CN101571830A - Automatic closed loop test system of real-time embedded software - Google Patents
Automatic closed loop test system of real-time embedded software Download PDFInfo
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Abstract
The invention relates to an automatic closed loop test system of real-time embedded software. The system comprises an upper computer, a lower computer connected with the upper computer, and a real-time embedded system to be tested which is connected with the lower computer. The upper computer comprises a test configuration module, a test program generation module and a data communication module; the lower computer comprises a task scheduling module, a test execution engine and an I/O interface support program module; and the test execution engine further comprises a preprocessing module, an on-line processing module and a feedback processing module. In the system, the test execution engine is embedded into a test platform, a test drive module is integrated with the test execution engine of the system so that execution described by the test can drive automatic real-time running of the test.
Description
Technical field
Native system belongs to real-time embedded software automatic test field.
Background technology
Along with science and technology development, real-time embedded software is more and more used in key areas such as Aero-Space, weapons, boats and ships, automobile, Medical Devices, electric power, communication, realizes more and more important function.And software certainly exists and designs and develops defective as the mankind's logical child.According to statistics, in real-time embedded equipment, because the fault that software causes accounts for the 70-80% of whole fault, and the accident that thereupon causes has more caused tremendous loss, as: the accident of European Space Agency's Ariane rocket, the North America has a power failure on a large scale, and the software fault that takes place of U.S.'s Mars probes " courage number " etc.Therefore, the reliability that how to improve real-time embedded software becomes the problem that presses for solution.
Real-time embedded software and hardware relation very close, very high real-time requirement is arranged usually, this just makes conventional means of testing can't satisfy the requirement of embedded software test, automatic test can guarantee real-time embedded software test efficient, sequential is stable, reliable, become the focus of real-time embedded software field tests research.Though the software test automation technology has had years development and obtained numerous achievements in research, and is actually rare at the automatic closed loop test method of real-time embedded software.
At present, the main means of testing of the real-time embedded test of lot of domestic and foreign is manual test or the test mode that drives based on test script, and the hardware architecture of test platform has centralized and distributed two kinds.Realize that real-time embedded software automatic closed loop test needs detecting descriptive language to possess complete descriptive power (can support in the test process the real-time feedback processing mechanism with system under test (SUT)), in addition in the real-time requirement that also must satisfy system under test (SUT) aspect the real-time of hardware and software.Therefore in order to achieve the above object, must be from solving the problem of following several aspects:
1) automatic test is based on the test of programming, and therefore detecting descriptive language general, complete, that have excellent operability and extensibility is one of problem that must solve.
Therefore 2) test inevitable requirement test platform requirement of real time aspect hardware and software of real-time embedded software also is one of problem that must solve in consideration real-time aspect test test execution system hardware (as the selection of CPU and real time operating system etc.) and software (as relating to and the selection of task scheduling algorithm etc. of the detecting descriptive language executive system) structure.
Summary of the invention
The invention provides a kind of automatic closed loop test system of real-time embedded software, described system comprises the test development system that is positioned at host computer, be positioned at the test execution system of slave computer, and host computer links to each other with slave computer, slave computer links to each other with tested real time embedded system, it is characterized in that:
Described test development system comprises the test configurations module, test procedure generation module and data communication module;
Wherein said test configurations module is used for according to described test request, generates the test configurations at system under test (SUT); Described test procedure generation module is used to adopt detecting descriptive language that described test case is changed, and generates test procedure, and after carrying out syntax check test procedure is sent to the data communication module so that download to the test execution system of slave computer; Described data communication module is used for the data communication of host computer and slave computer.
Described test execution system comprises task scheduling modules, test executive engine and I/O interface support program module;
Wherein said task scheduling modules is used for the initiating task scheduling process and finishes test, and test assignment be finished and end of test (EOT) after reclaim resource;
Described test executive engine is used to drive test run, and it further comprises pretreatment module, online treatment module and feedback processing modules;
Described I/O support program module is used to discern the I/O interface of tested real time embedded system;
Described tested real time embedded system receives the test and excitation that slave computer produces, and real time execution also carries out real-time communication by I/O interface and slave computer.
