SU849217A1

SU849217A1 - Logic circuit testing device

Info

Publication number: SU849217A1
Application number: SU792784299A
Authority: SU
Inventors: Леонид Викторович Дербунович; Александр Николаевич Мызь; Олег Иванович Потепух
Original assignee: Харьковский Ордена Ленина Политех-Нический Институт Им. B.И.Ленина
Priority date: 1979-06-18
Filing date: 1979-06-18
Publication date: 1981-07-23

Description

(54) УСТРОЙСТВО ДЛЯ КОНТРОЛЯ ЛОГИЧЕСКИХ СХЕМ(54) DEVICE FOR THE CONTROL OF LOGICAL CIRCUITS

1one

Изобретение относитс к вычислительной технике, а именно к устройствам дл контрол логических схем.The invention relates to computing, namely, devices for controlling logic circuits.

Известно устройство дл проверки функционировани логических схем, содержащее блок входных и эталонных выходных сигналов, блок контролируемых выходов, коммутатор, блок сравнени , блоки контрольных регистров , блок индикации, блок ввода данных и блок управлени 1}.A device for testing the operation of logic circuits is known, comprising a block of input and reference output signals, a block of monitored outputs, a switch, a comparison block, control register blocks, a display block, a data input block and a control block 1}.

Однако такое устройство не предусматривает согласовани входов и выходов по уровн м сигналов с объектом контрол и не позвол ет контролировать величины параметров логических элементов относительно заданных допусков.However, such a device does not provide for matching the inputs and outputs by signal levels with the control object and does not allow controlling the values of the parameters of logic elements with respect to predetermined tolerances.

Кроме того, вырабатыва сигналы о-неисправности блоков пам ти, устройство не дает однозначной информации Неисправность объекта, Неисправность контролирующего устройства , так как самоконтролем не охвачены коммутатор и блок сравнени .In addition, by generating signals about the malfunction of the memory blocks, the device does not give unambiguous information Malfunction of the object, Malfunction of the controlling device, since the switch and the comparison unit are not covered by self-control.

Наиболее близким к изобретению вл етс устройство дл контрол схем цифровых вычислительных машин, содержащее анализируемую схему, блок ввода, выхол которого соединенClosest to the invention is a device for controlling digital computer circuits, comprising an analyzed circuit, an input unit, the exhaust of which is connected

с входом регистра задани и блока / управлени , второй вход которого соединен с вы.ходом блока сравнени ,второй выход блока сравнени соединен . с входом блока индикации, выходы блока управлени соединены соответственно с входами регистра задани блока ввода , блока сравнени и блока индикации , выход регистра задани соеди10 нен с вторым входом блока сравнени , а также преобразователь, блок эталонов и компаратор-преобразователь, причем второй выход регистра задани соединен с входом преобразовател 15 коммутатора, выход которого соединен с входом анализируемой схемы, выход анализируемой схемы соединен с входом компаратора-преобразовател , второй вход которого соединен с выхо20 дом блока эталонов,а выход -с входом блока сравнени , вторрй вход преобразовател и третий вход компаратора- . преобразовател соединены с соответствующими выходами блока управлени . to the input of the job register and the control unit / control, the second input of which is connected to the output of the comparison unit, the second output of the comparison unit is connected. the input of the display unit, the outputs of the control unit are connected respectively to the inputs of the job register of the input unit, the comparator and the display unit, the output of the job register is connected to the second input of the comparator, as well as a converter, a unit of standards and a comparator converter connected to the input of the converter 15 switch, the output of which is connected to the input of the analyzed circuit, the output of the analyzed circuit is connected to the input of the comparator-converter, the second input of which is connected to the output2 0 is the house of the standards block, and the output is the input of the comparison block, the second input of the converter, and the third input of the comparator is. the converter is connected to the corresponding outputs of the control unit.

25 Недостаток устройства заключаетс в том, что оно не позвол ет автоматически подключать требуемые входы и выходы анализируемой схемы, что существенно увеличивает врем , необходимое дл проведени контрол , и при25 The disadvantage of the device is that it does not allow to automatically connect the required inputs and outputs of the analyzed circuit, which significantly increases the time required for monitoring, and

смене объекта контрол требует наличи дополнительных разъемов дл подключени входов и выходов анализи- руемой схемы к преобразователю и компаратору устройства.Changing the control object requires additional connectors for connecting the inputs and outputs of the analyzed circuit to the converter and comparator of the device.

