JPS60237525A - Keyboard device - Google Patents

Abstract

PURPOSE:To display a stand-by state and to prevent an error in input by detecting the stand-by state of a keyboard-side processor at a keyboard side. CONSTITUTION:A processing system body 7 is connected to the keyboard device 1 and a key signal from a key matrix 2 is scanned and detected by a processor 5 to send out key code data from a data line 6. A keying inhibition display control signal line 9, keying inhibition display circuit 10, keying inhibition display control port 11, and keying inhibition period detecting circuit 17 are added to the device. Consequently, a processor 5 scans the key matrix 2 all the time to send out key data and also enters a stand-by state until an ACK signal indicating the reception of the key code data from the main body 7 is detected. This stand-by state is detected by said detecting circuit 17 of the processor 5 to control the display circuit 10 through the port 11 and signal line 9. Then, the keying inhibition period as the stand-by state is detected and displayed.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a keyboard in which a dedicated processor is used for data processing, etc. When the processor is sending data to the main body, keystroke processing is not performed. This invention relates to a keyboard device that prevents erroneous input by displaying a message indicating that the data has not been entered.

[Background of the invention]

The first is a conventional keyboard device that uses a dedicated processor (hereinafter referred to as processor) as a keyboard control processing circuit.
The block diagram shown in FIG. 2, the timing chart shown in FIG. 2, and the flow chart shown in FIG. 3 will be explained. In FIG. 1, a keyboard device 1 is comprised of a processor 5 and a key matrix 2. The processor 5 constantly scans the key matrix 2 using the key scan line 3 and the key sense line 4, and when the keyboard operator presses a key switch on the key matrix 2, the processor 5 converts the key press into the scan. The key switch is detected and key code data corresponding to the key switch is generated. Next, the processor 5 sends the key code data to another processing system (hereinafter referred to as main body) 7 through the data line 6 (see (1) in FIGS. 2 and 5). After time T has elapsed since the transmission (see Figure 2)
, ACK (ACKknowledge) signal indicating that the key code data has been accepted.
It is sent to @line 8 (see Figure 2 (2)), but during that time (
Time T) Bromo.

Step 5 waits until the ACK signal is detected, and no other keystroke processing is performed (see FIG. 3 (2)).

Figure 3 is a flowchart that waits for an ACK signal forever after sending data, but Figure 4 shows a flowchart that waits for an ACK signal forever after sending data.
A flowchart for performing the next process when a signal is almost detected is shown.

In both flowcharts, while the processor 5 is waiting from sending the key code data to detecting the ACK signal, no other keystroke processing is performed, and there is no display means for this period. However, the keyboard operator cannot recognize that the keyboard device 1 is in a period in which no keystrokes can be performed, resulting in the keyboard operator erroneously hitting a key.

In addition, as a means of displaying this period, it is possible to process it in the main unit 7 using a processor on the main unit and display it using a light emitter, two sounding elements, etc. However, this increases the burden on the processor on the main unit and reduces the operating rate. It had its flaws.

Another method for preventing such erroneous keystrokes is to perform the next keystroke at a time interval greater than the time 1 shown in FIG. 2 before the ACK signal is output from the main body 7. However, after the keyboard device 1 inputs data, the main body 7
Even though the time T until the signal is output is not constant, the keys must be pressed at intervals close to the longest time, which has the disadvantage of slowing down the keying speed.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a keyboard device that automatically displays on the keyboard side that no keystroke processing will be performed, thereby alerting a keyboard operator.

[Summary of the invention]

In order to achieve the above object, the present invention first detects that the keyboard device has outputted key code data, and then detects that the main body has outputted an ACK signal indicating that the key code data has been accepted. It is characterized by detecting the waiting period of the keyboard-side processor and displaying it on the keyboard side using a sounding body or a light-emitting body.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 shows an embodiment of a keyboard device according to the present invention. 1 to 8 have the same functions as those described in the conventional example. Reference numerals 9, 10, 11, and 17 are the most important parts of the present invention, such as a keystroke disabled display control signal line, a keystroke disabled display circuit, a keystroke disabled display control board, and a keystroke disabled period detection circuit, respectively.

As described in the conventional example, the processor 5 constantly scans the key matrix 2 and when it detects a keystroke, sends key code data to the main body 7 through the data line 6, and detects an ACK signal from the main body 7. Wait until In this embodiment, this standby state is detected by the keystroke disabled period detection circuit 17 configured by the program of the keyboard side processor 5, and is passed through the keystroke disabled display control port of the processor 5 and the keystroke disabled display control signal line 9 to the keystroke disabled display circuit. 1
Controls 0. For example, the processor 5 is equipped with Hitachi's 8-bit single-chip microcomputer unit HI)68.
When using 05μ, it has 24 input/output ports, and it is possible to set each boat to 5R level and QV level with one command using software.

Therefore, one port among these 24 ports is assigned to the keystroke-disabled display control board 11 of the present invention, and the keystroke-disabled display control signal line 9 is connected to it. FIG. 6 shows a flowchart of the data sending section of the processor 5 of this embodiment, and will be described below. The processor 5 (1) sends the key code data to the main body 7, and then (If) sets the keystroke-disabled display control board 11, which has been previously set to the Or level, to the 5r level, and sends the keystroke-disabled display control signal line 9 to the 5r level. A signal is outputted and displayed by the keystroke disabled display circuit 10. Thereafter, the system waits until the (Ill)Acx signal is detected, and then (Ov) sets the keystroke-disabled display control board 11 to the OV level again to cancel the display of the keystroke-disabled display circuit 10.

The above number (1) (II) (ill) 1lv) is -i in Figure 6 17). In Figure 6, AC
Although the flowchart for waiting forever for the K signal has been shown, it goes without saying that the same can be achieved by modifying the flowchart described in FIG. 4 of the conventional example as shown in FIG. 7.

A specific example of the key-unable display circuit 10 for realizing this embodiment is shown in FIGS. 8 and 9. FIG. 8 shows a display method using a light emitting body, and numerals 9 and 10 have the same functions as those shown in the previous embodiment. 12 is a logic inversion circuit, 13 is an LED
(Light Ern1ttin11iioda)
, 14 indicates resistance. When the keystroke-disabled display control signal line 9 reaches the 5V level, the logic inverter circuit 12 turns off the signal (LEE).
When the cathode 13 is at the Or level, a current determined by the resistor 14 flows through the LED 15, and it emits light. FIG. 9 shows a display method using a sounding body, and numerals 9 and 10 have the same functions as those shown in the previous embodiment. 15 is a speaker, 1
6 indicates a transistor. Similar to the display method using the light emitting body, when the key press disabled display control signal line 9 reaches the 5r level, the transistor 16 is turned on between the collector and the emitter, and current flows through the speaker 15, producing sound. In the case of a keyboard device having a display circuit for another purpose, it goes without saying that these display circuits can be used in common with the keystroke disabled display circuit 10.According to this embodiment, the keyboard control processor controls the keystroke disabled period. To detect
The object of the present invention can be easily achieved by simply adding a keystroke-disabled display circuit.

Next, another example will be shown. FIG. 10 shows this embodiment, and 1 to 10.17 have the same functions as those shown in the previous embodiment. In this embodiment, the above-mentioned keystroke disabled period is detected by monitoring the data #6 and the ACK signal line 8. The operation will be explained below using figures.

As shown in FIG. 2, the keystroke disabled period is the time T from the start of key code data output to the data line 6 until the ACK signal is detected on the ACIK signal @8.

Therefore, in the present embodiment, the keystroke disabled period is such that the keystroke disabled display signal continues to be outputted to the keystroke disabled display control signal line 9 until the time when the key code data is output is detected and the ACK signal is detected on the ACK signal line 8. By providing the detection circuit 17, the object of the present invention is achieved.

Two specific examples of the keystroke disabled period detection circuit 17 for realizing this embodiment are shown below. FIG. 11 shows a specific example where the data line 6 is an 8-bit parallel data line, p, 6, 8, 9.
16 is the same function as that shown in the previous embodiment, 18 is an OR circuit, 19 is a data detection signal line, and 20 is a D-7 lip-flop.

Data line 6 is always OV when no data is output.
level. Now, when key code data is output to the data line 6, at least one of the 8-bit data lines becomes 5V level. Therefore, the data detection signal line 19 is set to the 5r level only when the OR circuit 18 outputs the key code data, and a data detection signal is output. The D-7 lip-flop 20, whose Q output has been cleared (QF level) in advance, uses the rising pulse of the data detection signal as a clock input, latches the input value of the D terminal pulled up to 5V, and outputs the Q output. becomes the 5V level, and a keystroke-disabled display signal is output to the keystroke-disabled display control signal line 9. After that, the ACK signal line 8 is sent from the main body side.
When the ACK signal at the OV level passes through the keystroke disabled period detection circuit 17, the D-7 lip-flop 20 is cleared, and the Q output becomes the OV level, and the keystroke disabled display signal is canceled.

In this example, the data line 6 is an 8-bit parallel data line, but no matter how many bits there are, the number of inputs to the OR circuit 18 can be increased or decreased to input data lines for all bits. Needless to say, the same can be achieved by

Next, a specific example will be shown in which the data line 6 is an 8-bit serial data line. Figure 12 shows Hitachi's personal computer M
This is a diagram showing the data sending procedure of the B-16000 series keyboard. Data is sent to the main body using a data line and two clock lines. All data is sent out so that the falling edge of the clock is determined by the rising edge. Prior to sending out 8-bit data, the clock is lowered once while the data line is kept at the 5R level as a start bit.

FIG. 15 shows a specific example of the keystroke disabled period detection circuit 17 in this case, where 6, 8, 9, and 17 have the same functions as those shown in the specific example, 21 is the clock line, 22 is a logic inversion circuit, 23 is a D-7 lip-flop. clock line 21
Normally, the voltage is at the 5V level, and when data transmission is started, it falls to the Or level in order to transmit the start bit, as described above. The logic inverting circuit 22 converts this falling edge into a rising edge, and the D-7 lip-flop 23, whose Q output has been cleared (OV level) in advance, receives the rising pulse of the logic inverting circuit 22 as a clock and outputs a 5V voltage. The input value of the D terminal which is pulled up to the level is latched, and the Q output is at the 5r level.A keystroke not allowed display signal is output to the keystroke not allowed display control signal line 9. Thereafter, in order to send out 8-bit data on the clock line 21#'i, the clock line 21#'i falls eight times as shown in FIG.
The data input of the -7 lip-flop 23 is fixed at the 5V level as described above, and the Q output 1j5F level t
At t, the Q output remains at the 5V level and does not change. after that,
O through the ACK signal line 8 from the main body that received the data
When the r level ACK signal passes through the keystroke disabled period detection circuit 17, the KD-7 lip-flop 23 is cleared and the Q
The output is at the OV level and the keystroke prohibition display signal is canceled.

In this specific example, the data transmission is a 2-wire type 8 with a start bit.
Although the case of bit parallel data transmission has been shown, no matter how many bits there are, 721. When there is no start bit, or even in the case of a 1-wire system with only one data line, it is possible to detect the first falling pulse of data transmission, or the logic inversion circuit 22 and the rising pulse. It goes without saying that this can be achieved.

According to this embodiment, the object of the present invention can be achieved for all data output formats without increasing the burden on the keyboard control processor at all.

〔Effect of the invention〕

As described above, according to the present invention, by detecting on the keyboard side the period during which the keyboard processor is on standby until the keyboard device outputs data and the main body outputs an ACK signal, Since the standby state of the keyboard device can be displayed using a 0 sounding body, etc., the keyboard user can reliably type keys while monitoring the processing state of the keyboard device on the keyboard side, without increasing the burden on the main body processor. can do.

Also, the keyboard device can be diagnosed based on the display state. For example, if the above-mentioned keystroke not possible display occurs continuously, there may be an abnormality in the ACK signal line 8, and if the display time is longer than usual, there may be an abnormality in the data processing on the main body side, and no display is displayed. If it does not, there is probably an abnormality in the data line. Furthermore, when a key is pressed in Hitachi's personal computers MB-6890, MB-16001, etc., a shiflic sound is output from the speaker as a confirmation sound.
If a sounding body is used for the click sound, it can also have the same function as the click sound.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional keyboard device, FIG. 2 is a time chart of a data line and an ACK signal line indicating a keystroke disabled period, and FIGS. 3 and 4 are when the keyboard control processor in FIG. 1 sends data. FIG. 5 is a block diagram showing an embodiment of the keyboard device of the present invention; FIG.
figure. FIG. 7 is a flowchart when the keyboard processor in FIG. 5 sends data, FIGS. 8 and 9 are circuit diagrams showing specific examples of the key-not-keying display circuit in FIG. 5, and FIG. 10 is a keyboard according to the present invention. A block diagram showing another embodiment of the device, FIG. 11 is a circuit diagram showing a specific example of the keystroke disabled period detection circuit in FIG. 10, and FIG. 12 is a time chart showing a specific example of serial data transfer. , FIG. 13 is a circuit diagram showing another specific example of the keystroke disabled period detection circuit in FIG. 10. 1... Keyboard device 5... Keyboard control processing circuit 6... Data line 7... Main body 8... ACK signal line 9... Keystroke not allowed display control signal line 10... Keystroke not allowed display circuit 11... Keystroke disabled display control port 17... Keystroke disabled period detection circuit Representative Patent Attorney Akio Takahashi No. 17 Figure 2 Bamboo 3 Design 4 Figure U Figure 6 Figure 77 Figure 19//)

Claims (1)

[Claims] 1. A keyboard device having a plurality of key switches and a keyboard control processing circuit that detects the position of a key when the key is operated and outputs the position as data to another processing system. A keystroke disabled period detection circuit for detecting a period in which no keystroke processing is performed in the control processing circuit and a keystroke disabled display circuit for displaying the keystroke disabled period are provided, and the keystroke disabled period detection circuit detects the keystroke disabled period. A keyboard device characterized in that, when detected, the keystroke-disabled display circuit displays a keystroke-disabled state.