CN102185601B - Keystroke function realizing method and device for hand-held frequency spectrograph - Google Patents

Abstract

The invention discloses a key function realization method and device of a hand-held spectrum analyzer. The key operation panel, the main processing module and the secondary processing module seen by the user jointly form a top-down unified interface message distribution mode. By adopting the technical scheme of the present invention, when performing function expansion and button adjustment on the main function button or sub-function selection button, it is only necessary to modify the text content of the button information at one time without making other modifications, which can effectively reduce code debugging and system maintenance. The workload of calling and reducing the demand for physical memory can not only reduce the complexity and cost requirements of hardware design, but also improve system reliability and facilitate system function adjustment and expansion. The method has the characteristics of good portability and easy debugging, and will effectively improve the mass production capacity of spectrum analyzers or instruments with similar functions.

Description

Method and device for realizing button function of handheld spectrum analyzer

technical field

The invention relates to the technical field of spectrum analyzers, in particular to a method and device for realizing key functions of a handheld spectrum analyzer.

Background technique

The hand-held spectrum analyzer has the characteristics of small size, few buttons, and many functions. With the increase of test requirements, the soft functions to be processed by the hand-held spectrum analyzer are showing an increasing trend. However, the physical function keys of the handheld spectrum analyzer generally do not exceed 20, and the actual use of the key functions under the multi-level menu has reached nearly 300, and the expanded measurement functions and potential application functions have not yet been included, so there are multi-level functions. The situation of button reuse under the menu. This places higher demands on the display, execution and further development of the keys. What kind of button function implementation method should be used to effectively simplify the complexity of the handheld spectrum analyzer button function design, reduce the workload of code debugging, reduce the occupation of physical memory, and improve the scalability of functions, which has become an important problem to be solved by those skilled in the art. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and device for realizing the button function of a handheld spectrum analyzer, which can effectively simplify the design complexity of the button function of the handheld spectrum analyzer, reduce the workload of code debugging, reduce the occupation of physical memory, and improve Functional scalability.

The technical solution adopted in the present invention is, the button function realization method of the handheld spectrum analyzer, the button operation panel of the handheld spectrum analyzer is provided with main function buttons, sub-function selection buttons, number buttons and direction navigation buttons, the method include:

Step 1, set up the key information of the main function key and the sub-function selection key in the form of a data structure, and store it in the secondary processing module; the secondary processing module corresponds to the main function key one by one;

Step 2, when the main function key is pressed, the main processing module passes the key type and parameters analyzed by the key value of the main function key to the secondary processing module corresponding to the main function key, and the secondary processing module according to the key type and parameters to find the key information of the main function key, and then execute the key response according to the key information;

Step 3, under a certain main function key, when the sub-function selection key is pressed, the main processing module will pass the key type and parameters analyzed from the key value of the pressed key in this step to the corresponding main function key. The second-level processing module, the second-level processing module looks up the key information of the pressed key according to the key type and parameters, and then executes the key response according to the key information;

Step 4, under a certain sub-function selection button, when a number button or a direction navigation button is pressed, the main processing module will pass the button type and parameters analyzed from the key value of the button pressed in this step to the main function The secondary processing module corresponding to the key, the secondary processing module executes the key response according to the key type and parameters and the key information of the sub-function selection key.

The present invention also proposes a device for realizing key functions of a handheld spectrum analyzer. The key operation panel of the handheld spectrum analyzer is provided with a main function button, a sub-function selection button, a number button and a direction navigation button, and the device is characterized in that include:

The key information establishment module is used to establish the key information of the main function key and the sub-function selection key in the form of a data structure, which is stored in the secondary processing module; the secondary processing module is in one-to-one correspondence with the main function key;

The main processing module is used to pass the key type and parameters analyzed from the key value of the main function key to the secondary processing module corresponding to the main function key when the main function key is pressed; , when the sub-function selection button is pressed, the key type and parameters analyzed by the key value of the pressed button are passed to the secondary processing module corresponding to the main function button; under a certain sub-function selection button, when the number When the key or direction navigation key is pressed, the key type and parameters analyzed from the key value of the pressed key are passed to the secondary processing module corresponding to the main function key associated with the sub-function selection key;

The secondary processing module is used to perform key response according to the key type and parameters sent by the main processing module and the key information of the relevant main function key or sub-function selection key.

