JPS61117628A - Microcomputer development supporting device - Google Patents

Abstract

PURPOSE:To make the confirmation of timing unnecessary to shorten the development time by providing a hardware designing means of a development supporting device with a circuit designing part and a logic simulation part and performing the circuit diagram design and the software development with the same device. CONSTITUTION:A rough sketch 11 is inputted to a drawing editor 12 and is displayed on a graphic display device 5 to generate a circuit diagram. At this time, components generated preliminarily by a component editor 13 are used by a master library 14 on demand. A logic simulator 17 uses the circuit diagram generated by the editor 12 and test data of timing inputted form a word generator 16 to perform the logic simulation of the operation of the circuit and obtains a timing chart. This timing chart is analyzed by an analyzer 18 to check the operation of the circuit, and the circuit diagram on the display device is changed conversationlly in case of design miss to complete the circuit diagram, and the circuit diagram, is copied fair on a plotter 6 by a drafter 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a development support device for a microcomputer application system.

(Prior art) In the development of microcomputer application systems,
First, we define the division of functions between hardware and software, design both, operate each separately to confirm that they operate according to specifications, and then combine them and conduct prototype tests. Once the correct operation is confirmed, the program is written into PROM. When errors are discovered at these stages or when specifications are changed, corrections are made at the appropriate stage.

When developing microcomputer application systems, development support equipment is used to improve development efficiency.

The development support device is equipped with an assembler, an editor, etc. in order to streamline software debugging, which takes more time than hardware development. In-circuit emulator (ICE) for
).

The development flow of a conventional microcombi computer application system is shown in chart 70 of the m8 diagram. First, a product (microcomputer application system) is planned (step Pi). Next, a system design for this product is made (step P2), and the allocation and specifications of software and hardware are determined.

From now on, we will briefly discuss software and hardware.
Each is completed separately. In software, first, a program specification is created and a 70-chart is created (Step P3), a program is created, and a development support device is used to compile and assemble (Step P4). It is checked whether it operates as expected (step P5). If the operation is normal, proceed to the next step; if not, modify the source program (step P6), and return to step P4 again. On the other hand, regarding hardware, first, a circuit is designed and a circuit diagram is created (step P7). Next, prototype the circuit,
Verify the logic and check the timing to confirm that it operates according to specifications. Next, by combining the programs and circuits tested separately in this way, a prototype test is performed using a development support device (in-circuit emulator) (Step P9), and it is checked whether the operation is normal (Step P9). PIO). If the operation is normal, proceed to the next step. If the program operation is abnormal, return to step P6 and modify the program. If the operation of the circuit is abnormal, proceed to step P11) and step P8 to modify the circuit diagram. return. .

In this way, after the prototype test is completed, the circuit board is created and
The parts are mounted and officially assembled.

On the other hand, the program is written to PROM (step P↓2).Next, FROM is mounted and the operation is tested (
Step P13), it is checked whether the operation is normal (step P14), and if it is abnormal, the circuit board is corrected (step P15), and the process returns to step P13. If it is normal, write the circuit diagram t* (Step P16), and the development ends.

(Problems to be Solved by the Invention) As microcomputer devices progress, their application systems are becoming more sophisticated and larger in scale. However, in response to this trend, the capabilities of existing development support equipment for the flow of development of microcomputer application systems (see Figure 8) are not sufficient, as the focus is on software development. In order to achieve practical development, a development support device with the following functions is required so that it can also support hardware development.

(1) Software that is effective for both software and hardware development must be available.

(2) Multi-user system allows multiple engineers to work simultaneously.

(Means for Solving the Problems) The microcomputer development support device according to the present invention includes a hardware design means for supporting the design of a circuit of a microcomputer application device, and a software development support device having a debugging function. , an operation test means for testing a combination of the above circuit and a program stored in a microcomputer, and the above hardware design means includes a tablet and a keyboard as input means, a graphic display as output means, The circuit design section interactively creates a circuit on the screen of this graphic display, and the circuit design section virtually operates the above circuit in response to the conditions entered manually from the above input means, and the logic and timing of the above circuit are determined. It consists of a logic simulator 99 leaf section for testing.

(Operation and Effects of the Invention) Circuit diagram design and software development can be performed using the same device.

This eliminates the need to create mockups and check timing on paper, which are necessary in conventional hardware development, and can shorten the development period.

