JPH0614330B2 - Microprocessor device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a microprocessor device used in an electronic device such as a measuring instrument having a built-in microprocessor, and in particular, to improving data input means such as constant setting and function setting. The present invention relates to a microprocessor device.

[Technical background of the invention and its problems]

In recent years, microprocessors have made remarkable progress in expanding functions, downsizing, cost reduction, etc., and along with this, the operating temperature range has been expanded and low cost has been positively impacted by small electronic devices such as measuring instruments. Microprocessors have been widely introduced. For this reason, the introduction of such a microprocessor makes it possible to make electronic devices highly accurate and multifunctional, which greatly contributes to performance improvement.

By the way, in the electronic device using the microprocessor as described above, it is necessary to set, for example, a calculation constant and a function in accordance with the contents of calculation control, application, etc. Conventionally, these settings are performed by a DIP switch (small mechanical. Switch).

The setting means using this DIP switch erases the set value due to the energization / non-energization of the power source, the program runaway, etc., and eliminates writing errors. However, if the number of setting items increases, the number of stitches increases. There is a problem that space is increased and operation mistakes are likely to occur.

Further, as another conventional setting means, there is an electronic device having a setting device for setting by key operation. Such a device inputs a set value by key operation, and a static RAM that is not erased by a battery backup even if the set input value is interrupted, or electrically writable / erasable and not erased even when it is not energized EE
It is stored in a PROM (Electro Erasable Programmable Read Only Memory) or the like.

This key operation is a large-scale operation by providing a display unit for confirming the setting result of the set value, but since the operator can perform the operation interactively, setting mistakes are less likely to occur.

However, in this case, the set value cannot be easily input by the DIP switch.

Therefore, conventionally, a DIP switch and a key operation setting device are provided in the same device, and hardware and software (microprocessor program) for DIP switch and key operation are separately prepared to respond to versatility. There is.

In the case of this device, there is an effect that it can be appropriately selected and used, but the entire device becomes large-scaled, a lot of labor is required until commercialization, and it is costly and disadvantageous in terms of maintainability. There are drawbacks.

[Object of the Invention]

The present invention has been made in view of the above circumstances, and it is possible to set predetermined data in both mechanical switch and key operation, and also it is excellent in versatility and maintainability, and can be realized at low cost. It is to provide a microprocessor device that can perform.

[Outline of Invention]

The present invention includes a main microprocessor and a slave microprocessor dedicated to key operation, and exchanges data such as set values with the main microprocessor using a nonvolatile memory that can be easily replaced by a mechanical switch, without key operation. In this case, a mechanical switch is used to set data, whereby the hardware and software of the main microprocessor can be used for both switch setting and key operation setting.

Example of Invention

An embodiment of the present invention will be described below with reference to FIG. In the figure, 10 is a main microprocessor, from which a bus line 11 is derived, to which a peripheral circuit 12 and a main memory 13 which are different depending on various functions and applications such as a measurement sensor, an input / output circuit, are connected. Has been done. The main memory 13 stores a program for arithmetic control in the main microprocessor 10, data of processing results, and the like.

Reference numeral 14 is a sub-microprocessor dedicated to operation, in which operation keys 15 for inputting constant setting, function setting data, etc.
And a display unit 16 for displaying these data and other necessary data is connected. Further, a memory 17 for storing a data setting changing program necessary for the microprocessor 14 to operate is connected to the slave microprocessor 14. A serial line connecting line such as a clock line 18, a serial interface bidirectional signal line 19, a control line 20 and a handshake line 21 is connected between the two microprocessors 10 and 14. Of these connection lines, clock line 1
8. A non-volatile memory 22 of serial interface such as Zyco Corp. × 2443 is connected to the bidirectional signal line 19 and the control line 20.

Synchronous data of serial data (instruction word and numerical data) appearing on the bidirectional line signal line 19 is superposed on the clock line 18, and the control line 20 is selected by the nonvolatile memory 22 (chip select: selected chip). That is, the memory is a line through which a signal for determining (delimiting) a command word is transmitted. The handshake line 21 is connected to the nonvolatile memory 2 by both microprocessors 10 and 14 simultaneously.
2 is a signal line for accessing and adjusting so as not to collide.

Next, the operation of the device configured as described above will be described.
Normally, the main microprocessor 10 operates according to the flow shown in FIG. First, the main microprocessor 1
0 is constant data (for example, measurement span, alarm point, time constant, unit, etc.) or function data (for example, output form, alarm) already stored in the nonvolatile memory 22 based on the program of the main memory 13 in step S1. Type, range number, etc.) is read from the non-volatile memory 22, and subsequently, the input value, state value, etc. acquired by the peripheral circuit 12 etc. are read and arithmetic processing is executed based on a predetermined program (step S2). , S3).
The parameters read out from the non-volatile memory 22 in step S1 are used as the parameters for the arithmetic processing at this time. The data obtained by the arithmetic processing as described above is output to the peripheral circuit 12 or stored and held in the main memory 13 in step S4.

On the other hand, in the sub-microprocessor 14, when a predetermined signal is input from the operation key 15 by the operation of the worker, the sub-microprocessor 14 operates according to the program stored in the memory 17, and sets the preset item data and The predetermined number and function setting data are read out and displayed on the display unit 16. Here, when the operator looks at the display contents of the display unit 16 and inputs, for example, the constant or function setting data to be changed with the operation keys 15, the slave microprocessor 14 receives the changed input data and is nonvolatile. Memory 22
Write to.

Therefore, the main microprocessor 10 reads the new setting data from the non-volatile memory 22 in the first arithmetic processing after the change data is written in the non-volatile memory 22 by the operation keys 15, and the new constants and function parameters are also read. Perform arithmetic processing on and.