Adopt above-mentioned technical scheme, the present invention has following advantage at least:

The button function realization method and device of the handheld spectrum analyzer of the present invention, the button operation panel, the main processing module and the secondary processing module seen by the user jointly form a top-down unified interface message distribution mode. By adopting the technical scheme of the present invention, when performing function expansion and button adjustment on the main function button or sub-function selection button, it is only necessary to modify the text content of the button information at one time without making other modifications, which can effectively reduce code debugging and system maintenance. The workload of calling and reducing the demand for physical memory can not only reduce the complexity and cost requirements of hardware design, but also improve system reliability and facilitate system function adjustment and expansion. The method has the characteristics of good portability and easy debugging, and will effectively improve the mass production capacity of spectrum analyzers or instruments with similar functions.

Description of drawings

Figure 1 is a schematic diagram of the physical button structure of the handheld spectrum analyzer;

Fig. 2 is a schematic diagram of the composition of the device for realizing the button function of the handheld spectrum analyzer according to the present invention;

Fig. 3 is a flow chart of the automatic display of buttons in the present invention;

Fig. 4 is a flow chart of realizing the first function of the present invention;

Fig. 5 is a schematic diagram of the menu display when the user presses the "scan" main function button;

Fig. 6 is a schematic diagram of the menu display when the user presses the first sub-function selection button "scanning time" in the menu display state of Fig. 5;

FIG. 7 is a schematic diagram of the menu display when the user presses the numeric key "1" in the menu display state of FIG. 6;

FIG. 8 is a schematic diagram of the menu display situation when the user presses the right button of the direction navigation in the menu display state of FIG. 6 .

Detailed ways

In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Let us first introduce the existing physical button structure of the handheld spectrum analyzer. As shown in Figure 1, the button operation panel used by the user includes 10 main function buttons, 7 sub-function selection buttons, number buttons and direction navigation buttons. The 10 main function keys include frequency marker, trace, measurement, sweep, frequency, span, amplitude, bandwidth, preset and system, etc. The 7 sub-function selection buttons are used for sub-function selection under each main function or unit selection in the case of digital input. The direction navigation button is used to adjust the value associated with the button step by step, for example: increase or decrease the value step by step in the way of the direction navigation button.

In the first embodiment of the present invention, a device for implementing button functions of a handheld spectrum analyzer, as shown in Figure 2, includes the following components:

1) Button information building module

The establishment key information of the main function key and the sub-function selection key in the form of data structure is stored in the secondary processing module. The secondary processing module is in one-to-one correspondence with the main function keys. The button information includes: button state, button ID label, button name, button attribute, value identifier, button associated value, status display identifier, status display content, upper-level menu entry, current-level menu entry, and lower-level menu entry. Among them, the button ID label is the number corresponding to the specific operation of each main function button or sub-function selection button, and the operation of the sub-function selection button in different situations corresponds to a different button ID number, for example: under the same main function button, press Different sub-function selection keys have different key ID labels; under different main function keys, the same sub-function selection keys also have different key ID labels. Each key ID label has other key information corresponding to it.

Key properties include: frequency, level, relative level, bandwidth, time and plain text display. Since the main function button has only one menu entry, it is placed in its own menu entry item, and the function of pressing the main function button is actually to provide the current level menu entry in the key information of the sub-function selection button.

2) Main processing module

When the main function key is pressed, the main processing module transmits the key type and parameters analyzed from the key value of the main function key to the secondary processing module corresponding to the main function key.

Under a certain main function key, when the sub-function selection key is pressed, the main processing module transmits the key type and parameters analyzed from the key value of the pressed key to the secondary processing module corresponding to the main function key.

Under a certain sub-function selection key, when a number key or direction navigation key is pressed, the main processing module will pass the key type and parameters analyzed from the key value of the pressed key to the main function associated with the sub-function selection key The secondary processing module corresponding to the button.