(Example) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The flow of development of a microcomputer application system using the development support device according to the present invention is shown in FIG. In this flow, planning (step Pi), system design (step P2), and software design and trial production (steps P3 to 6) are performed in the same manner as in the past (see FIG. 8). In hardware design, the circuit design and the creation of a rough circuit diagram are performed using the development support device according to the present invention (step pH), and then the process is performed without making a hardware prototype (Motsuku 7γb). , the logic is verified and the timing is confirmed by performing a logic simulation using the development support device according to the present invention (step P
12) Check whether the operation of the circuit is normal or not (step P13); if not, correct the circuit diagram (step P14), and return to step P12 again. If normal,
A board is created and components are mounted (step P15).

Next, the circuit thus mounted on the board and the program are combined and their operation is tested using an in-circuit emulator (step P16). It is checked whether the operation is normal (step P17).

If the operation of the program is abnormal, the process returns to step P6, and if the circuit for which the program is to be corrected is abnormal, the circuit board is corrected and components are mounted (step P18), and the process returns to step P16 again. If there is no abnormality in the operation test, load the program into FROM and implement it (Step P19)
. Finally, the circuit diagram is printed using the development support device according to the present invention (step P20).

Next, embodiments according to the present invention will be described.

The configuration of this embodiment is shown in FIG. 3. A disk 2 is connected to a CPU 1 as a storage device. On the other hand, a console 3 and a tablet 4 are connected as input devices to CFull, and a graphic display 5, a printer 6, a PROM writer 7, and a printer 8 are connected as output devices.

In this embodiment, the following three operations can be performed.

(1) Hardware design (circuit design, circuit diagram creation, circuit diagram copying, etc.).

(2) Software prototyping (Funbail, 7th assembly,
FROM writing, etc.).

(3) Evaluation using an in-circuit emulator.

The difference between this embodiment and the conventional development support apparatus is that hardware design (1) is possible, and this point will be explained below. Ike's operations (2) and (3) are the same as those of the conventional development support device, so their explanation will be omitted below.

FIG. 1 is a path diagram for hardware design. Here, the rough sketch 11 is a circuit diagram created based on the system design. The drawing editor 12 inputs a circuit diagram interactively from the tablet 4 and console 3 and displays it on the graphic display 5. Note that commands can be manually executed using symbols. The component editor 13 registers the component in the master library 14, which is the Ronok symbol library 7 isle. Any logic symbol can be defined in the component editor 13. Using the rough sketch 11, the engineer creates a circuit diagram on the graph ink display 5 from the tablet 4 using the drawing editor 12. At this time, select component editor 1 in advance.
3 (symbol diagrams of components such as TTL) are used from the master library 14 as necessary. In addition, command 7 isle 151 here+I
The L command symbol is Y rowing editor 12
used when operating.

In addition, the word generator 16 creates input timing for an arbitrary simierator.6 The logic simierator 17 tests the circuit diagram created in 1'+17-ing editor]2 and the timing input from the 7-don generator 16. The Ronoc analyzer 18, which performs a logical simulation of the operation of the circuit using the data (stored in the timing file 22), analyzes the timing obtained by the Ronoc simulator I7. The engineer uses the word generator 16 to create test data for checking circuit operation, and then applies the wiring data of the circuit diagram to the Russian zigzag generator 17 to perform a simulation and obtain a timing chart. Then, we analyze the timing chart using Loginoku Analyze 18 and check the operation of the circuit.If there is a design error, we can interactively change the circuit diagram on the Graph Ink Display s to avoid the above fabrication. Complete the circuit diagram. Schematic ink editor 1 to support hardware development
9 consists of a drawing editor 12, a word generator 1G, a word simulator 17, and a logic analyzer 18.

Finally, the drafter 20 is used to output the circuit diagram to the plotter 6 and make a clean copy of the circuit diagram. Has a function.

Below, circuit diagram creation and logic simulation will be explained in more detail.

(A) To use the schematic editor 19 and create a circuit diagram, the following commands are used. Each command can be entered either as a command name or as a command symbol.

Note that the circuit diagram consists of components and lines. The components are TLLlK, corner (indicates the bend angle of #a), cross (point of intersection of lines), and terminator (indicates the end of an untangent line).

(a) The following commands are used to add or add components or to draw lines between components.

(1) ADD COMPONENT (command name A
DDC) Displays the currently selected TTL (specified by the TTLS command) at the coordinates of the display position specified by the arguments X and Y, in the direction indicated by the argument DIR. Command symbol (
・The input method for /) is to input a point, turn off the stylus switch, and then input a diagonal line. （・）
The display direction of the selected TLLM can be specified by the relative positions of and (1).

(2) ADD LINE (ADDL) Connect components with a line, add to a line to create a cross, or create a terminator.

