JPS60101561A - Operation and display device - Google Patents

Abstract

PURPOSE:To reduce the wiring to an operation and display device by providing a microprocessor for the operation and display device, and transmitting data to the processor of an equipment body in series when data from the equipment body is transmitted. CONSTITUTION:The microprocessor 4 for a switch element 2 and a display element 3 which constitute the operation and display device is provided, and this processor 4 and the microprocessor 4 of the equipment body such as a copying machine are connected mutually by a wiring cable 5. Data is transmitted between the microprocessors 1 and 4 in series, and this transmission is carried out only when data is transmitted from the equipment body. This constitution reduces the wiring from the microprocessor of the equipment body to the operation and display device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operation/display device having an operation switch and a display element in electronic equipment, and particularly to a data communication system with these devices.

[Prior art]

In electronic equipment equipped with this unique operating/display device, the operating switches and display elements are provided at predetermined locations on the equipment. For example, taking a copying machine as an example, a copying machine has a copy start switch, a number of copies setting switch, various selection switches, and other operation switches (= related to the state of the copying machine). Displays 1' and 14 informing the operator, for example, are easy to use for the operator (2). Light-emitting elements such as LEDs and lamps are powered by the microprocessor of the copying machine body] 1.
I am in control.

For this reason, the number of switches and the number of light-emitting elements described above (depending on the number of cables installed inside the machine (= many wiring cables), for example, between the microprocessor and the operation/display device (2). In some cases, the number of wiring cables required can reach nearly 100, and the cost involved is high, and there are many disadvantages in terms of space due to the mechanical design.

[Purpose of the invention]

This invention was made in view of the above points (;
The purpose is to reduce the number of wiring connections to the display device, reduce costs, and at the same time make effective use of space within the device.

[Structure of the invention]

In order to achieve the above object, the present invention provides a microprocessor for an operation/display device separately from the microprocessor in the main body of the device, and transmits input/output data to and from the microprocessor in the main body of the device by serial transmission. At the same time, in order to avoid requiring major changes to the software of the main body of the device, data is transmitted from the operation/display device only when data is transmitted from the main body of the device.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the basic structure of this prompting.
) are switch elements and display elements that constitute the operation/display device, and the operation/display device is equipped with a microprocessor (4) dedicated to the operation/display device, separate from the microprocessor (1) in the copying machine main body. At the same time, a wiring cable (5) is installed between the microprocessor (1) of the copying machine main body and the microprocessor (1) of the copying machine main body.
1) Data transmission of input/output data is performed by asynchronous serial transmission, and data is transmitted from the operation/display device only when data is transmitted from the copying machine itself. There is.

FIG. 2 shows an example of this. (6) is a communication LSI such as Intel's 8251A, (7), (
7) is a driver/receiver on the side of the microprocessor (1) of each copying machine main body and the microprocessor (4) of the operation/display device, and the wiring group (5) between the above-mentioned copying machine main body and the operation/display device. is the display data signal line (
51), switch data signal line (52), data group identification signal line (53), and data retransmission request signal line (54).
Consists of seed signal wires. The above display data signal line (5
1) is a signal line for transmitting display data to the operation/display device side, and a data group identification signal line (53) indicates that the display data to be transmitted is data that serves as a reference for a series of display data groups, e.g. This is a signal line that is used to send a data group identification signal when it is the first data or the last data. The switch data signal line (52) is a signal line for transmitting switch data from the operation/display device side, and the data retransmission request signal line (54) is used to detect the error in switch data transmission. This is a signal line for sending a data retransmission request signal to the operation/display device side in order to request retransmission at a certain time.

Next, in the above configuration (2), input/output data is serially transmitted to and from the microprocessor (1) of the copying machine main body,
Furthermore, regarding the operation in which data transmission from the operation/display device is performed only when data transmission from the copying machine main body side is performed, timing charts related to display data and switch data (1) are shown in Figures 1-8. Communication on the machine body and the operation/display device side will be explained with reference to FIGS. 4 and 5 showing solo charts of processing related to communication (1).

First, the copying machine main body performs the following operations at a predetermined time.

That is, display data is transmitted via the display data signal line (51), but it is determined whether the display data to be transmitted this time is the reference of the data group, and if the determination result is No, the data group identification is performed. No signal is sent, and the display data to be transmitted is the reference data for a series of display data groups, such as the first data or the last data, and the above judgment result is YE.
In the case of S, a data group identification signal is sent. Next, it is determined whether the switch data is received or not, and the result of 1 determination is Y.
In the case of ES, it is further determined whether the switch data is error-free and valid. If there is switch data being received and it is valid switch data and the above judgment result is YES < 7), the data retransmission request signal is not sent and the received switch data is stored in the memory. However, as a result of checking the second error in transmission, if there is an error and the determination result is No, a data retransmission request signal is sent to the operation/display device side to request retransmission.

