SU1325492A1 - Device for interfacing computer with communications line - Google Patents

Abstract

The invention relates to random technology and can be used in telemechanics systems. This device is intended to receive a serial code from a communication line and convert it into a machine word entered into a computer by a parallel code, and vice versa, convert a machine word obtained from a computer with a parallel code into a serial code issued to the communication line. The aim of the invention is to expand the scope. The device contains triggers 1-7, elements AND 8- 15, element AND-NOT 16, group 17 of elements AND, elements OR 18-23, generator 24, shift register 25, counter 26, distributor 27 pulses, decoder 28, element SHSh- NOT 29 and the element NOT 30. 1 Il. (L 37

Description

The invention relates to computing and can be used at controlled points (KP) and control points (PU) of telemechanics systems for receiving a serial code from a communication line and transforming it into a computer word,. entered into a computer by a parallel code, and vice versa, conversion of a machine word obtained from a computer by a parallel code into a serial code issued to the communication line.

The purpose of the invention is to expand the field of application of the device due to the possibility of its use in control points and controlled points of telemechanical systems.

The drawing shows a functional diagram of the device.

The device contains triggers 1-7, elements AND 8-15, element AND-NOT 16, group 17 elements AND, elements OR 18-23, pulse generator 24, shift register 25, counter 26, pulse distributor 27, decoder 28, element OR -NOT 29, element NOT 30, inputs from the microcomputer: Start of exchange 31, Reset device 32; Transfer 33; Reception 34; 10

15

a signal to the input 33, which sets the trigger 6 to one, which indicates that the device is configured to operate in the transmission mode. The enable signal (unit) of the trigger 6 received at the direct output enters the inputs of elements 13 and 14, and the inhibit signal (zero) received at its inverse output blocks the elements 12 and 15. The signal at input 31 sets trigger 1 to unity condition. The signal from its direct output sets the trigger state 2 to one, which permits the passage of pulses from generator 24 through AND 8. At the same time, the signal from the inverse trigger of trigger 1 blocks the AND-NOT element 16, which prohibits the passage of any signal through the AND-NOT element 16 during operation of the device in the first stage.

The first impulse from the output of the element AND 8 sets the trigger 3 to the one state. At the same time, this impulse through the elements OR 22 and I 9 arrives at trigger 4 and sets it into a single state. The same pulse from the output of the element And 9 through the element OR 21 is fed to the output 41. In the pause following the first pulse, received at the output of the element And 8, at the output 41 under 20

25

thirty

40

. writing information 35; Parallel informational 36, Information reading 37J outputs coming in - „microcomputers: Ready to receive 38; Gotoz. It holds signal 1, since one transmission 39, input 40 from the signal line from the direct output signal trig. connection, output 41 into the communication line, pa- P through the elements OR 22 and AND 9 of the parallel information outputs 42 entering the microcomputer.

The device works as follows.

At the first stage, the operation of the device is considered when it synchronizes the input-output of information from the communication line (from other CPs).

At the beginning of information input from the microcomputer to the communication line, input 32 receives a signal that sets the triggers and the device pulse distributor to the initial state.

The inputs 36 receives information from the microcomputer. Then, upon receipt of a strobe signal at input 35, this information is recorded in shift register 25. At the same time, this building signal through the OR element 23 is fed to the reset input of the distribution 27. Next, the microcomputer arrives

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50

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arrive at the input of the element OR 21. The second impulse J received at the output of the element AND 8 sets the trigger 3 to the zero state and at the same time, the passage through the elements OR 22, AND 9 and OR 21 enters the output 41. In the pause of the same pulse At the output of the element OR 22, a signal O is received, since at both its inputs there is a signal O, which through the element AND 9 is fed to the input of the element OR NOT HE. At the output of this element, a signal 1 is generated which sets the trigger 5 to one state.

