the BC load (step 901).

Then, a wait process is performed (step 902). In this step 902, 10m
Continue energizing the BC load for 2 seconds. Next, the G address is set in the memory ADR (step 903), and thereafter, the process returns to step 217 of the modification management 1 process.

Thereafter, as described above, step 221 and subsequent steps are executed, and the return address (address F) of nest 1 written in the stack is rewritten to the address (address G) set in the memory ADR (step 225) and thereafter, the process returns to the "address G" after step 505.
In addition, since the return address has been changed from F address to G address,
Steps 504 and 505 are not executed respectively.

Then, the BC voltage is input (step 5).
06). In this step 506, the BC voltage is measured,
Convert the analog signal of the measured value into a digital signal,
input.

Then, the BC load is turned off, that is, BC
The energization of the load is stopped (step 507). Then
It is determined whether or not BC voltage <warning level voltage (step 508).

When it is determined in step 508 that BC voltage <voltage of warning level, it is determined whether or not BC voltage <voltage of NG level (step 509). Note that N
G level voltage <warning level voltage.

If it is determined in step 509 that the BC voltage is less than the NG level voltage, the BCNG flag is set (BCNG flag = 1) (step 510). Also,
If it is determined in step 509 that the BC voltage is less than the NG level voltage, the BC warning flag is set (BC warning flag = 1) (step 511). Above,
This battery check process ends, and the process returns to the main routine.

In the third embodiment, the value of the memory ADR is rewritten while the correction software 5 is being executed, so that the correction management 1
The return destination of the process is changed, and the two processes (steps 504 and 505) after the call position of the modification management 1 process are deleted. In this way, the correction software can delete an arbitrary processing block after the correction management processing (correction management 1 processing and correction management 2 processing).

(6) Change of software for mode display processing (Embodiment 4) The display by the external LCD display means 27 in the automatic strobe mode, strobe OFF mode, strobe ON mode and exposure compensation mode is shown in Table 1 above. The display specifications of the exposure compensation mode among these mode displays are changed as shown in Table 1 above.

FIG. 19 shows the CPU 7 in the mode display processing.
FIG. 20 is a flowchart showing the operation of the correction software 6
It is a schematic diagram which shows the address space of RAM at the time of execution. Hereinafter, description will be given based on this flowchart.

In the mode display processing, first, as described above, the modification management 1 processing is performed (step 601). In this case, the return address of the nest 1 written in the stack is “H address”, and the correction software addition position information of the correction software 6 is “H address”. That is, there is a matching address.

Therefore, in this modification management 1 processing, as described above, in step 210, [PTR] = [29
4H] = ADR, the process proceeds to step 213. Further, in step 216, [PTR] = [296H]
= 0XXXXXH, and as shown in FIG.
The correction software 6 recorded in 68H to 79H (12H) of the EEPROM 8 is read, and the correction software 6 is written to the RAM 280H to 291H (step 21).
8). Then, the correction software 6 is executed (step 219).

FIG. 21 shows C when executing the correction software 6.
It is a flowchart which shows operation | movement of PU7. The correction software 6 first calls again the mode display processing that is already being executed (step 951). Even in the mode display process called again, the correction management 1 process is first performed (step 601).

However, in this case, since the in-execution flag is already set (in-execution flag = 1), this modification management 1
In the processing, as described above, it is determined that the flag is being executed = 1 (step 201), the subsequent processing is not executed, and the process returns to “address H” after step 601 of the mode display processing.

Then, by the external LCD display means 27,
All mode marks are turned off (not driven) (step 6)
02). FIG. 22 is a schematic diagram showing each mark in the mode display. In step 602, the marks M1 to M4 shown in the figure are turned off.

Then, it is judged whether or not the automatic strobe mode is set (step 603). If the automatic strobe mode is determined in step 603, the external LCD display means 27 causes the mark M1 shown in FIG.
Turn on (drive) the "AUTO" mark (step 60)
4).

If it is determined in step 603 that the automatic strobe mode is not set, it is determined whether or not the exposure correction mode is set (step 605). Step 605
If the exposure compensation mode is determined in
The mark M4 shown in FIG. 22 is turned on by the D display means 27 (step 606).

If it is determined in step 605 that the mode is not the exposure correction mode, the mark M3 shown in FIG. 22 is turned on by the external LCD display means 27 (step 607).

Then, it is judged whether or not the strobe is in the "OFF mode" (step 608). When it is determined in step 608 that the flash is in the "OFF mode", the mark M2 shown in FIG. 22 is turned on by the external LCD display means 27 (step 609).

After step 604, 606 or 609, or in step 608, the strobe is turned off.
If it is determined that the mode is not "mode", the process returns to step 951 of the correction software 6, and thereafter it is determined whether or not the exposure correction mode is set (step 952).

When it is determined in step 952 that the exposure correction mode is set, the mark M3 shown in FIG. 22 is turned on by the external LCD display means 27 (step 953), and then the external LCD display means 27 is shown in FIG. The mark M2 is turned on (step 954). This allows
Output of the exposure compensation mode is displayed according to the display specifications. However, if the process returns as it is, step 602 and the subsequent steps of the mode display process will be executed again, so it is necessary to change the return address.

If it is determined in step 952 that the exposure compensation mode is not set, or after step 954,
Set address I in memory ADR (step 95
5) After that, the process returns to step 219 of the correction management 1 process.

Then, as shown in FIG.
Read the resident data from 8 and store the resident data in RAM
280H to 2B7H (step 220).
Hereinafter, as described above, the steps 221 and thereafter are executed,
The return address (address H) of the nest 1 written in the stack is rewritten to the address (address I) set in the memory ADR (step 225), and thereafter, "I" after step 609 of the mode display processing. Return to the address. Since the return address has been changed from the H address to the I address, steps 602-609 are not executed.

This is the end of the mode display process, and the process returns to the main routine. In the fourth embodiment, it is necessary to change the mode display processing and the correction software 6
After executing, there was a problem that the process before correction was executed again, and this was also solved.

That is, by making it possible to call a process including the correction software 6 from the correction software 6 (in this case, the correction software 6 is not executed), the correction management 1 processing is performed from the start position to the end position of the original software. You can get the same effect as moving it. Then, this makes it possible to prevent the original software from being executed again.

Further, since the modification software 6 is not strict in execution time, it is made nonresident and copied to the RAM at the time of execution. As a result, even if the stack area is insufficient, it is possible to deal with the necessary number of correction software.

As described above, according to the camera 1 of this embodiment,
When the modification management process (modification management 1 process, modification management 2 process) is called, which modification software is selected based on the address information acquired from the stack, that is, the return address and the modification software addition position information of the modification information. It is determined whether to execute (whether or not to execute any correction software), and the corresponding correction software is executed.
By writing the call command for the modification management process at an arbitrary position of the software, it is possible to design the software in which the modification software can be added at the position of the call command.

Then, the correction software and the correction information (correction software addition position information, correction software storage position information, copy information) are stored in the EEPROM 8 regardless of the labor-consuming, time-consuming, and costly method of developing a software-modified single-chip microcomputer. You can easily change the software by writing in.

This makes it possible, for example, to correct (delete) a software bug or improve the function of the camera 1. In addition, the camera 1 separates the correction software and the correction information into resident data and non-resident data, and EEPR.
It is recorded in OM8, and in principle, resident data is always RA.
Since the non-resident data recorded in M is copied to the RAM when the software is executed, the RAM utilization efficiency of the single-chip microcomputer can be improved. In particular, it is possible to execute (add) many correction software without replacing the RAM with a large capacity one.
The range of software revisions expands.

If the predetermined correction software is selected as either the resident data or the non-resident data, the following is preferable because there is no problem when executing the correction software and changing the software.

That is, the correction software that wants to shorten the time until the software starts to be executed is made to be resident data so that the correction software is immediately executed, and even if the time to start the execution of the software is relatively long. The correction software that does not cause any trouble, that is, the correction software that takes a long time to copy the software to the RAM and has no trouble even when the copy time is taken into consideration is non-resident data.

From another point of view, if the correction software that requires a large memory area for recording, that is, the correction software with a large amount of data is nonresident data, many other corrections can be made with a fixed memory capacity. Software and modification information can be made resident data, and RAM utilization efficiency is improved.

Further, in the camera 1, after executing the non-resident data correction software, the correction software is erased from the RAM, and the resident data is copied again to the RAM. Software can be modified by executing the modification management process.

Further, since the camera 1 has the modification management 2 processing for acquiring the address information from the nest 2 of the stack, the modification management 2 is provided at a predetermined position of the general subroutine called from many places. It is possible to add desired correction software to the position of each call instruction of the subroutine by writing one line of the call instruction of the process. That is, it is possible to design software in which correction software can be added to many places without significantly reducing the utilization efficiency of the ROM.

Further, since the correction software 5 and 6 of the correction software 1 to 6 of the camera 1 have the function of designating the return address, the correction software 5 and 6 are executed, so that The function equivalent to the fact that any part of the designated software is deleted or changed is obtained. Therefore, the range of software modification is expanded.

When the correction software is being executed, the camera 1 is prohibited from executing the correction software again.
That is, when the correction management process is called again while the correction software is being executed, the process returns without performing any processing in the correction management process. The original software (subroutine) can be called and executed. That is, multiple calls can be made.

Therefore, if a call instruction for the correction management process is provided in the software (subroutine), the original software (subroutine) being modified is called and executed in the correction software, and the return address is set to the predetermined address. By changing to, the call instruction of the modification management process in the original software (subroutine) is changed to another position (for example, the last).
The same function as that provided in can be obtained, and the range of software modifications can be expanded.

In this embodiment, the address information is acquired from the nest 1 or 2 of the stack. However, the present invention is not limited to this, and the address information is acquired from the nest 3 or more of the stack. It may be configured as follows.

The programmable electronic device of the present invention includes various cameras such as still video cameras, video cameras, and television cameras, in addition to the silver-halide photographic camera, various OA devices, and home appliances. It is applied to all electronic devices with microcomputers such as products and industrial machines. The program changeable electronic device of the present invention has been described above based on the illustrated configuration example, but the present invention is not limited to this.

[0192]

As described above, according to the program changeable electronic device of the present invention, a desired correction program can be added to a predetermined portion of the program (software), so that the microcomputer must be replaced. Without that, the program can be changed easily.

Particularly, since the electronic device of the present invention is provided with the resident data and the non-resident data, it is possible to improve the utilization efficiency of the third memory (RAM). In particular, the third memory has a large capacity. Many modification programs can be executed (added) without exchanging them, thus broadening the range of modification of the program.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration example in an embodiment in which a programmable electronic device of the present invention is applied to a camera.

FIG. 2 is a schematic diagram showing an address space of a CPU according to the present invention.

FIG. 3 is a diagram showing an EEPROM map in the present invention.

FIG. 4 is a flowchart showing the operation of the CPU during reset processing in the present invention.

FIG. 5 is a schematic diagram showing an address space of a RAM after reset in the present invention.

FIG. 6 is a flowchart showing the operation of the CPU during the correction management 1 processing and the correction management 2 processing according to the present invention.

FIG. 7 is a flowchart (continuation of FIG. 6) showing the operation of the CPU during the correction management 1 process and the correction management 2 process according to the present invention.

FIG. 8 is a flowchart showing the operation of the CPU during photometry / calculation processing in the present invention.

FIG. 9 is a flowchart (continuation of FIG. 8) showing the operation of the CPU at the time of photometry / calculation processing in the present invention.

FIG. 10 is a CPU when executing the correction software 1 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 11 is a CPU when executing the correction software 2 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 12 is a timing chart showing the operation of the self-lamp during shooting in the self-shooting mode according to the present invention.

FIG. 13 is a CP during self-wait processing according to the present invention.
It is a flowchart which shows operation | movement of U.

FIG. 14 is a CP during timer start processing according to the present invention.
It is a flowchart which shows operation | movement of U.

FIG. 15 is a CPU when executing the correction software 3 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 16 is a CPU when executing the correction software 4 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 17 is a flowchart showing the operation of the CPU during the battery check process in the present invention.

FIG. 18 is a CPU when executing the correction software 5 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 19 is a flowchart showing the operation of the CPU at the time of mode display processing in the present invention.

FIG. 20 is a RAM when executing the correction software 6 according to the present invention.
FIG. 3 is a schematic diagram showing an address space of FIG.

FIG. 21 is a CPU when executing the correction software 6 according to the present invention.
3 is a flowchart showing the operation of FIG.

FIG. 22 is a schematic diagram showing each mark of mode display in the present invention.

[Explanation of symbols]

1 Camera 2 Photometry Circuit (CdS) 3 Auxiliary Light Projection Circuit 4 Passive AF Circuit 5 Shutter / Focus Drive Circuit 6 Strobe Circuit 7 Single Chip Microcomputer (CPU) 8 Data Storage / Readout Element (EEPR)
OM) 9 Film running detection circuit 11 Date LED driver circuit 12 Imprint LED 13 Zoom information detection means (zoom code) 14 ISO information detection means (DX code) 15 Photometric switch 16 Release switch 17 Mode switch 18 Strobe switch 19 Date switch 21 Drive Switch 22 Back Switch 23 Main Switch 24 Tele Switch 25 Wide Switch 26 Panorama Switch 27 External LED Display 28 Red Lamp / Green Lamp / Self Lamp 29 Film Motor Drive Circuit 31 Film Motor 32 Zoom Motor Drive Circuit 33 Zoom Motor 101 Steps 105 to 225 Steps 301 to 318 Steps 401 to 417 Steps 451 to 453 Steps 501 to 511 Steps 601 to 609 Steps 701 step 751 to 756 step 801 step 851 step 901-903 step 951-955 step M1~M4 mark

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-55-118149 (JP, A) JP-A-57-155642 (JP, A) JP-A-4-252334 (JP, A) JP-A-3- 257644 (JP, A) JP-A-6-282488 (JP, A) JP-A-4-318624 (JP, A) JP-A-5-100838 (JP, A) JP-A-6-187143 (JP, A) JP-A-6-222917 (JP, A) JP-A-5-233266 (JP, A) JP-A-62-274341 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 9/06 G06F 9/46 G06F 12/08 G06F 12/12 G06F 9/40-9/42

Claims (6)

(57) [Claims] 1. A first non-volatile memory in which a control operation program of an electronic device is recorded, a correction program for changing the control operation program and correction information about the correction program are classified into resident data and non-resident data. Recorded second non-volatile memory, rewritable third memory, at least reading means for reading the resident data and the non-resident data from the second non-volatile memory, at least the resident data and the Writing means for writing non-resident data in the third memory; discriminating means for discriminating whether the correction program is resident data or non-resident data; and executing at least the control operation program and the correction program. Means for controlling the control by the execution means. An electronic device capable of changing the control operation program by executing the correction program at a predetermined position in the operation program, wherein the resident data is previously read from the second non-volatile memory by the reading means. The reading means writes the resident data in the third memory by the writing means, and when the correction program is executed, the determining means determines whether the correction program is resident data or non-resident data, and When it is determined that the correction program is resident data, the execution unit immediately executes the correction program, and when it is determined that the correction program is non-resident data, the reading unit causes the second program to be executed. The correction program is read from the non-volatile memory of, and the correction program is read by the writing means. Write beam to a region where the resident data of the third memory is recorded, thereafter, by the execution means, reprogrammable electronic apparatus characterized by executing the patch. 2. A first non-volatile memory in which a control operation program of an electronic device and at least one modification management processing program are recorded, a modification program for changing the control operation program, and modification information about the modification program are resident. A second non-volatile memory separately recorded into data and non-resident data; a rewritable third memory; and a reading means for reading at least the resident data and the non-resident data from the second non-volatile memory. At least based on the writing means for writing the resident data and the non-resident data in the third memory, the correction information, and the address information indicating the execution position in the control operation program, a corresponding correction program is stored. First determining means for determining whether or not there is a correction program An electronic device capable of changing the control operation program, including second determination means for determining whether the RAM is resident data or non-resident data, and at least execution means for executing the control operation program and the correction program. A call means for calling the correction management processing program is provided at at least one predetermined position in the control operation program recorded in the first non-volatile memory. , The resident data is read from the second non-volatile memory, the resident data is written to the third memory by the writing unit, and the modification management processing program is called by the calling unit, Based on the correction information and the address information, the discriminating means makes correspondence. If there is a corresponding correction program, and if it is determined that there is a corresponding correction program, the second determining means determines whether the corresponding correction program is resident data or non-resident data. If it is determined that the corresponding correction program is resident data, the execution means immediately executes the correction program,
When it is determined that the corresponding correction program is non-resident data, the reading unit reads the correction program from the second non-volatile memory, and the writing unit reads the correction program from the third memory. An electronic device capable of changing a program, characterized in that the resident data is written in an area in which the resident data is recorded, and then the correction program is executed by the executing means. 3. The correction information has correction program addition position information relating to a position to which the correction program is added, and the first determination means has the addresses of the correction program addition position information and the address information mutually. 3. The program changeable electronic device according to claim 2, wherein when there is a match, it is determined that there is a corresponding correction program. 4. After the execution means executes the non-resident data correction program, the reading means causes the second
4. The resident data is read from the non-volatile memory, the erasing program is erased from the third memory by the writing means, and the resident data is written to the third memory again. An electronic device capable of changing a program according to [1]. 5. The program changeable electronic device according to claim 1, wherein the non-resident data is a correction program that causes no problem even if the time until the start of execution is relatively long. 6. The program changeable electronic device according to claim 1, wherein the second non-volatile memory is a rewritable memory.