Described test request comprises functional requirement, performance requirement, security requirement and interface requirement.
The I/O of institute interface can be infrared, bluetooth, RS232, RS422, ARINC429, AD/DA ,-among the STD1553 any one.
Described test configurations comprises the configuration of task scheduling clock period, the configuration of host computer and slave computer I/O communication interface and IP address in the test execution system, full test number of tasks and test the configuration of required slave computer buffer size, detecting information is monitoring and explicit configuration in real time, and the I/O communication interface address configuration between system under test (SUT) and the slave computer.
Described detecting descriptive language support customization test assignment is described attribute, support the general characteristic of common structure programming language, support in the real-time embedded software test description to tested embedded device, support the communication mechanism between the embedded device, support the real-time requirement, support test platform device independence and the function of supporting the general standard signal generator.
Described test procedure comprises off-line test program and on-line testing program, and wherein the off-line test program is meant the test procedure that generates in advance before the test starting, and the on-line testing program is the test procedure that generates and load in real time in test process.
Described task scheduling modules is advanced behind test starting, receives lower computer hardware and regularly interrupts, and obtains system's global clock information in each cycle, to guarantee the sequential between each task; The described task scheduling modules test assignment chained list that also Dynamic Maintenance is formed by preprocessor in test process, each clock period all travels through this task list, and according to the state and the attribute of each task, judge which task can be activated, if invalid then carry out that resource reclaims and end scheduling, if effectively then further whether task can be activated:
After the judgement task can be activated, then activate this task, transfer to test executive engine and handle in real time, after task is finished, finishes resource and reclaim, enter the next task search procedure simultaneously; When task can not be activated, judge whether task can delete, if can delete, then directly from the chain list deletion and reclaim resource, if this task unsuppressible-suppression then continues to wait for the arrival of dispatching the clock period next time.
Described pretreatment module, be used for before test starting, finish the preprocessing function of test procedure, form the instruction sequence of each test assignment, described online treatment module and feedback processing modules are used for behind test starting, established test instruction sequence is handled in real time, provided safeguard for driving test run;
Described online treatment module is that the on-line testing routine processes starts a test assignment separately, and enters this task in each clock period, if there is not online test procedure, then this task is in the hang-up waiting status all the time; When having online test procedure, then enter on-line testing routine processes process, finish real time parsing to the on-line testing program, drive test process.
If upper computer selecting defines this on-line testing program implementation time in the line test procedure generative process, then the online treatment module is judging whether to reach the concluding time in the processing procedure in real time, arrive and handle imperfect tense when the concluding time, finish this processing procedure by force, and enter the wait scheduling process; When not having the concluding time to limit, then after normally finishing this processing procedure, reclaim resource.
Described feedback processing modules is behind test starting, according to task dispatch, after certain task is activated and transfers to the processing of execution engine, at first judge whether to exist external feedback to handle, then do not continue to carry out other operation if do not exist, then enter the variable that inquiry needs feedback processing if exist; When this variable does not exist, then provide error message, if this variable exists, then obtain the address that participates in the feedback processing variable in the slave computer in the variable buffer area, and obtain the data of this address of variable, call the feedback processing program then; Judge whether to satisfy feedback condition,,, then carry out corresponding feedback processing and carry out action if satisfy feedback condition if do not satisfy then jump out this feedback processing.
Description of drawings
Fig. 1 is the structural drawing of automatic closed loop test system of real-time embedded software proposed by the invention
Fig. 2 is the implementation step of automatic closed loop test
Fig. 3 is a task dispatch treatment scheme in the test execution system
Fig. 4 is the feedback processing flow process in the closed loop test
Fig. 5 is an on-line testing routine processes flow process
Embodiment
Understand and enforcement the present invention for the ease of those of ordinary skills, the present invention is done further in detail, in depth describes, should be appreciated that enforcement described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention below in conjunction with accompanying drawing.