Therefore, according to the above configuration, the main microprocessor 10 and the slave microprocessor 14 can execute a predetermined process based on a unique program, and the slave microprocessor 14 can also perform the non-volatile memory 22. Since the data written in 1 can be used for arithmetic processing in the main microprocessor 10, constants and functions can be easily set with the operation keys 15, and constants and the like can be easily changed. Also, both microprocessors 1
Since 0 and 14 are connected not via a bus line but via a clock line 18, a bidirectional signal line 19, a control line 20, etc., data can be read / written from either of the microprocessors 10 and 14. In addition, as shown in FIG. 3, the nonvolatile memory 22 is replaced by a parallel-in memory.
A mechanical switch 32 can be connected via an interface circuit 31 composed of a serial-out type shift register. In this case, the sub-microprocessor 14 and the like can be removed and the constants and function data can be directly set by the switch 32. Therefore, with the above configuration, the interface circuit 31, the switch 32
If the wiring for connecting is connected, the setting by the switch and the setting by the operation key can be freely and selectively used with compatibility without changing the hardware or software. This makes it possible to shorten the development process, the manufacturing process, and thus the product cost, as compared with the conventional device, and have excellent versatility and maintainability.

Further, as shown in FIG. 4, for example, the main microprocessor 10 is directly connected to the main microprocessor 10 according to the bus line 11 derived from the main microprocessor 10.
In the case where the operation keys 15 can be controlled from the above, there is a problem that if the operation keys 15 are disconnected while the main microprocessor 10 is operating, a runaway due to the mixing of noise occurs, but the structure as shown in FIG. Then, the main microprocessor 10 and the operation key 15 connect the connection lines 18 to 2
Since they are separated by 1, the above problems are eliminated, and rather it is very advantageous for downsizing the device and sharing the operation keys 15.

The present invention is not limited to the above embodiment. For example, in FIG. 1, the serial interface type nonvolatile memory 22 is used, but an 8-bit parallel interface type nonvolatile memory 22 may be used. Further, the main microprocessor 10 and the slave microprocessor 14 may be of a connector connection type so that the slave microprocessor 14 can be disconnected even while the main microprocessor 10 is operating. Further, in the operation of the main microprocessor 10, except for the read processing of the non-volatile memory 22 by the main routine, the read processing to the non-volatile memory 22 handles that the sub-microprocessor 14 has written data in the non-volatile memory 22. It is also possible to detect by the shake line 20 and read the nonvolatile memory 22 by interrupt processing. In addition, the present invention can be modified in various ways without departing from the scope of the invention.

〔The invention's effect〕

As described above in detail, according to the present invention, a main microprocessor having a first peripheral element and a first memory and a second microprocessor having a second peripheral element such as an operation unit and a display unit and a second memory. And a non-volatile memory for storing constant data, function data, etc. are connected to the connection line for interface, and the main microprocessor operates using the operation control program of the first memory. The slave microprocessor executes the control, displays the preset constant data and preset function data of the non-volatile memory on the display unit based on the data setting changing program of the second memory, and displays the display unit. The data is changed based on the constant data and function data to be changed from the operation unit and set in the non-volatile memory. Tsu Sa each can perform a predetermined operation different by using the setting data in the nonvolatile memory, also functions, constant data that varies in accordance with the application etc., can easily change the function data. Moreover, by disconnecting the secondary microprocessor or non-volatile memory from the connection line, or by connecting the kecanical switch as it is, the necessary setting data can be set quickly, and the microprocessor is excellent in versatility and maintainability. A processor device can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram showing an embodiment of the device of the present invention, FIG. 2 is a flow chart for explaining the operation of the main microprocessor shown in FIG. 1, and FIG. FIG. 4 is a diagram showing another example of the data input means in FIG. 4, and FIG. 4 is a diagram for explaining the effect of the embodiment of the device of the present invention. 10 ... Main microprocessor, 11 ... Bus line,
12 ... Peripheral circuit, 13 ... Main memory, 14 ... Slave microprocessor, 15 ... Operation key, 16 ... Display unit,
17 ... Memory, 18 ... Clock line, 19 ... Serial interface bidirectional signal line, 20 ... Control line, 2
2 ... Non-volatile memory, 31 ... Interface circuit, 32 ... Mechanical switch.

Claims (5)

[Claims] 1. A main microprocessor having a first memory for storing a first peripheral element and a calculation control program, and a second peripheral element such as an operating section and a display section and a data setting changing program. A slave microprocessor having a second memory is connected by a connection line that controls the interface, and a non-volatile memory that stores constant data and function data is connected to the connection line. Constant data and function data of the non-volatile memory are read through the connection line based on a control program, and arithmetic control is executed using these data, and the sub-microprocessor is a predetermined signal from the operation unit. Is received, the preset constant data of the non-volatile memory is set based on the data setting change program. Setting data display control means for displaying preset function data on the display unit, and changing the display data displayed on the display unit based on constant data and function data to be changed from the operation unit, And a setting data changing unit for setting in the non-volatile memory. 2. The microprocessor device according to claim 1, wherein the connection line is an interface connection line including a clock line, an interface bidirectional signal line, a control line and a handshake line. 3. The connecting line comprises a first peripheral element and a first peripheral element.
2. The microprocessor device according to claim 1, which is different from the line to which the memory is connected. 4. The connecting means for connecting the connecting line between the two microprocessors is connected by a connector so that the main microprocessor and the slave microprocessor can be separated from each other. Microprocessor device. 5. When the main microprocessor and the slave microprocessor are connected by a connector, a mechanical switch is connected instead of the non-volatile memory and the slave microprocessor or in the state of being connected. 5. The microprocessor device according to claim 4 above.