CN101719169A - Three-in-one USB data acquisition card - Google Patents
Three-in-one USB data acquisition card Download PDFInfo
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- CN101719169A CN101719169A CN200910226335A CN200910226335A CN101719169A CN 101719169 A CN101719169 A CN 101719169A CN 200910226335 A CN200910226335 A CN 200910226335A CN 200910226335 A CN200910226335 A CN 200910226335A CN 101719169 A CN101719169 A CN 101719169A
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Abstract
The invention relates to a three-in-one USB data acquisition card belonging to the field of data processing and comprising an analogue-digital conversion circuit. The three-in-one USB data acquisition card is characterized by being provided with a microcontroller control circuit with a first USB interface, an operating mode transfer switch, a USB primary/ peripheral controller control circuit and a second USB interface, wherein the microcontroller control circuit is connected with the analogue-digital conversion circuit and the USB primary/periphery controller control circuit through a general CPU bus; the USB primary/periphery controller control circuit is correspondingly connected with the second USB interface; and the microcontroller control circuit decides the working mode of a data acquisition card according to the amplitude of a level signal input by a moving contact of the operating mode transfer switch. Beside the conventional functions of acquisition, conversion and output of data, the invention can directly store large capacity of data content to an externally-connected movable storage, thereby greatly enlarging and developing the application range of the data acquisition card; thus, the invention can be widely applied to the fields of industrial process control and industrial process monitoring.
Description
Technical field
The invention belongs to electric digital data processing field, relate in particular to a kind of data collector.
Background technology
Data acquisition is meant from simulation such as sensor and other Devices to test and/or digital unit under test and adopts non electrical quantity or electric quantity signal automatically, delivers in the host computer and analyzes, handles.
Data acquisition system (DAS) be in conjunction with based on the measurement software and hardware product of computing machine or other special test platforms realize flexibly, user-defined measuring system.
Usually, must be before data acquisition equipment be gathered the modulation sensor signal, comprise it gained or decay and isolation, amplification, filtering etc., treat the sensor of some kind, also need to provide pumping signal.
Data collecting card, promptly realize the computing machine expansion card of data acquisition function, it can pass through bus modes such as USB, PXI, PCI, PCI Express, live wire (1394), PCMCIA, ISA, Compact Flash, 485,232, Ethernet or various wireless networks and insert host computer.
In industry spot, a lot of various types of sensors can be installed usually, for example: pressure, temperature, flow, sound or various electrical quantitys or the like; Be subjected to the restriction of site environment, the signal of sensor, as: the voltage or the current signal of pressure transducer output, can not teletransmission or because sensor wiring is too many or complicated, we will select distributed or long-range capture card (or module) for use, at the scene the signal degree of precision convert digital quantity to, and then by various distant communication technology (as 485,232, Ethernet, various wireless network) data are passed in computing machine or other controllers and to handle; This also does a kind of of data capture card at last, and just it is stronger to the adaptive faculty of environment, can tackle various abominable industrial environments.
In actual applications, the data collecting card overwhelming majority concentrates on and gathers in analog quantity, digital quantity, thermal resistance or the isoparametric collection of thermopair, the processing procedure, and wherein thermal resistance can be thought non electrical quantity (still will gather with current drives in essence in fact); Wherein, analog acquisition card and digital data acquisition card are used to such an extent that be the most widely.
The day for announcing is on April 4th, 2007, and notification number is the Chinese utility model patent of CN2886657Y, discloses a kind of " based on the data collecting card of USB2.0 ", and it comprises data transmission module, analog-to-digital conversion module and power transfer module three parts.Data transmission module has adopted the USB2.0 transceiver integrated, serial interface engine, low-power consumption, enhancement mode 8051 controllers and a programmable peripheral interface (GPIF), and the USB2.0 controller chip with program/data RAM.Analog-to-digital conversion module links to each other with the GPIF interface of data transmission module middle controller chip.Power conversion chip adopts special-purpose power conversion chip, makes interface simple, thereby does not need external power supply, is fit to the work on the spot needs, has also guaranteed the reliability of system simultaneously.
In technique scheme, its USB transceiver only is used for carrying out data transmission between itself and the PC and data collecting card is obtained working power from PC, and fails to give full play to the effect of USB module.
So existing data collecting card all needs to be used with computing machine, can not carry out work independently, and the large-capacity data content directly can not be stored to external packaged type storer.
