CN101685107B - Testing device with setting state converting function and control method thereof - Google Patents

Abstract

A testing device with setting state conversion function and its control method, comprising a working part, a control part connected with the working part, a state memory connected with the control part, a The state conversion button connected to the control part, the state conversion button can generate a state storage instruction or a state call instruction, or make the control part save the current setting state of the test equipment in the state memory, or make the The control component sets the execution state of the test device according to the content stored in the state memory. The device of the present invention has the feature of saving or restoring the device setting state with one key, and the user can quickly and conveniently switch the setting state of the device according to needs. The test equipment described in the present invention can be various test equipment, such as digital signal generator, digital oscilloscope or comprehensive test equipment.

Description

A testing device with setting state transition function and its control method

technical field

The invention relates to the field of testing, in particular to the field of electric variable testing, and more particularly to the field of digital oscilloscopes.

Background technique

With the continuous development of digital technology, the functions and indicators of various digital test equipment are also increasing and improving. For example, the bandwidth of some brands of digital oscilloscopes has reached more than 10G, the sampling rate has exceeded 50G, and the storage depth has exceeded 1G. The development of these technologies has played a vital role in promoting the progress of other technologies. With the improvement of performance in all aspects, the functions of modern digital oscilloscopes are becoming more and more powerful. They can not only complete functions such as signal measurement, data storage, and waveform recording, but also increase network communication capabilities, and add Ethernet interfaces and USB interfaces. For other test equipment, such as digital signal analyzers, digital multimeters, digital multimeters, digital signal generators, function generators, pulse signal generators, etc., the functions and indicators have also been greatly improved, and the functions are getting stronger and stronger. , the index is getting higher and higher.

The enhancement and increase of function types brings about the problem of instrument function fatigue. Because the operation surface of the instrument is limited, in the face of a variety of function options, some relatively important functions can only be placed on the panel positions that are more convenient to use, while some commonly used but relatively unimportant functions can only be placed on the panel. In the menu that requires multi-level operation, the setting of these functions can only be completed after setting through the multi-level menu. For example, to turn on and off the digital filter function of a certain channel, you must first open the corresponding channel menu, then enter the digital filter submenu, and click the on or off button to realize it. To turn on and off the "sticky" function of the channel, just More than four steps are required. The numerous operation steps are extremely inconvenient for the user of the instrument, especially in the occasion where it is necessary to constantly switch the setting state of the equipment. For example, it is necessary to frequently compare and observe the output waveform changes of the oscilloscope at different sampling frequencies, or to understand the response of the device under test when the signal generator outputs a variety of different signals.

In order to meet the needs of users who need to constantly change the settings of the test equipment, some manufacturers add some shortcut buttons to the equipment. Each button points to a common setting state of the equipment or is called a common function. When the user needs it, press the shortcut button , you can change the setting status of the equipment, for example, add quick print, quick storage, data quick switching display buttons on the oscilloscope, multimeter, signal analyzer, add quick measurement and direct waveform recording buttons on the oscilloscope, and add buttons on the signal generator Or include a quick output button on the function generator to add some reference signals, etc. Because the shortcut key mode can realize the corresponding function to be turned on or off by pressing a key, it is convenient for users to use, but because the function switching of these shortcut keys can only point to a specific function or called the instrument setting state, the limited panel Space cannot provide users with many shortcut key methods, but for different users and different application occasions, the user's requirements are completely different. For a specific user, often some shortcut keys may be useless at all, but the shortcut key functions that are really needed are not available. Therefore, the application occasions of this shortcut key mode are very limited.

In order to meet the needs of users to constantly change the settings of the test equipment, many manufacturers have added a function of saving and recalling the equipment setting state for their own equipment. Taking the DS100B series oscilloscope of RIGOL as an example, a function of recording the current setting of the equipment is added. The user can record all the setting states of the oscilloscope through the configuration of the menu, such as the digital filter function and parameters of the oscilloscope. When the user needs it, the user can choose to store or recall the stored setting state data through the menu, and use The oscilloscope resets to the desired setup state. In addition, many function generators, signal generators, data acquisition systems, and test systems also provide similar state recording and calling functions.

Although the equipment in the prior art has the function of saving and recalling the equipment setting state, when using this function, it still needs to be completed through multiple steps under the guidance of multi-level menu options, and the operation is still very troublesome.

