CN101470651A - System for detecting keyboard control function of electronic device - Google Patents

Abstract

A system for detecting the keyboard control function of an electronic device comprises a computer, a keyboard simulation program executed by the computer, and a keyboard simulation circuit connected with the computer and the column pins and the row pins of the electronic device. The keyboard simulation program comprises a plurality of key programs which respectively represent keys on a physical keyboard, and when any key program is triggered, the any key program can prompt the computer to transmit corresponding control data to the keyboard simulation circuit. The keyboard simulation circuit correspondingly conducts one of the column pins and one of the row pins of the electronic device according to the received control data. In this way, the action of pressing the key on the physical keyboard can be simulated. When the mode of pressing the analog key needs to be modified or increased, only the keyboard analog program needs to be modified, and the keyboard analog circuit does not need to be changed at all.

Description

System for detecting keyboard control function of an electronic device

【Technical field】

The present invention relates to the technology of detecting the keyboard control function of an electronic device, in particular to the detection technology of the so-called QWERTY keyboard.

【Background technique】

In the manufacturing process of an electronic device equipped with a keyboard, such as a personal digital assistant or a mobile phone, the manufacturer usually implements a "keyboard simulation test program" on the electronic device before the keyboard is actually assembled to determine its keyboard. Whether the control function is normal.

In the traditional keyboard simulation test procedure, an electronic device to be tested is firstly connected to a keyboard that has been confirmed to function normally, and then a tester presses each key on the keyboard with fingers. If the electronic device to be tested can correctly identify each button pressed by the tester and perform corresponding operations accordingly, it means that the electronic device to be tested is normal; otherwise, it means that the electronic device to be tested is normal. defective products.

A device for automatically generating key-press signals is mentioned in China Taiwan Announcement No. I242153. This device uses an m×1 multiplexer to connect n analog switches to simulate m×n buttons, and uses a first drive circuit and a second drive circuit to respectively drive the multiplexer and these analog switches, by This structure is used to generate m×n key signals to a circuit board. Using this device to test the circuit board does not require the tester to press the button, but because the device uses hardware circuits to simulate the button being pressed, it can only simulate a situation where the button is pressed, that is, the button is pressed. The order and the way they are pressed are unique and cannot be changed.

【Content of invention】

The invention provides a system for detecting the keyboard control function of an electronic device. The system uses software to control the hardware to simulate the state that a key on a keyboard is pressed.

More specifically, the system includes a computer, a keyboard simulation program is executed by the computer, and a keyboard simulation circuit is connected to the computer and the electronic device. The keyboard simulation program includes a plurality of key-press programs corresponding to the keys on a physical keyboard, and when any key-press program is triggered, the any key-press program will prompt the computer to send a corresponding control data to the keyboard simulation circuit . The keyboard simulation circuit includes a plurality of row terminals, a plurality of column terminals, and a plurality of control terminals, and is configured to receive control data through the control terminals, and conduct correspondingly according to the received control data. A row end and one of the column ends.

Since the row terminals are used to connect the row pins of the electronic device in parallel, the column terminals are used to connect the column pins of the electronic device in parallel, and the control terminals are used to connect the computer, therefore, Under the control of the keyboard simulation program, every time the computer sends a piece of control data to the keyboard simulation circuit, it will cause one row of pins on the electronic device to conduct with one of the column pins. , which is equivalent to the function of a physical button being pressed. In this way, the action of pressing a key on the physical keyboard can be simulated.

Preferably, in the present invention, the keyboard simulation circuit includes a row of multiplexers and a column of multiplexers. The row multiplexer has a plurality of parallel row terminals, a row of connection terminals, and a group of row control terminals, and is configured to correspondingly connect one of the row terminals and the row control terminal according to the row control data received by the group of row control terminals. The line connects the ends. The column multiplexer has a plurality of parallel column terminals, a column connection terminal, and a group of column control terminals, and is configured to correspondingly conduct one of the column terminals and the column control terminal according to the column control data received by the group of column control terminals. The column connects the ends. Wherein, the row connection end of the row multiplexer is connected to the column connection end of the column multiplexer. In short, the keyboard simulation circuit is only composed of one row of multiplexers and one column of multiplexers. The circuit structure is quite simple and meets the requirement of low cost.

The beneficial effect of the present invention is that when the system of the present invention is used to detect the keyboard control function of the electronic device, the physical keyboard is completely unnecessary, and no manpower is required to press the key. More importantly, the system of the present invention can easily change multiple simulation methods or add more simulation methods through the modification of the keyboard simulation program, so as to meet different test requirements, and these modifications will not change to hardware design.

