JPH0413691B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an input/output control device for a data imprinting control device for a camera. The applicant of the present application proposed a method in which a data imprinting device using a digital device is rationally housed inside the back cover of the camera, so that the imprinted data etc. can be easily observed from the outside. The company has filed an application for a data imprinting device. The data imprinting device for a camera according to the invention includes an LED element for imprinting data placed on the back cover of the camera facing the film, and a liquid crystal display placed on the back cover of the camera so that the display can be observed from the surface. A display device, an input device for inputting data arranged on the back cover of the camera so that it can be operated from the surface, a sensor that is photoelectrically coupled to the camera body side and detects the release operation of the camera, a clock function, and an input device. It has a storage function and a comparison/judgment function for the recorded data, and includes a control circuit provided on the back cover of the camera, and when time imprinting is specified by the input device, the control circuit uses the liquid crystal display device to In addition to displaying the time, the LED element is lit when the sensor output is generated, and when data input operation is specified, the data is displayed on the liquid crystal display device, and when the sensor output is generated, the LED element is lit.
It is configured to light up an LED element. When the control circuit is configured using a one-chip CPU, the control program is set in a mask ROM, so the specifications are limited to a single item. In the case of single-item specifications, even if there is room in the program memory section (ROM), once the specifications are satisfied, the remaining ROM will not be used. In addition, if a certain amount of masks is not made at one time, the cost will increase, so it is convenient to be able to apply a one-time mask to a certain degree of unusual specifications. By the way, if you have free space in the program memory section (ROM) of a one-chip CPU, you can also write a program with a different specification in that area, use the external input/output terminal to create a different specification, and use it in common with the previous program. If there is a part that can be used, it can be used effectively, and the program memory section (ROM) can be used effectively, and it should also be suitable for multi-machine, low-volume production. The object of the present invention is to provide an input/output control device that can execute other specifications by controlling the input/output of a data imprinting device using a single-chip CPU having a clock function as described above. It is about providing. To achieve the above object, the input/output control device according to the present invention includes a light emitting diode display device, a liquid crystal display device, a first operation mode for selecting one of DATE mode, MEMO mode and interval mode, and a camera film. month, day, hour,
It has an output port and an input/output port, and outputs a control signal for controlling the liquid crystal display device from the output port, and outputs a control signal for controlling the liquid crystal display device from the output port. Excluding a control device that outputs a digit drive signal to a light emitting diode display device and outputs a BCD signal to an input/output port terminal when the input port is in output mode, and one input/output port terminal of the input/output port terminals. When connected to all remaining input/output port terminals, and when the input/output port is not an output port, all remaining input/output port terminals except for the one above are set to the specified level, and when in output mode, the input/output port is connected to the specified level. BCD output from
Level regulating means that does not affect the signal, and selecting the operating mode by connecting either the 1 level or the 0 level to the removed one input/output port terminal via a resistor. an operation mode selection means, connected to an input/output port terminal of the control device, for causing the light emitting diode display device to display a display according to a signal on the input/output port terminal, and all remaining input/output ports except the one; a decoder that blanks the light emitting diode display device without displaying any information when the terminal is at the predetermined level; When a level 0 is connected, the first operation mode is selected, and when a level 0 is connected, the second operation mode is selected and the corresponding program is executed. The data imprinting device according to the present invention will be described in more detail below with reference to the drawings and the like. FIG. 1 is a circuit diagram showing an embodiment of the data imprinting device according to the present invention, and FIG. 2 is a flowchart for explaining the operation. Specification 1 (first operation mode) that allows this embodiment device to perform substantially the same function as the device related to the applicant's earlier application mentioned above.
operation and other specifications 2 (second operation mode)
This is something that can be carried out. This specification 1
The switching operations of Specification 2 and 2 are realized by the input/output control circuit configuration of the device according to the present invention. Here, specification 1 operates in three types of data back mode, DATE mode, MEMO mode, and interval mode suitable for normal camera construction, and specification 2 has a clock function suitable for specifications as a surveillance camera, etc. to record the month, day, hour, and minute in two digits each onto the camera film. Set the switch to specification 1 and set the time in DATE mode.
(Year, Month, Day, Hour, Minute, Second) and set the switch to specification 2 to display the LCD display.
