JPS60217439A - Device with keyboard - Google Patents

Abstract

PURPOSE:To attain quickly a prescribed program by stopping key scanning when a program not requiring key input to reduce the interruption processing time executed at each prescribed interval. CONSTITUTION:When an interruption signal at each prescribed interval is outputted when a program stored in a program memory 36 of a device 1 with a keyboard is executed, a CPU43 discriminates the on/off stage of a key scan control flag 41. When the flag is in off-state, that is, the program requiring the key input is executed from a keyboard, the CPU43 outputs a scanning signal to a key matrix circuit 30 so as to apply key scan interruption processing for the detection of depressing state of a key switch 31. When the decision indicates that the flag 41 is in on-state, that is, when the save or load program not requiring the key input is executed, the CPU43 stops the key scan of the keyboard section to apply interruption processing to other various operations.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a device with a keyboard section that executes a predetermined operation in response to the code of a key switch that is pressed.

(b) Prior Art Conventionally, in devices with a keyboard that execute predetermined operations according to various programs stored in a program memory, the execution of the program is temporarily interrupted at regular intervals, and at the time of the interruption, the keyboard Interrupt processing was performed for various operations such as key scanning to search for the pressed states of various keys arranged in the section. After the above interrupt processing is completed, the above program is executed again.

(c) Problems to be Solved by the Invention However, an example of a method that does not require manual input of keys from the keyboard section is to store takes stored in memory in an external memory ['save program for storing them in a device or in an external storage device]. Even when executing a program such as a program for transferring recorded data to memory, the interrupt processing 11
? Since the keyboard 81 (keyboard 81) is key scanned, there is a problem in that the execution time of the main interrupt processing becomes long.

As a result, there was a problem in that the Yabu program or roto program described above could not be executed quickly. fil
In the key scan of the key chain, a scanning signal is sequentially applied to each column line and a key matrix circuit is arranged in a matrix with many column lines and row lines.
Since the pressed state of a key is detected by searching 1118 times for each row line 15 times the column line where 's' is output, the key scan requires more time than other interrupt processing. As a result, the interrupt processing time, which occurs at regular intervals during program execution, becomes long.

(d) Means for Solving the Problems In view of the above-mentioned drawbacks of the conventional art, the object of the present invention is to have a simple configuration that allows for constant key scanning when executing a program that does not require key human power. To provide a device with a keyboard capable of shortening interrupt processing time executed at each interval and quickly executing a predetermined program.

For this reason, the present invention interrupts the execution of programs 1 and 6 written in the program memory at regular intervals and scans the keys of the keyboard section 71.
In a device with a keyboard that detects key presses on the keyboard, a flutter for ill for Ifjj B self key scan is provided in the memory, and the +riI key is A device with a keyboard is constituted by a control OD means for controlling ski scanning.

(c) Effect of the Invention According to the present invention, when executing a program that requires manual input of keys from the keyboard section, the control means temporarily interrupts the execution of the program at regular intervals and temporarily interrupts the execution of the program. Sometimes, depending on the setting state of the key scan control flag set based on the 111th program, the key scan to detect the press of a key is processed including B'j, and the key human power from the keyboard section is required. When executing a program that does not execute the program, the control means temporarily suspends the execution of the program and suspends the key scan during interrupt processing according to the setting state of a key scan control flag set based on the program,
This shortens interrupt processing time.

(f) Effects of the Invention As a result, the present invention has an easy configuration, and when executing a program that does not require key human power, the interrupt processing time to be executed at a constant/111 interval can be reduced by canceling the kill scan. It is a keyboard-based device that can be shortened and quickly execute a fixed program.

(g) From row 'J' onwards, the present invention is to thermally print the print data inputted manually from the keyboard section onto thermal paper, and record the print data inputted manually using the keys in the built-in text memory.
: A thermal function that allows printing data stored in the text memory to be stored in the external storage t0 device and printing data stored in the external storage +B device in the text memory when the line is connected to an external storage device. A description will be given of an embodiment in which a printing type electronic typewriter is subjected to nz processing.