After the flip-flop 5 is set to one state from its inverse output, the signal O prevents the passage of pulses through the element 9. Thus, at the beginning of the output of information from the device, a pulse — a sync pulse — is sent to the communication line.

five

a signal to the input 33, which sets the trigger 6 to one, which indicates that the device is configured to operate in the transmission mode. The enable signal (unit) of the trigger 6 received at the direct output enters the inputs of elements 13 and 14, and the inhibit signal (zero) received at its inverse output blocks the elements 12 and 15. The signal at input 31 sets trigger 1 to unity condition. The signal from its direct output sets the trigger state 2 to one, which permits the passage of pulses from generator 24 through AND 8. At the same time, the signal from the inverse trigger of trigger 1 blocks the AND-NOT element 16, which prohibits the passage of any signal through the AND-NOT element 16 during operation of the device in the first stage.

The first impulse from the output of the element AND 8 sets the trigger 3 to the one state. At the same time, this impulse through the elements OR 22 and I 9 arrives at trigger 4 and sets it into a single state. The same pulse from the output of the element AND 9 through the element OR 21 is fed to the output 41. In the pause following the first pulse received at the output of the element And 8, the output 41 pod0

five

0

- „. The signal is 1, since the single signal from the direct output of the Tri-P through the elements OR 22 and AND 9

0

- „. The signal is 1, since the single signal from the direct output of the Tri-P through the elements OR 22 and AND 9

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0

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arrive at the input of the element OR 21. The second impulse J received at the output of the element AND 8 sets the trigger 3 to the zero state and at the same time, the passage through the elements OR 22, AND 9 and OR 21 enters the output 41. In the pause of the same pulse At the output of the element OR 22, a signal O is received, since at both its inputs there is a signal O, which through the element AND 9 is fed to the input of the element OR NOT HE. At the output of this element, a signal 1 is generated which sets the trigger 5 to one state.

After the flip-flop 5 is set to one state from its inverse output, the signal O prevents the passage of pulses through the element 9. Thus, at the beginning of the output of information from the device, a pulse — a sync pulse — is sent to the communication line.

the duration of which is equal to one and a half frequency periods at the second output of the generator. The clock pulse is designed to synchronize the operation of the generator input-output information in the gearbox.

From the direct output of the trigger 5 signal 1 through the element OR 20 enters

the input element And 11, thereby the Q next word, and transmitting it to prevent the passage of pulses from the generator 24 through the element 11 to the clock input of the distributor 27, the input element NOT 30 and the shift input of the register 25, at the same time this signal 1 from the output OR 20 is fed to the input element And 12. On pulses arriving at the shift input of the register 25, its contents are shifted

communication occurs as described. If there is no information, the microcomputer sets up the device in the mode of receiving information from the communication line 15. To do this, in the first pause after the last word is transmitted, a signal 1 is sent to the input 34 from the microcomputer, which, through the OR element 23, resets the distribution

and information is bit by bit with follower 27 and through the element OR 18 trig I

thirty

35

Which output through the elements AND 13 and OR 21 enters the output 41 in the communication line. The sequential output of the shift register 25 is gated by pulses from the output of the element AND 8 through the element OR 19. When the entire contents of the register 25 is shifted, the output of the distributor 27 generates a signal 1, which enters the input of the element And 14. Since its input is from the direct output the trigger 6 is already 1, in the first pause after the transfer of the word from the shift register 25 to the communication line, the signal 1 from the output of the element NOT 30 through the element 14 arrives at the output 38 of the device. This signal indicates that the word from the microcomputer recorded in the register 25 is transmitted to the communication line.

If there is information for transferring from the control panel to the control panel in the same pause, the next word comes from the microcomputers to the inputs 36.

After the strobe signal arrives at input 35, this word is written to register 25. This strobe signal simultaneously through the OR element 23 enters the reset input of the distributor 27. Since the pulses from the generator 24 to the input 50 of the HE element 30, the clock input the distributor 27 and the shift input of the register 25 are not terminated; information in the register 25 is shifted. The information is shifted from the serial 55 output of the register 25 through the elements AND 13 and OR 21 arrive in the communication line. Gating the serial output register 25 is carried out

6. The signal O from the direct output of the trigger 6 is fed to the inputs of the elements 13 and 14, and prohibits the transmission of information to the communication line, as well as 25 forming a signal ready to receive on output 38. From the inverse output of the trigger 6, the signal 1 is fed to the inputs of the elements 12 and 15. Since the output of the element OR 20 is signal 1, the passage of information from the input 40 through the element 12 to the serial information input of the register 25 is permitted. At the same time, the signal 1 from the output of OR 20 allows the passage of pulses from the generator 24 through the element And 11 at the entrance ale NOT 30, the clock input of the distributor 27 and the shift input of the register 25. These pulses receive information from the communication line to the register 25. In the first pause after receiving a word from the communication line to the register 25, the signal 1 from the output of the distributor 27 and c element output NO 30 enters the element inputs