In the present invention, the main processing module is used as the only input interface connected to the user interface. When the current button is pressed, the hardware driver passes the key value of the button to the main processing module in the form of a main message. The key value of the key is analyzed, because the main processing module saves the corresponding relationship between the main function key, sub-function selection key, number key and direction navigation key and key value, for example, the key value of the main function key is 1-10, and the sub-function key The key values of the selection keys are 11-17, the key values of the number keys are 18-28, and the key values of the direction navigation keys are 29-32. When the main processing module obtains from the hardware driver that the key value of the user's key operation is 11, it is known that the first sub-function key is pressed according to the corresponding relationship. Therefore, the main processing module can initially obtain the key types and parameters by analyzing the keys. The key types include: menu display type, sub-function selection type, numerical input type, unit input type, and navigation input type. Due to the sub-function selection type and unit input These two types of keys are realized by multiplexing sub-function selection keys. The main processing module can only initially determine that the key is a sub-function selection type, and the secondary processing module will further determine whether the key is actually a unit. Input type.

The parameter indicates that the current key is the number one in a certain type, for example: key value 11 is the first sub-function key in the sub-function selection type of key.

Because the key value of the key can reflect which main function key is pressed, and the secondary processing module corresponds to the main function key one by one, so the main processing module also calls the corresponding secondary processing according to the key value of the current key module, and pass the key type and parameters to the secondary processing module in the form of a secondary message. When the value input button is pressed, the parameter of the button is the input value.

3) Secondary processing module

According to the settings of the main function keys, a secondary processing module with 10 functions including frequency standard, trace, measurement, sweep, frequency, span, amplitude, bandwidth, preset and system is respectively established. The secondary processing module can find the key information of the relevant main function key or sub-function selection key according to the key type and parameters.

The secondary processing module performs key response according to the key type and parameters sent by the main processing module and the key information of the relevant main function key or sub-function selection key.

Each secondary processing module further includes:

The multiplex button judgment processing module is used to record the type of each button. When the current button is a sub-function selection type, it is judged whether the last button is a numerical input type. If so, it indicates that the current button is actually a unit input type, and the unit to be called Input the processing module, otherwise call the sub-function selection processing module. Because the unit input type key is multiplexed with 7 sub-function selection keys, and its corresponding key value is also 11-17, so the key point of distinction is whether a number key was pressed last time.

The main menu display processing module corresponds to the menu display type, and is used to receive input from the 10 main function keys on the user operation panel, and display the main menu corresponding to the main function keys.

The sub-function selection processing module corresponds to the type of sub-function selection, and is used to receive input from the seven sub-function selection keys on the user operation panel, determine and display the menu corresponding to the current sub-function selection key.

The numerical input processing module corresponds to the numerical input type, and is used to receive the input of the numerical key. When the numerical identification of the sub-function selection key associated with the numerical key is valid, the input numerical value is saved and the numerical unit for selection is displayed.

The unit input processing module corresponds to the unit input type, and is used to receive the input of the sub-function selection button. If the value identifier is valid, determine the value unit according to the key type and parameters sent by the main processing module, and save it based on the value input The corresponding value of the button is updated and displayed. For example: when in the frequency menu, the user writes the value 10 through the numerical input processing module, and then selects kHz from the available numerical units, then the background will update the value associated with the key to 10000Hz, so that the previously entered value has a physical meaning .

The navigation input processing module corresponds to the navigation input type, and is used to receive the input of the direction navigation button. The key type and parameters of the key determine the value adjustment mode, and the key-associated value of the sub-function selection key is updated. For example: the key-associated value of the sub-function selection button associated with the direction navigation button is originally 10, and the step value of the preset direction navigation button is 1, and the step of 1 can be incremented by the direction navigation button, then press When the right button is used for down navigation, the background will update the value associated with the button to 11.

The second embodiment of the present invention is a method for realizing the button function of a handheld spectrum analyzer. The button operation panel of the handheld spectrum analyzer is provided with a main function button, a sub-function selection button, a number button and a direction navigation button, which specifically includes the following steps :

Step 1: Establish the key information of the main function key and the sub-function selection key in the form of a data structure, and store them in the secondary processing module.

The button information includes: button state, button ID label, button name, button attribute, value identifier, button associated value, status display identifier, status display content, upper-level menu entry, current-level menu entry, and lower-level menu entry. Key properties include: frequency, level, relative level, bandwidth, time and plain text display. The main function keys on the key operation panel of the handheld spectrum analyzer respectively correspond to the secondary processing modules of the main function keys.

