SU1348838A2 - System for checking electronic devices - Google Patents

Abstract

The invention relates to computing and can be used in the systems of automatic control of digital devices during their production and operation. The purpose of the invention is to increase the reliability of the functioning of the system. The system contains a computer 1, a shift register 2, a comparison block 3, a counter 4, a clock 1 generator 5, a pulse distributor 6, a communication bus with a control object, the first interrupt input 8, an address bus 9, a data bus 10, a start bus 11 of a clock generator , stop input 12, decoder zero 13, element OR 14, multiplexer 15, element of comparison 16, second interrupt input 17. The invention makes it possible to increase the reliability of the system by determining the erroneous fault addresses of the blocks being tested. The multiplexer 15, the reference element 16 and the shift register 2 provide control of the correspondence of the readings of the counter 4 and the shift register 2 to the input 17 of the interrupt. The computer confirms the correctness of the formation of the fault address in the monitored block. 1 il. from 5 (L hch

Description

The invention relates to the numerical technique, can be used in the systems of automatic control of digital devices during their production and operation, and is an improvement of the known device according to the basic author. St. No. 1005063.

The purpose of the invention is to increase the reliability of the control.

The drawing is a diagram for controlling electronic devices.

The system contains an electronic computer (computer) 1, register

2shifts, comparison unit 3, counter 4, clock generator 5, pulse distributor 6, bus 7 communicating with the control object, first interrupt 8 input of computer 1, 11 to 9 address, data bus 10, clock start bus 11, stop 12, the decoder is 13 zero, the element OR 14, the multiplexer 15, the element 16 of the comparison, the second input 17 of the computer interrupt.

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The system works as follows.

At each step of the test sequence, the computer 1 issues a control code, consisting of ones and zeros, to the controlled object via bus 7, then passes bus 10 to computer 1 to the unit

3 comparison is the reference code corresponding to the response signals of a serviceable monitored object. At the end of the transient processes in a controlled computer object 1, bus 11 starts P clock i-generator 5, which begins to generate a sequence of clock pulses arriving at the input of the distributor 6 pulses, which ensures the issuance of single pulses from the first and second output and a sequence of pulses third exit. The impulse from the first output of the distributor 6 in the comparison unit 3 fixes the result of the comparison of the reference code with the code of the object under control. Fixed comparison result code from block outputs

3 comparisons are fed to the information inputs of the shift register 2 and a pulse from the second output of the pulse distributor 6 is written to the shift register 2.

If there are no units in the fixed code, which indicates the health of the controller

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object, the signal from the output of the decoder 13 zero through the element OR 14 via the bus 12 is fed to the input of the computer 1 and the blocking input of the clock 1 generator 5, otherwise, for each clock pulse from the third output of the distributor 6 pulses the code is shifted by one bit shift register 2 and adding one to counter code 4. The counter code determines the bit number at the serial output of shift register 2. If the serial output code of the shift register is equal to one, then it is sent via bus 8 as an interrupt signal to the computer, and at the same time, the outputs of counter 4, controlling the multiplexer, provide switching to the output of the multiplexer of the discharge code of the outputs of the comparison circuit 3, identical to the number bit on the serial output of the register 2 shift. Thus, with the correct operation of the shift register 2 and counter 4, the identical numbers of the digits of the comparison circuit 3 and the shift register 2 are received at the inputs of the comparison element 16. Unit codes at the sequential output of shift register 2 as an interrupt signal are fed to the first interrupt input of the computer 1 and to the first input of the reference element 16. If the unit code is also present at the output, which indicates the correct operation of the counter 4, then the first interrupt signal received by the computer 1 via the bus 8 causes the computer to fix the computer through the bus 9 of the counter code 4. The process of analyzing the code of the shift code 2 continues until overflow counter 4, and when new inconsistencies appear, their fixation is done in the same way.

The appearance at the output of the element 16 comparing the unit code caused by the faults of the counter 4 or the shift register 2 causes an interruption in the computer 1. As a result of this, switching to the inputs of the element 16 comparing the value-polar codes causes an interruption and the computer 1 on the second input 17 interrupts. Since the interrupt on the second input 17 has a higher priority than the interrupt on the first input 8 of the interrupt, the computer 1 detects a malfunction of the system control elements.

31348838

Formula of addressing the address inputs of the multiplexer are connected to the corresponding bits of the system to control the electronic left-hand group of the outputs of the counter, the first device according to the author. St. No. 1005063, о t - the serial output of the register is shifting so that, with ha, is connected to the first input of the element in order to increase the reliability of the comparison, the second input is a coil, the element is compared with the output of the multiplexer, - nor the multiplexer, the informational path of the comparison element is connected to the inputs of which are connected to the corresponding second interrupt input by the digital terminal of the comparison unit, computer, machine.

Claims (1)

Claim System for monitoring electronic devices by ed. St. No. 1005063, characterized in that, in order to increase the reliability of control, a comparison element and a multiplexer are introduced into it, the information inputs of which are connected to the corresponding outputs of the comparison unit, the address inputs of the multiplexer are connected to the corresponding bits of the zero group of counter outputs, the first sequential shift register output connected to the first input of the comparison element, the second input of which is connected to the output of the multiplexer, the output of the comparison element is connected to in the second input of the interrupt linen car.