Кроме тгго, отсутствие режима самоконтрол устройства э процессе контрол дискретных устройств существенно снижает достоверность Проведни контрол , так как при регистрации схемой сравнени неисправности Нельз определить, неисправна анализируема схема или неисправность произошла в самом устройстве контрол ,In addition, the lack of a self-monitoring mode of the device during the control process of discrete devices significantly reduces the reliability of the control, because during the registration by the comparison circuit of the fault, it is impossible to determine whether the circuit being analyzed is faulty or the fault has occurred in the control device itself,

Цель изобретени - повышение достоверности контрол .The purpose of the invention is to increase the reliability of the control.

Поставленна цель достигаетс тем что в устройство, содержащее блок ввода,, блок управлени , регистр задани , блок эталонов, аналого-цифровой преобразователь, блок сравнени , блок цифро-аналоговых преобразователей и блок индикации, при этом первый выход блока ввода соединен с входом блока эталонов, выход которог подключен к первому входу аналогоцифрового преобразовател , выход коTopoiO соединен с первым входом блока сравнени , первый выход которого подключен к первому входу блока управлени , задающий выход которого подключен к первому входу регистра задани , первый выход которого соединен с вторым входом сравненени , а группа выходов подключена к группе входов блока цифроаналоговых преобразователей, первый вход которого соединен с первым управл ющим выходом блока управлени , второй управл ющий выход которого подключен к третьему входу блока сравнени , выход которого соединен с первым входом блока индикации, подключенного .вторым входом к третьему управл ющему выходу блока управлени четвертый управл ющий выход которого соединен с вторым входом аналогоцифрового преобразовател , п тый управл ющий выход блока управлени подключен к входу блока ввода, второй выход которого соединен с вторым входом блока управлени , третий выход блока ввода подключен к второму входу регистра задани , введены регистр маски и коммутатор, содержащий п коммутирующих групп, кажда из которых содержит три элемента И и элемент ИЛИ, при этом в каждой группе первый вход первого элемента И объединен с первым входом второго элемента И группы и подключен к соответствующему входу блока цифроаналоговых преобразователей, второй вход первого элемента И группы объединен с первым входом элемента ИЛИ-Н и подключен к соответствующему входу первой группы выходов регистра,, маски , первый выход коммутирующей группы объединен с вторым входом элемента ИЛИ-НЕ группы и подключен к соответствующемуч выходу второй группы выходов регистра маски, выход элемента ИЛИ-НЕ группы соединен с вторым входом второго элемента И группы, выходы второго и третьего элементов И объединены и подключены к соответствующему входу аналогоцифрового преобразовател ,выход первого элемента И группы объединен с первым входом третьего элемента И группы и подключен к соответствующе входу-выходу контролируемого объекта , первый вход регистра маски соеднен с шестым управл ющим входом блока управлени , четвертый выход блок ввода подключен к второму входу регистра маски.The goal is achieved by the fact that the device containing the input unit, control unit, task register, standard unit, analog-digital converter, comparison unit, digital-analog converter unit and display unit, wherein the first output of the input unit is connected to the input of the standard unit The output of which is connected to the first input of the analog-digital converter, the output of KotopoiO is connected to the first input of the comparison unit, the first output of which is connected to the first input of the control unit, which determines the output of which is connected to the first the register of the job, the first output of which is connected to the second input of the comparison, and the group of outputs is connected to the group of inputs of the digital-to-analog converter unit, the first input of which is connected to the first control output of the control unit, the second control output of which is connected to the third input of the comparison unit, whose output connected to the first input of the display unit connected by the second input to the third control output of the control unit whose fourth control output is connected to the second input of an analog digital digit the converter, the fifth control output of the control unit is connected to the input of the input unit, the second output of which is connected to the second input of the control unit, the third output of the input unit is connected to the second input of the job register, a mask register and a switch containing 5 switching groups, each of which are contains three elements AND and element OR, in this case in each group the first input of the first element AND is combined with the first input of the second element AND of the group and connected to the corresponding input of the block of digital-analogue converters, watts The input of the first element AND group is combined with the first input of the element OR-H and connected to the corresponding input of the first group of register outputs ,, mask; the first output of the switching group is combined with the second input of the element OR-NOT group and connected to the corresponding output of the second group of outputs of the mask register , the output of the element OR NOT the group is connected to the second input of the second element AND of the group, the outputs of the second and third elements AND are combined and connected to the corresponding input of the analog-digital converter, the output of the first element a AND of the group is combined with the first input of the third element AND of the group and connected to the corresponding input-output of the monitored object, the first input of the mask register is connected to the sixth control input of the control unit, the fourth output of the input block is connected to the second input of the mask register.