Step 2, when the main function key is pressed, the main processing module will pass the key type and parameters analyzed by the key value of the main function key to the secondary processing module corresponding to the main function key, and the secondary processing module will and parameters to find the key information of the main function key, and then execute the key response according to the key information.

Key types include: menu display type, sub-function selection type, numerical input type, unit input type and navigation input type. The parameter indicates the number of the current key in a certain type, for example: key value 11 is sub-function selection The first sub-function button in the type button. When the value input button is pressed, the parameter of the button is the input value.

The secondary processing module executes the key response according to the key information of the main function key, and the specific process includes: according to the current-level menu entry of the main function key, executes the key automatic display process for all sub-function selection keys in turn.

Press the button to automatically display the process, as shown in Figure 3, including:

Step A1, judging whether the state of the button is valid, if so, jump to step A2, otherwise set the display content of the button to be empty, and the process ends;

Step A2, judging whether the status display flag is valid, if so, display the content of the status display, and skip to step A3, otherwise directly skip to step A3;

Step A3, judge whether the value identifier is valid, if so, skip to step A4, otherwise display the key name;

Step A4, display the value associated with the button according to the attribute of the button, and display the name of the button.

Step 3: Under a certain main function key, when the sub-function selection key is pressed, the main processing module will pass the key type and parameters analyzed from the key value of the pressed key in this step to the secondary function key corresponding to the main function key. The processing module, the secondary processing module finds the key information of the pressed key according to the key type and parameters, and then executes the key response according to the key information;

The secondary processing module executes the key response process, which sequentially includes: the multiplexing function judgment process, the first function realization process, and the key automatic display process for all sub-function selection keys in turn according to the recorded menu entry, wherein:

The multiplexing function judgment process includes:

Determine whether the last key press is a numerical input type, if so, then execute the key response according to the key information of the unit input type and the pressed sub-function selection key, otherwise jump to the first function realization process;

Further, the process of executing the key response according to the unit input type and the key information of the pressed sub-function selection key includes: the second function realization process and the key automatic display process;

The second function implementation process specifically includes: in the case that the value identification of the sub-function selection button pressed in step 3 is valid, determine the value unit according to the key type and parameters sent by the main processing module, and update the value based on the value saved when the value is entered The key-associated value of the key it is on.

Further, the first function realization process specifically includes:

Step B1, recording the button ID label of the pressed sub-function selection button;

Step B2, judging whether the state display flag of the pressed sub-function selection button is valid, if so, updating the state display content according to the ID label of the button, and jumping to step B3, otherwise directly jumping to step B3;

Step B3, judging whether the value identification of the pressed sub-function selection button is valid, if so, keep the record of the button ID label unchanged, record the menu entry of the current level, and the process ends, otherwise jump to step B4;

Step B4, judge whether the lower-level menu entry of the pressed sub-function selection button is valid, if so, record the lower-level menu entry, and record the key ID label of the sub-function selection button in the lower-level menu, the process ends, otherwise skip Go to step B5;

Step B5, judging whether the upper menu entry of the pressed sub-function selection button is valid, if so, recording the upper-level menu entry, and recording the key ID label of the sub-function selection button in the upper menu, otherwise maintaining the button ID label The record of the menu remains unchanged, and the content of the menu entry of this level is recorded.

Step 4, under a certain sub-function selection button, when a number button or a direction navigation button is pressed, the main processing module will pass the button type and parameters analyzed from the key value of the button pressed in this step to the main function The secondary processing module corresponding to the key, the secondary processing module executes the key response according to the key type and parameters and the key information of the current sub-function selection key.

1) When the number key is pressed, the secondary processing module executes the key response process according to the key type and parameters and the key information of the current sub-function selection key, including: the value saving process, which includes:

In step 4, if the value identification of the current sub-function selection key is valid, save the value input through the number keys and display the numerical unit for selection according to the attribute of the current sub-function selection key. Specifically, the numerical units may be sequentially displayed on the sub-function selection buttons in the manner of displaying the names of the buttons through the button display process.

2) When the direction navigation button is pressed, the secondary processing module executes the button response according to the button type and parameters and the button information of the sub-function selection button, including: the third function realization process and the button automatic display process, wherein:

The third function implementation process specifically includes: in step 4, when the numerical value identification of the current sub-function selection key is valid, determine the value adjustment method according to the key type and parameters of the direction navigation key sent by the main processing module, and update the current sub-function selection The key-associated value of the key.