The purpose of the present invention is to provide a testing device with a setting state conversion function different from the prior art.

Another object of the present invention is to provide a control method for a test device with a setting state transition function of the present invention.

Contents of the invention

A test device with setting state conversion function of the present invention has a working part, a control part connected with the working part, a keyboard unit connected with the control part, and a keyboard unit connected with the control part. The state memory connected to the parts, the keyboard unit has a state transition button connected to the control part, the state transition key can generate a state storage instruction or a state call instruction, and the control part has a The state storage instruction is sensitive, and the setting state of the current test equipment is saved in the state memory; the control unit is sensitive to the state call instruction, and the execution of the test equipment is executed according to the content stored in the state memory. Status settings.

Test equipment of the present invention can be signal acquisition device, as digital oscilloscope, fluorescent oscilloscope, digital multimeter, digital multimeter, signal analyzer and signal acquisition equipment. The test equipment of the present invention can also be a signal generating device, such as a precision digital power supply, a reference signal source, a digital signal generator, a function generator, various waveform generators (such as a sinusoidal signal generator), a pulse signal generator, etc. , the test equipment of the present invention can also be a comprehensive test equipment, such as a signal generator with a waveform display function, a test system composed of an oscilloscope and a signal generator power supply system, etc., and the test equipment of the present invention can also be Those test equipment controlled by computer, such as virtual oscilloscope (composed of measurement circuit and computer system, complete data acquisition and measurement under the control of computer, display test results through computer screen, or also include waveform and waveform data, etc.). The test equipment described in the present invention can also be the test equipment or test system formed by those plug-in instruments, such as the test equipment formed by VXI and PCI bus structures.

The control unit of the present invention can be composed of a single-chip microprocessor or FPGA gate array circuit, and can also be composed of a personal desktop computer, a mobile computer, a single-board computer or a plug-in computer.

In a kind of test equipment with setting state transition function of the present invention, the state transition button can generate state storage instruction, and can also generate state call instruction, that is, two interrupt instructions are provided with one button, so as to facilitate the user usage of.

In the test device with the function of setting state transition according to the present invention, the control unit can distinguish whether the signal is a state storage instruction or a state call instruction according to the time length of the state transition button outputting the signal. The test equipment may have a time threshold, and the control unit may perform a state storage step for an interrupt command output by the state transition key that exceeds the time threshold; the control unit may output a state transition key that is shorter than the time The interrupt instruction of the threshold value executes the state call step.

In order to realize the above functions, after receiving the interrupt command sent by the keyboard unit, the control unit can perform the following control steps:

First, execute the step of judging the type of button;

Then, when the button type is the described state transition button, it is judged whether the interrupt instruction sent by the button is a state storage instruction or a state call instruction;

Finally, when the interrupt command sent by the key is a state storage command, the corresponding state storage step is executed; when the interrupt command sent by the button is a state call command, the corresponding state call step is executed.

For the above-mentioned control steps, it is also possible to add an interrupt timing step to count the time length of the button interrupt command before performing the button type judgment step;

After executing the key type judgment step, when the key type is the state transition key, judge whether the time length of the key interruption command exceeds the time threshold, and judge the state transition key according to whether the time length of the key interruption command exceeds the time threshold Whether the interrupt instruction issued is a state storage instruction or a state call instruction;

For the above control steps, an interrupt command exceeding the time threshold may be judged as a state storage command, and the state storage step may be executed; an interrupt command shorter than the time threshold may be judged as a state call command, and the state call step may be executed.

The state transition button in the present invention can be a physical button installed on the panel, or a virtual button displayed on the display screen of the testing device.

The test equipment with the setting state conversion function of the present invention has the characteristics of quick state conversion and convenient use, and the user can save the current setting state of the test equipment by one-key saving, and can also restore it by one-key In this way, the saved and user-configured setting state is retrieved.

Description of drawings:

Accompanying drawing 1 shows the structure diagram of the oscilloscope 1 exemplified by the preferred embodiment of the present invention.

Figure 2 is a schematic diagram of the keyboard interrupt information processing program 100 of the oscilloscope 1 exemplified by the preferred embodiment of the present invention.

Figure 3 is a schematic diagram of the state storage program 105 of the oscilloscope 1 selected by the preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of the state calling program 106 executed by the oscilloscope 1 selected by the preferred embodiment of the present invention.