Based on real-time extension commonly used, that be easy to the quick general programming language C language of grasping, i.e. the design of real-time embedded software detecting descriptive language RT-ESTDL, to satisfy the needs of real-time embedded software test, main extended method is as described below:
Viewpoint based on " task " commonly used in the real-time system software programming, RT-ESTDL adopts the mode based on " test assignment " encapsulation, and allow the customization test assignment to describe attribute, identify as test assignment, test assignment priority, the cycle of test assignment, the beginning of test assignment, concluding time etc.;
Test assignment is for the action description part in the test process, introduce object thought, regard the cross-linking apparatus (containing system under test (SUT) self) of real-time embedded software as " tested object " so that in the test process to the true-time operation of each embedded device and feedback processing in real time.
Provided the characteristic of embedded software test descriptive language RT-ESTDL in the table 1 and to the support scheme of embedded software test.
| Sequence number | Characteristic and support scheme at the embedded software emulation testing |
| 1 | Support the general characteristic of common structure programming language (as the C language),, support arithmetical operation and logical operation, support bit arithmetic, support canonical function etc. as the support process control statement |
| 2 | Support in the real-time embedded software test description to tested embedded device |
| 3 | Increased the communication mechanism (as data and transmission of messages) between the embedded device |
| 4 | Support the real-time requirement, as concurrent, synchronous processing is machine-processed |
| 5 | Support the test platform device independence |
| 6 | Support the function of general standard signal generator |
The characteristic of table 1RT-ESTDL reaches real-time embedded software test support scheme
The test development system of test platform is based on general-purpose operating system Windows, test configurations and test procedure systematic function easily are provided, be convenient to the tested tissue process, the test execution system of test platform adopts the real time operating system vxWorks of current main-stream, wherein task dispatch is responsible for the Real-Time Scheduling of each test assignment in the test process, and bottom programs such as test executive engine and task dispatch merge mutually, are responsible for test driving process.In addition, measuring executing process adopt pre-service-＞mode handled in real time carries out, concrete test processes process is as follows:
Before the test beginning, test execution is carried out engine be embedded in the test platform in advance, and test procedure (based on the test case design) is pre-loaded in test platform test execution system;
Before test starting, at first finish pre-service by test executive engine to test procedure, promptly generate the test instruction collection in advance, to improve the real-time processing speed of follow-up test process;
Behind the test starting, be responsible for handling in real time above-mentioned test instruction collection, drive test execution by task dispatch and test executive engine;
In test process, allow according to the test online generation test procedure of needs and download to test in the test execution system, can finish on-line testing flexibly through the real-time processing of carrying out engine.
The structure of having showed the real-time embedded software automatic closed loop test platform that the present invention proposes among Fig. 1, this structure adopts the point-to-point distributed hardware architecture of HOST (host computer)+Target (slave computer), host computer is connected with gigabit Ethernet with slave computer, specifies as follows:
1) C01 of test development system.This system is positioned at host computer, running environment is Windows, its major function is to load the test request that generates according to the system under test (SUT) document, finish the preceding configuration of test, generate and satisfactoryly meet the test procedure of the detecting descriptive language commonly used of the described characteristic of table 1, and test procedure is downloaded on the slave computer based on RT-ESTDL or other.Allow the tester to start test process,, finish the real-time collecting and the demonstration of data by the data communication interface of host computer and slave computer.Concrete, the test development system comprises the test configurations module, test procedure generation module and data communication module.
2) C02 of test execution system.This system is positioned at slave computer, running environment is vxWroks, and its major function is to receive test procedure and the test command that host computer is downloaded, and passes through task dispatch, handle the feedback in off-line/on-line testing program and the test process in real time, finish the automatic closed loop test.In addition, can discern current real-time embedded field I/O interface commonly used, as infrared, bluetooth, RS232, RS422, ARINC429, AD/DA, MIL-STD1553 etc., to improve the versatility of test platform by the I/O support program.Concrete, the test execution system comprises task scheduling modules, test executive engine and I/O interface support program module;
3) system under test (SUT) C03.This system is real tested embedded system, as mobile phone, avionics system, electric control system etc., be used to receive the test and excitation that slave computer produces, real time execution, and carry out real-time communication by I/O interface (as infrared, bluetooth, RS232, RS422, ARINC429, AD/DA, MIL-STD1553 etc.) with slave computer.
