CN106646010A - Testing system and testing method for discrete input and output signals - Google Patents

Testing system and testing method for discrete input and output signals Download PDF

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Publication number
CN106646010A
CN106646010A CN201510740780.8A CN201510740780A CN106646010A CN 106646010 A CN106646010 A CN 106646010A CN 201510740780 A CN201510740780 A CN 201510740780A CN 106646010 A CN106646010 A CN 106646010A
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CN
China
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discrete
output signal
electronic equipment
measured
chip
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CN201510740780.8A
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Chinese (zh)
Inventor
马先明
陈志列
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北京市研祥兴业国际智能科技有限公司
研祥智能科技股份有限公司
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Priority to CN201510740780.8A priority Critical patent/CN106646010A/en
Publication of CN106646010A publication Critical patent/CN106646010A/en

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Abstract

The invention provides a testing system and a testing method for discrete input and output signals. The testing system comprises a master control chip, at least one discrete input signal processing module and at least one discrete output signal processing module. The master control chip comprises an I2C controller. One end of the discrete input signal processing module and one end of the discrete output signal processing module are connected with to-be-tested electronic equipment, and the other end of the discrete input signal processing module and the other end of the discrete output signal processing module are connected with the I2C controller. The discrete input signal processing module is used for receiving a discrete output signal of the to-be-tested electronic equipment and uses the discrete output signal as the discrete input signal. Furthermore through controlling of the I2C controller, the discrete input signal processing module performs processing on the discrete input signal for keeping the level sate of the discrete input signal unchanged. The discrete output signal processing module is used for generating a discrete output signal through controlling of the I2C controller, performing processing on the discrete output signal for keeping the level state unchanged, and transmitting the discrete output signal to the to-be-tested electronic equipment as the discrete input signal of the to-be-tested electronic equipment.

Description

The test system and method for testing of discrete input/output signal

Technical field

The present invention relates to equipment technical field of measurement and test, more particularly to a kind of test system of discrete input/output signal System and method of testing.

Background technology

The signal of vehicle-mounted, airborne, carrier-borne discrete control input output equipment is responsible for processing the control of electronic equipment Signal processed, its discrete control input signal is responsible for vehicle-mounted, airborne, Shipborne Electronic Equipment the status information of collection Or the control information of reception associated electronic device;Discrete controlled output signal is responsible for vehicle-mounted, airborne, carrier-borne Electronic equipment sends control information or returns the status information of associated electronic device.

Vehicle-mounted, airborne, Shipborne Electronic Equipment operation level is often with the operation level of general industry equipment not Together, it is impossible to by the discrete control input output equipment signal of general industry equipment directly with vehicle-mounted, airborne, warship The signal connection of electronic equipment is carried, otherwise can badly damaged associated electronic device.

Operating voltage in some industrial environments is often to need between 110V, and electronic equipment by discrete defeated Enter signal and output signal to enter row data communication, conditional access and control etc., electronic equipment is tested It is unpractical that Shi Ruguo goes industry spot actual test every time.Additionally, vehicle-mounted, airborne, carrier-borne electronics The generation of the discrete control input signal of equipment and output signal needs strict timing control signal and enable signal Cooperation, and the discrete control input signal of general industry equipment and output signal are simple signal input And signal output, SECO and the enable of discrete control input output signal are not related at all, it is impossible to met Actual testing requirement.

The content of the invention

The present invention provides a kind of test system and method for testing of discrete input/output signal, can be according to test Demand produces discrete input signal and output signal, and electronic equipment to be measured is tested.