The method of inputting commands and symbols is to input the same point as the ADDL command, then turn off the stylus switch,
Enter a horizontal line. The position of the command symbol (.) is the starting point of the line. The coordinates of the starting point are input as the arguments X and Y. If the position of (.) matches the coordinates of a TTL bin, the starting point becomes that bin. If the coordinates match the line, the coordinates are corrected and a cross is created on the line. If the position of (・) matches the corner, the corner changes to a cross. If the position of (・) matches the cross, the starting point becomes the cross. However, if the cross is already connected in four directions, it cannot be added. If none of the above applies, a terminator is created by correcting the eight marks. When using a TTL bin as a starting point, it may be difficult for the position of the command symbol to match the coordinates of the bin, so if it falls within a certain range, it will be considered a match. Execute the ADDL command. Then, D.C.O.
R.

Commands other than UNDO and DFIN are ignored.

(3) Specify the corner position when ITIZE CORNER (DCOR) A D D L to Dr. argument
, Y are the coordinates of the corner. When specifying a corner, (・) must not match a bin, corner, cross, or terminator. Coordinates are always corrected.

(4) [Cancel JNDO DCOR designation. You can also cancel the specification of the starting point. If the designation of the starting point is canceled, the ADDL command will not be processed at all.

(5) DIC, ITIZE FIN ISH (DFI
N) Specify the end point at AD[)L. The method of inputting command symbols is the same as for ADDL commands and the like.

The command symbol (.) specifies the ending point. The arguments X and Y are the coordinates of the end point. The processing for the end point is similar to the processing for the start point of the ADD I-command.

(6) ADD NAME (ADDN) Subtract 1ri from TTL and terminator by (-1.Command symbol) coordinates become S+2 of name 1ijf, and (1
) to find the specified component. The component search method is similar to the 5ELC command. When you enter the command symbol, a message requesting human power for your name will be displayed, and since it becomes a human power town, enter your name from the keyboard. Input ends with a return. The argument X mouth + Yn is the coordinate of the name, Xs + ny Ymin,
Xmax + Ymax are the coordinates for determining the size of the rectangle, similar to the 5ELC command. 0 Name is 10
If you want to add a bar above the name, surround it with \ (backslash) or \ (yen mark).

For example, RD is entered as \RD\. However, (\) is also 1
Count as characters.

(7) DISPLAY GR[) (DGRD)A
Displays reference points during DDC and ADDL.

(8) TTL 5ELECT (TTLS) A D
This command, which specifies the TTL during DC, can only be entered from the keyboard. When specifying TTL using a tablet, directly point to the symbol on the right side of the screen (see Figure 4), but you can simply point to the TTL name in the library name display area.The library name display area cannot be displayed all at once. So BACKWARD
and FoRW A RD keys are provided, and by pointing to these two keys, you can turn the page and see everything in the library. When selecting from the library name display area, the logical symbol is displayed in the logical symbol display area of FIG. 4 (for confirmation).

(9) CHANGE TTL (CI-IAG) Replaces the TTL at the command symbol position with the currently specified TTL 0 If both bin numbers are the same, just replace, but if the bin numbers are different, the first TT of
Lines connected to L are erased.

(b) The following commands are available to select components and lines.

(1) 5ELECT COMPONENT (SE
L(4 Select any component on the screen.

To select a certain component, the component's reference point (coordinates of the center of each component) must be located in a rectangle that is diagonal to the maximum and minimum coordinates of the command symbol in the X and Y directions. , and if there are multiple components within this rectangle, select them all. There is no limit to the number of components that can be selected. Selected components change color. fD,
L, Cross and Hooner display a circle indicating that they have been selected.

Argument xmin+Y+1l when manually inputting from keyboard
in+Xmax+Ynax are the coordinates for the above rectangle.

(2) SELECT LINE (SELL) Selects lines other than components on the screen. To select, it is sufficient that a line passes through a rectangle whose diagonals are the maximum and minimum coordinates of the command symbol in the X and Y directions. However, if the end of the line is inside the rectangle, it will not be selected. Also, all lines within the rectangle are selected. Command arguments are 5ELC
Similarly, these are coordinates for determining the size of a rectangle. The selected line changes color.

(3) SELECT ALL (SELA) Select all components and lines. The command symbol can be placed in any position. All components and lines change color.

(4) CANCEL ALL (CALL) Cancels the selection of all currently selected components and lines. The command symbol can be placed in any position, and the colors of the previously selected components and lines are restored.

(5) CANCEL 5ELECT (C8EL)
Take component and line selection? Portrait

The component and line specifications that take up the selection are the same as in 5ELC and 5ELL, respectively. The colors of the components and lines whose selection was canceled return to their original colors.