Say from another point of view, existing data collecting card all only has data acquisition/mapping function, and do not have control other devices function, make its range of application have significant limitation, can not satisfy the needs in the automation control system/field of develop rapidly, also can't satisfy the request for utilization of some specific control/application scenario.
Summary of the invention
Technical matters to be solved by this invention provides a kind of three-in-one USB data acquisition card, it is except the function with conventional data acquisition/conversion/output, also has selectable independence/semi-independent mode of operation, the large-capacity data content directly can be stored to external packaged type storer, also can under specified requirements, send the corresponding synchronous signal and remove to control other devices, make the range of application of data collecting card be expanded greatly and bring into play, can greatly enrich and improve the control device and the automaticity of existing apparatus/system.
Technical scheme of the present invention is: a kind of three-in-one USB data acquisition card is provided, comprise a/D converter circuit, it is characterized in that: a microprocessor controls circuit, a mode of operation change-over switch, a USB master/peripheral controllers control circuit and second USB interface are set; Described microprocessor controls circuit attaches first USB interface; Described microprocessor controls circuit is connected with described a/D converter circuit and described USB master/peripheral controllers control circuit through the universal cpu bus; The corresponding connection of described USB master/peripheral controllers control circuit with second USB interface; Described microprocessor controls circuit is according to the height by mode of operation change-over switch moving contact incoming level signal, the mode of operation of determination data capture card; The mode of operation of described data collecting card comprises unique host mode of operation, slave mode of operation and video capability pattern; The I/O port of described data collecting card connects composition data collection and control channel with the corresponding I/O port of microprocessor controls circuit and a/D converter circuit successively.
Described first USB interface is connected with the USB port of PC, a USB Power Adapter or a battery that has USB interface.
Described second USB interface is used for the external one packaged type storer with USB interface form.
Concrete, the packaged type storer with USB interface form is USB flash disk or flash card.
Described universal cpu bus is the spi bus structure.
When described three-in-one USB data acquisition card was in the unique host mode of operation, described first USB interface and USB Power Adapter or the battery that has a USB interface were connected, for the whole data collection card provides power supply; Described second USB interface is connected with described packaged type storer, under the control of described microprocessor controls circuit, I/O port processing that will be by data collecting card to data deposit in the packaged type storer, constitute an independently USB flash disk storage datalogger; Described microprocessor controls circuit can pass through its I/O port, exports a synchronous triggering signal, controls other instrument and makes synchro measure.
Further, when above-mentioned three-in-one USB data acquisition card was used for the video capability pattern, under the control of described microprocessor controls circuit, data collecting card carried out the collection of simulating signal amount by the total line traffic control a/D converter circuit of universal cpu; Beginning by when gathering analog quantity at every turn, described microprocessor controls circuit utilizes its DIO function port, send a synchronization pulse, be used for synchronously and trigger the external video equipment that has the external trigger port, with the synchronization control function that reaches data acquisition and take pictures.
When described three-in-one USB data acquisition card was in the slave mode of operation, its described first USB interface was connected with the USB port of PC, as the passage that obtains power supply and exchanges data; Under the control of described microprocessor controls circuit, I/O port processing that will be by data collecting card to the memory storage of data transmission in the PC in, constitute a multifunctional data acquisition card; Described microprocessor controls circuit can pass through its I/O port, receives the synchronous triggering signal of an outside, is subjected to the control of other instruments, makes the synchronous acquisition of data.
Further, when above-mentioned three-in-one USB data acquisition card is used for the video capability pattern, by the control program in the PC, detect the image information that external video equipment sends, when collecting every two field picture, the control program in the PC reads the current simulating signal amount that collects by the USB port of PC and first USB interface of data collecting card from data collecting card, to adapt to the video equipment that does not have the external trigger port, to reach the synchronization control function of taking pictures with data acquisition.
More specifically, described microprocessor controls circuit comprises a microprocessor chip CPU and peripheral circuit thereof at least; Described USB master/peripheral controllers control circuit comprises a USB control chip and peripheral circuit thereof at least; Described a/D converter circuit comprises an A/D change-over circuit chip at least; Connect by the spi bus structure between described microprocessor chip CPU, USB control chip and the A/D change-over circuit chip.