On the one hand, the present invention provides a kind of test system of discrete input signal, including main control chip, at least One discrete input signal processing module and at least one discrete output signal processing module, the main control chip Including I2C controllers;One end of the discrete input signal processing module is connected with electronic equipment to be measured, separately One end is connected with the I2C controllers;One end of the discrete output signal processing module sets with electronics to be measured Standby connection, the other end is connected with the I2C controllers;

The discrete input signal processing module is used to receive the discrete output signal of electronic equipment to be measured, by institute The discrete output signal of electronic equipment to be measured is stated as discrete input signal, and in the control of the I2C controllers Under system, the discrete input signal is processed so that the level state of the discrete input signal keeps It is constant;

The discrete output signal processing module is used under the control of the I2C controllers, produces discrete defeated Go out signal, and the discrete output signal is processed so that the level state of the discrete output signal Keep constant, the discrete output signal is sent to electronic equipment to be measured, as the electronic equipment to be measured Discrete input signal.

Optionally, the discrete input signal processing module includes the first control chip, the first I/O chip, thoroughly Bright D flip-flop and optocoupler;The input of the optocoupler is connected with electronic equipment to be measured, output end with it is described The input connection of transparent D flip-flop;The output end of the transparent D flip-flop and an IO The input connection of chip, Enable Pin is connected with the output end of first control chip;The I2C controls Device is connected with first control chip and the first I/O chip;

The discrete output signal of the electronic equipment to be measured is discrete as the discrete input signal processing module Input signal, the input of optocoupler output described in Jing to the transparent D flip-flop, the first control core Piece produces timing control signal under the control of the I2C controllers, triggers the enable of the D flip-flop End so that the discrete input signal is correctly latched and transmitted to the output end of the transparent D flip-flop, First I/O chip is gathered the discrete input signal by the output end of the transparent D flip-flop and is exported.

Optionally, the discrete output signal processing module includes the second control chip, the second I/O chip, side Along triggering D flip-flop and Darlington transistor;The I2C controllers and second control chip and the 2nd IO Chip connects, and the output end of second control chip connects with the Enable Pin of the edging trigger D flip-flop Connect, the output end of second I/O chip is connected with the input of the edging trigger D flip-flop, described The output end of edging trigger D flip-flop is connected with the input of the Darlington transistor, the Darlington transistor Output end is connected with electronic equipment to be measured;

Second I/O chip produces discrete output signal under the control of the I2C controllers, and sends To the input of the transparent D flip-flop, control of second control chip in the I2C controllers Lower generation timing control signal, triggers the Enable Pin of the D flip-flop so that the discrete output signal Correctly latch and transmit to the output end of the transparent D flip-flop, and send out after Darlington transistor is processed described in Electronic equipment to be measured is delivered to, as the discrete input signal of the electronic equipment to be measured.

Optionally, the main control chip is south bridge HM65.

Optionally, first control chip is FPGA or MCU;First I/O chip is PCA9555.

Optionally, second control chip is FPGA or MCU;Second I/O chip is PCA9555.

On the other hand, the present invention provides a kind of method of testing of discrete input signal, including:

Discrete input signal processing module receives the discrete output signal of electronic equipment to be measured, by the electricity to be measured The discrete output signal of sub- equipment as discrete input signal, and under the control of I2C controllers, to described Discrete input signal is processed so that the level state of the discrete input signal keeps constant;

Discrete output signal processing module produces discrete output signal under the control of I2C controllers, and right The discrete output signal is processed so that the level state of the discrete output signal keeps constant, will The discrete output signal is sent to electronic equipment to be measured, and the discrete input as the electronic equipment to be measured is believed Number;

Wherein, the I2C controllers be located at main control chip in, the discrete input signal processing module and from Scattered output signal processing module is at least one, one end of the discrete input signal processing module with it is to be measured Electronic equipment connects, and the other end is connected with the I2C controllers;The discrete output signal processing module One end is connected with electronic equipment to be measured, and the other end is connected with the I2C controllers.