(6) MOVE Move the selected component.

Even if the line is selected, it does not move. The MOVH command symbol inputs two points.

The difference between the two points in the X and Y directions is determined, and the selected component is moved by the difference.

However, moving values are always corrected. When the MOVE is completed, the selection is canceled and the color returns to its original state.

(c) WINDOW There are the following four commands to move the center of the screen, and to enlarge and reduce it. However, expansion.

There are limits to reduction.

(1) FIT WINDOW (FWIN) Expands the area specified by the command symbol to fill the screen. Expands the screen size in the X and Y directions using the command symbol to fill the calculated screen.

(2) HALF WINDOW (HWIN)WI
Halve the size of NDOW in terms of area.

It will be displayed enlarged. The command symbol can be placed in any position.

(3) DOUBL[E WINDOW (DWIN
) Double the size of WINDOW in terms of area.

It will be displayed in a reduced size. The command symbol may be placed in any position.

(4) CENTERWINDOW (CWIN) Sets the coordinates of the center of the command symbol as the center of the screen. The arguments X and Y are the coordinates of the center of the screen.

(d) Erase the selected component and line.

DELETE (DELT) Delete the selected line, component, or line connected to the component. If the line is connected to a terminator or corner, also erase the terminator or corner.

(e) LOAD-SAVE relation: Loads and saves drawing data and command data. The drawing data is information on each component, and the command data is data on command symbols.

(1) LOAD DRAWING DA'rA(
LDAT) When you manually enter a command symbol to read drawing data from a specified file, it outputs a file name input request and waits for input. Loads the data specifying the file name into memory and displays the circuit diagram on the screen.

(2) SAVE DRAWINC, DATA (SDA
T) Output the drawing data to the specified file.

When you input a command symbol, it outputs a file name input request and waits for input. File names can be up to 14 characters long and anything longer than 14 characters will be ignored.

(3) LOAD COMMAND DATA (LC
MD) Read command data from the specified file. File specification is similar to LDAT.

(4) SAVE COMMAND DATA (SC
MD> Output command data to the specified file. The file specification is the same as "SD A i".

(f) TEACH Change and register commands and symbols.

When the 'r EA CH (T A CH) command is executed, the screen will be laid out as shown in Figure 5. Enter any symbol here from the tablet. If the symbol is already registered as a command, the color of the command name changes and the system waits for symbol input. If not registered, UNDEF I
The color of NE changes. At this time, specify the command name to be changed using the tablet or keyboard. When specifying on a tablet, point to each side of the command. If specifying using the keyboard, enter the command name. To return to the editor, point to END or enter END from the keyboard.

(B) Commands for moving from the editor to the simulator and commands for processing 11;j of the simulator will be explained.

(1) SIMULATION (SIM[J)
Migrate from editor to simulator. When entering the simulator, the input/output signal lines are first set, and then the simulation is executed.

(2) INPUT LINE'5ELECT (INP
L) Specify input signal lines during simulation.

All input signals on the circuit must be specified.

Xm1n of 1 bow, Y@in+ Xmax+
Ymax is used to specify a component in the same way as the argument of the 5ELC command. This command is valid only for terminators.

(3) OUTPUT LINE 5ELECT(O
(UTL) Specify the output signal line during simulation.

If this specification is not specified, no simulation results will be displayed.The argument Xm1n+ Ya+in+ Xmax+
Y+*ax is similar to the argument of the 5ELL command and is used to specify a line. This command is valid for lines and evenings.

(4) EXCHANGE DELAY TIME (
EXCD) Maximize the delay value from TYP to MAX at Shimini Lef 23
, change from MAX to TYP. When this command is executed, it will display whether it has changed to TYPh or MAX. Initially, all are set to TYP.

(5) EXIT Used to exit from the input/output signal designation mode, TTL select mode, and Shimini line run mode during Shimini lane.

(C) Explain how to use the simulator according to the execution procedure.

(1) Pre-processing mode When moving from the editor to the simulator, this mode V is first entered. Specify the output signal line and delay time.
In this mode, WIN[)OW-related commands and IN
PL, 0UTL, EXCD.

Ignored by commands other than EXIT. By executing the EXIT command, a transition is made to the simulation mode.

(2) Simulation mode When you enter this mode, a screen similar to the PJG diagram will appear.

In simulation mode, all manual commands are menu-driven.

