CN105487862B - Multi-channel waveform synchronism output method based on PXI bus multi-function data acquisition card - Google Patents
Multi-channel waveform synchronism output method based on PXI bus multi-function data acquisition card Download PDFInfo
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- CN105487862B CN105487862B CN201510836286.1A CN201510836286A CN105487862B CN 105487862 B CN105487862 B CN 105487862B CN 201510836286 A CN201510836286 A CN 201510836286A CN 105487862 B CN105487862 B CN 105487862B
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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Abstract
The invention discloses a kind of multi-channel waveform synchronism output methods based on PXI bus multi-function data acquisition card, for solving the technical problem of existing multi-channel waveform synchronism output method synchronism output performance difference.Technical solution is using modularization, Hierarchical Design thinking, utilize the serviced component of COM technology building layering, the application layer of software, operation layer, service layer are individually encapsulated, respectively in the application layer of inspection software, operation layer and service layer building difference component, corresponding power function is encapsulated in assembly, so during the test multi-functional acquisition module simulation output different wave signal when, need to only modify the setup parameter of corresponding assembly waveform output function；When exporting direct current signal, only the frequency parameter of corresponding assembly waveform output function need to be set as 0, it solves the technical problem that multi-function data acquisition card multi-analog output channel is unable to synchronism output different type waveform signal, improves multichannel different type waveform signal synchronism output performance.
Description
Technical field
The present invention relates to a kind of multi-channel waveform synchronism output methods, in particular to a kind of to be adopted based on the total line multi-function of PXI
The multi-channel waveform synchronism output method of truck.
Background technique
The multi-function data acquisition card of PXI bus is due to itself acquisition of integrated simulation amount, analog output, number I/O and multichannel
The multiple functions such as Timer/Counter are widely used in automatic test field, can meet commonly used demand, however, due to this
Kind multi-function data acquisition card main signals such as its clock signal, trigger signal and onboard Buffer management signal in design are multiplexings
Dependent relationship, multi-analog output channel can only the same type of waveform signal of synchronism output, be unable to synchronism output
Different types of waveform signal is unable to satisfy the different types of waveform signal application of synchronism output on one piece of multi-function data acquisition card
Demand.Using multi-function data acquisition card when needing to export direct current signal, first carry out direct current creation mission function carry out task creation,
The operations such as output area setting, then execute DC waveform output function, carry out the behaviour such as output channel number, the setting of channel amplitude
Make, finally execute direct current and end task function, carries out task stopping, the operation such as task is removed；When needing to export AC signal,
First stop aforementioned DC waveform signal output, then executes exchange creation mission function and carry out exchange task creation, output area
The operation such as setting, then AC wave shape output function is executed, the operations such as output channel number, channel amplitude, channel frequence setting are carried out,
It finally executes and exchanges the function that ends task, carry out the operations such as task stopping, task removing.For this purpose, needing to export different type
Waveform signal application in, usually using muti-piece multi-function data acquisition card, wherein each piece of multi-function data acquisition card only exports a type
The waveform signal of type in this way, use process is inconvenient, while increasing use cost.
And during certain type product testing, need synchronism output AC signal and direct current signal two types to simulate letter
Number, and although the multi-function data acquisition card in the detection device that the product uses at present has 4 road analog output functions and (differentiates
Rate: 16bit, turnover rate: 1.25MSa/s, output area: ± 10V), but 4 road analog outputs of same multi-function data acquisition card
Channel must export same type analog signals simultaneously, that is, be all direct current signal or be all AC signal, and cannot be defeated simultaneously
Different types of analog signals out are unable to satisfy corresponding detection demand, to constrain the function and performance to the type product
Detection.
Therefore, the spy of direct current signal and AC signal cannot be exported simultaneously for multi-function data acquisition card analog output channel
Point, urgent need construct a kind of multichannel different type waveform signal synchronism output method based on PXI bus multi-function data acquisition card, no
It can only realize detection and the Performance Evaluation to the type product, while it is same to meet one piece of multi-function data acquisition card in Auto-Test System
The application demand of step output different type waveform signal.