Optionally, the discrete input signal processing module includes the first control chip, the first I/O chip, thoroughly Bright D flip-flop and optocoupler;

The discrete input signal processing module receives the discrete output signal of electronic equipment to be measured, treats described The discrete output signal of electronic equipment is surveyed as discrete input signal, and under the control of I2C controllers, it is right The discrete input signal is processed so that the level state of the discrete input signal keeps constant, bag Include:

The discrete output signal of the electronic equipment to be measured is discrete as the discrete input signal processing module Input signal, input of the optocoupler output to the transparent D flip-flop described in Jing;

First control chip produces timing control signal under the control of the I2C controllers, triggers institute State the Enable Pin of D flip-flop so that the discrete input signal is correctly latched and transmitted to the transparent D The output end of D-flip flop;

First I/O chip gathers the discrete input signal simultaneously by the output end of the transparent D flip-flop Output.

Optionally, the discrete output signal processing module includes the second control chip, the second I/O chip, side Along triggering D flip-flop and Darlington transistor;

The discrete output signal processing module produces discrete output signal under the control of I2C controllers, And the discrete output signal is processed so that the level state of the discrete output signal keeps constant, The discrete output signal is sent to electronic equipment to be measured, as the discrete input of the electronic equipment to be measured Signal, including:

Second I/O chip produces discrete output signal under the control of the I2C controllers, and sends To the input of the transparent D flip-flop;

Second control chip produces timing control signal under the control of the I2C controllers, triggers institute State the Enable Pin of D flip-flop so that the discrete output signal is correctly latched and transmitted to the transparent D The output end of D-flip flop;

The discrete output signal is sent to electronic equipment to be measured, as described described in after Darlington transistor is processed The discrete input signal of electronic equipment to be measured.

The test system and method for testing of discrete input/output signal provided in an embodiment of the present invention, discrete input Signal processing module receives the discrete output signal of electronic equipment to be measured, by the discrete of the electronic equipment to be measured Output signal as discrete input signal, and under the control of I2C controllers, to the discrete input signal Processed so that the level state of the discrete input signal keeps constant;Discrete output signal processes mould Block under the control of I2C controllers, produce discrete output signal, and to the discrete output signal at Reason so that the level state of the discrete output signal keeps constant, by the discrete output signal send to Electronic equipment to be measured, as the discrete input signal of the electronic equipment to be measured.Compared with prior art, originally Invention can be believed the discrete output signal of electronic equipment to be measured as the input of discrete input signal processing module Number, the output signal of discrete output signal processing module is sent to electronic equipment to be measured and as electronics to be measured The input signal of equipment, by these signals, electronic equipment to be measured can obtain vehicle-mounted, airborne, carrier-borne electricity The status information of sub- equipment simulating is received from vehicle-mounted, airborne, Shipborne Electronic Equipment simulation control letter Breath, is tested such that it is able to simulate vehicle-mounted, airborne, on-board equipment device under test.

Description of the drawings

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to implementing Example or the accompanying drawing to be used needed for description of the prior art are briefly described, it should be apparent that, retouch below Accompanying drawing in stating is only some embodiments of the present invention, for those of ordinary skill in the art, not On the premise of paying creative work, can be with according to these other accompanying drawings of accompanying drawings acquisition.

The structural representation of the test system of the discrete input/output signal that Fig. 1 is provided for one embodiment of the invention;

The structured flowchart of the test system of the discrete input/output signal that Fig. 2 is provided for another embodiment of the present invention;

Fig. 3 be discrete input/output signal provided in an embodiment of the present invention method of testing in discrete input signal Process flow figure;

Fig. 4 be discrete input/output signal provided in an embodiment of the present invention method of testing in discrete output signal Process flow figure;

Fig. 5 is the test interface of the test system of discrete input/output signal provided in an embodiment of the present invention.

Specific embodiment

To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the present invention Accompanying drawing in embodiment, is clearly and completely described to the technical scheme in the embodiment of the present invention, it is clear that Described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on this Embodiment in bright, the institute that those of ordinary skill in the art are obtained under the premise of creative work is not made There is other embodiment, belong to the scope of protection of the invention.