Further, the SDO function port of described microprocessor chip CPU is distinguished corresponding connection with the SDI function port of USB control chip and the DIN function port of A/D change-over circuit chip; The SDI function port of described microprocessor chip CPU is distinguished corresponding connection with the SDO function port of USB control chip and the DOUT function port of A/D change-over circuit chip; The SCK function port of described microprocessor chip CPU is distinguished corresponding connection with the SCLK function port of USB control chip and the CLK function port of A/D change-over circuit chip; The RB2 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of USB control chip; The RB3 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of A/D change-over circuit chip;
Described microprocessor chip CPU is by CS function port, utilize RB2 and RB3 port, alternately switch the spi bus exchanges data between microprocessor chip CPU and USB control chip and the A/D change-over circuit chip, realize the operation function and the purpose of replace/carrying out data acquisition respectively and data storage being gone into the packaged type storer.
Compared with the prior art, advantage of the present invention is:
1. by second USB interface and correspondent control circuits thereof are set, make the notebook data capture card except function with conventional data acquisition/conversion/output, also had selectable independence/non-independent working mode (also being called unique host/slave mode of operation), the large-capacity data content directly can be stored to external packaged type storer, also can under specified requirements, send the corresponding synchronous signal and remove to control other devices, make the range of application of data collecting card be expanded greatly and bring into play, can greatly enrich and improve the control device and the automaticity of existing apparatus/system;
2. owing to adopted highly integrated circuit chip, make the circuit topological structure of whole capture card simplify greatly, the corresponding minimizing of peripheral circuit element, the function of whole capture card improves greatly, and job stability increases, and more can adapt to various bad working environment;
3. because the introducing of microprocessor chip, the notion and the method for internal processes design, external application programming interfaces are incorporated in the capture card, attainable control function of data collecting card and data-handling capacity have greatly been enriched, for condition has been created in the raising of data processing and robotization control ability.
Description of drawings
Fig. 1 is that electric work of the present invention can module constitute schematic block diagram;
Fig. 2 is a connection line synoptic diagram between each chip of the present invention.
1 is a/D converter circuit among the figure, and 2 is the microprocessor controls circuit, and 3 is the mode of operation change-over switch, 4 is USB master/peripheral controllers control circuit, and 5 is second USB interface, and 6 is first USB interface, 7 and 8 is the universal cpu bus, and 9 and 9 ' is the I/O port of data collecting card, and 10 is external USB flash disk.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Among Fig. 1, this three-in-one USB data acquisition card, comprise a/D converter circuit 1, its inventive point is to be provided with a microprocessor controls circuit 2, mode of operation change-over switch 3, a USB master/peripheral controllers control circuit 4 and one second USB interface 5; Wherein, the microprocessor controls circuit attaches first USB interface 6; The microprocessor controls circuit is connected with a/D converter circuit and USB master/peripheral controllers control circuit through universal cpu bus 7,8; The corresponding connection of USB master/peripheral controllers control circuit with second USB interface; The microprocessor controls circuit is according to the height by mode of operation change-over switch moving contact incoming level signal, the mode of operation of determination data capture card; The mode of operation of data collecting card comprises unique host mode of operation, slave mode of operation and video capability pattern; The I/O port 9 and 9 ' of data collecting card connects composition data collection and control channel with the corresponding I/O port of microprocessor controls circuit and a/D converter circuit successively.
First USB interface of data collecting card is connected with the USB port of PC, a USB Power Adapter or a battery that has USB interface.
Second USB interface of data collecting card is used for the external one packaged type storer 10 with USB interface form.
Concrete, the packaged type storer with USB interface form can be USB flash disk or flash card.
Its universal cpu bus is the spi bus structure.
The I/O port of data collecting card is (for the ease of expression and narration, among this figure it is divided into left and right sides two parts, be not limited to this during practical application, it can be merged into an integral body or be divided into more parts), connect composition data collection and control channel with the corresponding I/O port of microprocessor controls circuit and a/D converter circuit successively.
As seen from Figure 1, between the data collecting card I/O port and a/D converter circuit in left side, be provided with 8 circuit-switched data incoming lines, and be provided with 4 road bi-directional digital I/O lines and a synchronous triggering signal incoming line between the microprocessor controls circuit among the figure; Adopt the spi bus mode to carry out both-way communication and signal transmission between microprocessor controls circuit and the a/D converter circuit.
Between the data collecting card I/O port 9 ' and microprocessor controls circuit on right side, be provided with 12 road bi-directional digital I/O lines, a 16-Bit counter, two 10-bit PWM width modulation delivery outlets and a synchronous triggering signal outlet line among the figure.
Between microprocessor controls circuit and USB master/peripheral controllers control circuit, adopt the spi bus mode to carry out both-way communication and signal transmission.
USB master/peripheral controllers control circuit is through meeting USB 1.0 or USB2.0 specification data line structure circuit, with second USB interface and be connected with external packaged type storer via second USB interface.