Both LED displays can be switched to display the month, day, hour, and minute. In Specification 1, either the year, month, day, hour, minute, or second can be selected by key input, but parts of each cannot be mixed (in this case, month, day, hour, and minute) and displayed at the same time. By increasing the number of KEY boards, it is not impossible to display them simultaneously, but this is the limit in terms of space because we were thinking of using them as data bags first. The functions of each mode in Specification 1 are left intact, and the same usage as in Specification 2 is achieved using the same single-chip CPU. In this case, it is very convenient because most of the specifications 1 and 2 are used as common parts in the program, and these two specifications can be masked once without having to intentionally mask them twice. In Figure 1, CPU 1 is a one-chip CPU with a built-in masked ROM program memory.
It has functions such as temporary storage of input data, comparison and judgment of data, and input/output control. In this example
I am using S4. IC2 is an LED driving IC that receives an "H" signal from the output terminal of the one-chip CPU1, outputs an "L" signal to the LED display element 5 whose cathode is common, and drives each digit of the LED display element 5. IC3 transmits the BCD output signal output from the input/output terminal of the one-chip CPU1 to the LED display element 5.
This is a decoder IC for converting into 7 segments, and its output is added to each digit segment of LED5. The display device 4 is a liquid crystal display device (8 digits) for external display, and has four digits for each digit and two common back plates connected to the one-chip CPU 1. Display element 5 is an LED for data imprinting
When the display element (8 digits) receives an imprint input signal from the external imprint detection photo sensor of 7,
The lights are lit sequentially starting from the lower digit using a multiplex method.
The keyboard row 6 is a keyboard row for controlling the display and lighting contents of the liquid crystal display device 4 and the LED display element 5. The chemical sensor 7 is a chemical sensor for detecting imprint input from the outside in a data imprinting device. Terminal 8 is a release output terminal that can be taken out as a release output to the outside.
When the mode changeover switch 10 is set to interval mode, a release output signal is output at specified time intervals. The switch 9 is an operation mode selection means for switching between specification 1 and specification 2. The common terminal of the switch 9 is connected to the DIO ₁ terminal, the first switching terminal is connected to the H level side via a resistor 13, and the second switching terminal is connected to the ground side via a resistor 14. Switch 10 is specified in specification 1.
This is a switch for switching between three modes: DATE mode, MEMO mode, and interval mode. The changeover switch 11 is a changeover switch for changing the lighting time of the LED display element 5 in accordance with the sensitivity of the film to be photographed. A resistor group 12 consisting of resistors 12a, 12b and 12c is a level regulating means for the input/output port, and one end of the resistors 12a, 12b and 12c is connected to DIO ₂ ~
Each is connected to the input/output port terminal of DIO ₄ ,
The other end of each resistor is connected to the H level side. When the input/output port is in a mode other than output mode, DIO ₂ ~
H level is input to DIO ₄ , but it is output from input/output ports DIO ₁ to DIO ₄ in output mode.
It does not affect the BCD output signal. Also,
The input/output port DIO ₁ terminal is H when the operation mode selection means 9 is connected to the first switching terminal side.
When the level is connected to the second switching terminal side, the L level is input, and in other than the output mode of the input/output port, the above H or L level is applied to the input/output port DIO ₁ terminal, but in the output mode does not affect the signal output from the input/output port DIO ₁ terminal as described above. In the case of specification 1, the data displayed on LED 5 will be a two-digit display for the year, month, and day and a two-digit display for the hour, minute, and second in the date mode, and these two display contents cannot be displayed at the same time. . Moreover, it is impossible to display different display contents unless there is sufficient input/output terminals on the one-chip CPU 1 or the number of keys on the KEY board is increased. Here, the one-chip CPU1, which is the control device, is
I am using SM-4, and its 4-bit terminal
DIO ₁ to DIO ₄ are used as input ports and output ports. If the decoder 3 is of the logic shown in Attachment 1, and the switch 9 is set to the specification 1 side (connected to the first switching contact side), the input/output port terminals of DIO ₁ to _{DIO 4} are connected to the resistor group 12 and the resistor. Since it is connected to the "H" level side via 13, when the output of DIO ₁ to _{DIO 4} is changed on the program, the changed output is input to the decoder 3 and lights up the LED 5, but in other states In this case, all the inputs of the decoder 3 are at "H" level, so the LED 5 is not lit. As mentioned above, when the input/output port terminals of DIO ₁ to _{DIO 4} are outputting variable outputs, the input/output port is in the output mode. Next, as specification 2, the month, 8-digit LED and liquid crystal,
Consider a case where you want to display the day, hour, and minute with two digits each, and also perform a clock operation. When the switch 9 is set to the specification 2 side (connected to the second switching contact side), the input/output port terminal of DIO ₁ is connected to the "L" level side via the resistor 14 as described above. Therefore, if the output of DIO ₁ to _{DIO 4} is changed on the program as in the case of specification 1, the decoder will be decoded according to the changed data.
