JPS58146924A - Control bus system - Google Patents

Abstract

PURPOSE:To reduce the number of interface lines between devices, by dividing control data and answer data into plural blocks to transfer them. CONSTITUTION:When a request to send control data is generated, a CPU1 sets a transmission/reception switching line to the transmission mode. In order to send the 1st block of the control data, the CPU1 sends the 1st block data to a data line, sets a transfer word number line to the 1st block display and sends a transmission synchronous signal. In the same manner, the CPU1 sends the 2nd block data to the data line, sets up the transfer word number line to the 2nd block display and sends a transmission synchronous signal in order to send the 2nd block. Thus the CPU1 divides the control data consisting of 32 bits into two blocks each of which consisting of 16 bits to send them to speed path equipment.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to a control path connecting a control device and peripheral devices in a data processing system consisting of a control device and peripheral devices. This invention relates to a communication path system that connects a central control unit and single-path equipment in a switching system.

←) Background of the Technology In electronic exchanges and the like, a large number of buses are used to transmit various data and control data between a central control unit and other communication line equipment. However, as the number of interface wires increases, not only the number of scissors interface wires increases.

The amount of hardware in the interface area will increase. Therefore, there is a need for a control bus system that can reduce the number of interface lines between devices.

(c) Prior Art and Problems FIG. 1 shows a communication line bus in a conventional electronic switching system.

Conventional communication line buses include a bus 8PAB for transferring control data and a round bus 8PW for transferring answer data.
9 control data sent from the central control device 1 is transferred to the communication channel system device 2 via 5PAB, and

The communication path equipment that received the control data transferred the answer data to the central control unit using 8PWB and communicated with it.The data was not divided into multiple blocks, but was sent and received by Im transfer. . The 8PAB path is composed of a transmission synchronization signal line and a transmission data line, and the 8PWB bus is composed of a 1-bit A8W signal line and an answer data line that notify the quality of processing for control data. The time relationship is shown in Figure 2.

In general, the data width of the communication bus is the same as the width of the control data used for processing by the central controller 1, so the central controller 1 processes 32-bit data as 111. if there is.

The reason for having a data width of 32 bits is that the data is not divided into multiple blocks and transferred.

The number of data lines is 32. For Jin.

A conventional communication bus requires the same number of data lines as the number of word bits used by the central controller.

In addition, since it consists of two bus systems, 5PAB and 8PWB, there are a large number of interface lines, and as the number of lines is large, the amount of hardware for the interface part of those buses increases. However, there are drawbacks such as the large amount of space required to accommodate these interface wires.

) purpose of the invention The present invention eliminates these drawbacks to rounding.

The purpose is to reduce the number of interface lines, reduce the amount of metal materials in the ink processing section, and reduce the space required for the interface section.

(E) A data thermal system consisting of the configuration control device of the invention and a plurality of peripheral devices connected to the wrinkle control device via a control bus, #
In the control bus method, control data is sent from the control device with sending synchronization, #control data is received, and the Marutetsu peripheral device returns answer data with answer synchronization to perform 3 communications.

The wrinkle control bus is a bidirectional data line for transferring control data and answer data, and a synchronization signal for control data. Transmission synchronization line, answer synchronization line that transfers the answer data synchronization signal, transfer word count line that displays the number of times the control data and answer data have been sent, answer data lines that display the status of peripheral devices along with the answer data, and the data line. When the control device sends control data to the peripheral device, the control device sets the transmission and reception switching line to the direction in which the peripheral device receives data. death,
The control data is divided into multiple blocks, and after successively transmitting the control data multiple times for each program along with the transmission synchronization signal and transfer word count display signal, the transmission/reception switching line is set so that the peripheral device can transmit. Set and also.

When sending answer data to the control device (from the peripheral device), the peripheral device confirms that the transmission/reception switching line is designated to receive the peripheral device, and transmits the answer data to the same number of programs as the control data. The control device sequentially transmits the answer synchronization signal, transfer word count display signal, and answer code signal multiple times for each block, and after receiving a plurality of answer data from the peripheral device, the control device switches the transmission/reception switching line to the corresponding The present invention is implemented by providing a control bus system characterized by overconfidence between the control device and the peripheral device.

(F) Embodiments of the Invention One embodiment of the present invention will be described in detail below with reference to the drawings. The control path method O-embodiment according to the present invention is shown in the third cabinet, and the fourth
The figure shows the time relationship of signals on the bus.

Sends 32-bit control data from central controller 1 9
The operation when receiving 32-bit answer data from the communication path system device 2 will be described below.

When a request for sending control data is generated, the central control unit 1 first sets the transmission/reception switching line to a transmission mode (central control unit→communication path device) K. (Figure 1) Next, in order to send the first block of control data, send the first block of data to the data line.

Set the transfer word number line to display the first block and send out the sending synchronization signal. (FIG. 4b) In order to send out the 2nd block, the data of the 2nd block is sent to the data line, the number of transferred words - is set to display the 2nd block, and an exit synchronization signal is sent out. (Figure 4C) As described above, the central control unit converts 32 bits of control data into one
This is because the data is divided into two blocks (6 bits') and sent to the communication line equipment. Send the block from above, or
Or, whether to send it from a lower level is performed according to a predetermined procedure.

Upon completion of sending the control data, the central controller sets the transmission/reception switching line to reception mode (communication path device→central controller). (Figure 4 d) Each channel device takes in the control data sent from the central control device by sending synchronization, and each channel device uses the device designation information included in the control data to identify its own device. Check if you have specified it.

- If the request is received, the control data is processed and the answer data is returned.

The communication path equipment is set to □111 when the transmission/reception switching signal is in reception mode.
15 Confirm that there is. (Figure e in $14) Next, in order to send the first block of answer data, the first block data is sent to the data line, and then the lth block of answer code is sent out and the transfer word count line is set to display the first block. and sends out an amplifier synchronization signal. (Fig. j14 f) To send the 2nd block, send the 2nd block data to the data line, and then send the 2nd block of the answer code and set the transfer word number line to display the 2nd block.
Sends an answer synchronization signal. (Fig. 4g) As described above, the communication path system divides the 32 bits of answer data into two blocks of 16 bits each, and completes sending them to the central control unit.

The central control unit receives the answer data sent from the channel system devices through answer synchronization.

Upon receiving a predetermined number of blocks, the central control device determines that the multi-communication has ended, and sets the transmission/reception switching signal to the transmission mode. (Fig. 4h) The above allows overconfidence between the central control unit and communication line equipment.

Next, the failure detection function of bus data transfer will be explained. However, conventional techniques such as parity check will be omitted.

First, the communication path system device checks whether the number of transferred words at the time point c in Fig. 4 is normal or not, and detects an error in the order of data transmission from the central control unit.

Check whether the transmission/reception switching shown in FIG. 4(d) is performed within a normal time and detect the switching function 2- of the bidirectional data line of the central control unit.

The central control unit checks whether the display of the number of transferred words at the time points f and g in Figure J14 is normal, and detects an error in the order of data transmission of the 2 channel system equipment.

Further, it is checked whether the times shown in FIG. 4d to FIG. 4f are within normal time, and when the time is over, non-response of communication path equipment is detected.

The answer cord line is used to notify the central control unit from the communication path equipment when the above-mentioned failure is detected, and to notify the status of the communication path equipment if control data cannot be processed depending on the state of the communication equipment. used for

Comparing the interface lines in Figure 1 and Figure #I3, it is clear that the present invention has the advantage of reducing 66 interface lines to 24, which is less than half.

Aya, since the data tube is divided into multiple blocks and sent out, the transfer speed may be reduced.

Due to the high performance and high speed of bus elements, methods such as sending out two transfer pulses in the white part of one transfer pulse and speeding up processing in one channel system device are now available. It is thought that the conventional transfer time can be sufficiently satisfied by using a method of advance control in which processing is started in advance.

(G) As described in detail of the invention, according to the present invention, control data and answer data are divided into multiple blocks and transferred, so the number of interface lines between devices can be significantly reduced, and the number of interface lines can be reduced significantly. This has the advantage of reducing the mounting space for parts and reducing the amount of metal materials.

Furthermore, since the control bus system according to the present invention requires fewer interface lines, it is effective for the interface of highly integrated devices.

[Brief explanation of the drawing]

Fig. 1 is a connection diagram of a communication line bus in a conventional electronic switching system, Fig. 2 is a time chart showing the time relationship of signals of a conventional control bus, and Fig. 3 is an example of a control bus system according to the present invention. FIG. 4, which is a block diagram of the embodiment, is a time chart showing the signal time relationship of control data according to the present invention. In the drawings, 1 indicates a central control unit, and 2 indicates a communication path system device. Agent Patent Attorney Hiroshi Matsuoka ’1, Nikie tμ = Continued from page 1 ■Applicant Nippon Telegraph and Telephone Public Corporation ■Applicant NEC Corporation 5-33-1 Shiba, Minato-ku, Tokyo■ Applicant: Hitachi, Ltd. 5-1 Marunouchi, Chiyoda-ku, Tokyo

Claims (1)

[Scope of Claim] A data contemplation system comprising a control device and a plurality of peripheral devices that perform scissor control installation via a control path,
The control device sends control data along with the sending period, and the peripheral device receives the data. In the control path method that returns answer data together with the undetermined period to ensure overconfidence, the #control bus is a bidirectional data bundle that transfers control data and answer data. -Transfer one data synchronization signal. Transmission - Period line, AntM period line to transfer the synchronization number of Anna data, Transmission word count to display the number of transmission of m data and answer data -
, Amplifier code that displays the status of peripheral devices along with answer data - Transmission/reception switching that indicates the transfer direction of data
When transmitting control data from the control device to the wrinkle peripheral device, the control device sets the transmission/reception switch to the mode where the chest device receives the data, and the control data is sent to multiple blocks. Split. After transmitting the armpit control data for each block multiple times in succession together with the transmit synchronization signal and the transfer word count display signal. Set the transmission/reception switching line so that the peripheral device is transmitting, and
When sending answer data from the peripheral device to the control device, the peripheral device confirms that the transmission/reception switching line is the transmission specification for the peripheral device, and divides the answer data into the same number of blocks as the control data. It is divided into blocks and sent out multiple times in succession along with the answer synchronization signal, transfer word count display signal, and answer code signal for each block. The control device performs communication between the control device and the peripheral device by setting a transmission/reception switching line to receive the peripheral device after receiving answer data from the peripheral device a plurality of times. Pass method.