Next, the operation/display device performs processing such as checking the status of the switches and displaying information, but when it completes receiving the display data from the copier main unit as described above, it performs the next operation using interrupt processing. .

That is, when the reception of display data is completed, it is determined whether the interval since the previous reception is within a specified time and whether or not there is an error in the received data. and,
If so (2), check the error in the transmission of the received display data and the elapsed time since the previous reception, and if there is an error (2), perform the following operations and terminate the process. In either case, if the interval is not within the specified time and the determination result is No, or if the interval is within the specified time but there is an error in the received data and the determination result is YES (- also).

Regardless of the presence or absence of a data retransmission request signal, if the retransmission data is not sent as invalid, and all display data groups including the received display data are invalidated, and there is switch data to be transmitted (= indicates that I will send it next time (I will do it once) and will not send it.

Then, if the above interval is within the specified time and there is no error in the received data, it is determined whether there is a next (=data retransmission request).Here, the determination result is YES.
In the case of S, the switch data sent last time is sent again, and the determination result is N.

In this case, it is determined whether there is any further switch data to be transmitted, and if a YES determination result is obtained, the switch data is transmitted. In this way (2. Check the data retransmission request signal, if there is a data retransmission request, send the retransmission data (switch data sent last time), and if there is no data retransmission request and there is switch data to be sent as well. Then, operate the switch data as follows.
It is transmitted from the display device side power 1 via the switch data signal line (5z).

Then, in the next step (second step, data group identification fl'J
Determine whether a signal is being sent or not, and the determination result is N
o In the case of (=, the received data is stored in the memory, and when the above judgment result is YES, the stock is added. , when a YES determination result is obtained, the series of data groups is displayed.In other words, the data group identification signal is checked, and if the data group identification signal is sent, the series of display data is displayed. If the group is valid, the display data group is processed to be displayed; if the group is invalid, the display data group is not displayed.

In this way, a microprocessor (4) dedicated to the operation/display device is provided, and a microprocessor (1) in the main body of the copying machine is provided.
Transmission of human output data between the copying machine and the copying machine is serial transmission, and data transmission from the operation/display device is performed only when data is transmitted from the copying machine main body side. Therefore, depending on the number of switch elements (2) and display elements (3) on the operation/display device side, there are many
For example, even if nearly 100 wiring cables are required, it can be reduced to 4 as described above, and the wiring cables from the microprocessor (1) of the copier main body to the operation/display device. can be significantly reduced. Therefore, this not only makes it possible to reduce costs, but also solves space problems in mechanical design, and makes it possible to effectively utilize the space inside the aircraft for such operation and display devices. can. Moreover, in order to deal with the time delay in data or control that occurs when using 7-real transmission as described above, conventional copying machine main body software requires major changes, but as mentioned above, it is possible to Data transmission is performed only when data is transmitted from the copying machine itself, so only minor changes are required, and the time required for data communication processing in the software can be shortened. .

In addition, in the embodiment 1, a communication LSI is installed on the main body side of the copying machine.
Although we have explained the case where +61 is used, there are CPUs with similar functions as some one-chip microprocessors, so if you use this, the communication LSI +6) mentioned above can be omitted. . Further, although the explanation has been given using a copying machine as an example of an electronic device, the present invention is not limited to this, but can also be applied to the operation/display device of other electronic devices such as robots or so-called mechatronic devices. .

〔Effect of the invention〕

As described above, this invention can reduce the number of wiring cables from the microprocessor of the device main body to the operation/display device, thereby reducing costs and making effective use of the space inside the aircraft. It does not require any major changes to the main body software, and has the advantage of reducing the time required for software data communication processing.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the basic configuration of this invention, Figure 2 is a block diagram of an embodiment of this invention, and Figure 3 (a).
and (b) is a timing chart of display data and switch data, FIG. 4 is a flowchart showing processing related to communication on the intangible side of the copying machine, and FIG. 5 is a flowchart showing processing related to communication on the operation/display device side. . Explanation of symbols (1): Microprocessor (
4)...Microprocessor dedicated to operation/display device (5)...Wiring cable patent applicant Fuji Xerox Co., Ltd. Figure 1 - Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In an electronic device equipped with an operation/display device, input/output data is serially transmitted to and from the device's microprocessor, and data is transmitted from the operation/display device side to the device itself. An operation/display device characterized by being provided with a microprocessor for the operation/display device that is only performed at certain times.