Detailed ways:

In order to further illustrate a test device with a setting state conversion function of the present invention, the best embodiments selected by the present invention are listed below.

In the preferred embodiment selected by the present invention, a test device with setting state transition function described in the present invention is composed of a digital oscilloscope 1, referring to accompanying drawing 1 .

In the selected preferred embodiment of the present invention, control part of the present invention is control unit 2, and control unit 2 is made of a CPU, working part of the present invention is to be connected with control unit 2 Unit 3, keyboard unit 4, display unit 5, communication unit 6, general information storage unit 8 and state information storage unit 7.

As an example, the control unit 2 can also be made of a single-chip microprocessor, or can be made of a digital signal processing unit (DSP), or can be made of an FPGA gate array circuit, or can be made of a personal computer. It is composed of desktop computer, mobile computer, single-board computer or plug-in computer, and in some cases, it can also be a central processing unit composed of processors, such as DSP and FPGA.

As yet another example, in order to improve the waveform display, data acquisition, data statistical analysis, data storage or data communication speed of the oscilloscope 1, the control unit 2 can also be composed of multiple controllers, such as multiple single-chip A microprocessor or a control unit composed of a gate array FPGA device is used to process all or part of the above-mentioned operations in parallel, thereby increasing the information processing speed of the oscilloscope 1 .

In the preferred embodiment described in the present invention, keyboard unit 4 is a physical keyboard, i.e. physical keyboard, and it is connected with control unit 2, and the user can be arranged on the digital oscilloscope by keyboard unit 4 on the panel of oscilloscope 1 1 Make settings, such as completing the setting of the working state of the oscilloscope, the number of channels, sampling rate, trigger level, display content, display mode, communication mode settings, etc.

As yet another example, the keyboard of the oscilloscope 1 also uses a virtual keyboard, that is, a keyboard interface presented to the user through a computer screen or an oscilloscope screen. virtual keys on these virtual keyboards.

In the preferred embodiment selected by the present invention, the general information storage unit 8 can be used to store the waveform data from the data acquisition unit 3, the analysis data from the control unit 2, the control program of the control unit 2 and the description of each component and function. status information, etc.

In this preferred embodiment, the storage unit 8 is connected to the control unit 2, and may be wholly or partly composed of ferroelectric memory, and the ferroelectric storage (NvRam) mode can ensure that the setting state information is not lost in the power-off state.

In this preferred embodiment, the state memory of the present invention is made up of storage unit 7, and storage unit 7 is connected with control unit 2, is also made of ferroelectric memory, to ensure that under power-off state, setting state information not lost.

With continuous progress and development of technology, other types of memory including the above functions can also be used to form the storage unit 7 or 8 .

In this preferred embodiment, the display unit 5 is connected with the control unit 2, and can be used to display the waveform measured by the data acquisition unit 3, the analysis data output by the control unit 2, the setting status of the oscilloscope 1, and the like.

In this preferred embodiment, the communication unit 6 can be used to establish communication between the oscilloscope 1 and external devices, and the communication unit 6 can include a network port, through which the oscilloscope 1 can be directly connected to a local area network or a wide area network, so that external devices can communicate with each other. The oscilloscope 1 performs remote control or realizes mutual data transmission. The communication unit 6 can also have a USB port, a 232 serial port, and a GPIB instrument-specific interface. Through these interfaces, the oscilloscope 1 can be interconnected or communicated with other devices, such as realizing two Communication and data sharing between test equipment, and for example, with the help of these interfaces, the computer can easily combine multiple test equipment together to form a large-scale test system, such as combining signal sources, voltage sources, multimeters, and oscilloscopes. , forming a comprehensive test system.

In this preferred embodiment, the main function of the data acquisition unit 3 of the oscilloscope 1 is to collect the waveform signal of the device under test or components, and its structure will be different due to the different functions and performances of the oscilloscope, such as the data acquisition unit 3 will have different structures due to the number of channels, frequency range, test accuracy, sampling rate, etc. of the oscilloscope. For another example, when the oscilloscope 1 is a fluorescent oscilloscope or a portable oscilloscope, the structure will also be different. For example, when more analysis functions and other parameter test functions are added to the oscilloscope, such as DC measurement capability and signal output capability , if a function generator is added, its structure will be different, because these are all technical contents well known to those skilled in the art, so the details will not be repeated here.

In the preferred embodiment of the present invention, there is a state transition key, which is the same as other keys and knobs on the oscilloscope 1, and is an ordinary key located on the operation panel of the oscilloscope 1, together with other keys The keyboard unit 4 is formed, and the operation mode of the state conversion key can also be selected in the same manner as other function buttons, knobs and keys. In terms of physical structure, the state transition key is located in the keyboard array on the operation panel. Therefore, the keyboard unit 4 and the control unit 2 are connected to each other. When a key in the keyboard unit 4 is pressed, the keyboard unit 4 will generate a keyboard interrupt message or a keyboard instruction message and input it to the control unit 2 .

When the oscilloscope 1 is working, the control unit 2 is sensitive to the keyboard interruption information output by the keyboard unit 4, and executes the keyboard interruption information processing program 100, see FIG. 2 .

In the preferred embodiment of the present invention, control unit 2 executes keyboard interruption information processing program 100 after receiving the keyboard interruption information from keyboard unit 4, at first executes interruption timing step 101, counts the duration of keyboard interruption information, Then, enter the key type judgment step 102, judge whether the keyboard interrupt signal is generated from a common key or the described state transition key according to the key value, when the keyboard interrupt signal is generated from a common key, the control unit 2 executes the common key value processing step 103 , when the interrupt signal is generated from the state transition button, the control unit 2 enters the timing query step 104 to judge the duration of the interrupt signal from the state transition button, when the duration of the interrupt signal is greater than a specific threshold time value, the control unit 2 enters the state storage program 105, saves the setting state of the oscilloscope 1 in the storage unit 7, and when the duration of the interrupt signal is shorter than the specific threshold time value, the control unit 2 executes the state call The program 106 refers to the setting state stored in the storage unit 7 and performs setting processing on the oscilloscope 1 .

In the preferred embodiment selected by the present invention, the threshold time value is selected as 3 seconds, that is, when the time length of the keyboard interrupt signal from the state transition button is longer than 3 seconds, the control unit 2 judges that the The signal is a state storage instruction, and the state storage program 105 is executed. When the duration of the keyboard interrupt signal from the state conversion button is shorter than 3 seconds, the control unit 2 judges that the signal is a state call instruction, and the state call program 106 is executed.

In the preferred embodiment of the present invention, when the state transition button is pressed for a long time continuously, and each time the button is pressed for more than 3 seconds, the control unit 2 will execute the state storage program 105 multiple times. When the state transition key is pressed several times in succession for a short time, the control unit 2 will execute the state calling program 106 several times.

The threshold time value selected in this embodiment can be adjusted as required, for example, adjusted to 2 seconds or 4 seconds.

As yet another embodiment, as needed, when judging the time length of the keyboard interrupt signal from the state transition button, the keyboard interrupt signal shorter than the threshold time value can also be judged as a state storage instruction, and will be longer than The keyboard interrupt signal with the threshold time value is judged as a state calling instruction.

As yet another example, in some application occasions, the interrupt timing step 101 described in this embodiment can also be set before the timing query step 104, and only perform time statistics for the keyboard interrupt signal from the state transition key.

As an example, there are many ways to use one state transition button to issue two different interrupt instructions, namely state storage instruction and state call instruction:

For example, the state storage instruction and the state call instruction are distinguished by the number of times the button is pressed. Pressing the button twice in a row corresponds to sending the state storage instruction, and pressing the button only once corresponds to the state call instruction.

Another example is to use an alternate method to distinguish whether it is a state storage instruction or a state call instruction, such as a state storage instruction once, and a state call instruction next time, and the cycle continues. When using this alternate method, you can use lights on the buttons to assist. For example, when the lights are on, it means that the user presses the button again, and the signal sent is a state call command. For the virtual keyboard, the color of the button or the text on the button can also be used to indicate whether the instruction sent by the current button will be a state storage instruction or a state call instruction.

In the preferred embodiment selected by the present invention, after the control unit 2 enters the state storage program 105, the following three steps are executed in sequence, the first step is a clearing step 200, referring to Fig. 3, in this step, in the control unit Under the control of 2, the status information saved in the storage unit 7 is cleared, and then, the setting status information reading step 201 is executed, in this step, the control unit 2 will read the status information about the oscilloscope 1 from the storage unit 8 of the oscilloscope 1 Call out, and then execute the state information storage step 202 to save the state of the oscilloscope 1 obtained from the storage unit 8 in the storage unit 7 .

In the preferred embodiment selected by the present invention, the state setting information of the oscilloscope 1 includes the following three aspects of information:

1. Status information of common functions: such as turning on the sound, turning on the digital filter of the channel, changing the language of the current instrument in sequence, setting the interface of the instrument, etc. This type of functional information is usually stored in the form of a function. When executing the setting state information reading step 201, the control unit 2 is to take out the corresponding function calling state preserved in the storage unit 8, and then, in the state information storing step 202, save the calling state information of these functions in the storage Unit 7.

2. Function adjustment information: such as waveform brightness adjustment information, grid brightness information, trigger sensitivity information, channel offset, system time base information, etc. This type of state information is often a numerical value. When executing the setting state information reading step 201, the control unit 2 takes out the corresponding numerical values stored in the storage unit 8, and then stores these numerical values in the state information storage step 202. in the corresponding storage unit in storage unit 7 .

3. Peripheral function status information: This type of function information is to read and write an external hardware, such as storing files on an external U disk, operating a printer to print, etc. This type of functional information is usually also stored in the form of a function. But when this type of function is called, the called out function will judge whether the current hardware device supports it, and then perform the operation. Similarly, when executing the setting state information reading step 201, the control unit 2 is to take out the calling state of the corresponding function preserved in the storage unit 8, and then, in the state information storing step 202, save the calling state information of these functions In storage unit 7.

In the preferred embodiment that the present invention selects, after control unit 2 enters state calling program 106, execute state information type judgment step 301, referring to Fig. 4, at first control unit 2 visits storage unit 7, carries out type judgment to its information, For the status information belonging to common functions, the control unit 2 executes the function calling step 302 to call the corresponding function from the storage unit 7 so as to set the normal function status of the oscilloscope 1 . For the function adjustment status information, the control unit 2 executes the value call step 303 to fetch the value information from the storage unit 7 so as to set the components in the oscilloscope 1 that need to be adjusted. For the peripheral function state information, the control unit 2 executes the function call step 304, so as to set the peripheral function state.

State calling program 106 also executes an error judgment step 305 before performing the state setting of the equipment, in order to judge whether it is feasible to carry out state transition to oscilloscope 1, when no error is found, execute state setting step 306, directly to the state of oscilloscope 1 Make a reset. When an error is found in the error judgment step, for example, for the state information of common functions, when the oscilloscope 1 is in the alternate trigger mode, the new state setting needs to call out the delayed scan, and the error judgment step 305 will judge the error, and then execute the error In the processing step 307, there may be different processing methods for different errors. For example, for the above-mentioned errors, the error processing step 307 first prompts the user on the screen that the current operation is unavailable, and then restores all converted states to the state before calling . Another example is for function adjustment information, when the adjusted parameter value exceeds the limit value of the currently displayed function, the error handling step 307 will first prompt the user on the screen that the adjustment has reached the limit, and then adjust the parameter with the current limit value. Another example is trying to adjust the trigger level in the Roll mode. Obviously, this adjustment value is not available. At this time, the error handling step 307 will prompt the user on the screen that the current operation is not available, and no operation is performed. For another example, for peripheral device function status information, when the peripheral device is disconnected or there is a problem with the peripheral device communication, executing the state setting of calling the printer will make the error judgment step 305 report an error, and execute the error handling program 307, the error handling program 307 The user will be prompted on the screen to find problems with peripheral connections, and the system state will be restored to the state before the function call.

In this preferred embodiment, under the condition of not making mistakes, it is as convenient to execute the state calling key value processing step 106 as calling a function. For example, the user can use the state conversion button to save the digital filtering function with one key. Then, after inputting various signals, the digital filter function can be called out with one key of the state conversion button, so that the user can quickly and intuitively observe the change of the input signal before and after the channel digital filter function is turned on from the screen; for example, the user Store the channel "sticky" function into the state transition button, and you can directly observe the influence of the sticky function on and off when adjusting the channel offset by short pressing the button once.

The oscilloscope 1 described in this embodiment has the characteristics of fast state transition and convenient use. The user can save the current setting state of the test equipment in the "one-key save" mode, and can also use the "one-key restore" mode. The method is used to recall the saved setting state set by the user. When applied to different application environments, the oscilloscope 1 described in this embodiment can also be designed to only have a "one-key save" or "one-key restore" function. If it only has the "one-key recovery" function, the same method as the prior art is used to realize the setting state saving function of the oscilloscope 1, such as using the pull-down menu mode to enter the setting state saving menu of the device step by step, or step by step Select and save the state of the device.

In this embodiment, the oscilloscope 1 only uses one state transition button. In practical applications, multiple control buttons can also be designed for the oscilloscope 1, so as to save multiple setting states, so that when the user invokes the setting state, There are more options. For example: multiple virtual state transition keys can be designed on the display screen to save and recall different setting states. When saving and recalling the setting states, different virtual state transition keys can be selected to save and recall different setting status.

As yet another embodiment of the present invention, the test equipment can be fluorescent oscilloscopes, storage oscilloscopes, digital multimeters, digital multimeters, signal analyzers and other types of signal acquisition equipment; the test equipment described in the present invention can also be precision Signal generating devices such as digital power supply, reference signal source, digital signal generator, function generator, various waveform generators (such as sinusoidal signal generators), pulse signal generators; test equipment described in the present invention can also be Comprehensive test equipment, such as a signal generator with a waveform display function, a test system composed of an oscilloscope and a signal generator power supply system, etc., the test equipment of the present invention can also be those controlled by a computer, such as a virtual oscilloscope (Consists of test hardware and computer system, completes data acquisition and measurement under the control of the computer, displays the measurement results through the computer screen, or also includes waveforms and waveform data, etc.) etc. The test equipment described in the present invention can also be the test equipment or test system formed by those plug-in instruments, such as the test equipment formed by VXI and PCI bus structures.

Claims (10)

1. one kind has the testing apparatus that the state exchange function is set, and has a service part, a control assembly that is connected with described service part, a keyboard unit that is connected with described control assembly, it is characterized in that:

Also have a status register that is connected with described control assembly, have a state converting key in the keyboard unit, described state converting key produces state storage instruction or state call instruction; Described control assembly is to the described state storage instruction state that is provided with responsive, the current testing apparatus of preservation in status register; Described control assembly is to described state call instruction sensitivity, according to the content of preserving in the described status register, to the executing state setting of described testing apparatus.

2. equipment according to claim 1 is characterized in that: described state converting key both can produce the state storage instruction, also can produce the state call instruction.

3. equipment according to claim 2 is characterized in that:

It is state storage instruction or state call instruction that described control assembly is distinguished this signal according to the time length of the signal of described state converting key output.

4. equipment according to claim 3 is characterized in that:

Have a time threshold, described control assembly is for the interrupt instruction of the overtime threshold value of state converting key output, executing state storing step; Described control assembly is for the interrupt instruction that is shorter than time threshold of state converting key output, executing state invocation step.

5. according to claim 1,2,3 or 4 described equipment, it is characterized in that:

Described state converting key is a physical button.

6. according to claim 1,2,3 or 4 described equipment, it is characterized in that:

Described testing apparatus is a digital oscilloscope.

7. equipment according to claim 5 is characterized in that:

Described testing apparatus is a digital oscilloscope.

8. the control method with testing apparatus that the state exchange function is set is used for the testing apparatus described in claim 1,2,3,4,5,6 or 7, it is characterized in that:

After receiving the interrupt instruction of being sent by described keyboard unit, the control assembly of testing apparatus of the present invention is carried out following steps successively:

At first, the key class determining step is pressed in execution;

Then, when being described state converting key, judge that the interrupt instruction that button sends is state storage instruction or state call instruction by key class;

At last, the interrupt instruction of sending when button is the state storage instruction, carries out corresponding state storage step, and the interrupt instruction of sending when button is the state call instruction, carries out corresponding state invocation step.

9. method according to claim 8 is characterized in that:

Before the key class determining step is pressed in execution, also have one and interrupt the timing step, the time span of statistics button interrupt instruction;

After the key class determining step is pressed in execution, when being described state converting key by key class, whether the time span of judging the button interrupt instruction exceeds a time threshold, and whether exceed described time threshold according to the time span of button interrupt instruction, judge that the interrupt instruction that state converting key is sent is state storage instruction or state call instruction.

10. method according to claim 9 is characterized in that:

For the interrupt instruction that surpasses described time threshold of state converting key output, executing state storing step;

For the interrupt instruction that is shorter than described time threshold of state converting key output, executing state invocation step.

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