CN112073070A - Time-sharing dynamic transformation key position scanning method and system - Google Patents
Time-sharing dynamic transformation key position scanning method and system Download PDFInfo
- Publication number
- CN112073070A CN112073070A CN202011000262.XA CN202011000262A CN112073070A CN 112073070 A CN112073070 A CN 112073070A CN 202011000262 A CN202011000262 A CN 202011000262A CN 112073070 A CN112073070 A CN 112073070A
- Authority
- CN
- China
- Prior art keywords
- port
- low level
- ports
- time
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000009466 transformation Effects 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000009191 jumping Effects 0.000 claims abstract description 23
- 238000004364 calculation method Methods 0.000 claims description 9
- 230000006872 improvement Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/20—Dynamic coding, i.e. by key scanning
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention provides a time-sharing dynamic transformation key scanning method and a time-sharing dynamic transformation key scanning system, wherein the time-sharing dynamic transformation key scanning method comprises the following steps: step S1, configuring one IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports; step S2, scanning the high and low level states of the input port in sequence, judging whether the input port is at low level in real time, if so, jumping to step S3, and if not, returning to step S1; step S3, determining whether two or more input ports are at low level at the same time, otherwise, jumping to step S4, if yes, returning to step S1; step S4, reading the output port J and the input port K outputting low level, and calculating the position of the column number and the position of the row number of the corresponding key. The invention effectively avoids the problem of wrong judgment of key positions, reduces the production cost, improves the accuracy and the effectiveness of key position scanning, and can well meet the requirement of industrial products on large information data.
Description
Technical Field
The invention relates to a key scanning method, in particular to a time-sharing dynamic transformation key scanning method, and relates to a time-sharing dynamic transformation key scanning system comprising the time-sharing dynamic transformation key scanning method.
Background
The key scanning circuit in the existing circuit is various and has various patterns, the voltage division type AD conversion is realized, the comparator circuit is realized, the line scanning mode is also adopted, the structure is complex, the function is complex, the key scanning function with multiple functions is usually completed by adopting the driving circuit with a complex circuit structure, and a plurality of IO resources are occupied, so that the cost is higher on the one hand, meanwhile, after the circuit structure and the algorithm are complex, some unstable factors can be brought, invisible risks are brought to products, the testing cost is increased, and the qualification rate of the products is reduced.
The functions of the existing products with key positions are more and more complex, the required keys are more and more, the IO used by the keyboard circuit is more, the required pins are more, and the cost is higher. Along with the increasingly fierce competition, manufacturers want to reduce the product cost reasonably by twisting the reduction of IO ports, and therefore, the manufacturers also develop novel key position scanning circuits, but the manufacturers also face a new problem, namely how to realize more accurate and rapid key position scanning on the basis of reducing the number of the IO ports so as to meet the requirement of industrial products on large information data.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a time-sharing dynamic transformation key scanning method capable of improving the accuracy and the effectiveness of key scanning, and further provide a time-sharing dynamic transformation key scanning system comprising the time-sharing dynamic transformation key scanning method.
In view of the above, the present invention provides a time-sharing dynamic key position changing scanning method, which comprises the following steps:
step S1, configuring one IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports;
step S2, scanning the high and low level states of the input ports in sequence, judging whether the input ports are low level in real time, if yes, jumping to step S3, if not, returning to the step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and using other IO ports as the input ports;
step S3, judging whether two or more input ports are low level at the same time, if not, jumping to step S4, if yes, returning to step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports;
and step S4, reading the output port J and the input port K outputting the low level, and calculating the column position and the row position of the corresponding key through the output port J and the input port K, where J is the output port number of the current output low level, and K is the input port number of the low level detected by the output port J when outputting the low level.
In a further improvement of the present invention, in the step S4, the column number and position L of the key are calculated by the formula L = ((K + N-2)% N) +1, where N is the total number of IO ports and% is the modulo operator.
A further improvement of the present invention is that the step S4 calculates the number of rows position H of the key by the formula H = (((N-J)% N) + L)% N) + 1.