На чертеже показана структурна схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство содержит блок 1 ввода регистр 2 задани , блок 3 цифро-аналоговых преобразователей, блок 4 сравнени , контролируемый объект 5, аналого-цифровой преобразователь 6, блок 7 управлени , блок 8 индикации ,, блок 9 эталонов, регистр 10 маск-и и коммутатор 11, состо щий из первой 12, второй 13 и третьей 14 групп элементов с трем устойчивыми состо ни ми и группы элементов 15 ИЛИ-НЕ.The device contains a block of 1 input register 2 tasks, a block of 3 digital-analog converters, a block 4 of comparison, a controlled object 5, an analog-digital converter 6, a block 7 of control, a block 8 of indication, a block of 9 standards, a register 10 mask and switch 11, consisting of the first 12, second 13 and third 14 groups of elements with three stable states and the group of elements 15 OR NOT.

Блок 1 ввода предназначен дл введени информации, необходимой дл анализа объекта. Регистр 2 заданИ предназначен дл хранени и выдачи на блоки 3 и 4 необходимой информации в дискретной форме дл анализа схем объекта.The input unit 1 is intended to enter information necessary for analyzing an object. Register 2 is set for storing and delivering the necessary information in blocks 3 and 4 in discrete form for analyzing the object's circuits.

Блок 3 цифро-аналоговых преобразователей предназначен дл преобразовани информации, поступающей с регистра 2 задани в дискретной форме , и выдачи ее в виде сигналов в аналоговой форме через коммутатор 11 на контролируемый объект 5 или входы аналого-цифрового преобразовател б.Block 3 of the digital-analog converters is designed to convert information from the register 2 of the task in discrete form and output it as signals in analog form via the switch 11 to the monitored object 5 or the inputs of the analog-to-digital converter b.

Блок 4 сравнени предназначен дл сравнени сигналов в дискретной форме, поступающих с блока и регистра задани , а также выдачи результата сравнени в блоки 7 и 8.Comparison unit 4 is intended for comparing signals in discrete form, coming from the block and the task register, as well as issuing the comparison result in blocks 7 and 8.

аналого-цифровой п еобразователь 6 предназначен дл анализа.параметров сигналов в аналоговой 4)Орме, поступающих с коммутатора 11,путем сравнени их с эталонами верхних и нижних пределов параметров, поступающих с блока 9 эталрнов, а также преобразовани сигналов аналоговой формы, поступающих с выходов коммутатора 11, в сигналы дискретной формы , выдаваемые в блок.4 сравнени .Analog-to-digital driver 6 is designed to analyze signal parameters in analog 4) Orme received from switch 11 by comparing them with the standards of the upper and lower limits of parameters coming from block 9 of reference signals, as well as converting analog signals from the outputs switch 11, to discrete signals, outputted in block 4 of the comparison.

