SU968798A1 - Interface - Google Patents

Description

the command register and the fourth and fifth inputs of the device, and the second output and fifth input, respectively, with the second input and the first output of the information analysis node, the third, fourth, fifth and sixth inputs of which are connected respectively to the first and second inputs of the device, the corresponding output from the group of control outputs of the device and the third output of the command register, the second output connected to the third input of the state storage register, the fourth and fifth inputs of which are connected respectively to the second and third outputs information analysis node, the second output connected to the third input of the register of control signals, the fourth input of which is connected to the third input of the device, In addition, the information analysis node contains a decoder, a synchronization node, NOT element, AND elements, information counter, output switch, outputs which are connected, respectively, with the first, second and third outputs of the node, and a group of inputs, respectively, with the second, third, fourth, fifth, and sixth inputs of the node, an information counter, the output of which is connected to the first input The output switch, the syncronization node output is connected to the second input of the output switch and the first inputs of the first and second I elements, and the first and second inputs, respectively, to the sixth and first inputs of the node, the outputs of the first and second I elements, respectively, are connected to the first and second the second inputs of the information counter, the output of the first element I is connected to the third input of the output switch, and the second input through the element NOT to the output of the decoder and the second input of the second element I, the input of the decoder is connected to the first input of the node. The transcoding node contains the command decoder, the element NOT, the AND, OR elements, the mode trigger, the switch, the data format decoder, the data register whose output is the first output of the node, and the inputs are connected to the corresponding outputs of the switch, the mode trigger outputs are connected to the second the node output and the first and second inputs of the switch, the third input of which is connected to the output of the OR element, the fourth and fifth inputs - respectively to the fifth and third inputs of the node, and the sixth input - through the data format decoder from the fourth input la, the first and second inputs of the three modes are connected respectively to the outputs of the first and second elements And, the first inputs of which are connected to the second input of the node, the output of the command decoder is connected to the second input of the second element And, through the element NOT to the second input of the first element And, and inputs - respectively with the second and third nodes of the node / inputs of the element OR are connected to the fifth input of the node. . FIG. 1 is a block diagram of the device; in fig. 2 and 3 - functional diagrams of transcoding and information analysis nodes. The device contains (Fig. 1) command register 1, information output register 2, service signal register consisting of trigger 3, trigger signal, reversal trigger 4, request query trigger 5, information register b, state storage register 7, transcoding node 8 and node 9 analysis of information. Register 1 of commands is used to store commands coming from a channel, register 2 to output information — to issue information, a status byte or a byte of the updated state to a channel, depending on the control signal from the channel at the first input of the device. The trigger 3 of the trigger signal is used to form and store the trigger signal, the trigger 4 of the reverse signal is used to generate and store the reverse signal. Request Frigger 5 is designed to form and store a request to transmit (receive) data or status. Register 6 of information is used to receive at the second input of the device; 1 bytes of information from the subscriber and its storage; state storage register 7 for storing the status byte and the updated status byte. The transcoding node 8 serves for transcoding information received from the subscriber, the information analysis node 9 is used to analyze the information received from the subscriber. The transcoding node 8 contains (Fig. 2) a decoder 10 commands, a NOT 11 element, AND 12 and 13 elements, an OR 14 element, a mode trigger 15, a switch, consisting of four AND 16-19 element groups, a data register 20 and a decoder 21 data format. The decoder 10 serves to decrypt the control byte of information that specifies the mode of operation, trigger 15 to store the specified mode of operation (Mode 1 or Mode 2), OR 14 to generate the enable information recording signal in data register 20 for AND 16 elements switch elements AND 16-19 are for transcoding information. Register 20 is designed to store information until it is output to the channel. Descrambler 21 is used to decrypt the format of the data received from the subscriber. Node 9 analysis of the information contains the decoder 22, the node 23 synchroni; element, element 24, elements 25 and 26, information counter 27, output switch 28. Decoder 22 serves to decipher information or spaces (a space means the absence of information on all tracks). The synchronization circuit 23 is used to generate the clock signals (CC), the elements are NOT 24, AND 25 and 26 are used to generate the control signals by the information counter 27. The counter 27 is used to generate control signals, the switch 28 is to generate signals-Overflow (OVERFLOW.) End of zone or beginning of zone (CL OUT Requirements for data transmission (TPD-) Strobe recording information in the data register 20 for mode 2 (REC. MODE). 2) The device works as follows: The main commands performed by the device are: Mode of operation, Count, I Control Control 2, Refine state, additional: Idle and About I / O Consider the execution of commands Run Mode and Count. Through the fourth input devices and ka the command code receives the mode of operation and under the control of the signal Receive command (RECEPTION COM.) on the first input of the device writes .c to register 1 of the command. Switch 28 controlled by the signal received through the first input of the device The initial sampling state is received (STAT. VBR.PR.). Generates a signaling TPD and triggers the request trigger 5. Trigger 5 memorizes the request signal for receiving the control information byte from the channel and sends it to the channel. During the exchange with the channel, the corresponding control byte of information is sent to the node 8, decrypted on the decoder 10, and through the elements NOT 11, AND 12 or through the element 13 when the Current signal is present, the command from the register .1 sets the trigger 15 in the state of Mode 1 or Mode 2. After the trigger 15 is installed in the channel, the corresponding status byte pointers from register 7 are issued, which indicate normal completion of the operation, to which the channel responds with a status byte reception signal. This signal is received through the first input of the device as a signal. The state is currently received (COMPLETE.TEST.PR.) and sets registers 1 and 7. The device allows to receive information from the subscriber in four presentation formats (eight, seven, six). - and five element codes), whereas the information in the channel is given by an eight element code. After the command is completed, the operation mode from the channel through the fourth input of the device enters the command code. To count, which, under the control of the ACCESS signal, which came through the first input of the device, is written to register 1. On the signal COST. START VBR.PR. At the first input of the device and with the command Read in register 1, trigger 3 of the Start signal is turned on. From trigger output 3, the Start signal produces the start of the subscriber. From the subscriber to the second, the input of the device receives the first byte of information, followed by a synchronization signal (SI), in the presence of which the information from the subscriber is considered valid. This byte is in-. the formations are recorded in register 6. Next, information from register 6 enters node 8 at the inputs of AND elements 16-19. Depending on the state of the trigger 15 and the format of the received information on the decoder 21, the information is processed on one of the groups of elements AND 16-19. In case, if trigger 15 is in Mode 1 state, which corresponds to receiving information in copy mode, a. on decoder 21 there is a sign of one of the information formats, the information is processed on a group of elements And 16. At the same time, the information byte from register 6 enters the information analysis node 9 on the decoder 22. At the same time, under the control of the sync signal of the accompanying information from the subscriber, synchronization node 23, which generates a synchronization series (CC1, CC2, CVD). Under the control of the CC1 from the synchronization node 23, if a non-zero data byte has arrived, the element 25 arrives at the counter 27 and sets it to the state 00. Then, under the control of the CC2, the switch .28 generates the RECORDING signal arriving at the node 8 to the OR element 14, from the output of which the signal goes to one of the inputs of the AND 16 group of elements and allows the information to be recorded in the data register 20; The register 20 also receives information in the register 2. Next, under the control of the CVD, the switch 28 generates a signal of the TAP and switches the trigger 5 of the request . On trigger 5, a signal for requesting the transmission of information that is received is stored. em in the channel. During operation, a channel in the communication unit with a channel (not shown) generates an information signal (VIA. INF.) And an information release signal to the buses from the subscriber, going to the channel (TIME ON to IIN-A). These signals are received through the first input of the device to register B and, under their control, the information byte is transmitted to the channel, to which the channel responds with a receive information byte signal. In the channel communication, a signal is generated. The data byte is received / transmitted. which, through the first input of the device, sets the request trigger 5 to the zero state. This completes the processing and transfer to the channel of the information byte.

