SU1319036A1 - Device for checking serial code - Google Patents

Abstract

The invention relates to automation and computing and can be used to control data transmission over a communication channel. Purpose . invention - improving the diagnostic ability of the device. Before starting, trigger 1 and counter 2 are set to one and zero, respectively. The information input 8 of the device receives the transmitted information, which passes to the counting input of trigger 1, the output of which is connected to the first inputs of all elements AND of the first group 3. At the input 12 of the control bit of the device, there is a control word that constantly goes to the first inputs of all elements of the second group 4. At the end of the word transfer, the strobe from device input 11 adds one to counter 2 and enters input of delay element 5, the output of which is connected to the second inputs of all elements ITS AND groups 3 and 4 The output of counter 2 is connected to the address input of the decoder 6, the outputs of which are connected to the third inputs of the corresponding elements AND groups 3 and 4. The corresponding elements of groups 3 and 4 and the signals from their outputs are polled by the delayed strobe signal. The corresponding comparison node of group 7 is compared. In the case of non-comparison, a signal is generated at the corresponding output of group 13 of the device error indication outputs. 1 il. (L with with about with 05

Description

one

The invention relates to automation and computing and can be used to control data transmission over a communication channel.

The aim of the invention is to increase the diagnostic ability of the device.

The drawing shows a functional diagram of the device.

The device DP controls the serial code, contains trigger 1, counter 2, first 3 and second 4 groups of elements AND, delay element 5, decoder 6, a group of 7 comparison nodes, information input 8 of the device, installation inputs 9 and 10 of the device, gate input 11 devices, input 12 test bits of the device,. a group of 13 outputs for a device error indication. In addition, in the drawing there is indicated a communication interface block 14 with communication channels, which is not part of the device.

From communication unit 14 with communication channels, the following sequence of information code arrives at the information input 8 of the device and enters the communication channel; on the first installation input 9 of the device - the signal of the beginning of each word in the information message; to the second installation input 10 of the device - the signal of the beginning of the information message; the gating input 11 of the device 11 is the termination signal of each word in the information message; at the input 12 of the control bit of the device, there is a modulo two convolution signal for each word that is present at the time of issuance of the corresponding information word.

Counter 2 is used to count the number of words in a message.

The delay element 5 is intended to compensate for transients in the counter 2.

Information outputted from the interface unit 14 to the communication channel also enters the device via information input B.

The device works as follows.

Before issuing information from interface 14, the first and second installation inputs 9 and 10 of the device receive signals that set the trigger 1 to 1, respectively, and the counter 2 to O, to input 12

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the control bit of the device receives a modulo two convolution signal, which retains its value for the time the word is output.

5 The sequence of pulses of the information message arrives at the counting input of trigger 1; moreover, if the number of pulses in the word is even, then the trigger is set to

fO i, if it is odd, then in O. At the end of each word, a strobe signal arrives at the counting input of counter 2. Thus, counter 2 counts the number of words in the message. The word termination signal of the strobe input 11 of the device also enters through the delay element 5 to the third inputs of all AND elements

3 and the second 4 rpynh.

20 Suppose that the number of pulses in the word is even, then at the trigger of trigger 1 there is a signal 1, which goes to the first inputs of all elements AND of the first group 3. At the first inputs of all elements And the second group 4 there is a convolution signal modulo two for This word comes from the input 12 of the control bit of the device. On one of the outputs of the decoder 6, a positive potential is established corresponding to the control word of the message, which is fed to the second inputs of the corresponding elements AND

35 first 3 and second 4 groups. On the third inputs of the elements And the first 3 and second

4groups with delay element 5 post. control signal is received. C signal

element And the first group of 3 arrives

40 to the first input of the corresponding node compared to group 7, where it is compared with the signal arriving at its second input from the corresponding AND element of the second group 4.

45 In case of distortion of the output pulse sequence in the word at the output of the comparison node of group 7, corresponding to the given word, an error signal appears.

50 Similarly, each word of the message is checked.

The word control of the transmitted information allows to establish the place of the error and, if necessary, to repeat the error word 55.

Claims (1)

Formula for controlling a serial code containing a trigger, a delay element and two groups of elements, and characterized in that, in order to show the diagnostic ability of the device, a counter, a decoder and a group of comparison nodes are entered into it, the single trigger input being the first the setup input of the device, the counting trigger input is an information input of the device, the reset input of the counter is the second installation input of the device, the input of the delay element is combined with the counting input counter house and is strobiruyuvshm input device, a direct output of the flip-flop is connected to the first inputs of all the AND gruppy.vyhody first being connected with the first informatsiSostavitel Grechnev V. Editor O. Bugir Tehred I.Popovich Corrector l. Pilipenko 2514/44 Circulation 672 Subscription VNISh State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 By the corresponding inputs of the corresponding group comparison nodes, the outputs of which equally form a group of outputs are indicative of a device error, the first inputs of all elements of the second group are combined and form the control bit input of the device, the output of the delay element is connected to the second inputs of all elements of the first and second groups the outlets of the counter are connected to the information inputs of the depragforator, the outputs of which are connected to the third inputs of the corresponding elements of the first and second groups, the outputs of the elements of the second group of with the second information inputs of the respective group comparison nodes.