Claims

The control unit 7 generates control signals and synchronizes the operation of the entire device depending on the signals arriving at it from blocks 1 and 4. The display unit 8 is designed to indicate the result of the comparison. Unit 9 of the standard is intended to form the upper and lower limits of the parameters in analog form in accordance with the requirements, the parameters of the object being monitored are entered digitally into it at the beginning of each control cycle from the input unit 1, and entered into the analog digital converter. The mask register 10 is intended for storing and issuing to the switch 11 information controlling the states of the first 12, second 13 and third 14 groups of elements with three stable states. Switch 11 is designed to provide three modes of operation of the device for each input of the converter and each input-output terminal of the controlled object. In the first mode, if for a pair of control, inputs of this input output node, consisting of three elements with three stable connections. either, and the elements OR NOT come the corresponding combination (01) from the mask register outputs, element 12 is opened, and elements 13 and 14 are closed. Control signals from the output of the task register through the converter are fed to the input of the controlled object. In the second mode, if the corresponding combination (10) from the output of the mask register arrives to a pair of control ICs of this input-output node, elements 12 and 13 are closed and element 14 is opened. The signal of this output of the controlled volume enters through element 14 to the input of converter b . In the third mode, if the corresponding combination (00) arrives at the pair control inputs of this input-output node, the output signal of element 15 OR NOT opens element 13, and the control signals of the mask register are closed by elements 12 and 14. The control signals from the output register 2 Controls through converter 3 are fed to converter b, and a passive switching mode of the device with a controlled object is provided, which allows to achieve logical flexibility, the ability to control the parameters of the logic circuit at specified limits, the opera ivnosti adjustment device by changing the control object and .Change in self-checking mode. The program for checking the object and testing the device where the punched tape is chosen as the carrier begins with the code. The national program is followed by a mask code defining the switching mode of each input-output node at which the outputs of the job register are connected. through a group of elements 13 to the inputs of the converter 6. Next comes the subroutine of the test control of the device, consisting of n + 1 lines, where n is the maximum number of contacts connecting the analyzed circuit. The line number of the subroutine corresponds to the channel number of the control path, and the information recorded in one line corresponds to the code of that signal with certain parameters. This requires monitoring the channel. When checking the device, all channels of information flow are monitored. The correct operation of the device is indicated by a signal coming from the comparison unit 4 to the control unit 7, which issues commands for the next test set to the unit 1, in case of any device malfunction from block 4, blocks 8 and 7 receive a signal where the control unit stops the further input of the tests, the block 8 lights up the Unableness panel, and also indicates the address of the device malfunction, after which the malfunction is eliminated by the operator and the test cycle repeats. If the control program of the device is successful, the punched signal from the block 1 of the control unit 7 enters the input subroutine of the control subroutine, the corresponding signal from block 1 in block 7 causes the generation of reset commands for all the blocks of the device, and then on the output buses The mask register from block 1 sets the mask code that switches the switch to the object control mode, and the input / output nodes corresponding to the inputs of the object being monitored are set to output control information mation from the device to the object, control, and nodes corresponding outputs of circuits mounted in a state entry. Next, control of the controlled object is performed. The information of one line of the subroutine is read by lock 1 of the input from the punched tape into the registry 2 tasks. In each bit of the register, a code information is generated that specifies a signal with the necessary parameters for each contact of the controlled object 5. From the register register 2 tasks are set by the command 3 of the control unit 7, which is generated in the same way as in the device checking process, by reading the code the lines are converted into the analogue form of the converter 3, through the switch 11, onto the controlled object 5. The same information from the register 2 will go to block 4 of the comparison. Block 7 polls monitored object 5 for all contacts. The signal in analog form comes from the contact through the switch 11 to the analog-to-digital converter 6 and is analyzed by comparison with the standards of the upper and lower limits of the analyzed parameter. The result of the analysis is converted into a discrete form and, at the command of unit 7, is fed to the comparison unit 4, where it is compared with the signals received from register 2 of the tasks. The result of the comparison is fed to blocks 7 and 8. If the circuit being analyzed according to this subroutine is operating normally, block 7 generates a signal for reading the next program and the cycle repeats. At the end of the entire verification program, unit 7 generates a signal about the validity of the monitored object 5, which enters the indication unit 8, and highlights the Glad display. In case of a mismatch between the logical operation or the specified parameters of the object under test 5 in accordance with the program, the control unit 7 generates a signal, which leaves further verification of the object. This signal enters the display unit 8, which is highlighted by -. The panel shows Marriage, and also indicates the fault address of the controlled object. This allows you to include in the device diagnostics of failures. If necessary, a further check of the monitored object is carried out manually (device). The invention allows to have reliable information about the correct functioning of the device, and also to quickly change the device programmatically in the case of changing the type of circuit being analyzed which is extremely important when setting up, repairing and operating layered systems. Invention A device for monitoring logic circuits comprising yes, a control unit, a task register, a standard unit, an analog-to-digital converter, a comparison unit, a digital-analog converter unit and a display unit, while the first output of the input unit is connected to the input of the standard unit, the output of which is connected to the first input of the analog-digital converter, the output of which is connected to the first input of the comparison unit, the first output of which is connected to the first input of the control unit, the setting output of which is connected to the first input of the register of the task, the first output of which is connected by the second input of the block A comparison and a group of outputs are connected to a group of inputs of a block of digital-analog converters, the first input of which is connected to the first control output of the control unit, the second control output of which is connected to tr, the network input of the comparison block, the output of which is connected to the first input of the display unit connected by a second input to the third control output of the control unit J, a fourth control output of which is connected to the second input of the analog-digital converter, the fifth control output of the control unit is connected To the output of the input unit, the second output of which is connected to the second input of the control unit, the third output of the input unit is connected to the second input of the job register, characterized in that it contains a mask register and a switch containing n switching groups, in order to increase the accuracy of the control, each of which contains three AND elements and an OR element, wherein in each group the first input of the first AND element is combined with the first input of the second AND element of the group and connected to the corresponding input of the block of analog-to-digital converters, The second input of the first element AND of the group is combined with the first input of the OR-NOT element and connected to the corresponding input of the first group of outputs of the mask register, the first output of the switching group is combined with the second input of the element OR-HЁ group and connected: To the corresponding output of the second group of outputs of the mask register, the output of an element of the OR-NOT group is connected to the input of the second element AND of the group, the outputs of the second and third elements AND G11) are combined and connected to the corresponding input of the analog-digital converter, the output of the first element And coagulant group is combined with the first input of the third AND gate group and connected to the corresponding input-output of the controlled object, a first input mask register is connected to a sixth control input of control unit, fourth output of the input unit connected to the second input of the mask register. Sources of information taken into account in the examination 1. The author's certificate of the USSR 354415, cl. G About F 11/00, 1970.

2. USSR author's certificate number 378852, cl. G 06 F 11/00, 1973 (prototype) ..