SU962906A2 - Interface - Google Patents

Description

The invention relates to computing technology and is intended for interfacing digital computers to a computer system.

According to the main auth. 896613 a device for interfacing, containing a communication unit with a machine, the first input and output of which is a machine input - device output, the second input and output are connected respectively, with the first output and input of the accumulator, the second and third outputs and the second input. - respectively with the first and second, inputs and the first output of the control unit, and the third input - with the first output of the cipher of the service words, converts the parallel code into a serial one, the first - the fourth inputs and the first and second outputs of which are connected respectively to the second output of the accumulator, the output of the request code register, the second output of the auxiliary words encoder, the first output and input of the clock generator and the first input of the translation unit, the first output of which is connected to the first input of the serial code converter to the parapleg (Ё1й, second INPUT and output respectively, to the first output of the clock generator and the first input of the decryption unit, the first, second and third outputs of which are connected respectively to the third input of the control unit and the first and timer inputs and signal shaper zeroing ,, yield

10 connected to the output of zeroing the device, and the second input - to the output of the timer and the first input of the encoder of tracking words, the second input of which is connected to the second inputs

15 accumulator, clock generator and decryption unit, first by the polling unit input and the first output of the control unit, the second and third outputs connected respectively to the second and third inputs of the polling unit, and the first output and the second input of the request code register The output of which is connected to the third input of the decryption unit, and the fourth input of the polling unit, the output of which is connected to the fourth input of the decryption unit, the first output of the sync generator 30 pulses, is connected to the input m timer.

and the second output and the third input, respectively, with the input and output of the bit counter, the second and third inputs and outputs of the translation unit are respectively the first and second inputs and outputs of the device. In addition, the polling unit contains a subscriber address decoder, a subscriber address coder consisting of a group of coders, elements of an OR group, a pulse generator, a synchronization node, a register, a may register, a mask de-cipher, subscriber register and counter 1.

A disadvantage of the known device is low reliability, since it lacks control of the communication channel in standby mode, when the system is turned on and the polling unit is functioning, sending service words. The line is polled, and information is not exchanged between digital computers in the system. The malfunctions that occurred in this mode in the communication channel are not timely detected. Operational software monitoring by exchanging test information can be performed only sporadically, while the efficiency of using the system's digital computer decreases. Continuous assessment of the state of the communication channel with this kind of monitoring is also absent. The purpose of the invention is to increase the reliability of the device.

The goal is achieved by introducing a display unit and a communication channel state analysis unit, including a synchronization node, a counter and a trigger, with the first and second inputs of the synchronization node being connected respectively to the first outputs of the clock generator and the decryption unit, the first and second outputs - respectively with the first and second inputs of the counter ,. and the third input is with the Initial input on powering up the device, the third input of the counter and the first input of the trigger, the first and second outputs of which are connected respectively to the inputs Norm and Marriage of the display unit, and the second input to the output of the counter.

Figure 1 shows the structural scheme of the multi-machine system and the block scheme of the device; 2 and 3 are functional diagrams of a polling unit and. control unit.

The system contains interface devices 1, connected by machine inputs-outputs 2 and 3 to the corresponding digital computers, and inputs and outputs 4 and 5 to the communication lines 6 and 7. 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.

polling unit 14, counter 15 bits, drive 16, converter 17. parallel code to serial, serial code to parallel converter 18, block

19, a timer 20, a zeroing signal generator 21, a link state analysis unit 22, and an indication unit 23.

Block 14 of the survey (figure 2) contains

0 subscriber address encoder 24 consisting of encoder group 25, group elements OR 26, pulse generator 27, synchronization node 28, mask register 29, first control

5 input 30, the second and fourth inputs 31 (stop) and the third input 32 (start) of the polling unit, the output 33 of the polling unit, the decoder mask 34, the register 35, the counter 36 subscriber and the decryptor 37 of the subscriber address.

Figure 1 also denotes zeroing output 38 of the device, synchronization node 39, counter 40 and flip-flop 41, lamp 42. Norm and lamp 43

5 Rejection of the display unit 23, inputs 44-46 of the synchronization unit 39 and inputs 47 and 48 of the display unit 23, inputs 49-51 and outputs 52-54 of the control unit 9.

The control unit 9 (FIG. 3) performs information exchange control functions and comprises a drive control node 55, an interrupt register 56, a micro-operation register 57, a control signal generator 58, a device interchange information device (PC) with a digital computer, a service driver 59 Words of Receipt.

Node 55 consists of counter 60

0 words, counter B1, the number of complete macros, trigger registers 62 and 63 to switch 64.

The device works as follows.

5, the exchange computer system exposes the control word through block 8. The query to the register 11 contains the addresses assigned by the digital computer and device 1 for conjugation (CS) of the interrogator and responder, command code, sign of the service word.

In one (any) of device 1, block 14 is turned on, which cyclically interrupts service words Interrogation, performed a sequential interrogation of registers 11, started on from the first CSS, by successively changing the addresses of subscribers in these service words. In this case, each set (digital computer and US) is preassigned with the address using the switches of block 13, which analyzes the addresses and service words.

When polling register 11, the word Query is being read on lines 6 and 7 of communication through converter 17 and block 19. The responder service station to which the Request is addressed, receives the Request via block 19 and converter 18, performs ananalysis of the word sign. command code and address and, in the case of a Request for belonging to a given class, 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 block 13 decrypting the interrogator's devices, where it is decrypted, and the signal from the output of block 13 starts counting the time on timer 20. Timer 20 is preset for a time longer than the longest exchange session. After receiving the request, the responder, in case of unavailability for the exchange, issues the service word Zan to the address of the interrogator CMV, which is similar to other service words via communication lines, and then enters the interrogator CVM via the service word channel. In addition, the service word is deciphered by the decryption unit 13 for interrogating the interrogator, and the signal from the output of this block stops counting the time in timer 20 and sets it to its original state. Then, the central requestor Eats out the Start word:, block 14 launch. If the Responder is ready to exchange, upon receiving the Request, it issues the response word to the requestor's DVR, which is transmitted, processed in the same way as other service words, and is sent to the DVR-interrogator in interrupt signal. After receiving the Answer, the exchange between the pair of specified digital computers is considered to be established, and the digital requestor provides the control word array to the second responder. The remaining digital computers of the complex do not exchange information at this time. The array of control words transmits from in lines 6 and 7 of the communication through the information channel of the requester US: input 2, block 8, block 9; drive 16, the Converter 17, block 19; In this case, part of the words of this array are used to set up block 9, fixing in it the amount of information transmitted 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. Block 9 generates a signal in the digital computer to stop the exchange and organizes the output of this array in line 6 and 7 of communication via drive 16, converter 17, block 19. When issuing information and service words, generator 12 and counter 15 are used, which counts the information bits in the word From lines 6 and 7 of the communication, the array of control words is fed to the Response Center on the information channel of the US-responder; block 19, converter 18, block 9, accumulator 16, block B, output 3. At the same time, block 9 is configured and generated as a signal to resume exchange with a digital computer via a chain of blocks 9.8 and output 3. Similarly to an array exchange the control words exchange the macros of the information array, with the increase in the exchange rate achieved by simultaneously recording one macro word from the DVR transmitter into the storage 16 of the US transmitter and reading into the CVM receiver of another macro word from the storage 16 of the RS receiver. For example, the DVR transmitter transmits the first macro word to the drive of the US transmitter. After filling the accumulator, the DVR transmitter interrupts the exchange. Then the first macro is pumped to the drive of the US receiver. After filling in the US receiver drive and cleaning the US transmitter transmitter with signals from blocks 9 of these CSS, a second macrosword is recorded. Into the US transmitter transmitter and read the first macrosword from the receiver's accumulator. After recording the second macro-word, the transmitter-transmitter control unit generates a readiness signal for issuing the second macro-word to the responder. After reading the first macro word, the US receiver, using the control unit and the encoder 10, generates and issues the service word Receipts to the US transmitter. By coincidence of the receipt of this service word and the readiness signal for issuing macro words, the US transmitter 9 unit 9 organizes the delivery of the second macro word to the US receiver. The exchange with such a construction of the system is possible both as individual words and with any given number of macros. The formation of test bits, the control modulo 2 and the checksum B1 is decomposed onto a CVM system. If an error is detected in the transmitted information, the DVR receiver forms and issues the auxiliary word Marriage, and the exchange session is repeated. After the end of the exchange session, the DVR receiver issues a service word. The end of the exchange, which is entered into the US interrogator block 13, 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 block 1.4. Request If, after issuing the inclusion of timer 20, the response service words Zan It or End of Exchange do not arrive in the USE controller, timer 20 does not arrive after the countdown time expires, the signal first to the driver 21, and then to the encoder 10, which forms the service layer Marriage for no reaction. The shaper 21 sets the zeroing signal, which arrives at output 38 and sets all US-E aproschka units to their initial state, ensuring the passage of the Marriage for No Response word to the interrogator's CVM (in case of a failure to the US interrogator). Then, the interrogator CVM issues the service word Marriage due to lack of response to the respondent CVM via the control word channels of the requestor, the service line and the communication line, similar to transferring others from worse sinks. After this service word enters the US responder unit 13, the unit 13 organizes, via the former 21, 38, the installation of the responder US service units to its original state, ensuring the passage of the non-response Marriage word to the respondent's CVM (in case of a response to the US responder ). The DVR-e-aproschik then issues the Start service word and repeats the exchange with this subscriber. The mode of programmatic reorganization of the computing system from centralized to decentralized and back is carried out using the service word Mask, which can be inserted into block 14 of any of the DVR complex. At the same time, after the signal is received by the entire system in the Initial System or after the end of the next session of the exchange and the reception of the control word by the CMV receiver, the end of the exchange of the digital computer (any, specified on the program1 OI) forms and issues the control word Mask with the set address (CVM , CSS) that should not be queried. The address part of the specified Service Word at input 30 enters the register- | 29, is decoded by the decoder 34, and the signal from the output of this decoder is stored on the register 35, blocking the input of the corresponding chi-frator 25. The addresses of the sets specified in. polling, are generated and cyclically generated using generator 27, synchronization node 28, counter 36, decoder 37, encoder 24, and OR elements 26 when all addresses except one are masked, the digital computer that is assigned an unmasked address becomes central (she is assigned a higher prioritGet). It is possible to centralize (assign the highest priority) a group of digital computers with respect to another group by masking part of the addresses (digital computers) with equal priority service discipline in the order of polling within these groups. The transition of the system to the standby mode of the communication channel is carried out after turning on the power of the system, through which it is formed and enters the communication condition analysis unit 22 via input 46, the Initial signal on powering up and starting the polling unit 14 (in any of the devices system mates). At the same time, the initial power-on signal arriving at the synchronization node 39 blocks the flow of signals from the generator 12 clock pulses. To the input of the counter 40, wraps the counter 40 and sets the trigger 41 to the initial state. At the display unit 23 the Normal indicator lamp 42 lights up. Block 14 is started manually from the button on block 14, or by feeding from any of the digital word of the Start word. In this case, the polled word Poll comes from lines 6 or 7 of the communication via b. Poks 19, 18, 13 to input 45, if block 14 of the poll included not in the considered CSS, or from polling block 14 via block 13 to input 45, if block 14 is turned on in the considered CSS. Upon receipt of a signal polling from the output of block 13 to input 45, the synchronization node 39 and counter 40 are reset, and then node 39 is turned on, and the counter begins to fill with pulses coming from the output of the generator 12 sync pulses. The filling time of the counter 40 in this case should be much longer than the period of arrival of the service words Polling and exceed the time of the longest communication session. If this condition is met, there are no malfunctions in the communication channel and the system is functioning correctly, overflow of the counter 40 does not occur, and the indicator lamp 42 Norma is constantly on. In the event of a fault in the communication channel, the flow of signals is interrogated. Interrogation to the unit 22 of the corresponding MS, the counter 40 overflows and switches the trigger 41 to the state. At block 23

The lamp 43 lights up, which indicates the presence of a fault in the communication channel.

. It should be noted that the control covers those sections and nodes of the communication channel, through which, with a given connection of the US and the activation of the interrogation unit, the service words Interrogate are received,

By alternately turning on the polling units 14 in the MS, located at the ends of the communication line, full control of the communication lines and a number of nodes of each CSS is provided.

The control unit 9 operates as follows (FIG. 3).

In the transfer of service words from the digital computer via the device, the service words Zanto, Answer, End of exchange, Marriage, Mask and Start are sent to input 57 in register 57, which distributes and issues control signals generated from the service words.

At the same time, the service words Zanto, Answer, End of Exchange, Marriage, Mask and Start issued to the communication line are received from the output of register 57 through output 52 to block 10, where the format of the service words is converted to the format received in connection.

The service words Start and Mask, intended for use in the US transmitter of service words (in the case of polling unit 14 operation in the US transmitter), are output as a signal (Start) on output 5 to start block 14 and on output 52 (Mask) to control block 14 when setting the priority for information exchange in the digital computer system.

In the mode of transferring official words from a communication line through a CSS to a digital computer (a US receiver of service words), the service words Zanto, Answer, End of exchange, Marriage, and interrupt signals from the output of block 13, containing the decoder of the sign of the service word or information, command code and the addresses are received at input 51 in registers 56 and 57, and then issued to the digital computer at output 52.

. In the mode of transferring the service words Start, Mask from the communication line, the indicated service words arrive through block 13 without analyzing the destination address (since only one polling block 14 can be switched on at a time in the system).

In block 9, the generation and issuance of control signals for these service words is carried out as described above.

In the mode of transferring an array of control words (MUS) and macro-information from a digital computer via a CSS to a line

communication information is fed to the input 49. In this case, a few words of the ICC are used to configure the drive control unit 55. The first word, which determines the number of words in the ICC, as an additional code (setpoint) enters the trigger register 62, and then is transferred to the word counters 60. The counter 60 serves to select the addresses of the cells of the pit 16 when writing and reading information. The second word of the ICC, which determines the number of words in the last incomplete macro word of information, is entered in the form of an additional code in the trigger register 63.

5 When reading and reading this macro information, register 63 is transferred to counter 60.

The third word of the ICC is entered into the counter 61, which serves to count the number of specified full macros.

The switch 64 controls the setting of the settings in the registers and the counter 60 at the required time points (with

5 write and read information) and into the counter 61 controls the feed of the counting pulses to the input of the counter 60 and the output from the register 62 of the first word of the ICC on the output 52 to the accumulator 16 at the moment of setting the counter 60 on the first word. Starting from the second word of the ICC, the counter 60 controls the writing of information to the drive. The overflow signals from the counter 60 and 61 are sent to the formers 58, 59, which serve respectively to form and output on the output 52 the signals of the beginning and the end of the exchange of information by the US

0 condition of readiness of the digital computer for the exchange of information after the reception or import of the service word Answer, when the connection between a pair of digital computer is considered established) and a service word

5 Receipts.

In the transfer mode of the ICC and the macros, information from the communication line through the CSS in the digital computer unit 9 functions as described above with the

0 by the difference that the information is transmitted without conversion through block 13 and enters block 9 via input 51, and is output to a digital computer from another output of accumulator 16. The direction of exchange of information is selected by register 57, which switches the output of the accumulator to one of the two. directions (issuance in a digital computer or in a communication line),

0

The determination of the direction of the exchange is made by analyzing the direction of the arrival of the response word (input 50 or 51).

In the mode of issuing service layer5. va Poll from US to line

The specified word is formed by a polling unit 14 of this CD, transmitted via the circuit: output 33, block 13, input 51, block 9, output 52, register 11 or block 10 (depending on the address of the polling destination) converter 17, block 19.

In the transfer of the service word Interrogation from the communication line to V, the specified word enters the circuit: block 19, converter 18, block 13, input 51, block 9, exit 52, register 11.

Thus, the proposed device allows operative continuous monitoring of the communication channel of a group of digital computers in standby mode, when the system is turned on and information is not exchanged between digital computers in the system:

Such control complements operational hardware control (control by no reaction) and operational program control (by exchanging test information, as it is done at the time when these types of controls do not work. This ensures timely detection of failures and increases the reliability of the device.

Claims (1)

Invention Formula Interface device according to auth. 896613, characterized in that, in order to increase the reliability of the device, an indication block and a link analysis block are inserted into it, including a synchronization node, a counter and a trigger, with the first and second inputs of the synchronization node being connected to the first outputs of the generator sync pulses and a decryption unit, the first and second outputs, respectively, with the first and second inputs of the counter, and the third input with input cm. Initial for powering on the device, the third input of the counter and the first input, trigger, the first and second outputs which are connected respectively to the inputs Norm and Marriage display unit, and the second input to the output of the counter. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 896613, cl. G 06 F 3/04, 1979 (prototype). oJJ