In FIG. 1, which shows the structure of an electronic typewriter, the electronic typewriter 1 is composed of a keyboard portion 2 and a print 4i14143. The keyboard section 2 has a large number of character keys 4, a mode selector switch 5, and a coat key 6.
, a print start key 7, and other various key switches are arranged. The mode changeover switch 5 is used to switch the electronic typewriter 1 between a direct printing mode and a text creation mode. In addition, the code key 6 is the same as the appropriate character key 4.
When the key 111 is pressed, a code signal for operating the electronic typewriter 1 in a predetermined manner is manually input. Furthermore, when the print start key 7 is pressed during the text creation mode, print data written in tf+ in a text memory 42, which will be described later, is printed. The keyboard section 2
A display device 8 consisting of an LCD is attached to the. This display device 8 has fewer display digits than the print data for one print line≧9, and displays characters and function data corresponding to the print data inputted by keystrokes, symbols, etc.

A flat platen 21 is attached to a frame 20 of the printing mechanism 3. This platen 21 supports thermal paper 22 that is inserted as a paper feed roller (all not shown) rotates and is driven and connected to a paper feed motor. 1riJ frame 20 has a platen 21
Carriage kite parallel to l1ll! I23 is installed. A carriage 24 is supported on this carriage guide shaft 23 so as to be movable back and forth. The carriage 24 is drivingly connected to a carriage feed motor (not shown) via a drive wire 25, and reciprocates on the carriage kite shaft 23 as the carriage feed motor rotates. Thermal head 26 is installed in the carriage 24 described in No. 111.
A large number of heating elements (not shown) are arranged in the thermal head 26 in a direction perpendicular to the printing lines of the thermal paper 22. The thermal printer 26 selectively causes a heating element to generate heat based on data to be described later, and thermally prints print data on the thermal paper 22. A power switch 28 is attached to the side surface of the case 27 of the printing mechanism 3. This electronic typewriter 1 has a built-in battery inside the case 27.
It is powered by a battery (not shown). Further, a connector section 29 is attached to the side surface of the case 27, and an external storage device (not shown) is connected to this connector section 29.

Incidentally, the carriage 24 described in 01j is urged to rotate about the carriage kite shaft 23 at n' by the spring force of a tension spring (not shown) toward the head release side where the thermal paper 22 and the thermal head 26 are separated. and carriage 2
4 is a thermal paper 22 and a thermal head 26 centered around a carriage kite shaft 23 against the spring force of OXJ by a built-in electromagnetic solenoid (not shown) during printing operation.
When the plunger is rotated to the pressure contact side and the electromagnetic solenoid is in a non-energized state, the plunger becomes a permanent magnet.
101 (both not shown), this head press-contact state is maintained by magnetic attraction.

In FIG. 2 showing the electronic configuration of the electronic typewriter 1, a key matrix circuit 30 is formed in the keyboard portion 2. As shown in FIG. In this key matrix circuit 30, a large number of column lines and row lines are arranged in a matrix, and key switches 31 are arranged in parallel at the intersections of each column line and row line.

When the key switch 31 is pressed, the corresponding column line and row line are closed. Further, a column decoder 32 is connected to each column line +tjJ, and the tally decoder 32 sequentially outputs a scanning signal to the column line according to the count value of a column counter (none of which is shown) in the counter circuit. Furthermore, each recording row line multiplexer 33 (lj+) is connected, and this multiplexer 33 searches for a selected row line according to the count value of a row counter (not shown) of the counter circuit. The multiplexer 33 detects the depressed state of the key switch when a scanning signal appears on the row line corresponding to the column line to which the scanning signal is input.

The ROM 34 has a pattern memory 35 and a program memory 36. And this pattern memory 35
Pattern data corresponding to each print data is written in . In addition, the program memory 36 includes, for example, a save program for storing revised print data in a text memory 42 (to be described later) in the external storage device 37, and transfers print data stored in the external storage device 37 to a text memory 421\. Various program data such as roadblocks and the like are stored. Rewritable R
AM38 has 39 manual buffers and 40 print buffers.
, key scan control flak 41 and text memory 4
It has 2. The bending input buffer 39 has memory locations corresponding to the number of print data for one print line, and has memory locations corresponding to the number of print data for one print line.
Stores the print data manually input from the key. Also, like the manual buffer 39, the print buffer 4° has storage locations corresponding to the number of print data for one print line, and stores print data transferred from the manual buffer 39 or the text memory 42 during printing operations. The key scan control flag 41 is turned on based on the save program or load block accessed from the program memory 36. This will cause the key scan for the key fob ft1l 2 to be canceled and for this key scan 1li
The U control flag 41 is turned off based on a program other than the above save program and load program to enable key scanning of the keyboard section 2. The text memory 42 is stored in the keyboard section 2 during text creation mode.
It stores the print data entered manually from the keypad and the print data transferred from the external storage tM device 37 during load mode.