The embodiment of the present invention provides a kind of test system of discrete input/output signal, as shown in figure 1, described System includes main control chip, at least one discrete input signal processing module and at least one discrete output signal Processing module, the main control chip includes I2C controllers;One end of the discrete input signal processing module It is connected with electronic equipment to be measured, the other end is connected with the I2C controllers;The discrete output signal is processed One end of module is connected with electronic equipment to be measured, and the other end is connected with the I2C controllers;

The discrete input signal processing module is used to receive the discrete output signal of electronic equipment to be measured, by institute The discrete output signal of electronic equipment to be measured is stated as discrete input signal, and in the control of the I2C controllers Under system, the discrete input signal is processed so that the level state of the discrete input signal keeps It is constant;

The discrete output signal processing module is used under the control of the I2C controllers, produces discrete defeated Go out signal, and the discrete output signal is processed so that the level state of the discrete output signal Keep constant, the discrete output signal is sent to electronic equipment to be measured, as the electronic equipment to be measured Discrete input signal.

The embodiment of the present invention also provides a kind of test system of discrete input/output signal, as shown in Fig. 2 southern Bridge HM65 by the I2C controller Jing I2C buses that carry respectively with control chip A, I/O chip B, control Coremaking piece C and I/O chip D connects;Wherein, control chip A and control chip C can adopt FPGA Or single-chip microcomputer (MCU) is realizing, I/O chip B and I/O chip D can using PCA9555 chips come Realize;

The input of the optocoupler is using the discrete output signal of electronic equipment to be measured as discrete input signal, institute State the output end of optocoupler to be connected with the input (D0~D15) of transparent D flip-flop;The transparent D types The output end (Q0~Q15) of trigger is connected with the input of I/O chip B, Enable Pin (/OE and/LE) It is connected with the output end of control chip A;

The output end of control chip C is connected with the Enable Pin (/OE and/LE) of edging trigger D flip-flop, The output end of I/O chip D is connected with the input (D0~D15) of the edging trigger D flip-flop, institute The output end (Q0~Q15) for stating edging trigger D flip-flop is connected with the input of Darlington transistor, described The output end output discrete output signal of Darlington transistor, as the discrete input signal of electronic equipment to be measured.

Wherein, south bridge HM65 is connected to the I2C equipment in the bus by I2C bus marcos and configuration, The register for configuring is needed in the I2C controllers of south bridge HM65 comprising status register STS, control deposit Device CNT, command register CMD, address register SLVA and data register D0.

I/O chip B and I/O chip D receives the control command of the I2C controllers from south bridge HM65, should I/O chip has two port port 0 and port 1, and each port includes 8 tunnel input and output.The He of command word 0 1 represents the input register for accessing port 0 and port 1;Command word 2 and 3 is represented and accesses port 0 and port 1 Output register;Command word 4 and 5 represents the polarity register for accessing port 0 and port 1;Command word 6 The configuration register for accessing port 0 and port 1 is represented with 7, configuration register is arranged to into 1 expression will correspondence Pin is arranged to input pattern, configuration register is arranged to into 0 expression correspondence pin is arranged to into output mode.

Discrete input signal shown in the output signal namely Fig. 2 of electronic equipment to be measured, usually high voltage Working range, high-tension discrete input signal after optocoupler, using the output signal of optocoupler as transparent D The input signal of D-flip flop.Optocoupler has not only acted as the effect of isolation, while also by high voltage operation scope Low voltage operating scope is transitioned into, vehicle-mounted, airborne, Shipborne Electronic Equipment is set and have protective effect, prevented The punch through damage of electronic equipment.

Vehicle-mounted, airborne, Shipborne Electronic Equipment input signal passes through from the output signal shown in Fig. 2 These signals, electronic equipment to be measured can obtain the status information of vehicle-mounted, airborne Shipborne Electronic Equipment simulation Or receive from vehicle-mounted, airborne, Shipborne Electronic Equipment simulation control information.