LED lighting operation is possible (input/output port is in output mode) and DIO ₁ to _{DIO 4} in input mode
Read the input data to the program
It is possible to judge the "L" level of the input/output port terminal of DIO ₁ and jump to the operation routine of specification 2, and display the month, day, hour, and minute on the LED and liquid crystal. In this case, since only DIO ₁ terminal is set to “L” level among DIO _{1 to 4} terminals, decoder 3
The BCD input becomes "1110" and the decoder output becomes all 0, so the display is blank and the LED will not light up at the wrong position in the program. As long as you use a decoder like Table 1,
If it is in the range of the lower 2 bits, insert the judgment in the program as in the example above, write a program with the specified function to the program memory section (ROM), and insert the judgment of this port in the main program. It can also be used as another functional element.
The flow of this operation is shown in FIG. In the flowchart, specification 1 and specification 2 are determined depending on whether DIO ₁ is “H” or “L” and the respective operations are performed. After clock counting, it is determined whether DIO ₁ is “L” and if it is “L”, the mode operates according to specification 2, and if there is a release signal (LED lighting control 2), the LED is lit (in this case month, day, hour, minute
Imprinting onto the film using the LED), and then (liquid crystal display control 2) the liquid crystal display is controlled. If there is no release signal, the LED will not be lit and the process will proceed directly to (liquid crystal display control 2) where liquid crystal display control will be performed. If DIO ₁ is not “L”, it will operate in the mode of specification 1, and the following BATTERY CHECK judgment,
DATE mode judgment, MEMO mode judgment, etc. specifications 1
performs the specified operation.

【table】

【table】 [Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a data display device using an input/output control device according to the present invention, and FIG. 2 is a flowchart for explaining the operation of the device. 1: Control device, 2: LED drive IC, 3: Decoder, 4: Liquid crystal display device, 5: LED display device,
6: Keyboard, 7: Optical sensor, 8: Release output terminal, 9: Specification changeover switch, 10: Switch, 11: Sensitivity changeover switch.

Claims (1)

[Claims] 1 A light-emitting diode display device, a liquid crystal display device, a first operating mode for selecting one of DATE mode, MEMO mode, and interval mode, and a first operating mode for imprinting the month, day, hour, and minute on the camera film. It has a program for executing each of the two operation modes, and has an output port and an input/output port, and outputs a control signal to control the liquid crystal display device from the output port and also drives a digit to the light emitting diode display device. A control device that outputs a signal and outputs a BCD signal to the input/output port terminal when the input/output port is in output mode, and all the remaining input/output terminals except for one input/output port terminal among the input/output port terminals. When the input/output port is not in the output mode, all the remaining input/output port terminals except for the one above are set to a predetermined level, and when the input/output port is in the output mode, the BCD signal output from the input/output port is level regulation means that do not affect the
an operation mode selection means for selecting an operation mode by connecting either a 1 level or a 0 level to the removed one input/output port terminal via a resistor; and an input/output port of the control device. terminal, and causes the light emitting diode display device to display according to a signal on the input/output port terminal, and when all the remaining input/output port terminals except for the one are at the predetermined level, the light emitting diode a decoder that blanks the diode display device without displaying any information, and when a level 1 is connected to the removed one input/output port terminal by the operation mode selection means, the first operation mode is set; An input/output control device characterized in that when a level 0 is connected, a second operation mode is selected and a corresponding program is executed.