JPS639254A - Code converting device - Google Patents

Abstract

PURPOSE:To quickly convert a signal into various code systems by providing plural code system registers, the prescribed number of code conversion groups converting the code systems in two-way and a control circuit controlling the conversion timing. CONSTITUTION:In converting a BIN code system into an ASCII code system, when the information of the BIN code system is inputted from an information input line L1, it is fetched in a BIN register 81 at first and stored tentatively. Then the stored information is converted into the BCD code system by a BIN- BCD converter 91a and fetched in a BCD register 82. The fetched information is converted into the ABCII code system by a BCDASCII code converter 92 and fetched in an ASCII register 83. The information converted into the ASCII code system is extracted from the register 83. The similar operation is executed according to the conversion timing of the control circuit 10 to apply the various code system conversion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a code conversion device that converts information in one code system to information in another code system.

[Prior Art] Generally, when encoding information such as characters, figures, symbols, etc.
Standard code systems such as BIN code system, A
SCII code system.

Coded according to the BCD code system, etc.

When transmitting information between devices with different coding systems, the information bit structure in one coding system must be converted into the character bit structure in another coding system before the information can be transferred between each device. becomes possible.

Figure 4 is a diagram showing the connection configuration between each device that requires code conversion. In Figure 9, 1 is the transmitting terminal, 21.2
2 is an I10 interface that adjusts differences in timing, electrical signals, codes, etc. when transmitting and receiving information between two devices; 3 is a display device composed of, for example, an 8-segment LED; 4 is a terminal on the receiving side; 5 is a bus interposed between the terminal 1 on the sending side and the I10 interface 21.22, 51 is a bus interposed between the I10 interface 21 and the display device 3, and 52 is a bus interposed between the I10 interface 22 and the receiving side. This is a communication line interposed between the terminal 4 and the terminal 4.

In the information communication system configured in this way, information is transmitted from the transmitting terminal 1 to the display device 3 via the bus 5, I10 interface 21, and bus 51,
When displaying characters, numbers, symbols, etc. on the display device 3, I1
The 0 interface 21 converts the binary code (BIN code system) transmitted from the transmitting terminal 5 into a BCD code system and transmits it to the display device 3.

Also, from terminal 1 on the sending side to bus 5, interface 2
2. When transmitting information to the receiving terminal 4 via the communication line 52, the I10 interface 22 receives the binary code (BINU code -v-) sent from the transmitting terminal 1.
> into the ASCH code system and transmits it to the receiving terminal 4.

However, in such conventional code conversion, code conversion is performed by hardware using an IC chip for code conversion, or by a control unit or a calculation unit.

Programs were created using a microprocessor that integrated each component such as a register section and a memory section, and code conversion was performed using software.

Figures 5 (A) and (B) show the state of such a code conversion device, and Figure 5 (A) shows the BIN code system.
An example of the decoder 6 that converts to the CD code system is shown in FIG.
4-bit BIN that stores 1 and inputs to cpu'r
1 shows an example of a microprocessor that converts codes to the 8-bit I-A SCII coding scheme.

[Problems to be Solved by the Invention] Conventional code conversion devices are configured as described in section 1, so when conversion is performed using hardware, the conversion speed is fast, but it is always possible to convert from one code system to another. There was a problem that the code conversion could only be converted into one code system, and the versatility of the code conversion could not be maintained.

In addition, when doing this using software, it is possible to convert codes from one code system to any other code system by preparing several types of code conversion programs, but this has the problem of slowing down the conversion speed. Ta.

This invention was made to solve the above-mentioned problems, and its purpose is to obtain a code conversion device that can convert codes from one code system to several other code systems. .

[Means for Solving the Problems] For this reason, the code conversion device according to the present invention has a plurality of code converters that store information that is discriminated depending on the difference in code system when information in different code systems is input. a register, and a code converter that converts information of one code system stored in one of the plurality of registers into information of another code system and stores it in another register;
and the information of the other one code system stored in the other one register above.The information of the one code system -
J.2 Interposed between the above one register and the above other one register, which is composed of a pair of other code converters that convert information of one code system and store it in the above one register. a code converter group consisting of one register less than the number of registers mentioned above, and controls the input/output of information stored in the plurality of registers, and also controls the timing of conversion of the code converter. The present invention is characterized in that it includes a control circuit that converts information of one arbitrary code system into information of another code system and retrieves the information from the register.

[Operation] The register according to the present invention stores information discriminated by the difference in code system for each code system when information of different code systems is input.

The code conversion group includes a code converter that converts information of one code system stored in one register and stores it in another register, and a code converter that converts information of one code system stored in one register, and a code converter that converts information of one code system stored in one register, and −The information on the coding system is shown above−
The information of the above code system is converted into the information of the above one code system and stored in the above one register.

Here, the control circuit controls the input/output of information stored in the plurality of registers, and also controls the conversion timing of the code converter to convert information of one arbitrary code system into another code system. It acts to convert the information into information and retrieve it from the register.

[Embodiment] An embodiment of the present invention will now be described based on the drawings. 1st
The figure is a configuration diagram showing one embodiment of the present invention, and in the figure, 8
1 takes in the input BIN code system signal from the information input line L1, or inputs information from another code system to the BIN code system.
A BIN register 82 is for storing a signal converted to the N code system, and a BIN register 82 takes in a BCD code system signal input from the information input line L1, or stores information converted from another code system to the BCD code system. A BCD register 83 for importing the ASCII coco-integrated system information input from the information input line L1,
Alternatively, the AS CII register 91 is used to take in information converted from other code systems to the A S CII coco system, and converts signals in the BIN code system to signals in the BCD code system, or converts signals in the BCD code system to signals in the BCD code system. a first code conversion group for converting into a signal of the BIN code system;
92 is a second code conversion group that converts information in the BCI) code system to information in the ASCII here-one system, or converts information in the ASCII here-in-one system to information in the BCD code system; 10 is a BIN register 81; ．． BCD register 82+, AS CII register 83. First code conversion group 91. By outputting timing signals and control signals for controlling the storage operation and conversion operation of the second code conversion group 92, information of one code system inputted from the information input line L1 is transferred to information of another code system. This is a control circuit that converts the information into the code system and extracts information of the converted code system from each register 81, 82, and 83.

Here, the first conversion group 91 is a BIN-BCD converter that converts information in the BIN code system to information in the BCD code system.
It is comprised of a code converter 91a and a BCD-BIN code converter 91b that converts the code into information in the BCD code system.

Further, the second code conversion group 92 code converts information in the BCD code system into information in the ASCII coco system.
CD-A SCII code converter 92a.

It is composed of an ASCII-B CD code converter 92b that converts the code of ASCII Coco-integrated system information into BCD system information.

Next, the operation will be explained.

Now, let us consider as an example the case where information of the BIN code system is inputted from the information input line L1 and information of the ASCII coco system is retrieved.

In this case, when information in the BIN code system is input from the information input line L1, the information in the ASCII code system is first taken into the BIN register 81 and then
It is temporarily stored at 1.

Next, the information stored in this B, IN register 81 is
IN-BCD converter 91. According to a, the BIN code system is converted to the BCD code system, and the BCD register 8
Incorporated into 2. , BC taken into the BCD register 82 ;D-! - Information on the code system is roughly B C
A S by the D-A S CII code conversion group 92a
The data is converted into a CII system and taken into the ASCII register 83.

Therefore, the information converted to the A S C11 code system is A
It is retrieved from the SCII register 83.

Similarly, input BCD system information from the information input line Ll,
A When extracting the signal of SC11 code system, B
Through the CD register 82, the B CD-A S CH code converter 92a, and the ASCII register
Convert to CII coco-integrated information, ASC, II
It is taken out from the register 83.

Enter information in the same way! When inputting information in the A S and CII code system from 1aLl and converting it to information in the BIN system and taking it out, first input the information from the information input line LL to A S.
CII register 83, AS CII-B CD
Need converter 92b, BCD register 82, BCD-B
A signal of the BIN code system is extracted to the outside through the IN code converter 91b and the BIN register 81, respectively.

Next, the detailed configuration of each register, each code converter, and the control circuit will be explained based on FIG. 2.

FIG. 2 is a diagram showing an embodiment of each register, each code converter, and a control circuit, and as shown in the figure, the BIN register 8
1 is a channel A that stores information in the BIN code system input from the information input line Ll, and a BCD-BIN
It consists of a channel B that captures and stores information converted into the BIN code system by the code converter 91b.

The BCD register 82 also has a channel A that takes in data converted to the BIN code system, a channel B that takes in the BCD code system signal inputted from the information input L1, and an ASCII-BCD code converter 92b that converts the data into the BCD code system. It consists of a channel C for taking in converted information and a channel D for rotating data stored in each of the three registers of channels A, B, and C.

Mata A S CII Register 83 HaB CD -A
A SCI code converter 92a
Channel A for sequentially importing data converted to I-coco-one system, channel B for inputting information of A S CII-coco-one system inputted from information input line Ll, and channel A and channel B. The data stored in is rotated to the right, and each -digit is
-B channel C which transfers data to the BCD register 82 via the CD code converter 92b.

With a channel that rotates the register like this,
It becomes possible to convert code information with different numbers of bits.

In this embodiment, the BIN code system signal has 14 bits, and the BCD code system signal has 4 digits.
An example is shown in which the signal of the ASCII system is 8 bits.

Further, signals input and output to the control circuit 10 are shown in FIG. 2(B), and as shown in FIG. 2(B), the control circuit 10 includes
External data to BIN register 81 and BCD register 82
, an address signal that determines which of the ASCII registers 83 is to be input or output, and an R/W signal that determines whether external data from the outside is to be taken in or output to the discriminated register. A DS signal that controls data capture and output is input to the BIN register 81. T for loading data into each register of BCD register 82 and ASCII register 83;
BIN signal, LBCD signal, timing signal of LASC signal, and GBIN signal and GBCD signal for selecting input/output of each register of BIN register 82 and ASCII register 83.

GASC signal is output.

A timing chart of signals transmitted between the control circuit 10', the BIN register 81, the BCD register 82, and the ASCII register 83 is shown in FIG.

For example, the timing chart when the BIN code system is converted to another BCD code system or the ASCII coco system is explained based on FIG. 3 (A). 81 selects register A, and here control circuit 1
When the LBIN signal is output from 0, the falling edge of this LBIN signal causes external data as a BIN signal input from the information input line L1 to be transferred to the BIN register 81.
is taken into register A of.

This fetched external data is transferred to the selected BCD register 82 by the GBCD signal output from the control circuit 10.
LBCD output from the control circuit 10 to register A of
Based on the first pulse of the signal, BCD-converted external data output from the BIN-BCD code converter 92a is taken in.

Thereafter, while rotating the BCD register 82, external data in the BCD code system is transferred digit by digit to the ASCII register 83.

Similarly, from BCD code system to other BIN code system and A
Figure 3 (
The conversion is performed according to the timing charts shown in B) and (C).

[Effects of the Invention] As explained above, the present invention has a plurality of registers that store information that is discriminated depending on the difference in the code system when information in different code systems is input, and a single register. A code converter converts information of one code system stored in the register and stores it in another register, and a code converter converts information of the other code system stored in the other one register. It consists of a pair of code converters that convert information of one code system into information of the one code system and store it in the one register. A plurality of code conversion groups interposed between them and the input/output of information stored in the plurality of registers are controlled, and the timing of conversion of the code converter is controlled to convert information of any one code system. Since it is equipped with a control circuit that converts the information into the information of one other code system and retrieves it from the register No. 1, the configuration is simple and the conversion speed is fast. It is possible to convert into a signal of a coding system and to obtain bidirectionality of the conversion.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG. 2 (A
) is a detailed configuration diagram of each register, Figure 2 (B) is an explanatory diagram of input and output signals of the control circuit, and Figures 3 (A), (B), (
C) is a timing chart showing the timing of each signal when converting from one code system to another, Figure 4 is a connection configuration diagram of each device that requires code conversion, and Figure 5 (
A) and (B) are schematic diagrams showing a conventional code conversion method. 81...BIN register, 82...B
CD register, 83...AS CII register,
91...First code conversion group, 92...Second code conversion group, 91a...BIN-BCD code converter, 91b...BCD-BIN code converter, 9
2a--BCD-ASCII: L-code converter, 92b
...AS CII-B CD code converter. Patent applicant: Anritsu Corporation Figure 2 (A) Figure 3 (A) Figure 3 (B)

Claims (1)

[Claims] A plurality of registers that store information for each code system that is discriminated based on the difference in code system when information of different code systems is input, and one code system stored in one register among the plurality of registers. A code converter converts the information of the other code system into information of another code system and stores it in another register, and converts the information of the other code system stored in the other register into a code converter group consisting of pairs of code converters, the number of which is one less than the number of the plurality of registers, of another code converter that converts into code system information and stores it in the one register; Controls the input/output of information stored in the plurality of registers, and also controls the conversion timing of the code converter to convert information of any one code system to information of another code system. A code conversion device comprising a control circuit that reads data from the register.