Summary of the invention
In order to overcome the shortcomings of that existing multi-channel waveform synchronism output method synchronism output performance is poor.The present invention provides one kind
Multi-channel waveform synchronism output method based on PXI bus multi-function data acquisition card.This method is thought using modularization, Hierarchical Design
The application layer of software, operation layer, service layer are individually encapsulated, exist respectively using the serviced component of COM technology building layering by road
Application layer, operation layer and the service layer building difference component of inspection software, encapsulate corresponding power function in assembly, exist in this way
In test process when multi-functional acquisition module simulation output different wave signal, corresponding assembly waveform output function need to be only modified
Setup parameter；When exporting direct current signal, the frequency parameter of corresponding assembly waveform output function need to be only set as to 0, solution
Multi-function data acquisition card multi-analog output channel of having determined is unable to the technical problem of synchronism output different type waveform signal, extension
The function of multi-function data acquisition card, improves multichannel different type waveform signal synchronism output performance.
The technical solution adopted by the present invention to solve the technical problems is: a kind of based on PXI bus multi-function data acquisition card
Multi-channel waveform synchronism output method, its main feature is that the following steps are included:
Step 1: in the driving function dynamic link library of service layer building creation mission function, waveform output function and
End task three functions of function, is integrally packed into dynamic link library and calls for operation layer and application layer.It is wherein defeated in waveform
Four one-dimension array variables of building, respectively channel number, channel amplitude, channel frequence and output data in function out, channel number,
Channel amplitude and channel frequence are formal parameter, and array length 4, output data variable array length is every channel output data
Points and the product of port number go out each channel different wave logarithmic output signal value using special interpolation algorithm interpolation calculation, and by its
It is written in the onboard Buffer of multi-function data acquisition card；
Step 2: calling the creation mission function in dynamic link library API in application layer, realize to multi-function data acquisition card
The operation such as initialization；Then waveform output function is called, different channels and each channel amplitude and frequency parameter is set as needed,
It is transmitted by function call and parameter, it is defeated according to the channel of setting, amplitude, Frequency Synchronization by triggering under system clock effect
Data in onboard Buffer out, that realizes multichannel different type waveform signal synchronizes continuous output；
Step 3: calling the function that ends task in dynamic link library API in application layer, stop different channels as requested
The output of waveform signal discharges resource.
The beneficial effects of the present invention are: this method uses modularization, Hierarchical Design thinking, the building point of COM technology is utilized
The serviced component of layer, the application layer of software, operation layer, service layer is individually encapsulated, respectively in the application layer of inspection software, business
Layer and service layer building difference component, encapsulate corresponding power function, so multi-functional acquisition during the test in assembly
When module simulation exports different wave signal, the setup parameter of corresponding assembly waveform output function need to be only modified；Output is straight
When flowing signal, only the frequency parameter of corresponding assembly waveform output function need to be set as 0, solve multi-function data acquisition card multichannel
Analog output channel is unable to the technical problem of synchronism output different type waveform signal, extends the function of multi-function data acquisition card
Can, improve multichannel different type waveform signal synchronism output performance.
It elaborates with reference to the accompanying drawings and detailed description to the present invention.
Detailed description of the invention
Fig. 1 is service layer's Dynamic Link Library Function figure of the method for the present invention building.
Fig. 2 is to carry out multi-function data acquisition card multi-channel waveform with service layer's Dynamic Link Library Function using the method for the present invention
The inspection software flow chart of synchronism output.
Specific embodiment
Referring to Fig.1-2.The present invention is based on the multi-channel waveform synchronism output methods of PXI bus multi-function data acquisition card specifically to walk
It is rapid as follows:
1, software architecture designs.
It is wanted for the versatility target of realization Auto-Test System and modularization, stratification, the compatibility of inspection software
Ask, for the programming quantity of software is reduced to minimum, using COM technology building layering serviced component, can by the application layer of software,
Operation layer, service layer are individually encapsulated, are adequately isolated, while convenient, flexible assembling and calling again.For this purpose, respectively in inspection software
Application layer, operation layer and service layer encapsulate corresponding power function in assembly, were testing in this way using different components are constructed
When using multi-function data acquisition card simulation output different wave signal in journey, the setting of corresponding assembly waveform output function need to be only modified
Parameter；When exporting direct current signal, the frequency parameter that need to only modify corresponding assembly waveform output function is set as 0.
2, service layer's driving function Design of DLL.
