JP2001350565A - Key operation detecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key operation detecting method which can decrease the frequency of repetition of data read processing since the operability of a device becomes worse because of a heavy processing load on a microcomputer system as the data read processing is repeated several times to detect whether or not all keys of a remote controller connected to a key station of, for example, a local government disaster-preventive radio system are operated if the number of the keys of the remote controller is large when a specific group consisting of slave stations is selected by operating keys of the remote controller. SOLUTION: It is made possible to set the input and output of a matrix row part and a matrix column part. Key operation detection is carried out by using data read in when the matrix row part is set to the input and data read in when the matrix column part is set to the input to lighten the processing load on the microcomputer and improve the operability of the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key for selecting a group when a master station issues a command to a slave station of a specific group in a municipal disaster prevention radio system, for example, and a method for detecting an operated key (key operation). Detection method).

[0002]

2. Description of the Related Art An example of a conventional key operation detecting method is shown in FIG.
This will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a conventional microcomputer system. In FIG. 1, 1 is a microcomputer control unit, 2 is a matrix row unit, 3
Is a matrix column section, 4 is a read signal to the matrix row section 2, 5 is a write signal to the matrix column section 3, and 6 is an 8 × 8 key matrix section. It is detected whether the key numbers are operated in ascending order of eight key numbers. By repeating this detection eight times, it is detected whether a total of 64 keys have been operated. That is, after detecting whether the keys 1 to 8 are operated, it is detected whether the keys 9 to 16 are operated. After that, 17-24 keys, 25-32
Are performed in that order, and finally, it is detected whether or not keys 57 to 64 are operated. At the time of initial setting, data D0 to D7 of the matrix row 2 and data D0 to D7 of the matrix column 3 are all 1. When the write signal 5 is transmitted from the microcomputer control unit 1 to the matrix column unit 3, the data D0 is converted to 0 and output. Then, the read signal 4 is transmitted from the microcomputer control unit 1 to the matrix row unit 2. By this transmission, the data D0 to D0 of the matrix row unit 2 are determined according to whether the keys 1 to 7 are operated.
7 is input. The value of the data when the key is operated is 0, and the value of the data when the key is not pressed is 1. For example, when the value of the data D2 becomes 0, the microcomputer control unit 1 detects that the key 3 is operated. In the same manner, whether or not the keys 8 to 16 have been operated,
.., When keys 57 to 64 are operated, a write signal 5 is transmitted from the microcomputer control unit 1 to the matrix column unit 3 and then the matrix column unit 3 One bit of the data D1 to D7 is converted to 0 and output. (Data D1 is 0 when keys 8 to 16 are operated, data D2 is 0 when keys 17 to 24 are operated,...,
D to detect whether keys 57 to 64 have been operated
7 is converted to 0 and output. Then, the read signal 4 is transmitted from the microcomputer control unit 1 to the matrix row unit 2. By this transmission, the data D0 to D7 of the matrix row 2 are input depending on whether or not a key is operated. The value of the data when the key is operated is 0, and the value of the data when the key is not pressed is 1. For example, when the data D3 is converted to 0 from the matrix column section 3 and output, the microcomputer control section 1 determines that the 27 key is operated when the value of the data D2 of the matrix row section 2 becomes 0. To detect.

FIG. 2 is a flowchart showing a key operation detecting method by a microcomputer system as an example of the related art. In FIG. 2, 7 is a key input detection start, 8 is an initial process of the matrix column portion 3, 9 is a read process of matrix row portion data, 10 is a key input presence / absence judgment process, 11
Is a key input determination process, 12 is a key input completion determination process, 1
3 is a key input detection preparation process for the next matrix column, 14
Is a process after the key input is detected. When the key input detection is started (key input detection start 7), the microcomputer control unit 1 causes the matrix column unit 3 to perform a write operation, thereby converting the data D0 from the matrix column unit 3 to 0 and outputting it. (Initial processing 8 of matrix column section 3). Then, the microcomputer control unit 1 controls the matrix row unit 2
Performs a read operation on data D0.
To D7 are input to the matrix row 2 (matrix row data reading process 9). After the data D0 to D7 are transmitted to the microcomputer control unit 1, it is determined whether or not each data (bit) of D0 to D7 has 0 (key input presence / absence determination processing 10). When there is 0 in each data (bit) of D0 to D7, it is determined which key is 0 by determining which bit is 0 (key input determination processing 11). . On the other hand, D0 to D7
If there is no 0 in each data (bit), the key input determination processing is not performed. After determining which of the keys 1 to 8 has been operated, a key input completion determination process 12 and a key input detection preparation process 13 for the next matrix column perform an initial process 8 to a key input determination process 11 of the matrix column portion 3. The operation is repeated seven times. By repeating this operation, keys 9 to 16, keys 17 to 24,.
It is sequentially determined whether 64 keys have been operated. In the key input completion determination processing 12, it is determined whether or not detection of whether or not all (1 to 64) keys have been operated has been completed. When the detection has not been completed, the key input detection preparation processing 13 for the next matrix column performs the matrix column portion 3
By converting the data (bit) one digit higher than the data to 0 and outputting it, it is determined whether or not the corresponding key has been operated.
For example, after the data D1 is converted from the matrix column 3 to 0 and output to detect whether the keys 9 to 16 are operated, the data D1 is converted from the matrix column 3 to the data D2.
Is converted to 0 and output. Then, it is detected whether or not the keys 17 to 24 are operated. After detecting whether or not all the keys (1 to 64) have been operated, the processing 14 after the key input is detected is performed. Processing after key input detection 14
Is used when the master station selects a specific group of a plurality of slave stations in a municipal disaster prevention radio system, for example, a command is transmitted from the master station to all the slave stations in the selected specific group. . For example, when the No. 20 key is operated, a command is transmitted to all slave stations belonging to the group number 20.

[0004]

In the above-mentioned conventional key operation detecting method, when the number of keys is large, several times of repetitive processing are required to detect whether or not all the keys have been operated. Becomes (For example, in the key detection method shown in FIGS. 1 and 2, an 8 × 8 key matrix requires eight repetitions of processing.) Therefore, the processing load on the microcomputer system is increased, and operation of the apparatus is increased. There is a drawback that the property deteriorates. For example, when a key is used when a master station selects a specific group including a plurality of slave stations in a municipal disaster prevention radio system, a command is issued to all the slave stations in the group after selecting the specific group. Time until the operation becomes longer.

Accordingly, the present invention eliminates the above-mentioned disadvantages,
It is an object of the present invention to provide a key operation detection method with extremely high operability, in which the number of times of reading data for detecting whether a key is operated is reduced and the processing load on a microcomputer system can be reduced.

[0006]

In order to achieve the above object, the present invention sets a matrix row portion to input and a matrix column portion to output, and then sets all data output from the matrix column portion to a predetermined value (for example, , 0), and the data input to the matrix row section is transmitted to the microcomputer control section (control section).
Is to be read. Further, after setting the matrix row portion to output and the matrix column portion to input, all the data output from the matrix row portion are set to predetermined values (for example, 0), and the data input to the matrix column portion is converted to the microcomputer control portion ( (Control unit). Then, the data input to the matrix row,
This is to detect which key has been operated or not from the data input to the matrix column.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A key operation detecting method according to an embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a block diagram illustrating the configuration of the microcomputer system according to the present embodiment. In FIG. 3, 1 is a microcomputer control unit, 6 is an 8 × 8 key matrix unit, 15 is a matrix row unit, 16 is a matrix column unit, 17 is a read / write signal to the matrix row unit 15, and 18 is a matrix column unit 16. Read / write signal. First, the matrix row section 15 is set to input and the matrix column section 16 is set to output, and the microcomputer control section 1 reads data D0 to D7 input to the matrix row section 15. Next, the matrix row section 15 is set to output and the matrix column section 16 is set to input, and the microcomputer control section 1 reads data D0 to D7 input to the matrix column section 16. From the data D0 to D7 input to the matrix row section 15 and the data D0 to D7 input to the matrix column section 16, it is detected which key has been operated. The value of the data when the key is operated is 0, and the value of the data when the key is not pressed is 1. Therefore,
For example, if the data input to the matrix row unit 15 is 1
1111110 (D0 only, 0), matrix column 1
6 is 11111110 (D0 only,
In the case of 0), the microcomputer control unit 1 determines that the first key has been operated. The input / output of the matrix row section 15 and the matrix column section 16 is switched by switching between read / write signals 17 and 18 output from the microcomputer control section 1 as read signals or write signals. .

FIG. 4 is a flowchart showing a key operation detecting method by the microcomputer system according to the present embodiment.
In FIG. 4, 7 is a key input detection start, 19 is an input / output setting process of the matrix row section 15 and the matrix column section 16, 20 is an initial process of the matrix column section 16, 2
1 is a process of reading matrix row data, 22 is a key input presence / absence determination process, 23 is an input / output switching setting process of a matrix row portion 15 and a matrix column portion 16, 24 is an initial process of the matrix row portion 15, and 25 is a matrix column. The process of reading the set data, the process 26 for determining the key input, and the process 14 after the detection of the key input are shown. When key input detection is started (key input detection start 7), the microcomputer control unit 1 outputs a read signal to the matrix row unit 15 and outputs a write signal to the matrix column unit 16 (matrix row detection). Section, matrix column section input / output setting processing 19). When the write signal is output, the data D0 to D7 are all converted to 0 from the matrix column 16 and output (initial processing 2 of the matrix column 16).
0). On the other hand, when the read signal is output, data D0 to D7 are input to matrix row section 15 depending on whether or not a key is operated (matrix row section data reading processing 21). After the data D0 to D7 are transmitted to the microcomputer control unit 1, it is determined whether or not each data (bit) of D0 to D7 has 0 (key input presence / absence determination processing 22). And each data (bit) of D0 to D7
Is 0, the data of D0 to D7 is transmitted to the microcomputer control unit 1. On the other hand, when there is no 0 in each of the data (bits) D0 to D7, the operation of the matrix row data read processing 21 to the key input presence / absence determination processing 22 is repeated. After the data D0 to D7 are input to the microcomputer control unit 1, a write signal is output to the matrix row unit 15 and a read signal is output to the matrix column unit 16, so that the matrix row unit 15, The input / output of the matrix column 16 is switched (input / output switching setting processing 2 for matrix row and matrix column)
3). When the write signal is output, the data D0 to D7 are all converted to 0 from the matrix row unit 15 and output (initial processing 2 of the matrix column unit 15).
4). On the other hand, when the read signal is output, data D0 to D7 are input to the matrix column section 16 according to whether or not a key is operated (matrix column section data reading processing 25). Then, the data D0 to D7 are transmitted from the matrix column section 16 to the microcomputer control section 1. The microcomputer control unit 1 stores the data D0 to D7 transmitted from the matrix row unit 15 and the matrix column unit 16
It detects which key has been operated from the data D0 to D7 transmitted from. For example, matrix row 1
5 is 11110111 (D3 only,
0), the data input to the matrix column section 16 is 11
In the case of 1111011 (only D2, 0), the microcomputer control unit 1 determines that the 20th key has been operated. If the key is used when the master station selects a specific group consisting of a plurality of slave stations in a municipal disaster prevention radio system, for example, the process 14 after detecting the key input is performed when all the children in the specific group selected from the master station are used. The command is transmitted to the station. For example, when the number 20 key is operated, the group number 20
The command is transmitted to all the slave stations belonging to.

In the conventional key operation detection method, as described in the above-mentioned conventional technology, it is determined whether or not all the keys have been operated unless the detection of the key operation by reading data is repeated eight times. No (detects whether eight keys have been operated at once, and repeats this detection eight times to detect whether a total of 64 keys have been operated). On the other hand, in the key operation detection method of the present embodiment, it is possible to detect whether or not all the keys have been operated by repeating the data reading twice (the D0 to D7 transmitted from the matrix row unit 15). It is detected which key has been operated from the data and the data D0 to D7 transmitted from the matrix column section 16). Accordingly, since the number of times of reading data can be reduced, the processing load of the microcomputer system can be reduced in this embodiment.
Therefore, it is possible to provide a key detection method with extremely good operability.

In this embodiment, the key operation detecting method in the case of an 8 × 8 key matrix section has been described, but the present invention is not limited to this. mxn (m vertical, n horizontal)
It is apparent that the key operation can be detected in the same manner in the key matrix portion (ie, which key has been operated).

[0011]

According to the present invention, the number of times of reading data for detecting whether or not a key is operated can be reduced to two times, so that the processing load on the microcomputer system can be reduced. Therefore, it is possible to provide a key detection method with extremely good operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a microcomputer system as an example of a conventional example.

FIG. 2 is a flowchart showing a key operation detection method by a microcomputer system which is an example of the related art.

FIG. 3 is a block diagram showing a configuration of a microcomputer system according to an embodiment of the present invention.

FIG. 4 is a flowchart showing a key operation detection method by the microcomputer system according to one embodiment of the present invention;

[Explanation of symbols]

1: microcomputer control unit 2: input matrix row unit 3: output matrix column unit 4: read signal line 5: write signal line 6: 8 × 8 key matrix 7: key input detection start 8: matrix column initial processing 9 : Processing for reading matrix row data 10: Key input presence / absence determination processing 11: Key input determination processing 12: Key input completion determination processing 13: Key input detection preparation processing for the next matrix column 14: Processing after key input detection 15: Input / output matrix row section 16: Input / output matrix column section 17: Read / write signal line 18: Read / write signal line 19: Input / output setting processing of matrix row section and matrix column section 20: Initial processing of matrix column section 21: Matrix row data read processing 22: Key input presence / absence determination processing 23: Matrix Parts, output switching setting processing of the matrix row part 24: the initial processing of the matrix line section 25: matrix row part data reading processing 26: key input determination process

Claims (1)

[Claims] 1. A key matrix unit having keys arranged in a matrix of m in the vertical direction and n in the horizontal direction, and m bits of data connected to the key matrix unit and operated according to the operation of the keys. A matrix row portion to be input, a matrix column portion connected to the key matrix portion to receive n-bit data according to the operation of the key, and a matrix row portion and a matrix column portion from the key matrix portion. And a control unit for controlling data input of the key system. The control unit, after inputting m-bit data output from the key matrix unit to the matrix row unit, The control unit further inputs the n-bit data output from the key matrix unit into the matrix column unit. After reading the data, the n-bit data is read, the operated key is detected from the m-bit data and the n-bit data, and the key operation is detected in two data reading processes. Characteristic key operation detection method.