The central processing unit (hereinafter referred to as CPU) 43 accesses programs corresponding to various codes from the program memory 36 by pressing the mode 9 switch 5 or the code key 6 in combination with the appropriate character key 4. , according to this program key scan Itr control flux 4
After setting 1 to ON or OFF, a predetermined operation is performed according to the 2nd program.

Further, the CPU 43 temporarily interrupts the execution of this program by interrupt No. 48 that is input at regular intervals, and at the same time outputs a scanning signal to the key matrix circuit 30' to indicate the pressed state of the key switch 31. Various operations such as key scan, timer control operation, and buzzer ringing for detecting are processed by interrupt processing. Further, the CPU 43 drives a carriage drive circuit 45, a head drive circuit 46, a solenoid drive circuit 47, and a paper feed drive circuit 48, respectively, based on the print data entered manually from the keyboard section 2 or the print data stored in the text memory 42. The print data is thermally printed by controlling.

Next, the normal print mode and text creation mode will be explained according to FIGS. 3A and 3B showing the execution state of the program and interrupt processing.

When the mode ψ switch 5 is switched to the normal printing mode, the CPUj3 accesses the normal printing program from the program memory 36 using the code data corresponding to the normal printing mode, and turns off the key scan control flag 41 according to this program. Then, the CPU 43 executes this program as shown in FIGS. 3(A) and 3(B), temporarily suspends the execution of the program by interrupt signals input at regular intervals, and then presses the key. Based on the OFF state of the scan control flag 41, various operations such as key scanning of the keyboard section 2 are processed by interrupt processing.Then, after the above-mentioned interrupt processing is completed, the CPU 43 causes the above-mentioned program to be executed again.In this state fg, the character key 4
When the print data is input from 2, the CPU 43 stores this print data in the input buffer 39 and also prints this print data.
The data is transferred to the buffer 40. Then, the CPU 43 accesses the pattern data from the pattern memory 35 using the print data transferred from the print buffer 40', and drives the carriage drive circuit 45, head drive circuit 46, solenoid drive circuit 47, and paper feed drive circuit 48, respectively. By controlling the key, the printed data is transferred to thermal paper 2.
2. Print thermally. Further, the CPU 43 outputs the pattern data accessed from the pattern memory 35 based on the print data stored in the manual buffer 39 to the display device 8 to display the print data.

When the mode changeover switch 5 is switched to the text creation mode, the CPU 43 accesses the text creation program from the program memory 36 using the code data stuttered to the text creation mode, and sets the key scan control flag 41 according to this program. Set off. And C.P.
U43 executes this program in the same manner as described above, temporarily interrupts the execution of the program by an interrupt signal input at regular intervals, and then turns on the keypad based on the OFF state of the key scan control flag 41. Do part 2
Interrupts various operations such as key scanning. After the interrupt processing is completed, the CPU 43 executes the program again. In this state, when print data is entered manually from the keyboard section 2, the CPU 43 stores this print data in the manual buffer 39 and text memory 42.

Further, the CPU 43 outputs the pattern data accessed from the pattern memory 35 based on the print data stored in the manual buffer 39 to the display device 8, and displays the print data that has been keyed. Then, in order to print the print data stored in the text memory 42 by the above operation,
When the print start key 7 is pressed, the CPU 43 transfers one print line worth of print data from the text memory 42 to the print buffer 40 11i#. Then, the CPU 43 accesses the pattern data from the pattern memory 35 based on the transferred print data, and similarly to the above-described printing operation, the CPU 43 uses the carriage drive circuit 45, head drive circuit 46, thread node drive circuit 47, and paper feed drive circuit 48. The print data is thermally printed by controlling the drive of each of the two.

A safe mode in which the print data stored in the text memory 42 is stored in the external storage value ff37 and the print data stored in the external storage device 37 is stored in the text memory 42.
This section explains the load mode for transferring files to .

Figure 4 (A) shows the actual state of the save program or load block and the execution state of interrupt processing.
In E), when the code key 6 and the character key 4 for the character "S (Save)" are pressed at the same time in the text creation mode, and a save command is entered from the keyboard section 2, the CPU 43 executes this save command. Based on this, the save program is accessed from the program memory 36, and the key scan control flag 40 is set on according to this save program. Further, after the CPU 43 changes the electronic typewriter 1 and the external storage device 37 to the online II1 enabled state using this save block,
The print data stored in the text memory 42 is sent to the external storage device 37 1a to execute the save program. When an interrupt signal is input at regular intervals during the execution of this save program, the CPU 43 temporarily interrupts the execution of this save program, and at the same time causes various operations to be processed by interruption. At the time of the above interrupt processing, the CPU 43 executes the mI key scan control flag 4.
Based on the ON state of the key matrix circuit 3, the output of the scanning signal to the key matrix circuit 3° is prohibited to stop the key scan. After interrupt processing various operations other than key scanning, such as a timer control operation for counting the waiting time with the external storage device 37 and a buzzer sound, the CPU 43
executes the save program by transmitting the print data stored in the text memory 42 to the external storage device 37 again.

Also, when in text creation mode, code key 6 and the character "'
When the character keys 4 for L (Load)' are pressed at the same time and a load command is issued from the keyboard section 2, the CPU 43 reads the load block from the program memory 36 based on this load command in the same way as the operation described in 647. After accessing, the key scan control flag 41 is set on according to this load program. Also,
The CPU 43 switches the electronic typewriter 1 and the external storage device 37 to an online enabled state using this rotary program, and then executes the load block program by transferring the print data stored in the external storage device 37 to the text memory 42. . When an interrupt signal is input at regular intervals during the execution of this rotor program, the CPU 43 temporarily interrupts the execution of the load block program, and at the same time causes various operations to be processed by interruption. During the interrupt processing, the CPU 43 controls the key matrix circuit 30 based on the ON state of the key scan control flag 41.
The key scan is stopped by prohibiting the output of the scanning signal to the key. After interrupt processing various operations other than the key scan, the CPU 43 again transfers the print data stored in the external storage device 37 to the text memory 42 to execute the road program.

First, the interrupt processing state will be explained according to FIG.

When an interrupt signal is output at regular intervals during execution of the program stored in the program memory 36, the CPU 4
3, the block 50 determines whether the key scan control flag 41 is turned on. If this determination is NO, that is, if a program that requires key input from the keyboard section 2 is being executed, the CPU 43 will block the block 5.
1 outputs a scanning signal to the key matrix circuit 30 based on the OFF state of the key scan control flag 41, and interrupts a key scan for detecting the pressed state of a key switch. After the above operation, the CPU 43 interrupts various operations such as timer control operation and buzzer sounding in block 52, and then ends the process. On the other hand, if the determination in the block 50 is YES, that is, if a safe program or a load program that does not require manual key input from the keyboard unit 2 is being executed, the CPU 43 operates the keyboard based on the ON state of the key scan control flag 41. Abort the key scan of part 2 and move to block 52.
Interrupts other operations and ends.

Therefore, this embodiment shortens the interrupt processing time that is executed at one step interval by canceling the key scan when executing the seat block or road block that does not require manual input from the keyboard section 2. However, the above-mentioned Seitz program or Roto program can be quickly executed.

[Simplified explanation of drawings by 11 people] Figure 1 is a perspective view of an electronic typewriter, Figure 2 is an electronic block diagram of the electronic typewriter, and Figure 3 (A).
An explanatory diagram showing the execution state of a program that requires key human power, CB) is an explanatory diagram showing the interrupt processing state, FIG.
) is an explanatory diagram showing the execution state of a safe program or road block that does not require key human power, CB) is an explanatory diagram showing the execution state of interrupt processing, and FIG. 5 is a flowchart showing the interrupt processing state.

In the figure, 1 is an electronic typewriter as a device with a keyboard, 2 is a keyboard section, 36 is a program memory, 38 is a RAM as a memory, and jl is a key scan iti'j
There are 4 wholesalers and 43 are CPUs.

Patent applicant: Brother Industries, Ltd. Agent Patent Attorney IP Fuji Ken

Claims (1)

[Claims] 1. During the execution of a program stored in the program memory, the execution of the program is interrupted at regular intervals and the keys of the keyboard are scanned to detect the pressed state of the keys of the keyboard. In a device with a keyboard that is configured to perform
A device with a keyboard, characterized in that it is provided with a control means for controlling a self-recorded key scan to be canceled depending on the state of a self-recorded control flag.