In a further improvement of the present invention, when the total number of IO ports is greater than or equal to 4, the step S1 includes the following sub-steps:
s101, configuring IO ports A1 to An as input ports, configuring IO port A1 to output low level independently, and then jumping to step S2 to scan the IO ports A2 to the IO ports An in sequence, wherein n is the serial number of the last IO port;
step S102, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure the IO ports A1 to the IO ports An as the input ports, configuring the IO ports A2 independently to output low level, and then jumping to step S2 to scan the IO ports A1, the IO ports A3 to the IO ports An in sequence;
step S103, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure IO ports A1 to An to be input ports, independently configuring IO port A3 to output low level, and then jumping to step S2 to scan IO port A1, IO port A2, IO port A4 to the IO port An in sequence;
and step S104, returning to repeat the steps, circulating until the IO port An is configured independently to output low level, and then jumping to step S2 to scan the IO port A1 to the IO port An-1 in sequence.
In a further improvement of the present invention, in the step S3, when the input ports are low in different time periods, the operation jumps to the step S4 to calculate the column position and the row position.
In the step S4, the column position and row position are calculated according to the output port J and input port K outputting low level in the current time period, then the time period corresponding to the next input port being low level is switched to, and the new input port K is read to calculate the column position and row position of the next key position, and this is repeated.
In a further development of the invention, n is 5.
In a further improvement of the present invention, in the step S2, the high and low states of the input port are sequentially scanned, and a time chart of dynamic scanning of the input port is recorded, and when the input port is at a low level, the serial number of the input port is identified.
The invention also provides a time-sharing dynamic transformation key scanning system, which comprises a time-sharing dynamic transformation keyboard and the time-sharing dynamic transformation key scanning method, wherein the time-sharing dynamic transformation keyboard is a linear time-sharing dynamic transformation keyboard, the power VCC is respectively connected to the IO ports in one-to-one correspondence through pull-up resistors, the plurality of IO ports are connected in parallel, and the time-sharing dynamic transformation keyboard adopts the time-sharing dynamic transformation key scanning method to realize key scanning.
Compared with the prior art, the invention has the beneficial effects that: the independently designed time-sharing dynamic transformation key scanning method can quickly respond to the key information of the time-sharing dynamic transformation keyboard, effectively avoids the problem of wrong judgment of key positions on the basis of meeting the one-line connection requirement and quick response, reduces the production cost, improves the accuracy and the effectiveness of key position scanning, and can well meet the requirement of industrial products on large information data.
Drawings
FIG. 1 is a schematic workflow diagram of one embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a time-sharing dynamic transformation keyboard according to an embodiment of the present invention;
FIG. 3 is a timing diagram of dynamic key bit scanning according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, this example provides a time-sharing dynamic key mapping scanning method, which includes the following steps:
step S1, configuring one IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports;
step S2, scanning the high and low level states of the input ports in sequence, judging whether the input ports are low level in real time, if yes, jumping to step S3, if not, returning to the step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and using other IO ports as the input ports;
step S3, determining whether two or more (i.e., multiple) input ports are at low level at the same time, if not, jumping to step S4, if yes, returning to step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and the other IO ports are input ports;
and step S4, reading the output port J and the input port K outputting the low level, and calculating the column position and the row position of the corresponding key through the output port J and the input port K, where J is the output port number of the current output low level, and K is the input port number of the low level detected by the output port J when outputting the low level.
In practical application, a time-sharing dynamic transformation keyboard may be built, as shown in fig. 2, of course, fig. 2 shows a preferred time-sharing dynamic transformation keyboard of 5 × 5, and during application, the time-sharing dynamic transformation keyboard of different specifications, such as 3 × 3 or 4 × 4, may be adjusted according to actual requirements, and the time-sharing dynamic transformation keyboard includes N IO ports, which are respectively named as a1, a2, … …, An, and N is a serial number of the last IO port, and if N is 5, the time-sharing dynamic transformation keyboard represents 5 IO ports in total.