(a) Creating a manual waveform A manual waveform is created before executing the simulation. If the manual waveform data is already on the disk, point to LOAD on the menu, and then you will be prompted to enter the file name, so enter the file name. Read data from file and display waveform. If there is no waveform data, point to RLJLER in the menu and a scale input request will appear, so input the scale by pointing to the number and lll5l μS or ns. When you specify the scale, a waveform input request will appear for each input signal line, so use Tablet to input the INPUT as shown in Figure 7.
An input waveform can be created by pointing FIELD to the time when it becomes 1 (iHh) and the time when it becomes Lo+u.

At the end of input, point to menu END. If the manual waveform is a square wave with a duty of 50:5 (1), if you point to CL and OCK in the menu, a manual request for the frequency will appear, so the number 722 and MHz, kHz, Hz
Waveforms can be created by inputting . Further, for a periodic waveform, specify REPEAT in the menu after specifying one cycle in INPUT FIELD.

(b) Execution of Simulation Execution of simulation is started by pointing to RUN on the menu. Computations are performed using combinatorial logic and sequential logic on given element connection relationships and human input data, and a simulation of the operation of the logic circuit is executed.

(c) Display of output waveform When the simulation is finished, the output waveform is displayed. The waveform can be found in the menu X1. X5. X 11').

Or, by pointing to X2U, 1) Change the magnification and display. Also, if you point to S E A RCH on the menu, you will be asked to input a pattern to search for each (yt line), so point to any of the following five.

(I Lo-state I High state ↑ Rising ↓ Falling × Irrelevant to search If you specify all signal lines, the corresponding location will be searched from the waveform data, and the location will be moved to the center of the screen and displayed. Inside the waveform display area Pointing at any position will display a cursor at that position.If you specify two points like the MOVE command of the editor, two cursors will be displayed.
The time difference between them is displayed starting from the first point. DRAW #-point on the menu to rewrite the waveform.

To change the output signal specification, select 10DS in the menu.
Point to M to enter preprocessing mode.

(d) When you point to 5AVE on the waveform data save menu, a file name input request will be output, so input the file name.

After that, point to the signal name you need, and finally point to END on the menu. If you need all of them, E
Point only ND.

The saved waveform data can be used as other manual waveform data.
Can be used for lf history.

(e) Return to editor Return to the editor by pointing to EDIT on the menu.

COMPONENT EDITOR The component editor 13 can use the same commands as the schematic ink editor 19 to create logic symbols used in the schematic editor 19 and add them to the master library. However, A
The components of DDL commands are limited to the following six types. 1ine, circler ar(!+ Lex
L+ react+ poly.

<D> Using the DRAFT command, specifying the offset of the origin with the arguments X0FF and YOFF, and specifying the scale with the argument 5CALE, the drawing file 21 created with the schematic editor 19 is output to the plotter 6, Perform a fair copy of the circuit diagram.

The features of the embodiment described above are as follows.

(1) You can create circuit diagrams interactively using a graphic display and tablet.

(2) Easy to use because editor commands can be entered as symbols.

(3) Since it has a built-in logic simulator, you can interactively check circuit operations.

(4) Any test pattern can be generated using the word generator function.

(5) Operation checks can be performed efficiently using the Ronoc analyzer function.

(6) Circuit diagrams can be printed using a plotter.

(7) Any logic symbol can be defined.

Although the explanation has been omitted, in order to increase the efficiency of development,
Adopts a multi-user system that allows multiple engineers to work at the same time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a hardware design means according to an embodiment of the present invention. Figure 2 shows the 70th anniversary of the development of the Microcombi-comb device.
-It is a chart. FIG. 3 is a block diagram of an embodiment of the invention. The PIS4 diagram is the layout of the schematic editor screen. FIG. 5 shows the layout of the right side of the screen for the T EA CH command. FIG. 6 shows the screen layout during logic simulation. FIG. 7 is a diagram for explaining the waveform input method. FIG. 8 is a 70-chart of the development of a conventional microcomputer application device. 1...CPU, 2...Disk, 3...Console, 4...Tablet, 5...CRT,
11...U7 Squench, 12...Drawing editor, 13...Component editor, 14...Master library, 15...Command file, 1G...Word generator, 17...Lononok simulator , 18... Rononoku Analyzer, 19... Also Kematein Editor, 20... Dora 7ri.

Claims (1)

[Claims] (1) An operation test that tests a combination of a hardware design means that supports the design of the circuit of a microcomputer application device, a software development support means that has a debugging function, and the above circuit and a program stored in the microcomputer. The above hardware design means includes a tablet and a keyboard as input means, a graphic display as an output means, a circuit design section that interactively creates a circuit on the screen of this graphic display, and the above hardware design means. A microcomputer development support device comprising a logic simulation section that virtually operates the above circuit in response to conditions input from an input means and tests the logic and timing of the above circuit.