Based on the structure of the hand-held spectrum analyzer, the present invention proposes a data classification method corresponding to the function attributes of keys, and forms a top-down unified interface message distribution mode. With this method, when constructing a new main function button, a unified button information text initialization method can be followed, which is simple and clear, and the storage requirements for the hardware of the button menu are minimized; When function expansion or button adjustment is required, only the initialization content of the button information text needs to be modified, and no other modification is required; from the perspective of the top-level application, the complex logical relationship between buttons is simplified, and the calling interface is simple. To achieve the purpose of improving system reliability and reducing the amount of code and debugging workload. Its coding based on c language has higher portability and can be well applied in various development platforms.

Let’s take the response after pressing the main function button of “Scan” and the response of some sub-function selection buttons under the main menu as an example to introduce the implementation effect of this application:

Assume that the only menu entry provided by the "sweep" main function button is sweep1, which is used as the menu entry of all sub-function selection buttons at this level. The first sub-function selection button under the main menu is the "sweep time" button, and the spectrum analyzer is initialized when it is turned on. The frequency main menu is displayed by default.

Operation 1: The user presses the "Scan" main function button

The secondary processing module executes the main menu display branch, so the menu entry of this level is sweep1. After calling the key to automatically display the process, the 7 sub-function selection buttons on the left column display the menu entry of the current level menu of sweep1, because you can use the bottom sub-function Select the button to turn the page of the menu, and the column on the right is the content displayed at the lower-level menu entry of the 7 sub-function selection buttons, as shown in Figure 5. If the next page is turned by pressing the bottom sub-function selection button, for the right column, the current state is the content displayed at the current level menu entry, while the left column is the content displayed at the upper level menu entry.

Operation 2: The user presses the first sub-function selection button "Scan Time"

The second-level processing module executes the sub-function selection branch, the button ID label of the "sweep time" button is the current button ID label, the status display content is switched from "automatic * manual" to "automatic manual *", the menu entry is still sweep1, execute the button After the process is automatically displayed, the menu display is shown in Figure 6. When the button is pressed, the status display content changes.

Operation 3: If the user presses the numeric key "1" after operation 2

The secondary processing module executes the numerical input branch, saves and displays the numerical value "1" on the interface, and then the seven sub-function selection buttons are displayed as numerical units for selection, as shown in Figure 7.

Operation 4: If the user presses the second sub-function selection button on the basis of operation 3

The second-level processing module executes the unit input branch, which means that the second unit "ms" is selected. Combined with the previously saved value, the associated value of the "scanning time" key is updated to 1ms, and the background saves it as 0.001s. The scanning time value Updated. At the same time, the menu entry is still sweep1, and after the automatic key display process is executed, the menu display is roughly the same as that in Figure 6, except that the key-associated value of the first sub-function selection key is changed from 4ms to 1ms and displayed.

Operation 5: If the user presses the direction navigation (right) button immediately after operation 2

The secondary processing module executes the navigation input branch, which is defined by the function code writer according to the requirements. Assuming that the step value of the scan time is 1ms, the value associated with the key of the "scan time" is updated to 5ms, and the value saved in the background is 0.005s. The value is updated. At the same time, the menu entry is still sweep1, and after the automatic display process is executed by pressing the button, the menu display is shown in Figure 8.

Through the description of the specific implementation, it should be possible to gain a deeper and more specific understanding of the technical means and effects of the present invention to achieve the intended purpose. However, the attached drawings are only for reference and description, and are not used to explain the present invention. limit.

Claims (9)