And 15. The output of the element And 15 signal 1 is fed to output 39, then to the microcomputer. This signal indicates that one word of information from the communication line is received in register 25. During the same pause, the microcomputer, sending a signal to input 37 through elements 17 and output 42, reads the contents of register 25. At the same time, the signal from input 37 through the element OR 23 enters the reset input of the distributor 27. Entering the next word from the communication line into the microcomputer occurs in the same way as described.

similar to that described. In the first pause after the transfer of the next word, signal 1 from the output of the element NOT 30 through the element 14 and 14 (the other two inputs of this element already have signal 1) enters output 38, then into the microcomputer. With the availability of information for transmitting the microcomputer displays

communication occurs as described. If there is no information, the microcomputer sets up the device in the mode of receiving information from the communication line. To do this, in the first pause after the last word is transmitted, a signal 1 is sent to the input 34 from the microcomputer, which, through the OR element 23, resets the distribution

tel 27 and through the element OR 18 trig I

6. The signal O from the direct output of the trigger 6 is fed to the inputs of the elements 13 and 14, and prohibits the transmission of information to the communication line, as well as the formation of a signal ready to receive on output 38. From the inverse output of the trigger 6, the signal 1 is fed to the inputs elements 12 and 15. Since the output of the element OR 20 has a signal 1, the passage of information from the input 40 through the element 12 to the serial information input of the register 25 is permitted. At the same time, the signal 1 from the output OR 20 allows the passage of pulses from the generator 24 through the element AND 11 at the entrance element that NOT 30, the clock input of the distributor 27 and the shift input of the register 25. These pulses receive information from the communication line to the register 25. In the first pause after receiving a word from the communication line to the register 25, the signal 1 from the output of the distributor 27 and c element output NO 30 enters the element inputs

And 15. The output of the element And 15 signal 1 is fed to output 39, then to the microcomputer. This signal indicates that one word of information from the communication line is received in register 25. In the same pause, the microcomputer, sending a signal to input 37 through elements 17 and output 42, reads the contents of register 25. The simultaneous signal from the input 37 through the element OR 23 enters the reset input of the distributor 27. Entering the next word from the communication line into the microcomputer occurs in the same way as described.

After the reception of the information line is completed, the signal 1 is received from the communication line at input 32 and resets the triggers 1--7 and through the valve 27 sets them to the initial state.

The device in the synchronization mode I / o information works as follows.

At the beginning of the exchange of information, the device in the control station is in the mode of receiving information from the communication line, since the triggers 1-7 are in the initial state. From the inverse of the trigger 1, the signal 1 is fed to the input element AND-NOT 16, which allows the passage of pulses from the communication line to the reset input of the counter 26. The recording of incoming information from the communication line to the register 25 is allowed only when sync pulses arrive. When the clock pulses arrive, the output of the NAND 16 element receives the signal O, and the counter 26 is released from the reset. On doing dim pulses from the output of the generator 24 in the counter 26 is the counting of pulses, more precisely, the counting time. Upon receipt of certain quantities of pulses, a 1% signal is received at the output of the decoder 28, which resets the generator 24 and sets the trigger 7 to one state. The frequency of the pulses received at the first output of the generator 24 is equal to the speed of information exchange between the device and the communication line, and the frequency of the pulses at the second input is selected about 100 times greater than at the first output. When signal 1 is received at the reset input of the generator 24, its first output is reset, and the second output is not reset, i.e. The arrival of pulses at the input of counter 26 does not stop. In this case, counter 26 with decoder 28 performs a discriminator function, which determines the duration of the pulse. If the duration of the incoming pulse from the communication line is less than the duration of the sync pulse, the output of the decoder 28 does not generate a signal 1, however) 1M does not receive information from the communication line to the device.

but it starts the generator 24 with the generator of the input-output device information in the PU.