【Description of drawings】

Figure 1 shows an equivalent circuit diagram when a QWERTY keyboard is connected to an electronic device;

Figure 2 shows a block diagram of a preferred example of the system of the present invention;

Fig. 3 shows the truth table of the row multiplexer and column multiplexer of the system of the present invention;

Fig. 4 shows the general structure of the keyboard simulation program of the system of the present invention;

Fig. 5 shows a comparison table, is used to point out the corresponding relation of each button program in the keyboard simulation program of the system of the present invention and each button on this QWERTY keyboard;

Fig. 6 shows the execution result of the screen program of the keyboard simulation program of the system of the present invention.

【Detailed ways】

FIG. 1 shows an equivalent circuit when a physical QWERTY keyboard 1 is connected to an electronic device 2 . The electronic device 2 generally refers to a mobile phone, a personal digital assistant, or other portable electronic devices. The electronic device 2 has a display 20 and a processor 21 . All the row lines m0-m7 of the QWERTY keyboard 1 are one-to-one connected to each row pin 210 of the processor 21, and all the column lines n0-n6 are one-to-one connected to the processing in the electronic device 2 Each row of pins 211 of the device 20. The row pins 210 and column pins 211 mentioned here may also refer to pins connected to a shift register (CPLD) of the processor 21 . The shift register is used to expand the number of pins to adapt to the QWERTY keyboard with more keys. The processor 21 scans the row lines of the QWERTY keyboard 1 by itself or through the shift register, and monitors the column lines of the QWERTY keyboard 1 to detect which row lines and column lines are guided. Pass. Further, when any key is pressed, a group of row lines and column lines connected to the key will be turned on, so that the corresponding row pins on the electronic device 2 are connected to the group of row lines and column lines 210 and column pin 211 will also be turned on, or short-circuited. For example, when the button K is pressed, the row line m6 and the column line n0 are turned on, and the row pins 210 and column pins 211 correspondingly connected to the group of row lines m6 and column lines n0 on the electronic device 2 are also turned on. And this logic change can be detected by the processor 21 immediately, which can be used as a basis for processing. Since different keys are pressed, different groups of row pins 210 and column pins 211 will be turned on. Therefore, the electronic device 2 only needs to detect which group of row pins 210 and column pins 211 is turned on. , you can correctly tell which button is pressed.

For convenience of description, the above-mentioned QWERTY keyboard 1 will be used as a simulated object and the above-mentioned electronic device 2 will be used as an object to be tested, but not limited thereto.

The block diagram of FIG. 2 is used to show the situation that the system of the present invention is used to detect the keyboard control function of the electronic device 2 . Wherein, each row pin 210 and column pin 211 on the electronic device 2 is not connected to the QWERTY keyboard 1 , but is connected to the system of the present invention.

As shown in the dotted line box in FIG. 2 , the system of the present invention includes a computer 3 , a keyboard simulation program 4 is executed by the computer 3 , and a keyboard simulation circuit 5 is connected to the computer 3 . The keyboard simulation circuit 5 includes a plurality of row terminals 50, a plurality of column terminals 51, and a plurality of control terminals 52, and is configured to connect the row terminals 50 and the control terminals 52 according to the control data received by the control terminals 52. One of the column ends 51 . In this example, a row of multiplexers 6 and a column of multiplexers 7 are used to form the keyboard simulation circuit 5, so the above-mentioned row end 50 is equivalent to the row end of the row of multiplexers 6, that is, its pins S0～S7, the above-mentioned column terminal 51 is equivalent to the column terminal of the column multiplexer 7, that is, its pins S0～S7, and the above-mentioned control terminal 52 is equivalent to the row control terminal of the row multiplexer 6, namely The combination of the pins EN, C1, C2, and C3 and the column control terminal of the column multiplexer 6 , that is, the pins EN, C1, C2, and C3. It is worth noting that the row multiplexer 6 also has a row of connection terminals 54, and the column multiplexer 7 also has a column connection terminal 55, and the row connection terminal 54 is connected to the column connection terminal 55, so that the row The multiplexer 6 is connected in series with the row of multiplexers 7 to form the keyboard simulation circuit 5 .