As shown in Fig. 2 I/O chip B is arranged to input pattern, it receives and carrys out the defeated of self-induced transparency D flip-flop Go out the output signal at end (Q0~Q15), and transparent D flip-flop is inputted end signal (D0~D15) Correctly latch and be transferred to the process of output end (Q0~Q15) need at it/OE and during effective/LE signals Triggering, and control chip A is exactly to meet the SECO to transparent D flip-flop/OE and/LE signals.

The embodiment of the present invention also provides a kind of method of testing of discrete input signal, and Fig. 3 show of the invention real The process flow figure of discrete input signal in the method for testing of the discrete input signal that example offer is provided.Such as Fig. 3 It is shown, the test system of the discrete input/output signal with reference to shown in Fig. 2, the place of the discrete input signal Reason method comprises the steps:

S31, I/O chip B are with input pattern work;

Specifically, I/O chip B is arranged to by input pattern by the I2C controllers of south bridge HM65, while Control chip A is modeled to an I2C equipment, the same life for receiving the I2C controllers from south bridge HM65 Order and control;

S32, the input of discrete input signal Jing optocouplers output to transparent D flip-flop;

Specifically, input (D0~D15) of the discrete input signal Jing optocouplers output to transparent D flip-flop;

S33, control chip A export low level signal;

Specifically, control chip A exports an effective low level signal;

S34, transparent D flip-flop /LE ,/OE signals be effective;

S35, I/O chip B gather the output end signal of transparent D flip-flop and export;

Specifically, the signal of the output end (Q0~Q15) of transparent D flip-flop will be locked by I/O chip B Gather and export;

S36, the output end signal for obtaining I/O chip B;

Specifically, the Hes of input port port 0 that the I2C controllers of south bridge HM65 pass through access I/O chip B Port 1 is obtained with current vehicle-mounted, airborne, Shipborne Electronic Equipment discrete input signal.

Fig. 4 show discrete output signal in the method for testing of discrete input signal provided in an embodiment of the present invention Process flow figure.As shown in figure 4, the test system of the discrete input/output signal with reference to shown in Fig. 2 System, the processing method of the discrete output signal comprises the steps:

S41, I/O chip D are with output mode work;

Specifically, when needing to send discrete output signal to electronic equipment to be measured, by south bridge HM65's I/O chip D is arranged to output mode by I2C controllers, while control chip C is modeled to an I2C equipment, The same order and control for receiving the I2C controllers from south bridge HM65;

S42, control chip C output low level signal enable edging trigger D flip-flop /OE signals;

Specifically, edging trigger D flip-flop /OE signals be Low level effective, and CLK signal be side It is effective along triggering rising edge;

S43, control signal export the input to I/O chip D and export to edging trigger D flip-flop Input;

Specifically, control chip C outputs are connected by edging trigger D by the I2C controllers of south bridge HM65 D-flip flop /OE signals be constantly in low level, i.e. edging trigger D flip-flop /OE signals always In effective status;

S44, control chip C output rising edge signal enable edging trigger D flip-flop /CLK signal;

Specifically, the output end pin of I/O chip D is arranged to by institute by the I2C controllers of south bridge HM65 The low and high level control signal for needing, exports and gives the input of edging trigger D flip-flop (D0~D15);Together When control chip C export an edge rising edge signal be given to edging trigger D flip-flop /CLK signal;

S45, edging trigger D flip-flop collection input end signal are simultaneously exported to Darlington transistor;

Specifically, edging trigger D flip-flop is made to gather input (D0~D15) signal, output is arrived defeated Go out end (Q0~Q15), and export to Darlington transistor;

S46, Jing Darlington transistor improve driving force after discrete output signal is exported;

Specifically, discrete output signal is exported after Darlington transistor improves driving force, is sent to electricity to be measured Sub- equipment, as the discrete input signal of electronic equipment to be measured.