After the trigger 7 is set to the unified state, the signal 1 from its direct output enters the input of the element AND 10 and also through the element OR 20 enters the input of the element 11 and thereby permits the passage

W pulses from the generator 24 to the input element NO 30, the clock input of the distributor 27 and the shift input of the register 25, and the input element And 12 (at the other input element And 12 already

15 there is a unit) which allows the passage of information from the input 40 of the communication line through the element AND 12 to the serial input of the register 25. The clocks coming from the output of the generator 20 through the element 11 to the shifting input of the register 25 receive the information from the link zi In the first pause, after receiving a single word, on signal 39, a signal appears

25 1 (the same as on all three inputs of the element 15 and there are units) and enters the microcomputer, indicating that one word of information has been received from the communication line to

30 device. After that, the microcomputer at input 37 receives the signal 1, thus the contents of the register 25 through the elements And 17 and the inputs 42 enters the micro computer. At the same time, the signal is read out via the AND 23 element. The distributor 27 is reset. If there is information to receive from the communication line, since the output of the trigger 7 has 1,

40, the reception of successive words is carried out as described.

In the first pause after the end of the reception of the last word of the microcomputer, to the input 33 it sends a signal 1, which sets the trigger 6 to one state. After that, the incoming information from the microcomputer to the inputs 36 is gated with the signal 1 at the input 35, which is written to the register 25. At the same time, the information from the OR 23 element is reset by the distributor 27.

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From the output of the trigger 7, the signal 1 At the end of the clock pulse on you-, through the element OR 20 enters the course of the element AND-NOT 16, the signal of the element 11 appears, resolving the bypass 1, which resets the counter 26, and then from the output of the decoder 28, the signal 1 is removed, which synchronously starts the generator 24 with the generator of the information input / output device in the PU.

After the trigger 7 is set to one state, signal 1 from its direct output enters the input of the element AND 10, and also through the element OR 20 enters the input of the element AND 11, thereby allowing the passage

pulses from the generator 24 to the input element NO 30, the clock input of the distributor 27 and the shift input of the register 25, and the input element And 12 (at the other input element And 12 already

there is a unit) which allows the passage of information from the input 40 of the communication line through the element 12 to the serial input of the register 25. The clocks coming from the output of the generator 24 through the element 11 11 to the shifting input of the register 25 receive information from the communication line. In the first pause, after receiving a single word, on signal 39, a signal appears

1 (the same as on all three inputs of the element 15 there are units) and enters the microcomputer, indicating that one word of information has been received from the communication line to

device. After that, the microcomputer at input 37 receives the signal 1, thus the contents of the register 25 through the elements And 17 and the inputs 42 enters the micro computer. At the same time, the signal Read information through the element 23 and the distributor 27 is reset. If there is information to receive from the communication line, since the output of the trigger 7 has 1,

the reception of successive words is carried out as described.

In the first pause after the end of the reception of the last word of the microcomputer, to the input 33 it sends a signal 1, which sets the trigger 6 to one state. After that, the incoming information from the microcomputer to the inputs 36 is gated with the signal 1 at the input 35, which is written to the register 25. At the same time, the information from the OR 23 element is reset by the distributor 27.

the impulses from the generator 24 to the input element 30, the clock input of the distributor 27 and the shifting

the input of the register 25. Simultaneously, the signal 1 from the output of the trigger 7 is fed to the input of the element And 10 and permits the passage of pulses from the output of the generator 24 through the elements And 10 and i OR 19 to the input of the element And 13. On; the other inputs of the AND 13 element receive signals 1 from the direct output of the trigger 6 and the last output of the register 25. By the clock, the information is transmitted through the element OR 21 to the output 41.

In the first pause, after transmitting the first word, signal 1 appears at output 38 (signal 1 arrives at the inputs of element 14 and signals 1 from the outputs of element HE 30, distributor 27 and the direct output of trigger 6, indicating that the information recorded from the microcomputer to the device is transmitted to the communication line).

If there is information to transfer the microcomputer in the same pause, it displays information to the device. Writing the next words into the register 25, as well as its transfer to the communication line, is carried out in the same way as described.

After the transfer of the last word to the communication line, input 32 receives a signal 1, which resets triggers 1-7 and clears the distributor 27.

