SU896613A2 - Interface - Google Patents

Description

one

The invention relates to the field of computer technology and is intended to interface a group of digital computers to a computer system.

According to the main auth. No. 777655 a device is known for interfacing, which contains a decryption unit, a broadcasting unit whose inputs / outputs are corresponding linear inputs-outputs, devices, and the input and output are connected to the first input of a parallel code converter to a serial one and the first input of a serial code converter parallel, the second input of which is connected to the first output of the clock generator connected by two-way communication with the bit counter and the first output of the converter of the parallel code to successive, second input and output of which are connected respectively to the first output of the accumulator and to the input of the clock generator, the second input of which is connected to the first output of the control unit and the first inputs of the accumulator and communication unit to the machine connected by the first

and the second outputs, respectively, with the first and second inputs of the control unit, BTOptJM input and output, respectively, with the second output and. the input of the accumulator, and the inputs-outputs — with the corresponding machine inputs-outputs of the device, the first inputs and outputs of the control unit are connected respectively to the primary device and

10 second inputs of the request code register, the output of which is connected to the third input of the parallel code to serial converter and the first stop input of the interrogator,

15 control input, the start input and the second stop input of which are respectively connected to the first, second and third inputs of the control unit, the first output of the control unit is connected to the input of the service word encoder connected to the fourth input of the parallel code-to-serial converter and the first input decryption unit, second and

25 the third outputs of which are connected respectively to the output of the converter of the serial code into parallel, to the output of the polling unit, the output of the polling unit is connected to the third

30 input control unit.

In addition, the polling unit contains a group of OR elements whose outputs are the outputs of the subscriber, the encoder of the addresses of the subscribers, the outputs of which are connected to the corresponding inputs of the elements of the OR group, the decoder of the address of the subscribers and the register 7 whose outputs are connected to the corresponding inputs of the encoder of the addresses of the subscribers, the mask di-diverter the output and the input respectively with the register input and the output of the mask register, whose input is the control input of the block, the counter of the subscriber, whose input and output are connected accordingly with the input of the address address decoder and the output of the synchronization node, the first and second inputs of which are the corresponding block stop inputs, the third input is the block start input, and the fourth input is connected to the pulse generator 13 ..

The known device for pairing does not allow detecting failures or malfunctions that lead to a violation of the exchange algorithm and are expressed in the absence of a response from the subscriber with whom he exchanges or exchanges the information of the interrogator CVM.

Such cases are possible, for example, in case of malfunction or malfunction of the memory elements in the control units of the device for pairing, counters, errors in command codes or addresses, information hanging in communication channel devices or information exchange channels of digital computers, etc.

This reduces the testability of the device and leads to non-production. A great deal of equipment.

The purpose of the invention is the expansion of operational capabilities through rapid detection of combat. or malfunctions of the device for interfacing or information exchange channels of the digital computer and increasing the efficiency of the group of digital computers forming the system

The goal is achieved by introducing a zeroing timer and shaper into the known interface device, with the additional outputs of the decryption unit connected to the control inputs of the timer and the first input of the zeroing shaper, the output of which is connected to the zero output of the device, the first output of the sync pulse generator with a clock input, the output of which is connected to the auxiliary input of the ancillary word encoder .and to the second input of the zero signal generator. .

Such a device scheme allows to quickly detect failures or malfunctions of both the device for interfacing and the information exchange channels of digital computers, and to eliminate unproductive subscriber downtime (digital computers)

In this case, all cases of failures or malfunctions are revealed that lead to a violation of the exchange algorithm and are expressed in the absence of response signals from the subscriber (DVM) responder.

Detection of the indicated failures or faults is performed by setting the time counting unit to a time slightly longer than the longest exchange session, as a result of which the Scrap signal is generated only in case of a normal exchange failure after the specified time has passed without the PC.

FIG. 1 shows a block diagram of a multi-machine system and a block diagram of an interface device; in fig. 2 - a functional block diagram of the survey.

The system contains interface 1 devices (US) connected by machine inputs-outputs 2 and 3 to the corresponding digital computers, and inputs-outputs 4 and 5 to the lines b and 7 of communication. Each device 1 includes a communication unit 8 with a machine, a control unit 9, a service word encoder 10, a request code register 11, a clock generator 12, a decryption unit 13, a polling unit 14, a counter 15 bits, a drive 16, a parallel code converter 17 to serial, serial to parallel converter 18, translation unit 19, timer 20, zeroing signal generator 21, zeroing output 22

The polling unit (FIG. 2) contains a subscriber address decoder 23, a subscriber address encoder 24 consisting of a group of encoders 25, group elements OR 26, a pulse generator 27, a synchronization node 28, a mask register 29, control input of the ES, and stop inputs 31 , the input 32 of the start of the polling unit and the output 33 of the polling unit, the decoder 34 of the mask, the register 35, the counter 36 of the subscriber.

The device works as follows.

The exchange digital computer exposes through the block 8 the service word Request to the register 11. The service word format contains the addresses assigned to the digital computer and the DC 1 of the interrogator and the responder, the command code, the sign of the service word.

In any one of the devices 1, block 14 is turned on, which cyclically sends service words to the communication line Interrogation, performed sequential polling of registers 11, starting with the first CSS, by successively changing the addresses of subscribers in these service words.

At the same time, each complex (digital computer and interface devices) is assigned an address in advance using the switches of block 13, which analyzes addresses and service words. When polling the register 11, the US reads the word Request to line B and 7 through the converter 17 and block 19. The UST reporter, to which the Request is addressed, receives the Request through block 19 and the converter 18, analyzes the signs of the service word , commands and addresses and, if the Request belongs to this complex, it translates it through blocks 9 and 8 to a digital computer in the form of an interrupt signal. At the same time, the read Request stops the block 14 and enters the decryption block 13 of the requestor US, where it is decrypted, and the signal from the output of block 13 starts counting the timer 20, Timer 20 is preset to a time longer than the longest exchange session, After receiving the signal The request of the respondent CMV, in case of unavailability for the exchange, sends to the address of the interrogator CVM, the control word Zan, which is similar to other service words on the communication lines, and then via the service word channel, the RS-requestor enters the CVM In addition, the service word Zan is decrypted by decryption block 13 of the requestor PC, and the signal from the output of this block stops counting the timer 20 / returns to its initial state. Then the digital interrogator issues the Start word service to start the block. The responder CVM is ready to be exchanged, then, upon receiving the Request, it issues a service word from the requestor's CEM, which is transmitted and processed in the same way as other words and is sent to the interrogator CVM as an interrupt signal. After receiving the word Answer, the exchange between the pair of specified digital computers is considered to be established, and the requestor digital computer issues an array of control words to the respondent digital computer. The remaining digital computers of the complex at this time are not affected by information. The array of control words transmits s to line 6 and 7 through the information channel of the USQCH; input 2 - block 8 - block 9 - accumulator 16 - converter 17 - block 19. When this part of the words of this array is used to set up block 9, fix the amount of information transmitted in it in the array of control words, the number of transmitted parts (macros ) in the information array and the amount of information transmitted in the last incomplete macrosword. For this purpose, block 9 contains, in particular, the register of settings, a counter for the number of words in the macro language, which serves as an address builder for the accumulator, and a macro counter. Block 9, after writing information to the settings register, to the word counter and writing the array of control words to the accumulator, generates a signal from the overflow pulse of the word counter in the digital computer via a circuit; block 8 — output 3 to stop the exchange and organizes the output of this array on line 6 and 7 zi, drive 16, converter 17 and block 19. When information and service words are used, generator 12 and counter 15 are used, which counts the information bits in a word. From lines 6 and 7, the array of control words enters the response digital computer US-rep tchiku: block 19 - converter 18 - block 9 - drive 16 - block 8 - output 3, the same as described above, block 9 is configured and the signal is generated to resume exchange with the digital computer via the circuit block 9 - block 8 - output 3, Similarly, the exchange of an array of control words is carried out by exchanging the macros of the information array, and the increase in the exchange rate is achieved by simultaneously recording one macro word from the DVR transmitter into the drive 16 of the US transmitter and reading another macro word from the drive 16 US-N iemnika, for example, a digital computer-transmitter outputs a first makroslovo transmitter CSS drive. After the accumulation is full, the digital transmitter interrupts the exchange. Then, the first macro is transferred to the drive of the US receiver. After the US receiver accumulator is filled up and the US transmitter transmitter accumulator is cleared, the second macrosword is written to the US transmitter transmitter and the first macrosword from the US receiver accumulator according to the signals of the blocks 9 of these CSS. After recording the second macrosword, the control unit of the US transmitter senses the readiness signal for issuing the second macrosword to the US responder. After reading the first macros, the US reception is generated using the control unit and the encoder 10 and the service word Receipt forms into the US transmitter. of the service word and signal readiness for issuing the second macro-word, block 9 of the US transmitter organizes

issuance of a second macro word to the US receiver.

Exchange with such a construction of a communication system is possible both in single words and in any given number of macros.

The formation of the check bits control modulo two and the checksum assigned to the digital computer of the complex. If an error is detected in the transmitted information, the DVR receiver forms and executes the Marriage word, and the exchange session is repeated. After the end of the exchange session, the DVR receiver enters the service word. The end of the exchange, which is entered into the decryption block 13 of the US interrogator, is decrypted, and the signal from the output of this block stops the countdown in timer 20. Then the DVR receiver issues the Start word, which starts the block 34

If, after issuing the Request and switching on timer 20, the response service words Zanto or End of the exchange do not arrive in the requestor, the timer 20, after the countdown time elapses, issues a signal, first to the zeroer signal generator 21, and then into the encoder 10 service words, which forms the service word Marriage for lack of response.

The shaper 21 introduces a zeroing signal, which arrives at the zeroing output 22 and sets all the blocks of the requester to the initial state, thereby ensuring the passage of the Marriage word of no response to the interrogator's CVM (in the case of an interrogator’s fault).

Then, the interrogator CVM issues the service word Marriage due to lack of response to the respondent CVM via the service words of the requestor, the response usb, and the communication line, in the same way as the transfer of other service words.

After this service word enters the decryption unit 13 of the US responder, unit 13 organizes, through the driver 21 and output 22, the installation of the response unit US service units, thereby ensuring the passage of the service word Marriage for lack of response in the response CMB (in the case of in the respondent’s CSS).

Then the CVM requestor issues a case. The start word and repeats the exchange with the subscriber.

The software restarted mode of the computing complex from centralized to decentralized and back is carried out using the service word Mask, which can be entered into block 14 of any of the digital computers. At the same time, after the signal arrives at all interfaces of the communication system, the Initial or after the End of the next exchange session and issuing the control word to the digital computer-receiver. The end of the digital computer exchange (any given by the program) forms and issues the service word Mask with the set address (digital computer , CSS),. who do not have to interview.

The address portion of the specified overhead word at input 30 enters register 29, decoder 34, and the signal from the output of this decoder is stored on trigger register 35, blocking the input of the corresponding encoder 25.

The addresses of the complexes specified in the interrogation service word are formed and cyclically rendered using the generator 27, the synchronization node 28, the counter 36, the decoder 23, and the OR 26 elements.

When all addresses except one are masked, the digital computer to which the unmasked address is assigned becomes central (it is given the highest priority), Centralization (assignment of the highest priority) of the digital computer group to the other group is possible by masking part of the address (digital computer) with the priority discipline of service in the order of polling within these groups.

The technical and economic advantage of the proposed device in comparison with the known ones consists in the operative detection of possible failures or malfunctions of the device for interfacing them with the information exchange channels of digital computers and in increasing the efficiency of the digital computers group.

the invention

Formula

Interface device according to auth. 777655, characterized in that, in order to expand operational capabilities through prompt detection of faults or malfunctions, a timer and a zero signal generator were inserted into the device, with additional decryption outputs connected to the control inputs of the timer and the first input of the zero signal generator, the output of which is connected to the device zeroing output, the first output of the sync pulse generator is connected to the clock input of the timer, the output of which is connected to the auxiliary input of the service layer encoder in and out with the second zero-forcing input.

Sources of information taken into account in the examination

1. USSR author's certificate 777655, cl. G 06 F 3/04, 07/17/78 (prototype).

Claims (1)

Claim Device for pairing on autosw. No. 777655, characterized in that, in order to expand operational capabilities due to the operational detection of failures or malfunctions, a timer and a zero signal driver are introduced into the device, and additional decryption outputs are connected to the timer control inputs and the first input of the zero signal generator, the output of which is connected to device zeroing output, the first output of the clock generator is connected to the clock input of the timer, the output of which is connected to the auxiliary input of the service layer encoder and to a second input of the reset signal.