In the case that the row multiplexer 6 and the column multiplexer 7 both use the one-of-eight analog switch (CD4051 multiplexer), the pins S0-S7 of the two are the 12th, 13th, 14, 15, 1, 2, 4, and 5 pins, the two pins EN, C1, C2, C3 are the 6th, 9, 10, 11 pins of CD4051, and the row connection terminal 54 is connected to the column The connection terminal 55 is the third pin of CD4051. As far as its internal logic circuit is concerned, the CD4051 multiplexer can be regarded as a controllable multi-selection switch. Therefore, a simple switch symbol is used to represent it in Figure 2 for easy understanding. The truth table of the row multiplexer 6 and the column multiplexer 7 is further shown in FIG. 3 . It can be clearly understood from the table that the row multiplexer 6 can impel one row terminal 50 to conduct with its row connection terminal 54 according to the row control data received by its control terminal 52, and the column multiplexer 7 can also conduct according to the row control data received by its control terminal 52. The column control data received by the control terminal 52 can make one of the column terminals 51 and the column connection terminal 55 conduct. For example, when the row multiplexer 6 receives 0001 from its control terminal 52, its row terminal 50 numbered S1 and its row connection terminal 54 are turned on, and the rest can be analogized with reference to the truth table. Since the row connection terminal 54 is connected to the row connection terminal 55, so, for the whole keyboard simulation circuit 5, the control data received by these control terminals 52, that is, the row control data and the row control data can be combination to determine which row terminal 50 is connected to which column terminal 51. The positions indicated by the switch symbols in the figure are all S1, which means that the control terminal 52 of the multiplexer 6 in this row receives 0001, and the control terminal 52 of the multiplexer 7 in this column also receives 0001, so that the serial number of the multiplexer 7 is numbered S1 Both the row terminal 50 and the column terminal 51 numbered S1 are conductive.

When detecting the keyboard control function of the electronic device 2 , the computer 3 is connected to the control terminal 52 of the keyboard simulation circuit 5 via a control data bus 30 . Each row terminal 50 on the keyboard simulation circuit 5 is connected one-to-one to each row pin 210 of the processor 21 of the electronic device 2 via a row of data buses 31 . Each column terminal 51 on the keyboard simulation circuit 5 is connected to each column pin 211 of the processor 21 of the electronic device 2 via a column data bus 32 in a one-to-one manner. In this way, whenever the computer 3 transmits a piece of control data to the keyboard simulation circuit 5 via the control data bus 30, the row multiplexer 6 and the column multiplexer 7 of the keyboard simulation circuit 5 will respectively use the control data according to the control data. The row control data and column control data are connected to the corresponding row terminals 50 and column terminals 51, so that the row pins 210 and column pins 211 correspondingly connected to the group of row terminals 50 and column terminals 51 on the processor 21 Therefore, it is turned on, which is equivalent to the effect of a physical button being pressed for the electronic device 2 .

Fig. 4 shows the general structure of the keyboard simulation program 4, which includes a plurality of button programs 40 respectively corresponding to the keys on the QWERTY keyboard 1, and when any button program 40 is triggered, the any button program 40 will prompt The computer 3 sends a corresponding control data to the keyboard simulation circuit 5 .

FIG. 5 shows the corresponding relationship between the keys on the QWERTY keyboard 1 and these key programs 40 and their corresponding control data. The area 8 framed by the double frame line in the figure represents the QWERTY keyboard 1. There are many small partitions 80 in this area 8 to represent each button on the QWERTY keyboard 1 respectively, and they correspond to a key program 40 respectively, and some of them The small partition 81 is not used. Each partition 82 (S0-S7) in the upper horizontal first row in the figure respectively represents each row end 50 (S0-S7) mentioned above, and also corresponds to each row line (m0-m7) on the QWERTY keyboard 1 at the same time. , the 4bit data in each partition 83 in the second row represent the above-mentioned row control data respectively, that is to say, when the button program 40 corresponding to the corresponding small partition 80 is triggered, the computer 3 will set The 4bit data is sent to the control terminal 52 of the multiplexer 6 of the row. Each partition 84 (S0～S7) in the left longitudinal first row in the figure represents each column end 51 (S0～S7) mentioned above respectively, and also represents each column line (n0～n7) on the QWERTY keyboard 1 at the same time. ). The 4bit data in each partition 85 in the second row represent the above-mentioned column control data respectively, that is to say, when the button program 40 corresponding to the corresponding small partition 80 is triggered, the computer 3 will set the The 4bit data is sent to the control terminal 52 of the multiplexer 7 of the row.

For example, when the button program 40 corresponding to the small partition 80a representing the N button is triggered, it means that the computer 3 is currently simulating the situation that the N button on the QWERTY keyboard 1 is pressed under the control of the keyboard simulation program 4 , at this moment, the data in the small partition 83a corresponding to the small partition 80a is 0111, and the data in the small partition 85a corresponding to the small partition 80a is 0001, so the triggered button program 40 will require the computer 3 Send a piece of control data (01110001) composed of row control data (0111) and column control data (0001) to the keyboard simulation circuit 5. Next, the row multiplexer 6 will connect its row connection terminal 54 with the row terminal 50 numbered S7 according to the row control data (0111) received by its control terminal 52 . At the same time, the column multiplexer 7 will conduct the column connection terminal 55 and the column terminal 51 numbered S1 according to the column control data (0001) received by the control terminal 52 . This means that when the computer 3 sends a piece of control data whose content is 01110001 to the keyboard simulation circuit 5, the row end 50 numbered S7 and the column end 51 numbered S1 on the keyboard simulation circuit 5 are turned on, which is As far as the electronic device 2 is concerned, it is equivalent to a physical N button being pressed.