KGIS is known, the speed of a microcomputer is 2-4 orders of magnitude higher than the speed of information transmission via telemechanical communication channels of a microcomputer knowingly has time to process signals from outputs 38, 39 and output for transmitting (receiving) the next word during the pause of the pulse sequence received at the first running generator 24.

Claims (1)

Invention Formula A device for interfacing a computer with a communication line, containing eight AND elements, a shift register, three triggers, a group of AND elements, a pulse generator, an OR-NOT element, three OR elements, a NOT element, and a pulse distributor, the installation input of the first trigger being the input of the device for connecting the output of the signal The beginning of the exchange of a computer, and the direct output of the first trigger is connected to the information input of the second trigger, the output connected to the first 50 five 0 five five P The first input of the first element AND whose output is connected to the synchronous input of the third trigger, the reset input of which is connected to the reset inputs of the first and second triggers, the first input of the first OR element and forms the input of the device for connecting the signal output Reset the computer, the third trigger information input is connected to its inverse the output, the outputs from the first to the fifth elements AND are connected respectively to the first inputs of the second element OR, the element OR NOT, the second input of the second element OR, the clock input of the pulse distributor and the serial information input of the shift register, the group of outputs of which is connected to the first inputs of elements AND of the group, the second inputs and outputs of which form respectively the input and output of the device for connecting the output. Reading information and information input of a parallel computer code, parallel information input and information recording enable input the shift register are the corresponding inputs of the device for connecting the information output of the parallel code and the output of the recording information of the computer, the lower output of the shift register is connected to the first input of the sixth element AND, the second input connected to the output of the second element OR, the synchronous input of the second trigger, the second input of the first element AND, the first inputs of the first and fourth elements AND are connected to the first output of the pulse generator, the first inputs of the seventh and the eighth element And are connected through the element NOT with the shift input of the shift register and the output of the fourth element And, the output of the pulse distributor is connected to the second inputs of the seventh and eighth elements And, the outputs of which are The device’s inputs for connecting inputs Ready to receive and Ready to transmit a computer, the first input of the fifth element I is the input of the device connecting the information output of the communication line, the second input of the fifth element I is connected to the third input of the eighth element I, and the first input the third element OR and the second input of the fourth element AND, the third input of the fifth element AND is connected to the output of the third element OR, the third input of the sixth element AND is connected to the third input of the seventh element AND, the second input of the first element OR is the device input for connecting the output of a computer, characterized in that, in order to expand the field of application of the device, it is entered from the fourth to the seventh triggers from the fourth to the seventh OR elements, the NAND element, the counter and the decoder, the output of the fourth OR element is the device output for connecting the information input of the communication line, and the first and second inputs are connected respectively to you The signals of the second and sixth elements And, the output of the first element And and the direct output of the third trigger are connected respectively to the first and second inputs of the fifth element OR, the output connected to the first input of the second element And whose output is connected to the installation input of the fourth trigger, the inverse output of the connected to the second input of the element OR-NOT, the output of which is connected to the installation input of the fifth trigger, inverse and direct outputs connected respectively to the second inputs of the second element AND and the third element OR, the pulse distributor reset input is connected to the sixth output Editor N.Rogulich Order 3111/45 Compiled by V. Vertlib Tehred L. Serdyukova Proofreader G. Reshetnik Circulation 672 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 O five 0 0 five the OR element, the first to the fourth inputs of which are the device inputs for connecting respectively the outputs Receiving, Resetting, Reading information and Writing computer information, the reset inputs of the fourth and fifth triggers are respectively the input of the device for connecting the output Resetting the computer, the setup input of the sixth trigger is the input of the device for connecting the output of the computer transmission, the direct and inverse outputs of the sixth trigger are connected respectively to the third inputs of the seventh and eighth elements AND, and the reset input is with the output of the first element OR, the first input of the element AND-NOT is the input of the device for connecting the information output of the communication line, and the second input and the code are connected respectively to the inverse of the first trigger and the reset input of the counter, a group of outputs connected via a decoder to the input of the pulse generator and the setup input of the seventh trigger, the direct output of which is connected to the first input of the third OR element, and the reset input is the device input for connecting the signal output Resetting the computer, the counting input counter connected to the second output of the pulse generator.