Fig. 5 show the test interface of the test system of discrete input/output signal provided in an embodiment of the present invention. Wherein, the top two-way is the discrete output signal for receiving electronic equipment to be measured as the discrete input and output The discrete input signal of the test system of signal, bottom two-way is by the survey of the discrete input/output signal The output signal of test system is exported to electronic equipment to be measured and as its discrete input signal.On test interface Level marks show the level state of currently received discrete input/output signal interface.

The test system and method for testing of discrete input/output signal provided in an embodiment of the present invention, will can treat The input signal of the discrete output signal as discrete input signal processing module of electronic equipment is surveyed, will be discrete defeated The output signal for going out signal processing module is sent to electronic equipment to be measured and as the input letter of electronic equipment to be measured Number, by these signals, electronic equipment to be measured can obtain vehicle-mounted, airborne, Shipborne Electronic Equipment simulation Status information is received from vehicle-mounted, airborne, Shipborne Electronic Equipment simulation control information, such that it is able to Simulate vehicle-mounted, airborne, on-board equipment device under test to be tested.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited to This, any those familiar with the art the invention discloses technical scope in, can readily occur in Change or replacement, all should be included within the scope of the present invention.Therefore, protection scope of the present invention Should be defined by scope of the claims.

Claims (9)

1. a kind of test system of discrete input/output signal, it is characterised in that including main control chip, at least One discrete input signal processing module and at least one discrete output signal processing module, the main control chip Including I2C controllers;One end of the discrete input signal processing module is connected with electronic equipment to be measured, separately One end is connected with the I2C controllers;One end of the discrete output signal processing module sets with electronics to be measured Standby connection, the other end is connected with the I2C controllers;
The discrete input signal processing module is used to receive the discrete output signal of electronic equipment to be measured, by institute The discrete output signal of electronic equipment to be measured is stated as discrete input signal, and in the control of the I2C controllers Under system, the discrete input signal is processed so that the level state of the discrete input signal keeps It is constant;
The discrete output signal processing module is used under the control of the I2C controllers, produces discrete defeated Go out signal, and the discrete output signal is processed so that the level state of the discrete output signal Keep constant, the discrete output signal is sent to electronic equipment to be measured, as the electronic equipment to be measured Discrete input signal.
2. the test system of discrete input/output signal according to claim 1, it is characterised in that institute State discrete input signal processing module including the first control chip, the first I/O chip, transparent D flip-flop and Optocoupler;The input of the optocoupler is connected with electronic equipment to be measured, output end and the transparent D flip-flop Input connection;The output end of the transparent D flip-flop is connected with the input of first I/O chip, Enable Pin is connected with the output end of first control chip;The I2C controllers and the described first control core Piece and the first I/O chip connect;
The discrete output signal of the electronic equipment to be measured is discrete as the discrete input signal processing module Input signal, the input of optocoupler output described in Jing to the transparent D flip-flop, the first control core Piece produces timing control signal under the control of the I2C controllers, triggers the enable of the D flip-flop End so that the discrete input signal is correctly latched and transmitted to the output end of the transparent D flip-flop, First I/O chip is gathered the discrete input signal by the output end of the transparent D flip-flop and is exported.
3. the test system of discrete input/output signal according to claim 1, it is characterised in that institute Discrete output signal processing module is stated including the second control chip, the second I/O chip, the triggering of edging trigger D types Device and Darlington transistor;The I2C controllers are connected with second control chip and the second I/O chip, described The output end of the second control chip is connected with the Enable Pin of the edging trigger D flip-flop, the 2nd IO The output end of chip is connected with the input of the edging trigger D flip-flop, and the edging trigger D types are touched The output end for sending out device is connected with the input of the Darlington transistor, the output end of the Darlington transistor and electricity to be measured Sub- equipment connection;