Building creates mission function, waveform output function, ends task in the driving function dynamic link library of service layer
Three functions of function are integrally packed into dynamic link library and call for operation layer and application layer.Specific step is as follows:
1. building creation mission function MWA_Init () carries out the creation of task handle, output area is set, output gain is set
It is fixed, the operation such as way of output setting；
2. constructing waveform output function MWA_Output (), output channel number, channel amplitude, channel frequence setting etc. are carried out
Operation constructs four one-dimension array variables, and respectively (channel number leads to for channel number, channel amplitude, channel frequence and output data
Road amplitude, channel frequence are formal parameter, and array length 4, output data variable array length is every channel output data point
Several products with port number), go out each channel different wave logarithmic output signal value using special interpolation algorithm interpolation calculation, first by it
It is written in the onboard Buffer of multi-function data acquisition card, then realizes that multi-channel synchronous is defeated by triggering under the action of system clock
Different types of waveform signal out；
The function MWA_Stop () 3. building ends task carries out the operations such as task stopping, task removing, removes waveform output
Aray variable in function, free system resources.
3, application layer software designs.
The creation mission function in driving function dynamic link library is called in application layer, is realized to the first of multi-function data acquisition card
The operation such as beginningization；Then waveform output function is called, different channels are set as needed and each channel amplitude, frequency parameter are (real
Border parameter), it is transmitted by function call and parameter, by triggering according to the channel of setting, amplitude, frequency under system clock effect
Data in the onboard Buffer of rate synchronism output, that realizes multichannel different type waveform signal synchronizes continuous output；Finally, adjusting
With the function that ends task, stop the output of different channel waveform signals as requested, discharges resource.
Claims (1)
1. a kind of multi-channel waveform synchronism output method based on PXI bus multi-function data acquisition card, it is characterised in that including following
Step:
Step 1: building creation mission function, waveform output function and end in the driving function dynamic link library of service layer
Three functions of mission function are integrally packed into dynamic link library and call for operation layer and application layer；Wherein letter is exported in waveform
Four one-dimension array variables, respectively channel number, channel amplitude, channel frequence and output data, channel number, channel are constructed in number
Amplitude and channel frequence are formal parameter, and array length 4, output data variable array length is every channel output data points
With the product of port number, go out each channel different wave logarithmic output signal value using special interpolation algorithm interpolation calculation, and is written into
In the onboard Buffer of multi-function data acquisition card；
Step 2: calling the creation mission function in dynamic link library API in application layer, realize to the initial of multi-function data acquisition card
Change operation；Then waveform output function is called, different channels and each channel amplitude and frequency parameter is set as needed, passes through letter
Number is called to be transmitted with parameter, onboard according to the channel of setting, amplitude, Frequency Synchronization output by triggering under system clock effect
Data in Buffer, that realizes multichannel different type waveform signal synchronizes continuous output；
Step 3: calling the function that ends task in dynamic link library API in application layer, stop different channel waveforms as requested
The output of signal discharges resource.
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| CN105487862B true CN105487862B (en) | 2019-02-01 |
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| CN112306146B (en) * | 2020-10-30 | 2023-07-21 | 山东浪潮科学研究院有限公司 | Device and method for synchronizing output waveforms of AWG board cards in multi-PXIE chassis |
| CN114968871B (en) * | 2022-05-06 | 2023-03-10 | 松山湖材料实验室 | Signal synchronous acquisition method and device and electronic equipment |
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| CN1509001A (en) * | 2002-12-16 | 2004-06-30 | �й����ӿƼ����Ź�˾����ʮ�о��� | Multi channel digital signal generator |
| US7062423B1 (en) * | 2001-08-22 | 2006-06-13 | Marvell International Ltd. | Method and apparatus for testing a system on a chip (SOC) integrated circuit comprising a hard disk controller and read channel |
| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
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| US7062423B1 (en) * | 2001-08-22 | 2006-06-13 | Marvell International Ltd. | Method and apparatus for testing a system on a chip (SOC) integrated circuit comprising a hard disk controller and read channel |
| CN1509001A (en) * | 2002-12-16 | 2004-06-30 | �й����ӿƼ����Ź�˾����ʮ�о��� | Multi channel digital signal generator |
| CN1831541A (en) * | 2006-04-14 | 2006-09-13 | 北京航空航天大学 | Multichannel synchronous sinusoidal signal generator |
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