Fig. 2 has provided the implementation step of the automatic closed loop test of the present invention's proposition.
1) loads test request F01.Before test beginning, finish the test request that loading has generated according to the system under test (SUT) document about aspects such as function, performance, security, interfaces by the test development system of host computer.
2) test configurations F02.Based on the test request that has loaded, finish test configurations at specific system under test (SUT), deploy content comprises the configuration of task scheduling clock period, the configuration of host computer and slave computer (test execution system) communication interface IP address, full test number of tasks and test the configuration of required slave computer buffer size, detecting information is monitoring and explicit configuration in real time, and the information such as I/O communication interface address configuration between system under test (SUT) and the slave computer.
3) test procedure (off-line/online) generates F03.According to the test case that has generated, feedback in the time response of clear and definite each test, input, output, the test process and test are by information such as conditions, test case is described with RT-ESTDL or other detecting descriptive languages commonly used that meets the described characteristic of table 1, generates test procedure.The off-line test program is meant the test procedure that generates in advance before the test starting, and the on-line testing program is the test procedure that generates and load in real time in test process.In addition, this step also will be carried out syntax check to the test procedure that has generated, with the mistake of finding that test procedure exists, have only the test procedure by syntax check to download to slave computer by the data communication module.
4) task scheduling F04.The task dispatch program runs on slave computer, after test configurations and test procedure are downloaded and started test, finishes the Real-Time Scheduling task of test assignment, test assignment be finished and end of test (EOT) after reclaim resource, concrete treatment scheme is referring to Fig. 3.
5) carry out engine F05.Carry out engine, run on slave computer, comprise test procedure pretreatment module, on-line testing routine processes module (seeing the process step shown in Fig. 5), test feedback processing modules (seeing the process step shown in Fig. 4) and I/O support program, the major function of carrying out engine is: before test starting, finish the preprocessing function of test procedure (off-line/online), form the instruction sequence of each test assignment; Behind the test starting, established test instruction sequence is handled in real time, provided safeguard for driving test run.
6) test drives F06.Run on slave computer, send to system under test (SUT) with carrying out the real-time input data of handling of engine by real I/O interface, and receive the output data of system under test (SUT) in real time, drive test run.
7) system under test (SUT) F07 is real tested real time embedded system, receives the test and excitation that slave computer produces, real time execution, and carry out real-time communication by I/O interface with slave computer.
Fig. 3 is a task dispatch flow process in the test execution system.
The task dispatch flow process is carried out by task scheduling modules, is described below:
1) behind the test starting, receive lower computer hardware and regularly interrupt, each cycle is all obtained system's global clock information, to guarantee between each task time sort run in accordance with regulations.
2) the test assignment chained list that Dynamic Maintenance is formed by preprocessor in test process, each clock period all travels through this task list, and according to the state and the attribute of each task, judge which task can be activated, if invalid then carry out that resource reclaims and end scheduling, if effectively then further whether task can be activated:
After the judgement task can be activated, then activate this task, transfer to the execution engine and handle in real time, after task is finished, finishes resource and reclaim, enter the next task search procedure simultaneously.
When task can not be activated, judge whether task can delete, if can delete, then directly from the chain list deletion and reclaim resource; If this task unsuppressible-suppression then continues to wait for the arrival of dispatching the clock period next time.
Fig. 4 is the feedback processing flow process in the closed loop test.
Feedback processing flow process in the closed loop test is carried out by feedback processing modules, is described below:
1) behind the test starting, according to task dispatch, after certain task is activated and transfers to the processing of execution engine, at first judge whether to exist external feedback to handle, then do not continue to carry out other operation if do not exist, then enter the variable information that inquiry needs feedback processing if exist,, then provide error message when this variable does not exist; If this variable exists, then:
2) obtain in the slave computer address that participates in the feedback processing variable in the variable buffer area, and obtain the data of this address of variable, call the feedback processing program then, judge whether to satisfy feedback condition then, if do not satisfy then jump out this feedback processing; If satisfy feedback condition, then:
3) execution of carrying out corresponding or predetermined feedback processing is moved.
Fig. 5 has provided on-line testing routine processes flow process.
On-line testing routine processes flow process is carried out by the online treatment module, is described below:
1) in order to finish the automatic closed loop test of real-time embedded software better, improve the dirigibility and the controllability of test, simultaneously for ease of controlling the implementation of online test procedure, in host computer on-line testing program generative process, allow the on-line testing program implementation time is added necessary qualification, as limit it and regularly finish.
2) the online treatment module of execution engine is that the on-line testing routine processes has started a test assignment separately, and enters this task in each clock period, if there is not online test procedure, then this task is in the hang-up waiting status all the time.
3) when having online test procedure, then enter the on-line testing routine processes process of carrying out engine, finish real time parsing to the on-line testing program, drive test process.
3) when the on-line testing program exists the concluding time to limit, in real-time processing procedure, also need judge whether to reach the concluding time, arrive and handle imperfect tense when the concluding time, carry out engine and will finish this processing procedure by force, and enter the wait scheduling process.After having when restriction concluding time, then normally finishing this processing procedure, do not reclaim resource.
The present invention can bring following beneficial effect:
1) improves the automatization level that real-time embedded software is tested, improve versatility, the portability and maintainable of test program. Adopt the present invention can effectively overcome the special-purpose poor shortcoming of real-time embedded software test platform versatility, so that the test program code that the tester writes based on the descriptive language of the support correlation properties such as RT-ESTDL can support the test platform of the execution engine of RT-ESTDL characteristic to carry out at all, thereby make test program not be subject to specific test platform, thereby improved the automatization level of test, and so that the versatility of test program, portability and maintainability also effectively improve.
2) the test flexibility obtains performance. Adopt the present invention, except the automatic operation of the off-line test program of the descriptive language supporting to have write, support correlation properties based on RT-ESTDL etc., also support the tester according to the actual needs of test, real-time in-line testing loads test program, in order to better control test process, thereby greatly improved the flexibility of testing.
3) reduce tester's workload. Because the present invention is a kind of real-time extension for general programming language, therefore both guaranteed that original characteristic of speech sounds can fully support, also so that the detecting descriptive language after the real-time extension is more suitable for the real-time embedded software test description, make the tester use simpler, have more operability, thereby reduce tester's workload.
4) reduce testing cost, improve development efficiency. Adopt the detecting descriptive language of extended mode, demonstrated fully the adaptive capacity that test request is constantly updated, software or system for an incremental, iterative exploitation, provide a kind of general method of testing support to the tester, can pass through the multiplexing of test program, reduce to greatest extent testing cost, improve development efficiency.
Claims (10)
1, a kind of automatic closed loop test system of real-time embedded software, described system comprises the test development system that is positioned at host computer, be positioned at the test execution system of slave computer, and host computer links to each other with slave computer, slave computer links to each other with tested real time embedded system, it is characterized in that:
Described test development system comprises the test configurations module, test procedure generation module and data communication module;
Wherein said test configurations module is used for according to described test request, generates the test configurations at system under test (SUT); Described test procedure generation module is used to adopt detecting descriptive language that described test case is changed, and generates test procedure, and after carrying out syntax check test procedure is sent to the data communication module so that download to the test execution system of slave computer; Described data communication module is used for the data communication of host computer and slave computer.
Described test execution system comprises task scheduling modules, test executive engine and I/O interface support program module;
Wherein said task scheduling modules is used for the initiating task scheduling process and finishes test, and test assignment be finished and end of test (EOT) after reclaim resource;
Described test executive engine is used to drive test run, and it further comprises pretreatment module, online treatment module and feedback processing modules;
Described I/O support program module is used to discern and support the I/O interface of tested real time embedded system;
Described tested real time embedded system receives the test and excitation that slave computer produces, and real time execution also carries out real-time communication by I/O interface and slave computer.
2, according to the system described in the claim 1, described test request comprises functional requirement, performance requirement, security requirement and interface requirement.
3, according to the system described in the claim 1, described I/O interface can be any one among infrared, bluetooth, RS232, RS422, ARINC429, AD/DA, the MIL-STD1553.
4, according to the system described in the claim 1, described test configurations comprises the configuration of task scheduling clock period, the configuration of host computer and slave computer I/O communication interface and IP address in the test execution system, full test number of tasks and test the configuration of required slave computer buffer size, detecting information is monitoring and explicit configuration in real time, and the I/O communication interface address configuration between system under test (SUT) and the slave computer.
5, according to any one described system among the claim 1-4, described detecting descriptive language support customization test assignment is described attribute, support the general characteristic of common structure programming language, support in the real-time embedded software test description to tested embedded device, support the communication mechanism between the embedded device, support the real-time requirement, support test platform device independence and the function of supporting the general standard signal generator.
6, according to any one described system among the claim 1-5, described test procedure comprises off-line test program and on-line testing program, wherein the off-line test program is meant the test procedure that generates in advance before the test starting, and the on-line testing program is the test procedure that generates and load in real time in test process.
7, according to any one described system among the claim 1-6, described task scheduling modules is advanced behind test starting, receives lower computer hardware and regularly interrupts, and obtains system's global clock information in each cycle, to guarantee the sequential between each task; The described task scheduling modules test assignment chained list that also Dynamic Maintenance is formed by preprocessor in test process, each clock period all travels through this task list, and according to the state and the attribute of each task, judge which task can be activated, if invalid then carry out that resource reclaims and end scheduling, if effectively then further whether task can be activated:
After the judgement task can be activated, then activate this task, transfer to test executive engine and handle in real time, after task is finished, finishes resource and reclaim, enter the next task search procedure simultaneously; When task can not be activated, judge whether task can delete, if can delete, then directly from the chain list deletion and reclaim resource, if this task unsuppressible-suppression then continues to wait for the arrival of dispatching the clock period next time.
8, according to any one described system among the claim 1-7, described pretreatment module, be used for before test starting, finish the preprocessing function of test procedure, form the instruction sequence of each test assignment, described online treatment module and feedback processing modules are used for behind test starting, established test instruction sequence is handled in real time, provide safeguard for driving test run, described feedback processing modules is behind test starting, according to task dispatch, after certain task is activated and transfers to the processing of execution engine, at first judge whether to exist external feedback to handle, then do not continue to carry out other operation, then enter the variable that inquiry needs feedback processing if exist if do not exist; When this variable does not exist, then provide error message, if this variable exists, then obtain the address that participates in the feedback processing variable in the slave computer in the variable buffer area, and obtain the data of this address of variable, call the feedback processing program then; Judge whether to satisfy feedback condition,,, then carry out corresponding feedback processing and carry out action if satisfy feedback condition if do not satisfy then jump out this feedback processing.
9, method according to claim 8, described online treatment module is that the on-line testing routine processes starts a test assignment separately, and enter this task in each clock period, if there is not online test procedure, then this task is in the hang-up waiting status all the time; When having online test procedure, then enter on-line testing routine processes process, finish real time parsing to the on-line testing program, drive test process.
10, system according to claim 9, if upper computer selecting defines this on-line testing program implementation time in the line test procedure generative process, then the online treatment module is judging whether to reach the concluding time in the processing procedure in real time, arrive and handle imperfect tense when the concluding time, finish this processing procedure by force, and enter the wait scheduling process; When not having the concluding time to limit, then after normally finishing this processing procedure, reclaim resource.
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| CN110825624A (en) * | 2019-08-06 | 2020-02-21 | 厦门亿联网络技术股份有限公司 | Module testing system and method of embedded equipment |
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