Each IO port can be dynamically switched into an output port and an input port, if the IO ports are sequentially and dynamically converted into an output low level, and the output ports are input ports, each dynamic conversion is configured with a unique output port, and correspondingly scans the corresponding other input ports, namely each IO port is connected with a plurality of keys in the time-sharing dynamic conversion keyboard, when the input ports are not pressed down, the input ports are maintained to be high level by a pull-up resistor, when the keys are pressed down, each group of keys are one-to-one corresponding to the corresponding input ports to be changed into low level, and whether the keys are pressed down can be positioned by judging whether the corresponding input ports are low level or not; however, in practical application, because each IO port is connected with more than one key, but one group, if there is no suitable algorithm and corresponding key scanning method, the problems of misjudgment, error and slow response speed will occur.
Therefore, in the present embodiment, first, after the input ports are determined to be at the low level in the step S2, it is further determined whether two or more input ports are at the low level at the same time in the step S3, and if not, the process goes to the step S4, so that the problem of erroneous touch or erroneous determination can be avoided; in addition, in this example, the column number position L of the key is calculated through the formula L = ((K + N-2)% N) +1 in step S4, where N is the total number of IO ports and% is a modulo operator, and on the basis of calculating the column number position L, there are multiple keys in each column, and in this example, in step S4, the row number position H of the key is calculated through the formula H = ((((N-J)% N) + L)% N) +1, so that the column number position and the row number position of the key can be quickly and accurately located, and then the accuracy of key scanning is further ensured, the calculation formula is simple and effective, and no complicated calculations such as multiple power are involved, so that the practical performance is high.
When the total number of IO ports is greater than or equal to 4 (preferably n = 5), the step S1 includes the following sub-steps:
s101, configuring IO ports A1 to An as input ports, configuring IO port A1 to output low level independently, and then jumping to step S2 to scan the IO ports A2 to the IO ports An in sequence, wherein n is the serial number of the last IO port;
step S102, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure the IO ports A1 to the IO ports An as the input ports, configuring the IO ports A2 independently to output low level, and then jumping to step S2 to scan the IO ports A1, the IO ports A3 to the IO ports An in sequence;
step S103, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure IO ports A1 to An to be input ports, independently configuring IO port A3 to output low level, and then jumping to step S2 to scan IO port A1, IO port A2, IO port A4 to the IO port An in sequence;
and step S104, returning to repeat the steps, circulating until the IO port An is configured independently to output low level, and then jumping to step S2 to scan the IO port A1 to the IO port An-1 in sequence. The steps are repeatedly and circularly executed, and the scanning of the time-halving dynamic transformation keyboard can be continuously realized.
In the embodiment, the IO ports a1 to An are firstly configured as input ports, because of a one-line connection mode, the configuration is more reasonable, effective and quick, then the IO port a1 is independently configured to output a low level as An output port, and the other IO ports are input ports to execute the step S2 and subsequent jumping and scanning; and then, configuring the IO ports A1 to An IO port An as input ports, then independently configuring the IO port A2 to output low level as An output port, and executing the step S2 and subsequent jumping and scanning by using other IO ports as input ports, and repeating the steps … … and so on, thereby well realizing dynamic scanning, and being stable and reliable.
As shown in fig. 3, in step S3, when the input ports are low in different time periods, the method goes to step S4 to calculate the column position and the row position. It should be noted that, unlike the operation of determining whether two or more input ports are at low level at the same time in the initial step S3, determining whether two or more input ports are at low level at the same time is to avoid a false touch or a false determination, and here, when the input ports are at low level at different time periods, the operation is to quickly respond to a key at different time periods; as shown in fig. 3, when IO port a1 dynamically outputs low level, if IO port a2, IO port A3 and IO port An are respectively in the first round, the second round and the nth round; the low level of different time quantum appears, this explains that there are two or more keys to take place in different time quantum, according to the algorithm formula of location of key position, realize its calculation through the above-mentioned calculation formula generally: l = ((K + N-2)% N) + 1; h = (((N-J)% N) + L)% N) + 1.