Please refer to FIG. 4 , the keyboard simulation program 4 further includes an automatic program 41 , and when the automatic program 41 is triggered, the automatic program 41 will trigger all key-press programs 40 in sequence. This means that the keyboard simulation program 4 can automatically simulate the pressing of all the physical keys on the QWERTY keyboard 1 through the hardware combination of the computer 3 and the keyboard simulation circuit 5, and the order of being pressed is also simulated by the keyboard Program 4 given.

In addition, based on the convenience of the detection operation, the keyboard simulation program 4 further includes a screen program 42, which enables the computer 3 to display a screen 9 as shown in Figure 6. The screen 9 includes a keyboard 90, which includes a plurality of The buttons 901 correspond to the button programs 40 respectively. When any button 901 is clicked, the corresponding button program 40 is triggered. Therefore, all the clicking actions of a tester on the keyboard 90 are equivalent to the actions of pressing the keys on the QWERTY keyboard 1 , and the functions of the two are consistent for the electronic device 2 .

Preferably, the screen 9 further includes a plurality of control buttons 91, and the automatic program 41 is arranged to be triggered, disabled, or stopped by the control buttons 91. For example, click the control button 91 marked as Test Mode, make it switch to the position marked as Auto, just can trigger this automatic program 41, make it switch to the position marked as Manual, will disable this automatic program 41, At this time, the inspector can only click the buttons 901 on the keyboard 90 , and each button 901 is clicked to trigger only one corresponding button program 40 . In addition, when the control button 91 labeled STOP is clicked, the running automatic program 41 will be stopped.

Preferably, the screen 9 further includes an adjustment button 92, and the automatic program 41 is further arranged to trigger all key-press programs 40 sequentially according to a time interval, and the size of the time interval is controlled by the adjustment button 92 of.

Through the above description, it can be understood that the system of the present invention simulates that the keys on the QWERTY keyboard 1 are pressed by means of software (keyboard simulation program 4) controlling hardware (keyboard simulation circuit 5). In this way, the keyboard control function of the electronic device is detected without using a physical keyboard at all, and without spending manpower to press the buttons. Because software is used to control the simulation method, when it is necessary to add or change the simulation method to meet different test requirements, only the software part needs to be modified, and there is no need to change the design of the hardware at all.

Claims (7)

1. A system for detecting the keyboard control function of an electronic device, the electronic device has a plurality of row pins and a plurality of column pins, the system comprising: A computer, a keyboard simulation program is executed by the computer, wherein the keyboard simulation program includes a plurality of button programs corresponding to the buttons on a physical keyboard, and when any button program is triggered, the any button program will cause The computer transmits corresponding control data; A keyboard simulation circuit, including a plurality of row terminals for one-to-one connection with the row pins of the electronic device, a plurality of column terminals for one-to-one connection with the column pins of the electronic device, and a plurality of control terminals for connection with the computer , and the keyboard simulation circuit is further configured to receive the control data sent from the computer through the control terminals, and correspondingly conduct one of the row terminals and one of the column terminals according to the received control data. 2. The system as claimed in claim 1, wherein the keyboard simulation program further comprises an automatic program, and when the automatic program is triggered, the automatic program will trigger all key-press programs in sequence. 3. The system according to claim 1, wherein the keyboard simulation program further includes a screen program, which enables the computer to display a screen, and the screen includes a keyboard, which includes a plurality of keys corresponding to the keys program, and when any button is clicked, the corresponding button program is triggered. 4. The system according to claim 3, wherein the keyboard simulation program further includes an automatic program, and the screen further includes a plurality of control buttons, wherein the automatic program is arranged to be triggered by the control buttons , disable, or stop, and when the automatic program is triggered, the automatic program will trigger all keystroke procedures in sequence. 5. The system according to claim 4, wherein the screen further includes an adjustment button, and the automatic program is further arranged to trigger all the button programs sequentially according to a time interval, and the size of the time interval It is controlled by the adjustment button. 6. The system according to claim 1, wherein the keyboard simulation circuit is composed of two multiplexers connected in series, wherein one multiplexer provides the row end, and the other multiplexer provides the column terminal, the two multiplexers jointly provide the control terminal. 7. A keyboard simulation circuit, characterized in that it comprises: A row of multiplexers has a plurality of parallel row terminals, a row of connection terminals, and a group of row control terminals, and is configured to correspondingly conduct one of the row terminals and the row control terminal according to the row control data received by the group of row control terminals the row connection; and A column multiplexer has a plurality of parallel column terminals, a column connection terminal, and a group of column control terminals, and is configured to be able to connect one of the column terminals and the column control terminal according to the column control data received by the column control terminal. the connection end of the column; Wherein, the row connection end of the row multiplexer is connected to the column connection end of the column multiplexer.

Images