1. a button function realization method of a handheld spectrum analyzer, said handheld spectrum analyzer button operation panel is provided with a main function button, a sub-function selection button, a number button and a direction navigation button, it is characterized in that, comprising: Step 1, set up the key information of the main function key and the sub-function selection key in the form of a data structure, and store it in the secondary processing module; the secondary processing module corresponds to the main function key one by one; Step 2, when the main function key is pressed, the main processing module passes the key type and parameters analyzed by the key value of the main function key to the secondary processing module corresponding to the main function key, and the secondary processing module according to the key type and parameters to find the key information of the main function key, and then execute the key response according to the key information; Step 3, under a certain main function key, when the sub-function selection key is pressed, the main processing module will pass the key type and parameters analyzed from the key value of the pressed key in this step to the corresponding main function key. The second-level processing module, the second-level processing module looks up the key information of the pressed key according to the key type and parameters, and then executes the key response according to the key information; Step 4, under a certain sub-function selection button, when a number button or a direction navigation button is pressed, the main processing module will pass the button type and parameters analyzed from the key value of the button pressed in this step to the main function A secondary processing module corresponding to the key, the secondary processing module executes a key response according to the key type and parameters and the key information of the sub-function selection key; The secondary processing module further includes: The multiplex button judgment processing module is used to record the type of each button. When the current button is a sub-function selection type, it is judged whether the last button is a numerical input type. processing module, otherwise call the sub-function selection processing module; The main menu display processing module corresponds to the menu display type, and is used to receive the input of the main function key and display the main menu corresponding to the main function key; The sub-function selection processing module corresponds to the sub-function selection type, and is used to receive the input of the sub-function selection key, determine and display the menu corresponding to the current sub-function key; The numerical input processing module corresponds to the numerical input type, and is used to receive the input of the numerical key, and when the numerical identification of the sub-function selection key associated with the numerical key is valid, save the input numerical value and display the numerical unit for selection; The unit input processing module corresponds to the unit input type, and is used to receive the input of the sub-function selection button. If the value identifier is valid, determine the value unit according to the key type and parameters sent by the main processing module, and save it based on the value input Update the value associated with the button where it is located and display it; The navigation input processing module corresponds to the navigation input type, and is used to receive the input of the direction navigation button. The key type and parameters of the key determine the value adjustment mode, and the key-associated value of the sub-function selection key is updated. 2. according to the button function realization method of the said handheld spectrum analyzer of claim 1, it is characterized in that, The button information includes: button state, button ID label, button name, button attribute, value identifier, button associated value, status display identifier, status display content, upper-level menu entry, current-level menu entry, and lower-level menu entry. The properties of the key include: frequency, level, relative level, bandwidth, time and plain text display; The key types include: main menu display type, sub-function selection type, numerical input type, unit input type and navigation input type. 3. The key function realization method of the handheld spectrum analyzer according to claim 2, wherein in step 2, when the main function key is pressed, the secondary processing module executes the key response according to the key information of the main function key, The specific process includes: according to the menu entry of the main function key, execute the key automatic display process for all sub-function selection keys in turn; Press the key to automatically display the process, including: Step A1, judging whether the state of the button is valid, if so, jump to step A2, otherwise set the display content of the button to be empty, and the process ends; Step A2, judging whether the status display flag is valid, if so, display the content of the status display, and skip to step A3, otherwise directly skip to step A3; Step A3, judge whether the value identifier is valid, if so, skip to step A4, otherwise display the key name; Step A4, display the value associated with the button according to the attribute of the button, and display the name of the button. 4. according to the button function realization method of the described handheld spectrum analyzer of claim 2, it is characterized in that, in step 3, when the sub-function selection button is pressed, the secondary processing module selects the type and the sub-function according to the sub-function The process of executing the key response of the key information of the function selection key includes in turn: the multiplexing function judgment process, the first function realization process, and the key automatic display process for all sub-function selection keys in turn according to the recorded menu entry; The multiplexing function judgment process specifically includes: Judging whether the last key is of the numerical input type, if so, then execute the key response according to the unit input type and the key information of the sub-function selection key, otherwise jump to the first function realization process; The first function realization process specifically includes: Step B1, recording the button ID label of the pressed sub-function selection button; Step B2, judging whether the state display flag of the pressed sub-function selection button is valid, if so, updating the state display content according to the ID label of the button, and jumping to step B3, otherwise directly jumping to step B3; Step B3, judging whether the value identification of the pressed sub-function selection button is valid, if so, keep the record of the button ID label unchanged, record the menu entry of the current level, and the process ends, otherwise jump to step B4; Step B4, judge whether the lower-level menu entry of the pressed sub-function selection button is valid, if so, record the lower-level menu entry, and record the key ID label of the sub-function selection button in the lower-level menu, the process ends, otherwise skip Go to step B5; Step B5, judging whether the upper menu entry of the pressed sub-function selection button is valid, if so, recording the upper-level menu entry, and recording the key ID label of the sub-function selection button in the upper menu, otherwise maintaining the button ID label The record of the menu remains unchanged, and the content of the menu entry of this level is recorded. 5. The key function realization method of the handheld spectrum analyzer according to claim 4, characterized in that, according to the unit input type and the key information of the sub-function selection key, the process of performing the key response comprises in turn: the second function realization process and keys to automatically display the process; The implementation process of the second function specifically includes: in the case that the numerical identification of the sub-function selection key described in step 3 is valid, determine the numerical unit according to the key type and parameters sent by the main processing module, and determine the numerical unit based on the numerical value saved when the numerical value is entered. Update the key-associated value of the key it is on. 6. according to claim 2 or 3 or 4 or 5 described hand-held spectrum analyzer button function realization method, it is characterized in that, in step 4, when digital button is pressed, secondary processing module according to button type and parameter and the The process of executing the key response of the key information of the sub-function selection key includes: the process of saving the value, which includes: In step 4, if the numerical value identification of the sub-function selection key is valid, save the value input through the number key and display the numerical unit for selection according to the attribute of the sub-function selection key. 7. The key function realization method of the handheld spectrum analyzer according to claim 2 or 3 or 4 or 5, characterized in that, in step 4, when the direction navigation key is pressed, the secondary processing module according to the key type and parameters and The key information of the sub-function selection key executes the key response, which includes in turn: the third function realization process and the key automatic display process; The third function realization process specifically includes: when the numerical value identification of the sub-function selection key described in step 4 is valid, determine the numerical adjustment mode according to the key type and parameters of the direction navigation key sent by the main processing module, and update the Describe the key-associated value of the sub-function selection key. 8. A device for realizing button functions of a handheld spectrum analyzer, the button operation panel of the handheld spectrum analyzer is provided with a main function button, a sub-function selection button, a number button and a direction navigation button, and it is characterized in that the device includes: The key information establishment module is used to establish the key information of the main function key and the sub-function selection key in the form of a data structure, which is stored in the secondary processing module; the secondary processing module is in one-to-one correspondence with the main function key; The main processing module is used to pass the key type and parameters analyzed from the key value of the main function key to the secondary processing module corresponding to the main function key when the main function key is pressed; , when the sub-function selection button is pressed, the key type and parameters analyzed by the key value of the pressed button are passed to the secondary processing module corresponding to the main function button; under a certain sub-function selection button, when the number When the key or direction navigation key is pressed, the key type and parameters analyzed from the key value of the pressed key are passed to the secondary processing module corresponding to the main function key associated with the sub-function selection key; The secondary processing module is used to perform key response according to the key type and parameters sent by the main processing module and the key information of the relevant main function key or sub-function selection key; The secondary processing module further includes: The multiplex button judgment processing module is used to record the type of each button. When the current button is a sub-function selection type, it is judged whether the last button is a numerical input type. processing module, otherwise call the sub-function selection processing module; The main menu display processing module corresponds to the menu display type, and is used to receive the input of the main function key and display the main menu corresponding to the main function key; The sub-function selection processing module corresponds to the sub-function selection type, and is used to receive the input of the sub-function selection key, determine and display the menu corresponding to the current sub-function key; The numerical input processing module corresponds to the numerical input type, and is used to receive the input of the numerical key, and when the numerical identification of the sub-function selection key associated with the numerical key is valid, save the input numerical value and display the numerical unit for selection; The unit input processing module corresponds to the unit input type, and is used to receive the input of the sub-function selection button. If the value identifier is valid, determine the value unit according to the key type and parameters sent by the main processing module, and save it based on the value input Update the value associated with the button where it is located and display it; The navigation input processing module corresponds to the navigation input type, and is used to receive the input of the direction navigation button. The key type and parameters of the key determine the value adjustment mode, and the key-associated value of the sub-function selection key is updated. 9. The device for realizing the button function of the handheld spectrum analyzer according to claim 8, characterized in that, The button information includes: button state, button ID label, button name, button attribute, value identifier, button associated value, status display identifier, status display content, upper-level menu entry, current-level menu entry and lower-level menu entry; The properties of the key include: frequency, level, relative level, bandwidth, time and plain text display; The key types include: menu display type, sub-function selection type, numerical input type, unit input type and navigation input type.

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