SU1532940A1 - Multichannel device for connection of information sources to common trunk - Google Patents

Abstract

The invention relates to computing and can be used in distributed control systems containing several active information sources connected to a common highway. The purpose of the invention is to expand the scope by reducing synchronization stability requirements. The device contains K channels / K - the number of information sources /, in each channel there is a counter, a trigger, three AND elements, an OR element and an NOT element. If there is a request in this device, the transfer of any information leads to the entry of a priority code into the counter. In the acquisition phase, the transmission of signals on the line is stopped, and the clocking pulses cause an overflow of the counter to which the highest priority was recorded. 1 il.

Description

The invention relates to computing and can be used in distributed control systems containing several active information sources connected to a common highway.

The purpose of the invention is to expand the field of application by reducing the synchronization stability requirements.

The drawing shows a block diagram of the device channel.

The device channel contains the input 1 of the request, the output 2 of the confirmation of the request, the input 3 of the priority code, the counter 4, the trigger 5, the elements AND 6,7,8, the element OR 9 and the element NOT 10, the synchronous input 11, the information input 12, the line 13 of the highway.

The device works as follows.

In the phase of information transfer, the Manchester-11 code from the output of the element OR S continuously outputs pulses of short duration. If there is a signal, they are sent to the input of the installation of 1 trigger 5 and the input of the entry of counter 4. In this case, the trigger 5 is set to one, and the priority code from input 3 of the channel is entered into counter C.

If there is no signal, Query trigger 5 is reset, and counter 4 is zeroed. UveSP clock pulses

with 1C

with

Ј

They emit the contents of counter 4, one-cco new impulses, following from the main line, again transfer it to the original state. Since the frequency of the pulses coming from the output of the OR 9 terminal is not less than the frequency of the clock pulses, the value of the contents of the priority counter can increase by no more than one.

After the end of the transfer phase of the information, the state of the trigger 5 remains unchanged, and the content of the counter A increases each time with the arrival of the next clocking E14 pulse. The overflow signal at the end of the counter B occurs before the full Multi-channel device for connecting information sources to a common highway containing K (K - number of information sources) channels, each of which contains a counter, a trigger, the first element I, and the overflow output of the counter is connected to the first the input of the first element And, characterized in that, in order to expand the scope of application by reducing the requirements for synchronization stability, each channel of the device additionally contains a second and third elements And, the element is NOT and the element is OR, and the input channel request device

5 on the device that has

the highest priority among devices; 20 is united with the first input of the second ele and || who received a signal for-. H ment and and input “om the element is NOT, the output is asking. It is this device that captures the highway, since the output signal of the counter through line 13 of the highway returns to its original 25

Reporting the contents of all k counters

devices At the same time, an impulse appears at device 2, which captures the highway, at its output 2, the source of information 30 sends a signal to Query 11 and starts

Transfer information to the trunk.

In the event that a request is not received by any device, the signal at the output of counter 4 is almost simultaneously with all devices and enters the trunk, simulating the information sending phase. At the same time, the signal from the output of the trigger 5 blocks the issuance of a confirmation signal to the request, even if by the time of completion of the filling of the counter k, a device has received a request.

I

35

40

which is connected to the first input of the third element And whose output is connected to the inputs of the installation in the 0m counter and the trigger, the output of the trigger is connected to the second input of the first element And whose output is connected to the output of the device channel request confirmation, the synchronization and information inputs of which are connected respectively to the input of the counter and the first input of the OR element, the second input of which is connected to the overflow output of the counter, the recording input of which is connected to the output of the second And element and the installation input to 1 three the meter, the information input of the counter is connected to the input of the device channel priority code, the outputs of the OR elements of all channels of the device are combined and connected to the second inputs of the second and third elements AND of all channels of the device.

Claims (1)

Invention Formula A multichannel device for connecting information sources to a common highway containing K (K is the number of information sources) channels, each of which contains a counter, a trigger, a first AND element, and the overflow output of the counter is connected to the first input of the first AND element, characterized in In order to expand the scope of application by reducing the synchronization stability requirements, each channel of the device additionally contains the second and third elements AND, the element NOT and the element OR, and the input channel request device Twa one with the first input of the second element AND and the input of the element NO, the output one with the first input of the second element AND and the input of the element NO, the output 0 five 0 which is connected to the first input of the third element I, the output of which is connected to the inputs of the 0m counter and the trigger, the output of the trigger is connected to the second input of the first element I, the output of which is connected to the output of the device channel request confirmation, the synchronization and information inputs of which are connected respectively to the counting the input of the counter and the first input of the OR element, the second input of which is connected to the overflow output of the counter, the recording input of which is connected to the output of the second And element and the installation input to 1 three the meter, the information input of the counter is connected to the input of the device channel priority code, the outputs of the OR elements of all channels of the device are combined and connected to the second inputs of the second and third elements AND of all channels of the device.