In this case, in step S4 described in this example, the column position and row position are calculated according to the output port J and input port K outputting low level in the current time slot, then the time slot corresponding to the next input port being low level is switched to, and the new input port K is read to calculate the column position and row position of the next key position, and this is repeated.
Assuming N =5, where J =1 and K =2, 3, N (N is the nth IO port), then:
the column number and row number of the key position when IO port a2 detects a low level are respectively: column number position L = ((K + N-2)% N) +1= ((2+5-2)%5) +1= 1; row number position H = (((N-J)% N) + L)% N) +1= ((((5-1)%5) +1)%5) +1= 1; the column number position refers to the serial number of the column, and the row number position refers to the serial number of the row, i.e., the key position when IO port a2 detects a low level is column 1, row 1.
The column number and row number of the key position when IO port a3 detects a low level are respectively: column number position L = ((K + N-2)% N) +1= ((3+5-2)%5) +1= 2; the row number position H = (((N-J)% N) + L)% N) +1= ((((5-1)%5) +2)%5) +1=2, i.e., the key position at which IO port a3 detects a low level is column 2, row 2.
The number of columns and rows of key positions when the IO port An detects a low level are respectively: column number position L = ((K + N-2)% N) +1= ((N +3)%5) + 1; the row number position H = (((N-J)% N) + L)% N) +1= ((((5-N)%5) + (((N +3)%5) +1))%5) + 1.
Similarly, if the dynamic output of the IO port a2 appears at the IO port A3 and the IO port An at low levels in different time periods, which indicates that two keys are generated in different time periods, assuming that N =7, J =2, K =3, N (N is the nth IO port), according to the key position scanning calculation method in step S4, there are:
the column number and row number of the key position when IO port a3 detects a low level are respectively: column number position L = ((K + N-2)% N) +1= ((3+7-2)%7) +1= 2; the row number position H = (((N-J)% N) + L)% N) +1= (((((7-2)% 7) +2)%7) +1=1, i.e., the key position at which IO port a3 detects a low level is column 2, row 1.
The rows and columns of the key positions when the IO port An detects a low level are respectively: column number position L = ((K + N-2)% N) +1= ((N +5)%7) + 1; the row number position H = (((N-J)% N) + L)% N) +1= ((((7-N)%7) + (((N +5)%7) +1))%7) + 1.
Therefore, it is obvious that the embodiment can quickly respond to the key information of the time-sharing dynamic transformation keyboard through the independently designed time-sharing dynamic transformation key scanning method, effectively avoid the problem of wrong judgment of the key position on the basis of meeting the one-line connection requirement and quick response, reduce the production cost, improve the accuracy and the practicability of key position scanning, and well meet the requirement of industrial products on current large-level information data.
Preferably, in the present embodiment, in the step S2, the high-low level state of the input port is sequentially scanned, and a dynamically scanned time chart of the input port is recorded, when the input port is at the low level, the serial number of the input port is identified, that is, the numerical value of the input port K is recorded, so that when performing subsequent jumping and calculation, the identification can be quickly implemented, which is beneficial to further increasing the response speed.
The embodiment also provides a time-sharing dynamic transformation key scanning system, which comprises a time-sharing dynamic transformation keyboard and the time-sharing dynamic transformation key scanning method, wherein the time-sharing dynamic transformation keyboard is a linear time-sharing dynamic transformation keyboard, preferably as shown in fig. 2, in practical application, the time-sharing dynamic transformation keyboard can be adjusted according to practical requirements, a power supply VCC is respectively connected to IO ports in one-to-one correspondence through pull-up resistors, a plurality of IO ports are connected in parallel, and the time-sharing dynamic transformation keyboard adopts the time-sharing dynamic transformation key scanning method to realize key scanning.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. A time-sharing dynamic transformation key position scanning method is characterized by comprising the following steps:
step S1, configuring one IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports;
step S2, scanning the high and low level states of the input ports in sequence, judging whether the input ports are low level in real time, if yes, jumping to step S3, if not, returning to the step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and using other IO ports as the input ports;
step S3, judging whether two or more input ports are low level at the same time, if not, jumping to step S4, if yes, returning to step S1, configuring the next IO port in the time-sharing dynamic transformation keyboard to output low level, and taking other IO ports as input ports;
and step S4, reading the output port J and the input port K outputting the low level, and calculating the column position and the row position of the corresponding key through the output port J and the input port K, where J is the output port number of the current output low level, and K is the input port number of the low level detected by the output port J when outputting the low level.
2. The time-sharing dynamic shift key position scanning method according to claim 1, wherein said step S4 calculates the number of columns and positions L of the key by the formula L = ((K + N-2)% N) +1, where N is the total number of IO ports and% is modulo operator.
3. The time-sharing dynamic shift key position scanning method according to claim 2, wherein said step S4 calculates the row number position H of the key by the formula H = (((N-J)% N) + L)% N) + 1.
4. The time-sharing dynamic transformation key scanning method according to any one of claims 1 to 3, wherein when the total number of IO ports is greater than or equal to 4, said step S1 includes the following sub-steps:
s101, configuring IO ports A1 to An as input ports, configuring IO port A1 to output low level independently, and then jumping to step S2 to scan the IO ports A2 to the IO ports An in sequence, wherein n is the serial number of the last IO port;
step S102, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure the IO ports A1 to the IO ports An as the input ports, configuring the IO ports A2 independently to output low level, and then jumping to step S2 to scan the IO ports A1, the IO ports A3 to the IO ports An in sequence;
step S103, when no input port is in low level or a plurality of input ports are in low level at the same time, returning to configure IO ports A1 to An to be input ports, independently configuring IO port A3 to output low level, and then jumping to step S2 to scan IO port A1, IO port A2, IO port A4 to the IO port An in sequence;
and step S104, returning to repeat the steps, circulating until the IO port An is configured independently to output low level, and then jumping to step S2 to scan the IO port A1 to the IO port An-1 in sequence.
5. The time-sharing dynamic shift key position scanning method according to claim 4, wherein in said step S3, when the input ports respectively appearing at different time periods are low level, it jumps to said step S4 to perform the calculation of the column number positions and the row number positions.
6. The time-sharing dynamic shift key scanning method according to claim 5, wherein in said step S4, the calculation of the column position and row position is performed according to the output port J and input port K outputting low level in the current time period, then switching to the time period corresponding to the next input port being low level, and reading the new input port K to perform the calculation of the column position and row position of the next key, and repeating this.
7. The time-sharing dynamic shift key scanning method according to claim 5, wherein said n is 5.
8. The time-sharing dynamic shift key scanning method according to any one of claims 1 to 3, wherein in said step S2, the high and low level states of the input port are scanned in sequence, and the time chart of the dynamic scanning thereof is recorded, and when the input port is at low level, the serial number of the input port is identified.
9. A time-sharing dynamic transformation key scanning system, characterized in that, it includes a time-sharing dynamic transformation keyboard and the time-sharing dynamic transformation key scanning method as claimed in any one of claims 1 to 8, wherein, the time-sharing dynamic transformation keyboard is a one-line time-sharing dynamic transformation keyboard, the power VCC is connected to the IO ports corresponding to one-to-one through the pull-up resistor, the plurality of IO ports are connected in parallel, the time-sharing dynamic transformation keyboard adopts the time-sharing dynamic transformation key scanning method to realize key scanning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000262.XA CN112073070B (en) | 2020-09-22 | 2020-09-22 | Time-sharing dynamic transformation key position scanning method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000262.XA CN112073070B (en) | 2020-09-22 | 2020-09-22 | Time-sharing dynamic transformation key position scanning method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112073070A true CN112073070A (en) | 2020-12-11 |
| CN112073070B CN112073070B (en) | 2024-04-05 |
Family
ID=73682340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011000262.XA Active CN112073070B (en) | 2020-09-22 | 2020-09-22 | Time-sharing dynamic transformation key position scanning method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112073070B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10255590A (en) * | 1997-03-07 | 1998-09-25 | Kokusai Electric Co Ltd | Switch system and its data fetching method |
| CN101162905A (en) * | 2006-10-13 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Keyboard scanning circuit and method |
| CN101860369A (en) * | 2010-06-24 | 2010-10-13 | 鸿富锦精密工业（深圳）有限公司 | Matrix keyboard and scanning method thereof |
| CN101924563A (en) * | 2009-06-16 | 2010-12-22 | 厦门敏讯信息技术股份有限公司 | Keyboard scanning method |
| CN102111159A (en) * | 2010-12-27 | 2011-06-29 | 青岛文达通科技发展有限公司 | Keyboard scanning circuit and scanning method thereof |
| CN202906878U (en) * | 2012-11-29 | 2013-04-24 | 无锡华润矽科微电子有限公司 | Key determination circuit structure for tower-type keyboard |
| CN203632650U (en) * | 2013-12-30 | 2014-06-04 | 广东瑞德智能科技股份有限公司 | Matrix key scanning circuit |
-
2020
- 2020-09-22 CN CN202011000262.XA patent/CN112073070B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10255590A (en) * | 1997-03-07 | 1998-09-25 | Kokusai Electric Co Ltd | Switch system and its data fetching method |
| CN101162905A (en) * | 2006-10-13 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Keyboard scanning circuit and method |
| CN101924563A (en) * | 2009-06-16 | 2010-12-22 | 厦门敏讯信息技术股份有限公司 | Keyboard scanning method |
| CN101860369A (en) * | 2010-06-24 | 2010-10-13 | 鸿富锦精密工业（深圳）有限公司 | Matrix keyboard and scanning method thereof |
| CN102111159A (en) * | 2010-12-27 | 2011-06-29 | 青岛文达通科技发展有限公司 | Keyboard scanning circuit and scanning method thereof |
| CN202906878U (en) * | 2012-11-29 | 2013-04-24 | 无锡华润矽科微电子有限公司 | Key determination circuit structure for tower-type keyboard |
| CN203632650U (en) * | 2013-12-30 | 2014-06-04 | 广东瑞德智能科技股份有限公司 | Matrix key scanning circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112073070B (en) | 2024-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110316725A1 (en) | Scanning circuit and method for keyboard | |
| US7469393B2 (en) | Method and device for supporting verification, and computer product | |
| CN212303083U (en) | Defect repair circuit and memory | |
| JPS5864844A (en) | Synchronism detecting system | |
| US20110083042A1 (en) | Touch Control Device and Controller, Testing Method and System of the Same | |
| US20120256853A1 (en) | Detection method for touch input device | |
| CN112073070A (en) | Time-sharing dynamic transformation key position scanning method and system | |
| US6907385B2 (en) | Memory defect redress analysis treating method, and memory testing apparatus performing the method | |
| US11720183B2 (en) | Method for operating an active input element and corresponding input element, input arrangement and computer program product | |
| JP2006039621A (en) | Method and system for preparing timing constraint library | |
| CN104134464A (en) | System and method for testing address line | |
| CN108490338B (en) | Test apparatus, test method, computer apparatus, and computer-readable storage medium | |
| JP4622432B2 (en) | Touch panel control unit | |
| CN110071712B (en) | Novel dynamic transformation matrix key position scanning circuit and key position positioning method thereof | |
| US8749407B2 (en) | Method and system for detecting hidden ghost keys on keyboard matrix | |
| US7038965B2 (en) | Pointer generator for stack | |
| KR19990067519A (en) | Memory test circuit | |
| CN212206335U (en) | Matrix keyboard simulator of digital electronic scale | |
| CN102655027B (en) | Test apparatus | |
| US10303263B2 (en) | Auto swap order of finding key to generate scan codes | |
| CN109917963B (en) | Touch screen, driving method thereof, storage medium and processor | |
| US8780058B2 (en) | Information input device, image forming device, input control method, and computer-readable recording medium | |
| CN101673578A (en) | Semiconductor memory device and word line driving method thereof | |
| US8564460B2 (en) | Keyboard device and method of identifying a key operation | |
| CN115712052A (en) | Chip testing method and device, computer and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |