JPH02199439A - Controller for camera - Google Patents

Abstract

PURPOSE:To obtain the controller of a camera which can judge the precise transfer of data by detecting that a data transferring line which is held at a high level under the state that the data is not transferred is changed to a low level and outputting an abnormal signal. CONSTITUTION:A main CPU 201 and a sub-CPU 202 are used for the controller and the transfer of information is alternately executed by a serial interface. The interface has the data transfer lines Sin and Sout, transfer monitor lines Sdock and Ser and transfer synchronizing lines Sst and Src. When the data is transferred by the CPU 201, a data transfer synchronizing signal is sent to the line SST, first, and the data is transferred to the line Sout, next. The CPU 202 receives the data from the line Sout. The line Sout is held at the H level under the state that the data is not transferred. However, when it is changed to the L level, the CPU 202 detects it and outputs the abnormal signal. Thus, the abnormality of the data transfer and the abnormality of the actuation of the camera or the like are detected.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a camera control device that can detect abnormalities in data transfer. [Prior Art] Some cameras, for example, are separately equipped with a CPU that drives a photographing device and a CPU that stores and displays photographic information, and data is transferred between the two CPUs. In this way, in a camera having a plurality of CPUs, for example, as disclosed in Japanese Patent Application Laid-Open No. 62-232628,
When data is transferred from the control CPU to the display CPU after being reset by installing the power battery, the control CPU should be reset once it starts operating so that data can be transferred even after the reset is complete. Some devices send display data after a necessary predetermined period of time has elapsed. [Problem to be solved by the invention] In devices equipped with a plurality of CPUs as described above, generally the CPU
Data transfer between U is performed. In this case, although consideration has been given to ensure that the data is accurately transferred only on the transmitting side, it has not been possible to determine whether the data has been accurately received by the receiving side CPU. Therefore, even if the CPU on the receiving side is unable to receive data accurately due to a voltage drop in the power supply, disconnection of the power supply (battery), or other reasons, and an abnormality occurs in camera operation, etc., the abnormality will be detected. I couldn't give you a warning. The present invention has been made in view of the above, and an object of the present invention is to provide a camera control device that has a simple configuration and is capable of accurately determining data exchange. [Means for Solving the Problems] In order to solve the above problems, a camera control device of the present invention includes a first control circuit driven by a main power source, and a second control circuit driven by a main power source or a backup power source. circuit and
A transfer synchronization line that sends a transfer synchronization signal between the first control circuit and the second control circuit, a data transfer line that is held at a high level when no data is transferred, and a data transfer line that is held at a high level when no data is transferred. It is characterized by having means for detecting a change from a high level to a low level and outputting an abnormal signal. [Operation] The camera control device of the present invention connects a backup power source to a second control circuit that receives data from the first control circuit, sends a data transfer synchronization signal to the second control circuit, and starts data transfer. The data sent from the data transfer line
Received by control circuit. This data transfer line is held at high level without transferring data, and at this time, a change to low level is detected and an abnormal signal is output. For this reason, the data transfer line that transfers data can also be used, without using a dedicated line, and with a simple circuit configuration. Transfers in which the second control circuit cannot receive data accurately due to voltage drop in the power supply, disconnection of the power supply, or other reasons It is possible to detect an abnormality and an abnormality in the operation of the camera due to the abnormality. [Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings. 1 to 6 show a camera to which the present invention is applied. FIG. 1 is a front view of the camera, FIG. 2 is a rear view of the camera, FIG. 3 is a plan view, and FIG. 5 is a view showing the display on the finder, and FIG. 6 is a view showing the display on the back cover. The camera of the camera body is connected to the main body 10 as shown in FIG. front cover 20,
It is composed of a decorative panel 30 and a back cover 4o, and a front cover 2
A decorative panel 3o is engaged with the front side of the front cover 2.
0 is engaged and screwed so as to cover the main body 1o. The back cover 4o and the battery cover 41 are integrally assembled to the bearing portion 42a of the main body mounting body 42 via the hinge shaft 43, and the main body mounting 442 is engaged with the main body 10 and further fixed with screws. The main body 10 is formed with an unexposed film storage chamber 14 and an exposed film storage chamber 15 with an image frame section 13 in between. The cartridge 1 is stored in the unexposed film storage chamber 14 and the exposed film F is provided in the exposed film storage chamber 15 and is wound up by a roll 16. A front base plate 17 is provided in the center of the main body 10, and a lens barrel frame 2 equipped with a photographing lens 5o is mounted on this front base plate 17.
2 is provided integrally with the lens barrel 51 and movable in the optical axis direction,
It is designed to collapse. Further, the upper surface of the front cover 20 is provided with a release button 2, a close-up button 3, and a main switch button 4. Photographing lens The photographing lens 50 is composed of four lenses in four groups, and is attached to the lens barrel frame 22 via supports 52 and 53, and the lens barrel frame 22 is attached to the lens barrel 51. This photographing lens 50 is of a between-type type in which a shutter 54 is disposed between the lenses. Su1e” announcement

[The two-ring finder mechanism uses an Albada bright frame see-through finder. This finder 60
is provided with displays as shown in Fig. 5, including shooting range frames 61, 62, AF frame 63, rough distance measurement completion (lit) and distance warning (blinking) displays 64, and close-up mode (lit). A display 65, a grit mark 66, etc. are provided. During photographing, the focus adjustment mechanism changes the distance between the photographic lens 50 and the film surface according to the distance to the object, and adjusts the focus so that the image of the object is correctly focused on the film surface. As a distance measuring mechanism for this focus adjustment, a light emitting AF lens 70 and a light receiving AF lens 71 are provided on the upper part of the front base plate 17, and are covered with AF windows 72 and 73 of the decorative panel 30. distance is used. A lens barrel 51 holding a photographic lens 50 is extended by the drive of a motor 170, and the lens group is driven straight to perform focus adjustment. The lens barrel 51 has a photographing window 55 on the front side, and this photographing window 55 is covered with a lens barrier 140 to protect the photographing lens 50 inside. Shutter Mechanism The shutter mechanism has the function of providing the necessary amount of exposure to the film over time, and also the function of blocking unnecessary light outside of the exposure time. A shutter motor 80 is driven to open and close the shutter 54, and the shutter 54 is a program shutter and further uses a self-timer. In order to give proper exposure to Ryo 111 old 1-frame film, the amount of exposure is adjusted by measuring the brightness and darkness of the light on the subject side that falls on the screen. A Cd5 (cadmium sulfide) light receiving element 90 is used as a light receiving element that converts an electrical signal according to the amount of incident light. 1. The flash tube 100 of the strobe mechanism is fixed above the unexposed film chamber 14 of the main body 1o, and is covered by the window 101 of the decorative panel 30. In the automatic light emission mode, the light is automatically emitted when the brightness is low, and the capacitor 7 of the charging circuit is always automatically rechargeable and is disposed close to the exposure film storage chamber 15 of the main body 1o. Film winding The film winding mechanism uses an automatic winding method using a motor 110 and is driven via a winding unit 111. Auto-loading film rewinding that starts when the release button 2 is pressed after closing the back cover 4o.The film rewinding mechanism automatically rewinds the film when the last frame has been photographed. Stop. For rewinding, the film counter is decremented and the film feed mark is displayed in the opposite direction. ■ The camera back 40 has a control display section 12 for auto date and shooting information.
0 is provided through the back cover base plate 44, and a film confirmation window 6 is further formed. Further, the LCD section decorative plate 1a0 of the camera back 40 includes a date display section 121 and a shooting information display section 12.
2 is provided. Furthermore, the mode switching button SSI
There are provided a date mode switching button SS2, a correction point selection button SS3 for selecting a correction point for year, month, date, and time, and an addition button SS4 for adding up the date display. One 3V lithium battery 8 is housed in the battery compartment 18 of the main body 10, and can be replaced by the user by opening and closing the battery cover 41. In addition, it functions as an autodate and also as a backup power source for the main power source.
One coin battery 9 is provided in the battery storage chamber 45 of the back cover 40. Auto Date As an auto date, a digital clock with a liquid crystal display is built into the control display section 120, and the date display section 121 provided on the LCD section decorative plate 1a0 on the 4° back cover displays "year, month, day,"
"Month/Day/Year", "Day/Month/Year", "Date/Hour/Minute" or OFF mode are displayed, and the above-mentioned date mode switching button SS2, correction part selection button SS3 for selecting the correction part of year/month/day, hour/minute, respectively. , is adjusted by operating the addition button SS4 for adding the date display. The photographing information display section 122 of the photographing information display back cover 40 includes a battery remaining amount display 122a and a film counter 12, as shown in FIG.
2b and a film feed indicator 122C. In addition, flash charging mode 122d, self-timer mode 122e, automatic flash mode 122f, forced flash mode 122g, and non-flash mode 122h are switched and displayed, and all displays are liquid crystal displays. Warm-up stop type 11 Figures 7 to 10 show the operating mechanism of the lens barrel. Figure 7 is a cross-sectional view of the lens barrel, Figure 8 is a cross-sectional view taken along The figure is the IX-IX sectional view of Figure 7, and Figure 10 is the 8th cross-sectional view.
It is a sectional view taken along line XX in the figure. As shown in FIG. 8, a support frame 21 is provided on the front base plate 17, and a lens barrel 51 is provided on the support frame 21 so as to be movable back and forth in the optical axis direction, and the lens barrel 51 is collapsible. moreover,
A lens barrel frame 22 is fixed to the lens barrel 51, and the two operate as one. A support portion 22a formed at the lower end of the lens barrel frame 22 supports the bearing 1.
57 to be slidably supported on a guide shaft 158, and as shown in FIG. 9, it is movably supported on a drive shaft 160 via a female screw bearing 159. Guide shaft 1
One end of 58 is attached to the presser plate 161, and the other end is attached to the front base plate 17.
One end of the drive shaft 160 is rotatably supported by a presser plate 161 fixed to the front base plate 17, and the other end is rotatably supported by the front base plate 17 via a bearing 162. The rotation 160 causes the lens barrel frame 22 to move linearly in the optical axis direction. A tip 163a of a position regulating member 163 inserted through the front base plate 17 is in contact with the support portion 22a of the lens barrel frame 22, and this position regulating member 163 is supported by the front base plate 17 via a spring 164.
Backlash between the drive shaft 160 and the female threaded bearing 159 of the lens barrel frame 22 is absorbed so that the lens barrel frame 22 can operate accurately. The female screw bearing 159 is supported by a presser plate 165 fixed to the support portion 22a of the lens barrel frame 22.
This holding plate 165 prevents the female threaded bearing 159 from coming off from the lens barrel frame 22. The drive shaft 160 is provided with a drive gear 166, which is connected to an intermediate gear 167.1 as shown in FIG.
The output gear 171 of the motor 170 is meshed with the output gear 171 of the motor 170 through the intermediate gears 167, 168, 169, and the drive screw is transmitted to the drive gear 166 through the intermediate gears 167, 168, 169. axis 160
Rotate. The motor 170 is provided with a rotary blade 172, and the rotation speed thereof is detected by a photocoupler 173 and used as control information for moving the lens barrel 51 in the optical axis direction. Note that a photocoupler is a detection element that arranges a light source and a light receiving element to face each other and detects whether or not there is an opaque object between the light source and the light receiving element. Further, as shown in FIG. 8, an operating member 174 is provided on the mounting portion 22a of the lens barrel frame 22, and a contact piece 175 is provided on this operating member 174. As shown in FIGS. 8 and 10, this contact piece 175 is configured to slide on a control board 176 in conjunction with the lens barrel 51. This control board 176 is attached to the wall 17b of the front base plate 17, and the control board 176 is provided with a power supply contact 175b and camera body side contacts 1750 to 175g. , contact piece 1
75 is the collapsing stop position Y1, the initial position Y2 for normal shooting,
Information about the feeding amount count base point Y3 for normal photography, the initial position Y4 for close-up photography, and the feeding amount counting base point Y5 for close-up photography is given to the control unit, and these constitute a switch that detects the position of the photographing lens 50. are doing. This switch functions as a lens position switch or an AF trigger switch depending on the relationship with the contacts 1750 to 175g on the camera body side. This control board 176 has a protrusion 176a at one end engaged with a recess 1F C of the front base plate 1F, and a stopper 177.1 of the presser plate 161 having the other end 176b fixed to the front base plate 17.
78, and is supported so as to be movable B in the optical axis direction. A position adjustment window 176c is formed in this control board 176, and an adjustment bolt 179 is screwed into the wall 17b of the front base plate 17 through this position adjustment window 176c. Mounting shaft 179a of this adjustment bolt 179
is located at a position offset from the center of the head 179b, and the control board 176 is moved in the optical axis direction by rotation of the adjustment bolt 179 to adjust the position. As shown in FIG. 7, inside the lens barrel 51, a shutter drive mechanism and the like are arranged, and when the release button 2 is operated, a motor 8o is driven, and the power is transmitted from the output gear 81 to the intermediate gears 82, 83, 84. Shutter ring 8 through .85
6, the shutter ring 86 is rotated, and the three shutter blades 54c are opened and closed. Each of these shutter blades 54
C is rotatably supported by the lens barrel 51 via a support bin 87, and an engagement hole 54a is provided at the base of the shutter blade 54c.
An operating pin 88 fixed to a shutter ring 86 is engaged with this engagement hole 54a, and the rotation of this shutter ring 86 opens and closes the shutter blades 54c. The shutter ring 86 always has its protrusion 86b aligned with the lens barrel 51.
It is set so as to come into contact with a stopper 89a fixed to the side, and the stopper 89b serves as a position control during the opening operation. A contact piece 54b is formed on the shutter blade 54c, and a photocoupler 99 detects this contact piece 54b to perform time management for shutter control and detect shutter abnormality. As shown in FIGS. 7 and 8, the parallax correction side AF lens 71 rotates in the direction of the arrow with respect to the front base plate 17 using the support pin 180 as a fulcrum as the photographing lens 50 is extended, thereby correcting parallax. is now possible. This support pin 18
A spring 181 is installed between the support portion 71a of the light-receiving side AF lens 71 and the front base plate 17 on one side of the lens 0, and a correction spring 183 is installed between the support portion 71b and the balax correction bin 182 on the other side. ing. The balax correction bin 182 moves the lens barrel frame 22 in the optical axis direction together with the lens barrel 51, thereby pushing the light-receiving side AF lens 71 via the correction spring 183. Light receiving side AF lens 71
A balarax adjustment lever 185 is attached to the upper part of the lens barrel 51 with a vararax adjustment bin 184, and the protrusion 71c of the light-receiving side AF lens 71 comes into contact with this balarax adjustment lever 185 to regulate the rotational position of the lens barrel 51. While the camera moves between the initial position Y2 for normal photography and the initial position Y4 for close-up photography, balarax correction for perspective switching is performed. Shooting Mode Alternative Structure In the camera of this embodiment, when the release button 2 is pressed, a series of operations related to photographing start, and the exposed film winds up one frame and ends. Lurie's switch S1
is turned ON, and in the subsequent stroke, the second release switch S2 is turned ON. Lurie's switch S1 is O
When the time reaches N, shooting preparation operations such as distance measurement to measure the subject distance and photometry to measure the brightness of the subject are performed, and when the second release switch S2 is turned on, the shutter opens and closes.
Photography and post-photography processing operations such as film winding are performed. The closest shooting distance of general cameras is often set at around 0.6 to 1°2m, but with the camera of this example,
A normal photography mode and a close-up photography mode are provided in order to enable photographing of objects at a closer distance, so-called close-up photography, and to expand the photographable distance range. In the normal shooting mode, it is possible to shoot subjects from a predetermined normal shooting close distance to infinity (this range is called the normal shooting range), and in the close shooting mode, it is possible to shoot subjects from a predetermined close shooting close distance to a predetermined close shooting distance. It is possible to photograph objects at long distances (this range is called a close-up photography range), and the close-up distance for normal photography and the extreme distance for close-up photography are matched to make the normal photography range and the close-up photography range continuous. However, for example, three shooting modes, such as a close-range shooting mode, a medium-distance shooting mode, and a long-distance shooting mode, may be provided, or two shooting modes, such as a super close-up shooting mode, a close-up shooting mode, and a normal shooting mode, may be provided.
More than one shooting mode may be provided. The close-up button 3 is a button for switching the shooting mode. When this button is pressed in the normal shooting mode where the lens barrel 51 is at the initial position Y2 for normal shooting, the close-up switch is turned on, and the lens barrel 51 switches to the close-up shooting mode. reaches the initial position Y4 and stops, and the camera switches to close-up shooting mode. When the close-up button 3 is pressed when the camera is in the close-up shooting mode, the close-up switch is turned on, the lens barrel 51 moves backward, reaches the initial position Y2 for normal shooting, and stops, and the camera starts shooting normally. Switch to mode. When the lens barrel 51 is at the collapsing stop position Y1 and the camera is in the carrying position, when the main switch button 4 is pressed, the main switch is turned on, the power is excited, and the MAIN CPU 201, which will be described later, starts operating. , a power hold is performed to maintain the excited state of the power source, and the lens barrel 51
is extended, reaches the initial position Y2 for normal shooting, and stops.
The camera goes into normal shooting mode and power hold is released. When the camera is in the normal shooting mode or the close-up shooting mode, pressing the main switch button 4 turns the main switch ON, power is held in the same way as above, and the lens barrel 51 moves back to the collapsing stop position Y1. The camera reaches the mobile position and stops, and the power hold is released. The lens barrier 140 covering the photographing window 55 opens in conjunction with the extension of the lens barrel 51, and closes in conjunction with the retraction of the lens barrel 51 to cover the photographing window 55 and protect the photographing lens 50. It is structured to do this. Furthermore, when the camera is in the portable position, operations other than automatic film loading and film rewinding cannot be performed. Figure 11 is a schematic circuit block diagram of a camera to which the present invention is applied. This camera has MAINCPU2 as the first control circuit.
01 and 5UBCPU 202 as a second control circuit are used, and information is exchanged alternately through a serial interface. This serial interface is
U B CP U 202 Our MAIN CPU
Data transfer line S in, MA I N to 201
Data transfer line 5out from CPU201 to 5UBCP0202, transfer monitor line 5cJZock, S
er, transfer synchronization lines Sst, and Src. The MAIN CPU 201 executes control sequences for drive systems that require large currents and camera shooting operations, and
PU202 is the shooting information display section 12 of the camera back unit 203.
2 and also sends switch information to the MAIN CPU 201.
, and causes the MAIN CPU 201 to perform various controls. A power supply is connected to the DC-DC converter 204, and the DC-DC converter 204 is started by power control from the 5UBCPU 202, which is started by turning on the main switch or turning on the Lullies switch 5l(7). This causes the voltage Vdd to become MAINCP
U201km is given, and MAIN CPU 201 starts up. In addition, the voltage Vcc from the DC-DC converter 204
is the power supply for the control switches other than the release switches S1 and S2, the main switch, the close-up switch, and the mode changeover switch, the voltage Vdd is given as the power supply for each CPU, and the voltage vb of the lithium battery 8 is 5UB.
It is a power source for the CPU 202 and the strobe unit, and the voltage vb' of the lithium battery 8 is a power source for a drive system that requires a large current. In addition, there is a D in the strobe unit 205 that is different from 204.
A C-DC converter is provided. The activated MAIN CPU 201 contains analog information 20 including battery check information BC, photometry information AV, temperature information TH for temperature compensation of the motor driver, and shutter trigger delay time information STD for correcting the shutter opening.
It is entered as 6. This battery check information BC is transferred to the 5UBCPU 202 via a serial interface, and the 5UBCPU 202 displays this information as a battery remaining amount display 122a. Furthermore, MAlNC
Switch information 207 for the Dx switch, lens position switch, and AF trigger switch is manually input to the PU 201. In addition, distance measurement information is captured as an analog signal from the AF unit 208, and if the distance measurement result is within the photographable distance range according to the shooting mode selected at that time,
The MA I NCPU 201 lights up the APLED using the F display control, and also lights up the CULED in close-up shooting mode, and lights up the LBLED when the subject brightness is below a predetermined value in automatic flash mode. These constitute the F white display 209, and are displayed in the finder as a distance measurement completion and distance warning display 64, a close-up mode display 65, and a brick mark 66, respectively. In addition, the APLED blinks when the distance measurement result is outside the shooting distance range according to the shooting mode selected at that time, and the LBLED lights up when the forced flash mode is on, and when the subject brightness is set to a predetermined value in non-flash mode. Flashes when the value is below. When the second release switch S2 is turned on, the MAIN CPU 201 performs lens motor control to control the lens motor driver 210 based on distance measurement information.
The motor 170 is driven to extend the photographic lens 50 and stop it at a predetermined position. At this time, the position of the photographic lens 50 is controlled based on the trigger information of the AF trigger switch produced when the contact piece 175 comes into contact with the main body side contact 175e or 175G and the motor rotation speed information from the photocoupler 173. Since the photographing lens 50 is extended according to the distance measurement information, the trigger information from the F trigger switch is used to detect the base point Y3 or Y5 (depending on the selected photographing mode) for counting the amount of extension of the photographic lens 50. From this count base point Y3 or Y5, motor 1
Control is performed to stop the motor 70 when it has rotated a predetermined value. Then, according to the photometric information AV, shutter motor control is performed to control the shutter motor driver 211, and the motor 80 is driven to operate the shutter 54 to expose the film. At this time, photocabra 9
9, the opening and closing of the shutter 54 is detected. When this exposure is completed, the lens motor driver 21
0 is controlled, and the photographic lens 50 is set to the initial position Y2 or Y.
4 (depending on the selected shooting mode),
A film motor control is performed to control the film motor driver 212, and the motor 110 is driven to wind the film. At this time, while reading the switch information from the perforation switch 213, it is checked whether the film has been wound by one frame. The 5UBCPU 202 sends a charging signal to the strobe unit 205, and the strobe unit 205 sends a charge completion signal to the 5UBCPU 202, thus performing EF control between the two. Light emission control of strobe unit 205 is MAINCPtJ201
The flash tube 100 emits light. The self-timer display 5 LED 214 is controlled by the external display control of the 5UBCPU 202. The 5LIBCPIJ 202 is driven by a coin battery disposed on the back cover 40, a voltage Vdd from the DC-DC converter 204, and a voltage vb from the lithium battery 8 via a backup circuit 215 and a reset circuit 216. Further, switch information 217 such as a release switch, main switch, close-up switch, back cover switch, etc. is input to the 5UBCPU 202, and
has a date module 218, into which switch information 219 from a date mode switch, select switch, and set switch is input, and an LCD drive that outputs a liquid crystal display drive signal for date imprinting and date display. Do this. Also, 5L
The IBCPU 202 outputs signals for driving the counter and other liquid crystal displays disposed on the back cover unit 203, and drives the counter LCD. In addition, back cover unit 2
03 is provided with a mode changeover switch 220, which allows mode changeover by manual operation. Control circuit operating sequence FIG. 12 shows the operating sequence of the circuit blocks of the present invention, including the sequence of the MAIN CPU 201 and the 5U
It is divided into BCPU202 sequences. The 5UBCPU 202 receives the IR by the reset signal ACL.
It is initialized by the subroutine, starts operating from the start, and monitors information input to the microcomputer from the MODE=1 determination. Then, when the 51=1 determination turns on the Lurie's switch S1, a film autoload error is determined by the flag ΦAL=1 determination, and if the 51=1 determination indicates an autoload error, the ALS
The ub routine (2) displays an autoload error and ends. Also, the flag φREW-EN
If it is determined that D=1 and the film has finished rewinding, R
The process moves to the EWSub routine (3), where the end of film rewinding is displayed, and even if the No. 1 Lurie switch S1 is ON, it will not operate unless the back cover is opened. Furthermore, if the flag Φ5TT=1 is determined and the shutter is abnormal, the process branches and does not accept the signal. If these flags are not set, apply a power halt with PH←1 to start up the power, and then turn on the MAIN CPU.
Start 201. When the MAIN CPU 201 is started, the I10 port is set and the RAM is cleared using I10SET and RAMCLR, a battery check is performed in the BCSub routine, and DX switch information is read in the DXSub routine. Read each piece of information and use the serial interface on the SO to convert the battery check information, DX switch information, and test information into 5 bits of information.
Serially transferred to UBCPU202, BC display Sub
Display the remaining battery power in a routine. Here, if the remaining capacity of the battery 8 is less than a predetermined value, an error E is assumed and the operation is stopped. If the remaining capacity of battery 8 exceeds a predetermined value, 5UB
So of CPU202, LD2 of MAINCPU201
In order to proceed to the Sub routine, LD2Sub instruction information is sent, and a branch 1 determination is made in Sl of the MAIN CPU 201. When the program moves to the LD2Sub routine, the lens position is checked and the collapsing stop position and the like are determined by flag φSEP. In the LD2Sub routine, if the lens position is the initial position for normal shooting, the MAIN CPU 201
The process moves to branch 1 judgment. On the other hand, in the 5UBCPU 202, the lens position is the initial position for normal shooting, and the flag Φ
If rewinding is completed with REW=1 determination,
At So, the REWSub instruction information is transferred to the MAIN CPU 201 and the process ends. If the camera back is open according to the camera back switch information when 5b=o is determined, the flag φALB is determined to be 1, and the process moves to the WSub routine and i"MA I NCPU 201's SI branch 2
transfer the W Sub instruction information. Flag ΦC
= If the counter is zero in O judgment, flag ΦDX =
1 judgment determines whether the loaded film is a DX film or not, and if it is a non-DX film, the So
ALSu for branch 2 judgment of sr of MAINCPU201
b After transferring the instruction information, the 5UBCPU 202 enters the autoload waiting state, and the MAINCPU 201 performs the AL
The autoload operation is performed by the Subroutine. If the film is counted up, or if the counter is zero and it is a DX film, the information transferred by the LD2Sub reach is determined and the Φ5EP
When =11, the lens barrel 51 is at the initial position for normal photography or close-up photography, so photography is possible; when Φ5EP=OO, the lens barrel 51 is at the collapsing stop position, so the process ends and Φ5EP In the case of =01, the lens barrel 51 was extended but stopped at an undetermined position, so it is moved back and is at the retracted stop position, so the automatic light emission mode is returned to and the process ends. When the lens barrel 51 is at the initial position for normal photography or close-up photography, the second release switch S2 is turned off in the 51-1 determination.
If it is F, charge the strobe main capacitor in the CHGSub routine, and if it is ON, the flag Φ
If TEST=1 is determined and the test mode is set, test processing is performed, and if it is not the test mode, S. The data is transferred using the serial interface. here,
MainRout main routine instruction, flag ΦMO
The DE mode information and the counter information of the flag φC are 4-bit information and are transferred to the SI branch 2 determination of the MAIN CPU 201. The 5UBCPU 202 is waiting in the AFSub routine, and the MAINCPU 201 makes a branch 2 judgment with SI, and when it moves to the AESub routine, it reads the photometry information, roughly reads the distance measurement information in the AFSub routine, and sends this distance measurement information to the 5UBCPU 202. AFSu
Transfer to routine b. This distance measurement information is R[AF] or R[CAF], where R[AF] is RAM information for distance measurement in normal shooting mode, R[CAF] is RAM information for close-up shooting mode distance measurement, In both cases, 4 bits are transferred twice. The 5UBCPU 202 determines 52=1 and waits for the second release switch S2 to be turned on, and the MAINCPU 201 uses the FLEDSub routine to turn on the distance measurement AFLED, and in the case of close-up shooting mode, turns on the CULED. LBL when the subject brightness is lower than a predetermined value in lighting mode, automatic flash mode, or forced flash mode.
The ED lights up, and the APLED blinks if the distance measurement results are slower than the shooting distance range, or if they are continuous, and the L
The BLED is in a non-emission mode and blinks when the subject brightness is lower than a predetermined value. 5 When the second release switch S2 is turned ON by the 52=1 judgment of the UBC CPU 202, the serial transfer port of Sin changes from the normal low state to the high state with %Sin←1.
Send 5in=1 information to MAINCPU201, 5U
The BCPU 202 waits 16m5 hours and sets Sin←O to ensure that the FLEDSub routine of the MAIN CPU 201 shifts to SI, and then determines whether or not it is in the self-timer mode by checking the flag ΦMODE. If not in self-timer mode, R[ST
D] Transfer the information to MAIN CPU 201 in 8 bits. This STD information is 8-bit information of the shutter trigger relay time film, and after winding the film,
Information is exchanged in the Sub routine, and the information is sent to M.
AINCPU201 (7) Read with W S u b &-chi, transfer to 5UBCPU202, 5UBC
The PU202 stores this information, and the M
It is sent to AINCPU201. In the case of self-timer mode, move to 5ELFSub Re-chin and press R.
Transfer [STD]. When this STD information is sent to MAIN CPU 201, s
r, the 5UBCPU 202 waits in the 5DSub routine, and the MAINCPU 201 changes the lighting time for imprinting, depending on whether the ISO zone is 4 or higher, and if it is 150400 or higher, DATET←1. Then, DATEX←1 is set, and this signal is output for 5 ms as a signal for emitting light to imprint the date. When this signal is output, the light is emitted for about 10 ms and the date is imprinted. When this is completed, initialize by setting DATEX←0 and DATET←0, and use the AFLDSub routine to initialize the shooting lens 5.
0 is fed out, and the shutter 54 is opened and closed in the 5DSub routine. If an activation signal for the shutter 54 is not received while the shutter 54 is being opened or closed, a flag ΦSTT is generated. If a failure occurs during the opening or closing process of the shutter, the flag φ5TT=
1, and this information is sent to the 5UBCPU 202 to determine if there is a problem. If there is no abnormality, the flag φ5TT=O is sent, and MA
The INCPU 201 returns the photographing lens 50 in the LDRSub routine, moves to the WSub routine, and winds the film. The 5UBCPU 202 judges whether or not it is in the self-time mode after 7 lags ΦMODE, and if it is not in the self-time mode, it shifts to the film winding of the WSub routine. In the case of the self-timer mode, the mode display is set to automatic light emission mode, the flag φMODE is set to automatic light emission mode, and then the process moves to winding of the WSub reachin film. The operating sequence as described above takes place, but with 5LIB
The CPU 202 operates from the start, and before the second release switch S2 is pressed, the MODE=1 determination determines whether the mode switch is ON or OFF, and the MODE
1, that is, if the mode switch is ON, the flag Φ5TT
= 1 judgment is used to judge the shutter trouble, and if it is abnormal, no signal will be received from now on.If it is normal, the mode display will be changed, and the mode information will be changed with the flag φMODE, and the flag φMODE will be used to change the mode information. The self-timer mode is determined, and if it is not the self-timer mode, the MODE=O determination is made and the mode switch is released, and then the MODE=1 determination is made again. In the case of self-timer mode, set 1 to the timer by setting T←1s.
If the second is set and the mode switch is ON for 1 second or more when it is determined that MODE=1, the feeding display is evacuated when it is determined that it is over, the self display is turned OFF, and the rewind display is blinked. Then, in this blinking state, the second
When release switch S2 is turned on, PH←1, ΦA
Set L←0, start the MAINCPU 201, restore the feeding display, set it to automatic light emission mode, set the feeding display to 0FFL/, display a battery tick in the BC display subroutine, and execute S o i: RE W S u b Serial transfer of instruction information to MAIN CPU 201 and REW
Manual rewinding of the film is performed in the Subroutine. Furthermore, if the second release switch S2 is not turned on, if the MODE=1 determination indicates that the mode switch is OFF, the rewind display is turned off, the feed display is roughly restored, and the automatic flash mode is displayed. , flag φMOD
Set E to automatic flash mode and exit. If it is determined that MODE=1 and the mode switch is ON, it waits for the second release switch S2 to turn ON. Then, when the second release switch S2 is OFF in the determination of 51=1 by the 5UBCPU 202, when the main switch is turned on and 5cn=1, the collapsing switch is performed. Here, the collapsible barrel switching flag ΦScu is 0, and P
Set H←1 and start MAZNCPU201. Also,
When the close-up switch is turned on and 5cu=1, close-up collapsing switching is performed and the collapsing switch flag is set to ΦScu←1. Flags 41BC, 41DX from MAINCPU201,
After receiving the ΦTEST information, display the battery check in the BC display subroutine, and then display the LD with the serial output of So.
ISub instruction, 5cu1 report in flag is MAINCPU2
Transferred to 01. This information is MAINCPU20
1 (7) Sl (7) sent to branch 1 judgment, LDI Sub
The lens barrel is driven in the routine, and the flag φSEP information is 5.
It is transferred to the UBCPU 202 and the lens position is determined from this flag ΦSEP information in the LDI Sub routine. When the flag Φ5EP=11, the lens barrel 51 is at the initial position for normal photography or close-up photography, and the strobe capacitor is charged in the CHGSub routine. Flag φ
At 5EP=OO, the lens barrel 51 is at the collapsing stop position, and at flag Φ5EP=01, the lens barrel 51 is extended but stopped at an undetermined position, so it is moved back to the collapsing stop position, and the normal shooting mode is selected. , displays the automatic light emission mode, sets the flag φMODE to the automatic light emission mode, and ends the process. The 5BSub routine of the 5UBCPL 1202 checks the status of the camera back at 1-second intervals, and monitors whether the camera back is opened based on camera back switch information. Next, the test mode will be explained. This test mode is for checking the camera's performance, and tests are performed using the counter display on the back cover. Flag φTES
When T=1 is determined, S LED← in test mode
By setting it to 1, the test mode is confirmed and four types of tests are performed: automatic light emission mode, strong light emission mode, non-light emission mode, and self-timer mode. TESTI information is transferred in automatic flash mode, and the second Lurie's switch S
When 1 is ON, the zone information when metering is displayed, and when the second release switch s2 is turned on, the shutter is released and the automatic exposure mechanism can be tested, and both the metering information and exposure amount information can be tested. It will be done. TEST2 information is transferred in forced flash mode, and flashmatic is read from DX information. The DX information is displayed for each zone, and the aperture value can be controlled using Flashmatic according to the displayed information. In this test, clear the counter and feed display and set the 5 LED to 0. CHG Sub &
- Charge the battery using the chin. Also, TEST in non-emission mode
3 information is transferred, the AF zone information is displayed with the second release switch S2, the lens is driven with the second release switch S2, and the lens is extended to the AF information.
This makes it possible to know the movement stroke of the photographic lens. TEST4 information is transferred in the self-timer mode, and a test is performed to see if the shutter is open using the Lullies switch S1. These mode tests can be canceled with the mode switch. Furthermore, when 5UBCPU202 has 7 lags φ5TT=1, it enters the sequence of symbol C, saves the transfer segment, flashes all segments for a predetermined time, returns to lighting, and when 51=0 is determined, the No. 1 Lurie's switch S1 is activated. Wait for it to finish. In addition, in the above operation sequence, the sequence from symbol 1 is to turn off power hold at PH←0, wait 200m5, 51=0, MODE=O. It ends with 5cn=O1Scu=0. Further, the sequence from symbol E is entered due to a battery abnormality, etc., and the flag ΦBC4-00 is set to protect the battery, the battery is turned off, and the power hold is turned off in the same manner as described above, and the sequence ends. FIGS. 13 and 14 are flowcharts for returning to the initial position due to an abnormality in the taking-out lens movement, and for switching to the initial mode in conjunction with retraction from an undefined position. Further, FIG. 15 is a time chart for detecting an abnormality in the operation of extending the photographic lens up to just before the AF lens drive, and FIG. 16 is a time chart for detecting an abnormality in the operation of extending the photographic lens after the AF lens drive. Use the 5th Lurie's switch to determine whether autoloading is in progress, whether the camera back is closed after rewinding, or whether a shutter abnormality has occurred (Step 1-1). If not, set the PH to 1 and power hold. Then, a battery check is performed, the DX code is read, and data transfer is performed (steps 1 to 4). Figure 17 shows a data transfer time chart from MAINCPU to 5UBCPU.
1 raises a pulse on the transfer synchronization line Sst to declare the start of transfer. 5tJBCPU2O5 outputs a pulse on the transfer synchronization line Src, and from the fall of this pulse, the first 6 steps (61μ5X6-366μs)
Thereafter, the data on the data transfer line 5out is read every 5 steps (61 .mu.x5,305 .mu.s). After detecting the fall of the pulse on the transfer synchronization line Src, the MAINCPU 201 starts the timer with a delay of 16 to 36 μs, and locks the monitor transfer for 160 μs.
clock (1 cycle: 320 μs) and transfers 4 bits. With this data transfer, 5UB
The CPU 202 reads 4-bit data, but if it does not detect a pulse rise on the transfer synchronization line Sst for 1 to 2 seconds in the reception standby state, it sets the transfer monitor line Set to 1.
shall be. The data transfer line 5out is held at a high level without transferring data, but the transfer synchronization line Sst
If the data transfer line 5out changes from high level to low level under the condition that transfer has not started yet, this is detected and an abnormal signal is output. In this way, the data transfer line that transfers data can also be used, without using a dedicated line, and with a simple circuit configuration, it is possible to detect data transfer abnormalities caused by voltage drop in the power supply, disconnection of the power supply, etc. It is possible to detect abnormalities in camera operation, etc., and issue a warning by, for example, extinguishing the battery display. FIG. 18 is a data transfer time chart from the 5UBCPU to the MAINCPU, and the 5UBCPU 202 raises a pulse on the transfer synchronization line Src to declare the start of transfer. The MAIN CPU 201 receives this and outputs a pulse on the transfer synchronization line Sst. 5UBCPU202
When it is detected that the transfer synchronization line Sst has become a high level H, a pulse is lowered on the transfer synchronization line Src, and this becomes the timing for starting the transfer. From now on, after 4 steps (61μ5X4=244μs)
5UBCPU 202 sends out the first data. MAI
After detecting the fall of the pulse on the transfer synchronization line Src, the NCPU 201 starts a timer with a delay of 16 to 36 μs, and then reads 4 bits at a cycle of 256 μs. If the 5UBCPU 202 does not detect the rise of the pulse on the transfer synchronization line Sst for 1 to 2 seconds after the rise of the pulse on the transfer synchronization line Src, it stops the subsequent processing and sets the transfer monitor line Set to 1. Such data transfer is performed, the remaining battery level is checked based on the battery information, and if the remaining battery level is less than a predetermined value, a battery warning is issued, the power hold is turned off, and the process ends (steps 5 to 7). If the remaining battery power exceeds a predetermined value, the remaining battery power will be displayed.
The lens barrel position is determined (steps 5 and 8). When the lens barrel 51 is at an undetermined position other than the collapsing stop position, the initial position for normal photography, or the initial position for close-up photography, a timer is set to limit the collapsing operation time, and the PHM is set to 1.
to hold the large current power supply vb', and turn the lens barrel 51
When the lens barrel 51 starts collapsing (steps 10 to 12), it is determined whether the lens barrel 51 has reached the collapsing stop position based on whether the lens position signal SEP becomes 1, and if the lens barrel 51 is not at the collapsing stop position even after a predetermined period of time has elapsed. is ■b'P which holds the power supply
HM is set to 0, power hold is released, and the process ends (steps 13 to 15.7). Then, when the lens barrel 51 reaches the collapsing stop position, a pulse counter for setting the number of pulses is set, and the pulsed lens drive signal AFC from the photocoupler 173 reaches AFC=1 within a predetermined time.
or AFC=0 within a predetermined time.
When FC=1 and AFC=O, the pulse counter counts down (steps 16 to 24). Then, if the number of pulses reaches a predetermined number, or in step 22
Or, if the timer exceeds at 24, stop the collapsing operation, initialize the shutter blades, release the vb' power hold, set the flag ΦSEP to 01 (steps 25 to 27-1), and judge whether to stop during rewinding. Step 28 of
Hejyump. If the lens barrel 51 is at the collapsing stop position, the flag ΦSEP is set to OO, and then a determination is made to stop during rewinding in step 28. If the lens barrel 51 is at the initial position for normal photography or close-up photography, the flag ΦSEP is set to OO. 1
After setting the value to 1, a determination is made to stop the rewinding in step 28. In step 28, it is checked whether rewinding has been stopped midway, and if it has been stopped, rewinding is performed (step 29). When rewinding is complete, check whether the back cover is open or closed. If it is closed, check to see if the film counter display is zero or greater than zero (step 30.31). If it is zero, the loaded film is DX. It is checked whether it is a film or not, and if it is a DX film, it is autoloaded (steps 32 and 33). If the back cover is open, the film counter exceeds zero, or the film counter is zero and the loaded film is not a DX film, the flag ΦSE is set.
The lens barrel position information is checked using P (step 34), and if the flag Φ5EP=OO, the power hold is released and the process ends (step 35). If the flag Φ5EP=01, a predetermined initial mode is set and displayed, power hold is turned off, and the process ends (step 36.7). When the flag Φ5EP=11, the first Lurie's switch S
1 is ON or OFF (step 37), and if it is OFF, the strobe capacitor 7 is charged (step 38). If it is ON, it is determined whether the test mode is specified, and if the test mode is specified, a camera test is performed (steps 39, 40), and if the test mode is not specified, photometry, Distance measurement for normal photography or close-up photography is performed, and display in the finder is performed based on this information (steps 41 to 43). Next, it is determined whether the second release switch S2 is ON or not, and if it is not ON, the second release switch S1 is
is OFF, the strobe capacitor 7 is charged (steps 44 to 46), and the Lullies switch S1 is turned ON.
, the second release switch S2 is turned ON again.
Determine whether it is OFF. 2nd release switch S2 is O
If N, if the viewfinder display is turned off and the self-timer mode is set, the process moves to a self-subroutine that activates the self-timer (steps 47 to 4).
49). If it is not the self-timer mode, a date light emission signal is output, the large current Vb' power source is held, and an AF counter is set based on the calculation by the MAIN CPU 201 based on the distance measurement result (steps 50 to 52). Then, the AF lens drive to advance the photographing lens 50 to the in-focus position is started, a timer is set to limit the lens advance time, and the normal photographing AF trigger signal S A NT or the close photographing AF trigger signal 5CAT In steps 53 to 56), it is determined whether the barrel 51 has reached the advance amount count base point Y3 for normal photography or the advance amount count base point Y5 for close-up photography within a predetermined time. If it is an AF lens drive failure that does not reach any of the feeding amount count reference points, the process proceeds to step 57 and performs the same collapsing operation as described above. However, after the collapse is stopped, the hold on the vb' power source is released, the power hold is released, and the process ends. In step 55, when the mirror W451 reaches one of the above-mentioned extension amount count base points and the AF trigger signal 5NAT or 5CAT is output, and the set AF counter value is greater than zero, the lens barrel is extended. A timer is set to limit the time, and if the lens drive signal AFC does not become 1 within a predetermined time, it is determined that the AF lens drive is abnormal and the process is performed in step 57 and jumps to step 73.
~75), perform the same barrel collapsing operation as above. In addition, if AFC reaches 1 within a predetermined time, the timer that limits the lens barrel extension time is set again, and AFC reaches 1 within a predetermined time.
If it does not become 0, it is assumed that the AF lens drive is abnormal and the step 57 jumps (steps 76 to 78).
If the AFC becomes 0 within a predetermined time, the AF counter is counted down (step 79). Continuous AF
Such steps 73 or 680 are repeated until the counter reaches zero (step 8o). If the AF counter reaches zero or step 52
If the AF counter is set to zero, the motor 170 is switched to constant speed operation by the governor (step 81), a pulse counter is set to set a predetermined number of pulses, and a timer is set to limit the lens barrel extension time. set,
If the lens drive signal AFC does not become 1 within a predetermined time, it is determined that the AF lens drive is abnormal and jumps to step 57 (steps 82 to 85), and if the AFC becomes 1 within a predetermined time, the lens barrel extension time If the AFC does not become 0 within a predetermined time after setting the timer to limit the AF again, it is determined that the AF lens drive is abnormal and jumps to Step 57 (Steps 86 to 88), and if the AFC becomes 0 within a predetermined time Count down the pulse counter set to a predetermined number of pulses (step 8)
9.90). These steps 83 to 9 continue until the pulse counter reaches zero (step 90).
0 is repeated, and when the pulse counter reaches zero, A
Stop the F lens drive (step 91). Thereafter, it is confirmed that the lens drive signal AFC has stopped, the shutter is driven, the photographing lens 50 is moved backward, and when the initial position for normal photography or close-up photography is reached, the film is wound (steps 92 to 95). Then, charge the strobe capacitor 7, release the hold on the ■b' power supply,
Release power hold and exit (step 96.9)
7). [Effects of the Invention] As described above, the camera control device of the present invention connects a backup power source to the second control circuit that receives data from the first control circuit, and sends a data transfer synchronization signal to the second control circuit. The data sent from the data transfer line is received by the second control circuit, and the data transfer line is held at a high level without transferring data. At this time, a change in the low level is detected and an error is detected. Since it outputs a signal, it can also be used as a data transfer line to transfer data, without using a dedicated line.
With a simple circuit configuration, it is possible to detect data transfer abnormalities caused by voltage drops in the power supply, power disconnections, and other causes, and furthermore, to detect abnormalities in camera operation and the like caused by these.

[Brief explanation of the drawing]

1 to 6 show a camera to which the present invention is applied. FIG. 1 is a front view of the camera, FIG. 2 is a rear view of the camera, FIG. 3 is a plan view, and FIG. ■-■ sectional view, Fig. 5 shows the viewfinder display, Fig. 6 shows the back cover display, and Figs. 7 to 10 show the operating mechanism of the lens barrel.
Fig. 7 is a sectional view of the lens barrel, Fig. 8 is a sectional view taken along the line ■-■ in Fig. 7, Fig. 9 is a sectional view taken along IX-IX in Fig. 7, and Fig. 10 is a sectional view taken along the line X-X in Fig. 8. 11 is a schematic circuit block diagram of a camera to which this invention is applied, FIG. 12 is an operation sequence of the circuit block of this invention, and FIGS. 13 and 14 are initial positions due to an abnormality in the photographing lens extension operation. A flowchart for switching to the initial mode in conjunction with recovery and storage from an undefined position. Figure 15 is a time chart for detecting an abnormality in the movement of the photographing lens until just before the AF lens is driven.
Figure 16 is an abnormality detection time chart of the taking lens extension operation after AF lens drive, and Figure 17 is the MAIN
FIG. 18 is a data transfer time chart from the CPU to the 5UBCPU. FIG. 18 is a data transfer time chart from the 5UBCPU to the MAIN CPU. In the figure, numeral 10 is the main body, 201 is the MAIN CPU, 202
is 5UBCPU, S in is data transfer line, 5o
ut is a data transfer line, Sci. ck and Set are transfer monitor lines, and Sst and SrC are transfer synchronization lines. Figure Figure Figure 10 *AFC=I (High)ni button @+S, IO+3)m
strJ3-AFLD stem

Claims (1)

[Claims] a first control circuit driven by a main power source; a second control circuit driven by a main power source or a backup power source; a transfer synchronization line that sends a transfer synchronization signal to the first control circuit and the second control circuit; It has a data transfer line that is held at a high level when no data is being transferred, and means that detects that the data transfer line changes from high level to low level when no data is being transferred and outputs an abnormal signal. A camera control device characterized by: