SU1282146A2 - Interface for linking computer with bus - Google Patents

Abstract

The invention relates to computing, can be used in multi-machine computing systems and is an improvement of the known device according to the author. St. No. 907536. The purpose of the invention is to expand the class of tasks of the device by ensuring recognition of faulty situations in the information exchange process. The goal is achieved by the fact that a transmission time control block and a mode setting and indication block are entered into the device. The transmission time control block contains two access triggers, a fault trigger group, an OR element group, two word counters, a time counter, two computer number decoders, two computer number registers, a generator, five AND elements, an OR element, and an NOT element. 1 hp f-ly, 8 ill. (L

Description

The invention relates to computing, can be used in multi-machine computing systems and is an improvement of the device according to the author. St. No. 907536.

The purpose of the invention is to expand the class of tasks of the device by ensuring the recognition of faulty situations in the process of information exchange.

FIG. 1 shows a diagram of a device for interfacing a digital computer with a common highway; in fig. 2 is a block diagram of an analysis of the state of an intermachine exchange highway; in fig. 3 is a timing diagram of the issuance of control words in FIG. 4 and 5 is a diagram of the synchronization unit and the timing diagram of its work, respectively; in fig. 6 is a control block diagram; in fig. 7 - control unit diagram; in fig. 8 - control panel diagram.

The device (Fig. 1) contains a block

1 analysis of the state of the highway unit

2 controls, synchronization block 3, current address counter 4, word count counter 5, information register 6, transmitters 7, receivers 8, transfer time control block 9, mode setting and indication block 10, trunk information bus group 11, control bus group 12 bus, bus 13 and 14 priority, input bus 15 device request, output bus 16 start the machine-to-machine exchange (MMO) device, input bus 17 device response, output tires 18 and 19 control signs of the device, input bus 20 polling the device, bus 21 behind ishi in counters, the bus 22 writing to the register information bus 23 issuing

from the information register, bus 24 signs of the end of the array, bus 25 and 26 synchronization of the first and second control words, bus group 27, the number of words of the digital sensor (DVMd.), bus group 28 of the number of slot of the DVR receiver (DVMpr.) bus 29 current time, a group of tires 30 fault-digital computer, tire 31 reset control unit, bus 32 reset triggers failure, bus 33 end of the transfer time array, bus 34 reset the trunk.

The block t of the analysis of the state of the highway ensures the memorization of the sainpo on the MMO, the analysis of the state of the MMO information bus (Free or Zan) and, when it is idle, the generation of a signal to start the control program in the CVM sensor to prepare the MMO and occupy the MMO highway for this exchange.

The control unit 2 is designed to generate control signals, ensuring 1x operation of the entire device.

The synchronization unit 3 provides synchronization of the clock grids of the digital computers between which information is transmitted.

Counter 4 of the current address and counter of 5 words determine the initial (flow; i) address and the number of words of the transmitted array. Register 6 of information provides intermediate storage of transmitted information. The group 7 transmitters provide connection of digital computer numeric tires to the information highway 11, and group 8 receivers connect the control unit 2, counters 4 and 5, information register 6 and control unit 9 to this trunk. The transmission time control unit 9 provides for counting the transmission time of the array and, if it is exceeded, it records the failure. This determines the number of DVMd. and DVMpr. and the number of words of the information array transmitted between them.

The unit (console) 10 of setting the mode- and indication provides an indication of faulty digital computers, the number of array words transmitted between them, the transmission time of the array.

The controls of unit 10 allow to reset the apparatus of unit 9 and ensure that the MMO highway is brought to the Free state.

FIG. 1 is indicated by the dotted line of a digital computer that is connected to the MMO trunk by means of a device.

The trunk condition block 1 (Fig. 2) contains triggers 35-38, elements AND 39-41, elements OR 42, element NO 43, element 44 delay, receivers 45-47, transmitter 48.

The synchronization unit 3 (FIG. 4) contains a generator 49, a pulse distributor 50, a trigger 51, elements AND 52-57, elements HE 58, .59, element OR 60, transmitters 61-63, receivers 64-66, inputs 67 , 68.

312821464,

The control unit 2 (Fig. 6) contains a constant potential, will generate a comparison circuit 69, the triggers 70 are given at the input On. generator .. Section 73, shaper 74 pulses, elements I. 75-86, shaper 87 im5

pulses, element OR 88, receivers 89-93, transmitters 94-96.

The transmission time control unit 9 (FIG. 7) contains triggers 97 and 98, triggers 99-100 group faults, counters 101 and 102 of the word count, time counter 103, decoders 104 and 105 of the computer number, registers 106 and 107 of the computer number (. and TsVMpr., respectively), generator 108, elements AND 109-113, element OR 114, elements OR 115 and 116 of the group, element NOT 117 (receivers for connecting the unit's equipment to the information and control main of the MMO are not readable).

Block 10 (Fig. 8) contains a display with elements 118-125 of indication, buttons 126-127, a toggle switch 128, a single pulse shaper 129, a transmitter 130. In addition, the display contains indication lamps and resistors.

The computing system integrates a group of digital computers, each of which is connected to the control and information buses of the common trunk using the proposed device (MMO channel).

The device works as follows.

The synchronization of the computer digital computer is provided by blocks 3 and consists in combining the clock grids of the digital sensor and the digital receiver.

Placing the device with the generator turned on in the middle of the trunk allows reducing the discrepancy time of the clock grids of synchronized digital computers associated with the delay of clock pulses on the control highway cables. Generator 49 is formed

The two series of clock pulses GI1 and GI2 that are shifted one relative to the other by half the period, which, through the elements 52 and 53 and the transmitters 61 and 62, extend onto the respective control bus lines 12 in the presence of an On signal. generator at the entrance of the block. Through the receiver 64, the pulses GI1 arrive at the inputs of the distributors 50 of all devices indirectly. GI2 pulses arrive at the pulse distributors through receiver 65, element 57 and element OR 60, if the digital computer does not participate in the MMO or is an information sensor, and through elements 55 and 56, and element OR 60, if the digital computer is a receiver of information.

If the digital computer is an information sensor, from block 2 to synchronization block 3, an On signal is output. p. control, in which the control strobe, which is formed on the trigger 51, through the element 54 and the transmitter 63 is transmitted to the corresponding control bus, the trunk 23 is open. It should be noted that all distributors 50 form even pulses from the GI2 series, and odd pulses from the GI1 series. If after submission to the distributor 50 pulse GIG

histral) constant potential, given at the input On. gene ..

Placing the device with the generator turned on in the middle of the trunk allows reducing the discrepancy time of the clock grids of synchronized digital computers associated with the delay of clock pulses on the control highway cables. Generator 49 is formed

two series of clock pulses GI1 and GI2 that are shifted one relative to the other by half the period, which, via elements 52 and 53 and transmitters 61 and 62, reach the corresponding control buses 12 of the line in the presence of an On signal. generator at the entrance of the block. Through the receiver 64, the pulses GI1 are fed to the inputs of the distributors 50 of all devices directly. GI2 pulses arrive at the pulse distributors through receiver 65, element And 57 and element OR 60, if the digital computer does not participate in the MMO or is an information sensor, and through elements 55 and 56 and element OR 60, if the digital computer is a receiver of information.

If the digital computer is an information sensor, from block 2 to synchronization block 3 an on signal is output. page control, through which the control strobe, formed on the trigger 51, through the element 54 and the transmitter 63 is transmitted to the corresponding control bus of the line. It should be noted that all distributors 50 form even pulses from the GI2 series, and odd pulses from the GI1 series. If after submission to the distributor 50 pulse GIG

The distributor 50 and the trigger 51 of the mode 40 and the formation of the corresponding are embarrassedly introduced into the composition of block 3 for a more intimate representation of the operation of the block. Typically, the pulse distributor 50 and the trigger 51 are located in the control unit of the digital computer, since this reduces the number and length of electrical connections between the pulse distributor and the elements of the digital control device. The connection of the clock outputs of the distributor 50 pulses to the digital computer is conditional. not shown. ,

Synchronization signals are transmitted over the GGG, GI2 and Page buses. The control unit is a part of the tire group 12 of the control line Upr. IMO.

The generator 49 is turned on only in one MMO (on average, on the accounting clock pulse, the arrival of the next pulse GII2 is delayed, then the duration of the last clock pulse at the output is determined by the moment of arrival of the next pulse GII2.

Let us take a closer look at how synchronization of clock grids of two digital computers is carried out.

In the digital computer, the distributor 50 generates eight output signals TI1-TI8 from the input series of GIG and GI2 pulses (Fig. 5). The two output signals of the distributor 50 (in this case, TIG and TI5) are fed to the inputs of the flip-flop 51, the output of which is a page. 1-5. Suppose that at the moment when the command is sent to synchronize the DVR. and DVMpr. distributors 50 operate in such a way that TH1 TsVMd. matches with ТИ5 ЦВМпр. (Fig. 5). Formation in TsVMpr. pulse TI5 signal from the output of the trigger 51 and page. Ex.-1-5 through the element NO 59 on the elements 55 and 56 blocks the arrival of two pulses GI2 at the input of the distributor 50. Thus, the duration of the pulse GI5 is equal to two periods of the pulse GI1. After this, the blocking of GI2 pulses is removed from the AND 55 element.

ten

In order to synchronize requests for MMs, at the terminal on the trunk for the MMO, a strobe page is formed, cviHxp, which is transmitted through the transmitter to one of the buses 12 of the trunk (not shown).

A request for an IMO is generated by the DVMD. and is fed to the input of the trigger 35, which captures this request, and the front edge of the page sync. rewritten to trigger 36. The trailing edge of the signal. p. sync in the absence of requests in the highest priority digital computers (on bus 13, allowing

strobe pp. ex. and at the input the distribution potential is 5) and provided that the intermachine trunk is free (at the time of the receiver 46 the permitting power) through the element AND 39 the request is rewritten into trigger 37, and then

the divider 50 receives the next impulse GI2, with which the formation of the impulse TI5 ends, the impulse TIB and all subsequent, and from that time the clock grids TsVMd are formed. and DVMpr. match, i.e. machines work synchronously. In synchronous operation, the pulses GI2, which form the output signals TIb and TI8, arrive at the input of the distributor 50 through the elements AND 55 and OR 60, and the impulses GI2, which form the signals TI2 and TI4, through the elements And 56 and OR 60.

The mismatch of the clock grids pulse distributors TsVMd. and DVMr., caused by the failure, is eliminated automatically without the operator and nporpaMNJbi.

The initiator of machine-to-machine exchange can serve as TsVMd., TsVMpr, and external devices.

In TsVMd. the initiator is the program. TsVMpr. and external devices, if necessary, generate signals for the MMO request. We are considering an option when the initiator of the IMO is, eV, TsDMd.

When organizing an IMO, there may be conflicts caused by a simultaneous request for an IMO from two or more digital computers (or VU), at the time when the MMO main line

the machine line is free (at resolving potential of the receiver 46) through the element AND 39 the request is rewritten to trigger 37, and then

20 to trigger 38 (machine-to-machine state). At the output of the trigger 37, a signal is triggered by the start of the MMO (Interrupt type), which enters the digital computer via the bus 16, and the trigger 38 via the transient

25 gauge 48 installs on the bus Sos Master. MMO potential corresponding to Zan ta.

After the transition of the digital computer to the control program for the preparation of devices for

30 MMO from TsVMd. bus 17 is signaled. Request is accepted, which flushes trigger 37.

The training program for MMO devices provides a record in the counters 4 and 5 of the current address and the number of words of the starting address and the value of the transmitted array DVMd. and DVMpr. and imitation of the request for issuing the first word from the DVMd. in TsVMpr. Record in counters of each TsVMd. and DVMpr. produced by two output operations. In the first operation, the first control word US1 is introduced into the second - the second control word 45 in US2.

The individual digits of the first control word determine the number of the digital computer into which the second control word is transmitted to the MMO channel, the sign

35

40

busy Such conflicts in the IMO channel 50 (determined by a digital computer by a sensor or receiver of information) and a synchronization feature (the need for synchronization of a digital computer exchanging information is determined). The second control word contains (The starting address of the array of information and the number of words in the array. The control words from the digital computer through a group of transmitters 7 are issued per group

are solved by block 1. All blocks 1 are interconnected by a priority priority, with bus 13 being the input of block 1 from the highest priority digital computer, and bus 14 being the output bus for the lower priority digital computer.

Thus, the extreme left digital computer has the highest level of priority, the extreme right of digital computer has the lowest.

In order to synchronize requests for MMOs, a strobe page, cviHxpV, is formed at the terminal on the trunk for the MMO, which is transmitted through the transmitter to one of the trunk buses 12 (not shown).

A request for an IMO is generated by the DVMD. and is fed to the input of the trigger 35, which captures this request, and the leading edge of the signal St.Sync. rewritten to trigger 36. The trailing edge of the signal. p. sync in the absence of requests in the highest priority digital computers (on bus 13, allowing

potential) and provided that the machine trunk is free (the resolving potential at the output of the receiver 46), through the element 39, the request is rewritten into trigger 37, and then

trigger 38 (machine-to-machine state). At the output of the trigger 37, a signal is triggered by an MMO trigger (of the Interrupt type), which enters the digital computer via the bus 16, and the trigger 38 via the transmitter 48 installs on the bus Comp. master. MMO potential corresponding to Zan ta.

After the transition of the digital computer to the control program for the preparation of devices for

IMO from TsVMd. on bus 17, a signal is received. The request is received, which triggers trigger 37.

The training program for MMO devices provides a record in the counters 4 and 5 of the current address and the number of words of the starting address and the value of the transmitted array DVMd. and DVMpr. and imitation of the request for the issuance of the first word from TsVMd. in TsVMpr. Record in counters of each TsVMd. and DVMpr. produced by two output operations. In the first operation, the first control word US1 is entered into the second - the second control word US2.

The individual digits of the first control word determine the number of the digital computer into which the second control word is transmitted to the MMO channel, the sign

50 (determined by the digital computer sensor or receiver of information) and the synchronization feature (the need to synchronize digital computers exchanging information is determined). The second control word contains (The starting address of the array of information and the number of words in the array. The control words from the digital computer through a group of transmitters 7 are issued per group

7

information tires 11 Inf. №10 highway.

The control words are accompanied by the sync signals of the ALS and Sync USL2 signals issued from the digital computer via buses 25 and 26 for a group of buses 12 Ex. Signal MMO trunks (transmitters of synchronization signals are located in the digital computer and not shown in the drawings).

The time diagram for issuing control words is shown in FIG. 3, With the Service 1, the number of the digital computer through the information buses 11 of the trunk enters the control units 2 of all the MMO systems of the system (to the comparison circuit 69). In the second group of inputs of the comparison circuit 69, the number of the corresponding digital computer is set.

In the digital computer selected for the exchange, the numbers are compared, and from the output of the circuit, the trigger 70 is set to one and then one of the clock pulses TI to trigger 71, the potential from the output of which allows the reception of the digital criterion and the synchronization symptom to trigger 72 and 73, respectively. From the outputs of the flip-flops 71 and 72 on the terminal I 75, a PCVMd-pr signal is generated. which, entering the digital computer determines the input or output of the array, the selected digital computer will work. The output potential of the trigger 73 on the element 86 is generated and a signal is turned on. The control panel, which, entering block 3, connects a control strobe gate to one of the bus lines 12, control block, on the And 85 element, an On signal is generated. sync., which, entering block 3, provides synchronization of the clock grids D / C d. iCVMpr. When US2 is outputted to block -2 by the selected element 79 And I and by the generator 87, the PMS MMO signal is generated, which ensures that the starting address and the value of the array of information transmitted between the selected digital computers are written to counters 4 and 5. After preparing the channel IMO DVMd. and DVMpr. the program TSVMd. A bus is sent to the bus 12 of the signal. A request to the DVMd (the signal's signal circuit is not shown), through which AND 84 and OR 88 elements form the Request Ib-B signal, which, entering the CMV, stops its operation for one cycle, and from the cell RAM whose address is recorded D6 8

San in counter 4, the first word of the array is entered. Issued from TsVMd. the information word is accompanied by the IMO Interrogation D-Pr signal, according to which the Request TSVMpr signal is generated on the I 82 element. The latter, via transmitter 96, is outputted to one of the lines 12 of the highway, and a sync signal is generated on the And 77 element. inf. An IMO which, via transmitter 94, is output to the corresponding bus 12.

Reception of information in the channel MMO TsVMpr. is produced on register 6 by a PCRgMMO signal, formed in a block, 2 DVRs. on zlemente I 80 from signal Sinhr.inf. IMO, Simultaneously signal Request to TsVMprp. through the receiver 92, the elements And 83 and OR 88 enters TsVMpr. as a signal Iv-In Request, causing suspension of the DVMr program. At the same time from TsVMpr. an MMO Poll signal is issued; on element 78, a VKRGMMO signal is generated, which is used to read the contents of register 6 of information in RAM CVMpr. at the address specified in the counter 4. At the same time, the same signal through the element And 81 and the transmitter 95 is fed to the corresponding bus 12 of the highway as a signal Request in DVMd. to issue the next word of information from the digital computer.

The change in the status of counters 4 and 5 is performed by the falling edge of the signal. The D-Pr IMO poll.

After transferring the last word of the array of information by the word counter in the TSVMd. and DVMpr. signal is formed End of the array, which equipment channels MMO TsVMd. and DVMpr. reset. From this point on, the exchange between the other computers of the system is allowed.

If during the preparation of interfaces to transferring an array of information or in the process of transferring an array, a malfunction occurs that will prevent the completion of the transfer of the array, then the MMO highway will remain occupied for an indefinite time and the multi-machine system will actually go out of order, i.e. Failure of one of the digital computers or its interface with the backbone makes the computing system as a whole inoperable.

To eliminate this disadvantage, the transfer of each array is put

according to a certain (maximum) time of its transfer. The control of the time of the transfer of an array of information between any two digital computers is carried out by block 9.

When executing any of the digital computers of the control program for the preparation of interfaces to the machine-to-machine exchange in block 9, the trigger 97 is fixed to the symptom DVMd. (the corresponding bit of the Service is gated by the Sync signal US1), and register 106 - the number of the DVH. The trigger 98 fixes the TsVMpr sign, and the 107 register records the TsVmpr number.

In counters 101 and 102 from the information highway 11, the signals of the Sync Usl are taken as the code of the number of the array layer, respectively, CMD. iCVMpr. Simultaneously, through the element 109 and 109, the generator 108 is connected to the counting input of the time counter 103, and the array of information begins to read between the DSMd and TSVMpr, the length of the counter 103 and the frequency of the generator 108 are calculated based on the maximum transmission time of the array of information.

Modification of counters 101 and 102 of the number of words of TsVMd, and TsVMpr. carried out by the request signals in DVMpr. and Request to TSVMd. respectively. Thus, the counter 101 counts the number of words transmitted from the DTMD. and DVMpr., and the counter 102 - the number of words received by D DVMpr.

D1: exceeding the time of transmission of the array of information at the transfer output of the time counter 103, the Reset mag. MMO signal is forced. This signal through the toggle switch 128 (in the automatic mode) returns to the initial state the equipment of the block 9, and in the triggers 99 and 100 the numbers CMV are recorded. and DVR, which were previously decrypted on decoders 104 and 105. The numbers of these DVRs are indicated by the scoreboard of block 10. At the same time, the signal from the output of transmitter 130 via bus 34 goes through receiver 47 to the input of element 41 of all blocks

1, connected to the highway. Only 55 task setting and display unit,

in that block 1, which is occupied by the master, with a group of information inputs

At the second input of the element 411 and the group of synchronization inputs, the permissive level for controlling the time of transmission of the grid is set. Thus, in this blo-dineny, respectively, with the information

ke signal The reset of the MMO mag through the AND element 41 and the delay element 44 sets the triggers 35, 36 and 38 to their initial state, thereby freeing the highway. At the same time, any computer digital system can go out for machine-to-machine exchange.

When debugging the system and working with the control unit 10 in the manual mode after the transmission time of the array has been exceeded, the indication lamps in-) are generated. the number of array words transmitted from the DVMd, the number of array words received in the DVMpr. , -number of digital computers, during which the malfunction was fixed.

Compare the number of words from the TSVMd. and received DVRs, you can identify a faulty DVR.

Trigger 99 and 100 are reset in block 9 by button 126 Resetting non-fault, and releasing the trunk by pressing button 127 Reset master, when closed by which driver 129 generates a signal that goes through the transmitter 130 to the control bus and enters unit 1 analysis of the highway, frees the intermachine trunk.

Monitoring the progress of the multi-machine computing system and managing the common highway can be performed from block 10 of any interface device connected to this highway. This is especially important for systems in which digital computers are located at considerable distances from each other. In the case of 10 units of all digital computers, the Mode switch must be in the Manual position (Fig. 8), which actually disables the transfer output of the time counter 103 from the control highway.

Claims (2)

Formula inventions: and 1, A device for interfacing a computer with a backbone of the autonomous vehicle, no. 907536, characterized in that, in order to expand the class of tasks of the device by ensuring recognition of faulty situations, a transmission time monitoring unit is introduced into it h iminn and upranlnye tires mpgis-gralp, and from the first quarter of the fourth group of informational outputs, the output signal of the end of the transmission time, the general reset input and the reset input of the malfunction of the time control unit, respectively, from the first to the fourth group of indicator inputs, the clock input and the first, second outputs of the mode setting and indication unit, the third output of which is connected to the reset line of the control busses of the line. 2. The device according to claim 1, characterized in that the control unit in the transmission of transmission contains two circulation triggers, a group of fault triggers, two word counters, a time counter, two computer number decoders, two computer number registers, a generator, five elements AND, a group of elements OR, an element OR and an element NOT, and the generator output is connected to the first input of the first element AND whose output is connected to the counting input of the time counter, the reset input connected to the output of the element OR, the first the second inputs of which are respectively connected to the outputs of the transfer of the first and second counters the number of words, information and counting inputs and data outputs respectively connected to .kotoryh groups Informational onnyh and clock inputs and. the first and second groups of information outputs of the transmission time block, the first inputs of the second and third elements I are connected to the sync inputs of the first and second access flip-flops and a group of synchronization inputs of the transmission time control block, the information inputs of the first and second registers of the card number are connected the inputs of the control unit transmission time, information .- .5 - О -5 20 35 40 25 thirty ) f) 1 2 immoblicating periode trio oOpanuv mi and the second input of the second element I and through the PC element with the second input of the third element I and the information input of the second trigger of the circulation, the synchronous inputs of the first and second counters of the number of words are respectively connected to the outputs of the fourth and fifth elements I, the first inputs which are connected to the group of synchronization inputs of the transmission time control unit, and the second inputs, respectively, with the outputs of the first and second access flip-flops, the outputs of the second and third And elements are connected Correspondingly to the synchronous inputs of the first and second registers of the computer number, the outputs of which; are connected respectively to the inputs of the first and second decoders of the computer number, the output groups of which are connected respectively to the first and second inputs of the OR elements, the outputs of which are connected to information inputs the corresponding failure triggers of the group, the outputs of which form the fourth group of information outputs of the transmission time control unit, the reset inputs are connected to the reset input the fault signals of the transmission time control unit, and the synchronous inputs are connected to the Bxoqy of the general reset of the transmission time control unit, the third input of the OR element and the reset inputs of the first and second access triggers, computer number registers and word counters, the output of the second access trigger is connected to the second input of the first And, the information output and the transfer output of the time counter are the corresponding third group of information outputs and the output signal of the end time tol transmission time. „Page sync. t (". , "/ ,, Inf. Sync USL / „Sync. Usl 2 , Pp. control „Bf (/}. Gene er. on p. 67 On CUHJfp. GI1 -JTJTJTJTJTJTJOJlJTJlJT-rLrLrU njTJTJlJTJTJTJTJ JTJTJTJT rLn THt-PTL PTL FIG. five FIG. uzf.ta iz I U, Ne1kpr.ivm, Koliu.S11.TsvMd, (((from hotel.Sl.TSvMprr, time / x oud sh Sch t