In the same way, other bytes of information are transmitted to the channel and i3ce.

Think

Operations

ends when

a signal from the channel that indicates the completion of the operation. In a communication unit with a channel, a Stop signal is generated, which, via the first input of the device, sets the trigger 3 of the Start-up signal. zero state and BSA removes the signal. Start-up output device, resulting in the subscriber stops its work. Simultaneously with the removal of the Start signal in register 7, the corresponding operation completion indicators are set, after which they are transmitted to the channel. As soon as the channel receives them, the operation is considered complete, and the device returns to its original state.

Consider performing the Read operation when trigger 15 is found.

with able

which means the need for recoding information. Recoding information is carried out according to the principles adopted in a particular computing system. The execution of this operation begins as well as the operations Read in mode 1. Information received from the subscriber from register 6 goes to the corresponding group of elements AND (let's take the second group AND 17 for example), and the two other inputs of elements 17 arrive at the sign of MODE 11 2 s trigger output 15 and an indication of the format of the data from the output of the decoder 21. Next, from the outputs of the elements And 17 information under the action of the control signal RECORDER.2 It is recorded in the register 20. The RECORDER.2 signal is generated in the node 9 on the switch 28. Then the transfer information to the channel occurs in the same way as in operation Read when executed in mode 1. The operation can be counted in mode 2 at the initiative of the channel or at the initiative of the device to detect the end of a zone (a zone is defined as a certain array of information containing any information other than zero, -.

the end (beginning) com zone is considered to be two zero bytes of information).

Consider the case of the end of an operChread in mode 2 by the end

tion

zone. When receiving information from the subscriber, the first zero byte comes from the output of register 6 to node 9 to the decoder 22, from the output of which, through element 24, the signal enters input of element 25. At the other input of element 25, CC1 comes from synchronization node 23. Node 23 runs from the SI, which accompanies the zero byte of information. Under the control signal from the output of the AND 25 element, the information counter 27 is set to state 01. The signal corresponding to state 01 goes to switch 28. Then, as soon as the second zero byte of information arrives from the subscriber, the signal from the decoder 22 goes through the element NOT 24 arrives at the element AND 25, to another input of which the CC1 arrives from the synchronization node 23. The control signal from the output of the logic element I 25 is again fed to the same input of the switch 28, to which the signal corresponding to the state 01 of the information counter 27 has come before, and the output of the fault signal from the output signal set by the trigger signal 3 for stopping subscriber operation, the corresponding operation completion indications to register 7 for transmitting them to the channel and terminating the operation.

Operations Management 1

Control 2 is allowed to search for an information zone in the forward or reverse direction when the trigger 15 of the mode is in the Mode 2 state.

When performing option

Radio control 1 and control 2

no transfer of information. Operations complete when the end (beginning) feature of the zone is detected. Verification of the operation occurs as described above in the operation Read in mode 2. I.

The Refine State operation allows you to obtain detailed information about a device failure. This operation is performed in the same way as the Read operation, only instead of the information. From the subscriber, a byte of the updated state is transmitted from register 7. The execution of this operation does not depend on the state of mode trigger 15.

The bits of the byte state register are set in the following cases:

Claims (2)

. a) if the subscriber is not ready for work, in this case it is generated. Symptom Operator (TV) intervention is required; b) when a command code that is not acceptable for the subscriber is detected, the command rejected (QoS) feature is generated; c) when an overflow feature is detected, the Overflow feature is generated at that moment when the channel for some reason did not receive the information byte, and a new information byte came to the device; d) when a parity error is detected in the data byte of that information, an error in the data is generated. Thus, the proposed device allows to reduce the amount of equipment and to reduce the computer time required for the software method of converting one data format to another. Claim 1. An interface device comprising an information issuance register, a status storage register and a control signal register, the first inputs of which are connected to the first input of the device, and an information register which input is connected to the second input of the device, the first output of the state storage register It is connected to the second input of the data register, the output of which is the information output of the device, the second input and the group of outputs of the register of control signals are connected respectively to the first output a command register and a group of control outputs of the device, the second inputs of the state storage register and the command register are connected to the third and fourth inputs of the device, respectively, characterized in that, in order to reduce hardware costs, a format conversion node and an analysis node are entered into it information, the first output of the transcoding node is connected to the third input of the information issuance register, the first input is connected to the information register output and the first input of the information analysis node, the second, third and fourth inputs correspond to Especially with the second output of the command register and the fourth and fifth inputs of the device, and the second output and the fifth input, respectively, with the second input and the first output of the information analysis node, the third, fourth, fifth and sixth inputs of which are connected respectively to the first and second the device input, the corresponding output and the group of control outputs of the device and the third output of the command register with the second output connected to the third input of the register, the storage of the state, the fourth and fifth inputs of which are connected respectively to the second and the third output of the analysis node, the second output connected to the third input of the register of control signals, the fourth input of which is connected to the third input of the device. 2. The device according to claim 1, which means that the information analysis node contains a decoder, a synchronization node, a NOT element, AND elements, an information counter, an output switch, the outputs of which are connected respectively to the first / second and the third outputs of the node, and the group of inputs - respectively with the second, third, fourth, fifth and sixth inputs of the node, the output of the information counter. connected to the first input of the output switch; the VELOAD of the synchronization node is connected to the second input of the output switch and the first inputs. The first and second elements are And, and the first and second inputs are respectively the sixth and first inputs, the outputs of the first and second elements And are connected respectively to the first and BTOpfcJM inputs of the information counter, the output of the first element And is connected to the third input of the output switch, and the second input is through the element is NOT to the output of the decoder and the second input of the second element And, the input is decrypted-. ra is connected to the first input of the node. 3. The device according to claim 1, wherein the transcoding node contains a command decoder, a NOT element, AND, OR elements, a mode trigger, a switch, a data decoder, a data register whose output is the first output of the node, and the inputs are connected to the corresponding switch outputs, the mode trigger outputs are connected to the second output of the node and the first and second inputs, the switch, the third input of which is connected to the output of the OR element, the fourth and fifth inputs, respectively, the fifth and third inputs of the node, and the sixth input - through the decrypt A data format controller with the fourth input of the node, the first and second inputs of the mode trigger are connected respectively to the outputs of the first and second elements AND, the first inputs of which are connected to the second input of the node, the output of the instruction decoder is connected to the second input of the second element AND and through the element NOT to the second input the first element is AND, and the inputs are respectively the second and third inputs of the node, the inputs of the OR element are connected to the fifth input of the node. Sources of information taken into account during the examination 1. USSR author's certificate No. 502232, cl. G 06 F 3/04, 1976. 2. USSR author's certificate No. 697991, cl. G 06 F 3/04, 1978 (prototype).