SU1661777A1 - Device for interfacing source and receiver of information - Google Patents

Abstract

The invention relates to computing and can be used in systems for transmitting information from a source to a receiver. The purpose of the invention is to expand the functionality of the device by providing the ability to transmit messages of variable length. The device contains a memory block, a counter, a trigger, an OR element, a delay element, a decoder. 1 il.

Description

one

(21) 4731814/24

(22) 14.06.89

(46) 07.07.91. Bul Number 25

(71) Institute for Management Issues

(72) L.B. Belokrinitska, M.Kh.Kakadzhanov, S.V.Nikiforov, V.N.Tereshchenko M.P.Farkhadov and V.G. Fursov (53) 681.3 (088.8)

(56) USSR Author's Certificate No. 1309032, cl. G 06 F 13/00, 1985.

USSR Author's Certificate No. 1236491, cl. G 06 F 13/00, 1985.

(54) DEVICE FOR PAIRING THE INFORMATION SOURCE AND RECEIVER (57) The invention relates to computer technology and can be used in information transmission systems from a source to a receiver. The purpose of the invention is to expand the functionality of the device by providing the ability to transmit messages of variable length. The device contains a memory block, a counter, a trigger, an OR element ,; delay element, descrambler. 1 il.

The invention relates to computing and can be used in systems for transmitting information from a source to a receiver.

The purpose of the invention is to expand the functionality of the device by providing the ability to transmit messages of variable length.

The drawing shows the block diagram of the device.

The device contains a memory block 1, a counter 2, a trigger 3, an element OR 4, a delay element 5, a decoder 6 of the message end code, information input 7 and output 8 of the device, outputs 9 and 10 of the write and read resolution of the device, inputs 11 and 12 of clock pulses read and write device indicator

output 13 of the device.

The device is designed to operate in variable-length messaging systems from a source to a source, in which the transmission of a message contains forbidden characters, and the interaction between the source and the receiver follows the rules established by the receiver.

The device works as follows.

In the initial state, the counter 2 is reset (the circuit of the counter 2 is not shown in the drawing). Counter 2 in the zero state resets trigger 3, which by signals at outputs 9 and 10 allows the source to record information in block 1, and the receiver disables reading.

(The source at any time writes words (bytes) of the message in block 1, set the word dangling input 7 and accompanying it with a sync pulse on input 11. In this case, the counter 2 indicates the cells into which the next word should be recorded, the signal from the inverse trigger output 3 sets block 1 recording mode, and from the output element (L

with

oh oh

vj

-h

Time Delay 5 receives a call synchronization signal.

The process of writing the data words in the block continues until the decoder 6 recognizes the end of message code. The signal from the output of the decoder 6 switches the trigger 3 to one state, as a result of which the source is prohibited to write to block 1, which switches to read mode, and the receiver is allowed to read block 1.

Upon receiving a read enable signal on input 10, the receiver reads the contents of counter 2 on output 13, if necessary, performs the allocation of the required memory buffer, etc.

The reading of block 1 is carried out by sending sync pulses at input 12 and then reading the data word at output 8. In this case, the information from block 1 is read in reverse order (stack mode). During the reading process, the Receiver can read the contents of counter 2 on exit 13.

After reading the message of the counter 2, it goes to the zero state, flushes the trigger 3, the switching of which brings the device to the initial state, i.e. readiness status of receiving data from the source.

Thus, the device transmits information from the source to the receiver with variable length messages.

Claims (1)

Invention Formula A device for coupling the source and receiver of information, containing a memory block, the information input and output of which are the corresponding input and output of the device for connecting to the information output of the information source and the information input of the information receiver, trigger, inverse and direct outputs are the corresponding outputs of the device for connecting to the enable input of the information source write and the read enable input of the information receiver, the counter, the zeroing output and the information in the stroke of which is connected respectively with the trigger reset input and the address input of the memory unit, the synchronization input of which is connected through the delay element to the output of the OR element, the input of the operation mode of the memory block is connected to the inverse output of the trigger, and the first and second inputs of the OR element are respectively inputs of the device for connecting to the output of the sync pulses of the source recording and the output of the synch pulses of reading the information receiver, characterized in that, in order to expand the functional capabilities of the device by the ability to send messages of variable length, a descriptor of the end of message code has been entered into it, the information input of which is connected to the device input for connecting the information output of the information source, and the output is connected to the trigger input, the synchronization input of the end message decoder is connected to the input for connecting the output of the clock pulses information source and the counting input of the counter, the subtracting input of which is connected to the input of the device to connect the output of the clock pulses information information counter information output is connected to the device output for connection to the indicator input of the information receiver.