Second I/O chip produces discrete output signal under the control of the I2C controllers, and sends To the input of the transparent D flip-flop, control of second control chip in the I2C controllers Lower generation timing control signal, triggers the Enable Pin of the D flip-flop so that the discrete output signal Correctly latch and transmit to the output end of the transparent D flip-flop, and send out after Darlington transistor is processed described in Electronic equipment to be measured is delivered to, as the discrete input signal of the electronic equipment to be measured.
4. the test system of discrete input/output signal according to any one of claim 1 to 3, its It is characterised by, the main control chip is south bridge HM65.
5. the test system of discrete input/output signal according to claim 2, it is characterised in that institute The first control chip is stated for FPGA or MCU;First I/O chip is PCA9555.
6. the test system of discrete input/output signal according to claim 3, it is characterised in that institute The second control chip is stated for FPGA or MCU;Second I/O chip is PCA9555.
7. a kind of method of testing of discrete input/output signal, it is characterised in that include:
Discrete input signal processing module receives the discrete output signal of electronic equipment to be measured, by the electricity to be measured The discrete output signal of sub- equipment as discrete input signal, and under the control of I2C controllers, to described Discrete input signal is processed so that the level state of the discrete input signal keeps constant;
Discrete output signal processing module produces discrete output signal under the control of I2C controllers, and right The discrete output signal is processed so that the level state of the discrete output signal keeps constant, will The discrete output signal is sent to electronic equipment to be measured, and the discrete input as the electronic equipment to be measured is believed Number;
Wherein, the I2C controllers be located at main control chip in, the discrete input signal processing module and from Scattered output signal processing module is at least one, one end of the discrete input signal processing module with it is to be measured Electronic equipment connects, and the other end is connected with the I2C controllers;The discrete output signal processing module One end is connected with electronic equipment to be measured, and the other end is connected with the I2C controllers.
8. the method for testing of discrete input/output signal according to claim 7, it is characterised in that institute State discrete input signal processing module including the first control chip, the first I/O chip, transparent D flip-flop and Optocoupler;
The discrete input signal processing module receives the discrete output signal of electronic equipment to be measured, treats described The discrete output signal of electronic equipment is surveyed as discrete input signal, and under the control of I2C controllers, it is right The discrete input signal is processed so that the level state of the discrete input signal keeps constant, bag Include:
The discrete output signal of the electronic equipment to be measured is discrete as the discrete input signal processing module Input signal, input of the optocoupler output to the transparent D flip-flop described in Jing;
First control chip produces timing control signal under the control of the I2C controllers, triggers institute State the Enable Pin of D flip-flop so that the discrete input signal is correctly latched and transmitted to the transparent D The output end of D-flip flop;
First I/O chip gathers the discrete input signal simultaneously by the output end of the transparent D flip-flop Output.
9. the method for testing of discrete input/output signal according to claim 7, it is characterised in that institute Discrete output signal processing module is stated including the second control chip, the second I/O chip, the triggering of edging trigger D types Device and Darlington transistor;
The discrete output signal processing module produces discrete output signal under the control of I2C controllers, And the discrete output signal is processed so that the level state of the discrete output signal keeps constant, The discrete output signal is sent to electronic equipment to be measured, as the discrete input of the electronic equipment to be measured Signal, including:
Second I/O chip produces discrete output signal under the control of the I2C controllers, and sends To the input of the transparent D flip-flop;
Second control chip produces timing control signal under the control of the I2C controllers, triggers institute State the Enable Pin of D flip-flop so that the discrete output signal is correctly latched and transmitted to the transparent D The output end of D-flip flop;
The discrete output signal is sent to electronic equipment to be measured, as described described in after Darlington transistor is processed The discrete input signal of electronic equipment to be measured.
CN201510740780.8A 2015-11-02 2015-11-02 Testing system and testing method for discrete input and output signals CN106646010A (en)

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