Owing to introduced microcontroller circuit and the USB master/peripheral controllers control circuit and second USB interface, make the notebook data capture card except function with conventional data acquisition/conversion/output, also had selectable independence/non-independence (being called slave again) mode of operation, the large-capacity data content directly can be stored to external packaged type storer, also can under specified requirements, send the corresponding synchronous signal and remove to control other devices, make the range of application of data collecting card be expanded greatly and bring into play.
When this three-in-one USB data acquisition card was in " unique host " mode of operation, first USB interface and USB Power Adapter or the battery that has a USB interface were connected, for the whole data collection card provides power supply; Second USB interface is connected with external packaged type storer, under the control of microprocessor controls circuit, I/O port processing that will be by data collecting card to data deposit in the packaged type storer, constitute an independently USB flash disk storage datalogger.
In addition, according to different control requirements, under the flow process control of software program, the microprocessor controls circuit also can pass through its I/O port, export a synchronous triggering signal (being usually said " trigger out " signal), control other instrument and make synchro measure.
Concrete, when data collecting card was used for the video capability pattern, under the control of microprocessor controls circuit, data collecting card carried out the collection of simulating signal amount by the total line traffic control a/D converter circuit of universal cpu; Beginning by when gathering analog quantity at every turn, the microprocessor controls circuit utilizes its DIO function port, send a synchronization pulse, be used for synchronously and trigger the external video equipment that has the external trigger port, with the synchronization control function that reaches data acquisition and take pictures.
When this three-in-one USB data acquisition card was in " slave " duty, its first USB interface was connected with the USB port of PC, as the passage that obtains power supply and exchanges data; Under the control of microprocessor controls circuit, I/O port processing that will be by data collecting card to the memory storage of data transmission in the PC in, constitute a multifunctional data acquisition card; The microprocessor controls circuit can pass through its I/O port, receives the synchronous triggering signal of an outside, is subjected to the control of other instruments, makes the synchronous acquisition of data.
At this moment, conventional video equipment (such as USB network cameras or Firewire camera) directly is connected with the USB interface of PC, under the function control of PC inner control program, realize synchro control, demonstration synchronously, synchronous recording or the synchronized playback of data acquisition and video avi file, the synchronous triggering signal " trigger out " of this moment is used for controlling other equipment and makes synchro measure together.
Concrete, by the control program in the PC, detect the image information that external video equipment sends, when collecting every two field picture, control program in the PC is by the USB port of PC and first USB interface of data collecting card, from data collecting card, read the current simulating signal amount that collects, to adapt to the video equipment that does not have the external trigger port, to reach the synchronization control function of taking pictures with data acquisition.
Take pictures and the concrete mode of the synchronization control function of data acquisition about utilizing the control program in the PC, reaching, but the REFERENCE TO RELATED people apply for before this, application number is the related content of the patented claim of CN 200910046967.2, no longer narrate at this.
Among Fig. 2, its microprocessor controls circuit comprises a microprocessor chip CPU and peripheral circuit thereof at least; Its USB master/peripheral controllers control circuit comprises a USB control chip and peripheral circuit thereof at least; Its a/D converter circuit comprises an A/D change-over circuit chip at least; Connect by the spi bus system between microprocessor chip CPU, USB control chip and the A/D change-over circuit chip.
Further, the SDO function port of microprocessor chip CPU is distinguished corresponding connection with the SDI function port of USB control chip and the DIN function port of A/D change-over circuit chip; The SDI function port of described microprocessor chip CPU is distinguished corresponding connection with the SDO function port of USB control chip and the DOUT function port of A/D change-over circuit chip; The SCK function port of described microprocessor chip CPU is distinguished corresponding connection with the SCLK function port of USB control chip and the CLK function port of A/D change-over circuit chip; The RB2 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of USB control chip; The RB3 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of A/D change-over circuit chip.
Microprocessor chip CPU is by CS function port, utilize RB2 and RB3 port, alternately switch the spi bus exchanges data between microprocessor chip CPU and USB control chip and the A/D change-over circuit chip, realize the operation function and the purpose of replace/carrying out data acquisition respectively and data storage being gone into the packaged type storer.
The spi bus system is a kind of synchronous serial Peripheral Interface, and it can make MCU (or CPU) chip and various peripherals communicate with exchange message with serial mode.
The spi bus system can be directly and the multiple standards peripheral components direct interface of each manufacturer production, and this interface is general to use 4 lines: serial time clock line (SCK), main frame input/slave output data line MISO, main frame output/slave input data line MOSI and the effective slave selection wire of low level SS (the SPI interface chip that the SPI interface chip that has has look-at-me line INT or INT, have does not have main frame output/slave input data line MOSI).
Only by main equipment control, slave unit can not control signal wire for the SCK signal wire.Equally, in a equipment, has a main control equipment at least based on SPI.
Such transmission mode has an advantage, different with common serial communication, common serial communication one-time continuous transmits at least 8 bit data, and SPI allows the transmission of one one of data, even allow to suspend, because the SCK clock line is controlled by main control equipment, when not having the clock saltus step, data are not gathered or transmitted to slave unit.That is to say that main equipment is by finishing the control to communication to the control of SCK clock line.
Because spi bus is a mature technology, so its concrete principle of work and transmission/control procedure are not described in detail in this.
Above-mentioned microprocessor controls circuit can select for use 18F4550 or MSP430F449 or with it function close/identical integrated circuit (IC) chip; USB master/peripheral controllers control circuit can select for use Vinculum or uPD720150 or with it function close/identical integrated circuit (IC) chip; A/D converter circuit can select for use MCP3208 or ADS1232 or with it function close/identical integrated circuit (IC) chip, other no specific (special) requirements.
Because above-mentioned functions circuit, integrated circuit (IC) chip are mature technology, concrete/standard application circuit of its each chip all has in the website of its production firm or data presented with machine, so its concrete connection line, principle of work and signal controlling flow process are not described in detail in this; Those of ordinary skill in the art after understanding and having grasped invention thinking of the present invention and innovation main points, can reproduce the application's technical scheme without performing creative labour fully, realizes its goal of the invention and obtains identical technique effect.
But the notebook data capture card will be integrated in one by the USB flash disk storage datalogger and the camera synchronized video recording function of the usb data capture card independent operating of PC control, has realized the multi-functional of " three-in-one ".
Owing to adopted technique scheme, the notebook data capture card is except the function with conventional data acquisition/conversion/output, also has selectable independence/non-independent working mode, the large-capacity data content directly can be stored to external packaged type storer, also can under specified requirements, send the corresponding synchronous signal and remove to control other devices, the function of whole capture card improves greatly, job stability increases, make the range of application of data collecting card be expanded greatly and bring into play, greatly enriched attainable control function of data collecting card and data-handling capacity.
It should be noted that above-mentioned patent documentation/file of mentioning only should regard the understanding that helps the present techniques scheme as, and should not regard certain restriction as some part of the application.
Those of ordinary skill in the art; after understanding and having grasped basic invention thinking of the present invention; fully can be without performing creative labour; on the basis of technical scheme disclosed in this invention; make various that be equal to or similar technical schemes, that these are equal to or similar technical scheme also should be regarded the scope that the present invention is claimed as.
Will be appreciated that,,, all will drop in the application's the desired protection domain of claim variation or the distortion of above each embodiment as long as in connotation scope of the present invention.
The present invention can be widely used in industrial process control and industrial process monitoring field.
Claims (10)
1. a three-in-one USB data acquisition card comprises a/D converter circuit, it is characterized in that:
One microprocessor controls circuit, a mode of operation change-over switch, a USB master/peripheral controllers control circuit and second USB interface are set;
Described microprocessor controls circuit attaches first USB interface;
Described microprocessor controls circuit is connected with described a/D converter circuit and described USB master/peripheral controllers control circuit through the universal cpu bus;
The corresponding connection of described USB master/peripheral controllers control circuit with second USB interface;
Described microprocessor controls circuit is according to the height by mode of operation change-over switch moving contact incoming level signal, the mode of operation of determination data capture card;
The mode of operation of described data collecting card comprises unique host mode of operation, slave mode of operation and video capability pattern;
The I/O port of described data collecting card connects composition data collection and control channel with the corresponding I/O port of microprocessor controls circuit and a/D converter circuit successively.
2. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that described first USB interface is connected with the USB port of PC, a USB Power Adapter or a battery that has USB interface.
3. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that described second USB interface is used for the external one packaged type storer with USB interface form.
4. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that described universal cpu bus is the spi bus structure.
5. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that when described three-in-one USB data acquisition card is in the unique host mode of operation, described first USB interface and USB Power Adapter or the battery that has a USB interface are connected, for the whole data collection card provides power supply; Described second USB interface is connected with described packaged type storer, under the control of described microprocessor controls circuit, I/O port processing that will be by data collecting card to data deposit in the packaged type storer, constitute an independently USB flash disk storage datalogger; Described microprocessor controls circuit can pass through its I/O port, exports a synchronous triggering signal, controls other instrument and makes synchro measure.
6. according to the described three-in-one USB data acquisition card of claim 5, it is characterized in that when described three-in-one USB data acquisition card is used for the video capability pattern, under the control of described microprocessor controls circuit, data collecting card carries out the collection of simulating signal amount by the total line traffic control a/D converter circuit of universal cpu;
Beginning by when gathering analog quantity at every turn, described microprocessor controls circuit utilizes its DIO function port, send a synchronization pulse, be used for synchronously and trigger the external video equipment that has the external trigger port, with the synchronization control function that reaches data acquisition and take pictures.
7. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that when described three-in-one USB data acquisition card is in the slave mode of operation, its described first USB interface is connected with the USB port of PC, as the passage that obtains power supply and exchanges data; Under the control of described microprocessor controls circuit, I/O port processing that will be by data collecting card to the memory storage of data transmission in the PC in, constitute a multifunctional data acquisition card; Described microprocessor controls circuit can pass through its I/O port, receives the synchronous triggering signal of an outside, is subjected to the control of other instruments, makes the synchronous acquisition of data.
8. according to the described three-in-one USB data acquisition card of claim 7, it is characterized in that when described three-in-one USB data acquisition card is used for the video capability pattern, by the control program in the PC, detect the image information that external video equipment sends, when collecting every two field picture, control program in the PC is by the USB port of PC and first USB interface of data collecting card, from data collecting card, read the current simulating signal amount that collects, to adapt to the video equipment that does not have the external trigger port, to reach the synchronization control function of taking pictures with data acquisition.
9. according to the described three-in-one USB data acquisition card of claim 1, it is characterized in that described microprocessor controls circuit comprises a microprocessor chip CPU and peripheral circuit thereof at least; Described USB master/peripheral controllers control circuit comprises a USB control chip and peripheral circuit thereof at least; Described a/D converter circuit comprises an A/D change-over circuit chip at least; Connect by the spi bus structure between described microprocessor chip CPU, USB control chip and the A/D change-over circuit chip.
10. according to the described three-in-one USB data acquisition card of claim 9, it is characterized in that the SDO function port of described microprocessor chip CPU, distinguish corresponding connection with the SDI function port of USB control chip and the DIN function port of A/D change-over circuit chip; The SDI function port of described microprocessor chip CPU is distinguished corresponding connection with the SDO function port of USB control chip and the DOUT function port of A/D change-over circuit chip; The SCK function port of described microprocessor chip CPU is distinguished corresponding connection with the SCLK function port of USB control chip and the CLK function port of A/D change-over circuit chip; The RB2 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of USB control chip; The RB3 function port of described microprocessor chip CPU is with the corresponding connection of CS function port of A/D change-over circuit chip;
Described microprocessor chip CPU is by CS function port, utilize RB2 and RB3 port, alternately switch the spi bus exchanges data between microprocessor chip CPU and USB control chip and the A/D change-over circuit chip, realize the operation function and the purpose of replace/carrying out data acquisition respectively and data storage being gone into the packaged type storer.
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| CN103176718A (en) * | 2011-12-20 | 2013-06-26 | 深圳市蓝韵网络有限公司 | Implementation method of long-distance switch capture card mode |
| WO2014019370A1 (en) * | 2012-07-30 | 2014-02-06 | 深圳市江波龙电子有限公司 | Multifunctional storage module and u disk assembly |
| WO2016065821A1 (en) * | 2014-10-27 | 2016-05-06 | 北京元隆雅图文化传播股份有限公司 | Multifunctional portable data card and data transmission method |
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| CN103176718B (en) * | 2011-12-20 | 2016-11-30 | 蓝网科技股份有限公司 | The implementation method of long-distance switch capture card mode |
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| CN109525788A (en) * | 2018-11-28 | 2019-03-26 | 广州市网拓信息技术有限公司 | A kind of artificial intelligence robot sound and light signal acquisition conversion equipment and its working principle |
| CN110266915A (en) * | 2019-06-25 | 2019-09-20 | 北京字节跳动网络技术有限公司 | The method and apparatus of video acquisition content are controlled in a kind of Android device |
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| CN103176718B (en) * | 2011-12-20 | 2016-11-30 | 蓝网科技股份有限公司 | The implementation method of long-distance switch capture card mode |
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Application publication date: 20100602 |