CN101738952A - Method for realizing keys of single chip microcomputer - Google Patents
Method for realizing keys of single chip microcomputer Download PDFInfo
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- CN101738952A CN101738952A CN200910200413A CN200910200413A CN101738952A CN 101738952 A CN101738952 A CN 101738952A CN 200910200413 A CN200910200413 A CN 200910200413A CN 200910200413 A CN200910200413 A CN 200910200413A CN 101738952 A CN101738952 A CN 101738952A
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- button
- key
- keys
- judgement
- chip microcomputer
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Abstract
The invention relates to a method for realizing keys of a single chip microcomputer, comprising the following steps of: integrating keys, i.e. integrating I/O ports of more keys into a register; deciding a new key when a key is judged to be pressed according to the keying condition; and using the former key as an old key relative to a new key to carry out old key lookup shunt procedure which comprises the following three conditions: judgment of no keying, judgment of common, continuous key and long-pressing repeatedly-used keying and judgment of more ineffective keying. The invention realizes the method for processing keys of a single chip microcomputer, which can avoid system halting and ineffective keying.
Description
Technical field
The invention belongs to the single-chip microcomputer applied technical field, relate in particular to a kind of implementation method of keys of single chip microcomputer.
Background technology
In the single chip circuit design of equipment such as instrument and meter, because the resource of single-chip microcomputer is very limited, design for dedicated button is to carry out the simplest design according to the needs that use on the one hand, owing to can not use special-purpose button treatment circuit, all can directly use the system resource of single-chip microcomputer itself to award the button processing usually on the one hand.Wherein adopting system scan is mode wherein commonly used.And this mode is often handled owing to the simplification on designing, because user's problem can cause the situation of system in case of system halt, for example the easy appearance under the situation of quick button continuously of equipment or machine is crashed, the button invalid situation.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can avoid crashing and the invalid keys of single chip microcomputer implementation method of button.
Technical scheme of the present invention is that a kind of keys of single chip microcomputer implementation method is characterized in that, comprising:
The I/O mouth of a plurality of buttons is incorporated into an integrating keys step in the register;
When judgement has a button to press, be and confirm new key, confirm new key step according to the button situation simultaneously;
With respect to new key last time button as old key, according to the old key branch program step of tabling look-up;
The described old key branch program of tabling look-up comprises the judgement that do not have button or common, interlock and long judgement or the invalid three kinds of situations of judgement of a plurality of button by multiplexing button.
For the judgement that does not have button,, then remove common key-press, long button, interlock button sign and sign and handle if judge that new key is arranged.
For common, interlock and long judgement, if judge there is not new key, if longly then withdraw from this step, if not common key-press and be that the interlock sign then enters the interlock handling procedure by button by multiplexing button.
The present invention has realized a kind of problem of avoiding misoperation to crash for the button processing of the single-chip microcomputer of resource-constrained.
Description of drawings
Fig. 1 is a processing flow chart total in one embodiment of the invention
Fig. 2 is for the processing flow chart of no button in one embodiment of the invention
Fig. 3 is for the processing flow chart of tabling look-up according to old key and shunting in one embodiment of the invention
Fig. 4 is the process flow diagram of handling for multikey in one embodiment of the invention
Embodiment
As Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the specific embodiment of the present invention is a kind of keys of single chip microcomputer implementation method, comprising: the I/O mouth of a plurality of buttons is incorporated into an integrating keys step in the register; When judgement has a button to press, be and confirm new key, confirm new key step according to the button situation simultaneously; With respect to new key last time button as old key, according to the old key branch program step of tabling look-up; The described old key branch program of tabling look-up comprises the judgement that do not have button or common, interlock and long judgement or the invalid three kinds of situations of judgement of a plurality of button by multiplexing button.For the judgement that does not have button,, then remove common key-press, long button, interlock button sign and sign and handle if judge that new key is arranged.For common, interlock and long judgement, if judge there is not new key, if longly then withdraw from this step, if not common key-press and be that the interlock sign then enters the interlock handling procedure by button by multiplexing button.
This button handling procedure is a modularized program, wherein its dependent variable in the variable discord program is related, and this modularized program comprised all patterns (button, common single keys presses, button, long) continuously of button by button thus fundamentally solved a lot of before this equipment, machine occur easily crashing in the absence of button continuously fast, the button invalid situation.Because modular design, the present invention can both be suitable for the button program of all devices.
Claims (3)
1. a keys of single chip microcomputer implementation method is characterized in that, comprising:
The I/O mouth of a plurality of buttons is incorporated into an integrating keys step in the register;
When judgement has a button to press, be and confirm new key, confirm new key step according to the button situation simultaneously;
With respect to new key last time button as old key, according to the old key branch program step of tabling look-up;
The described old key branch program of tabling look-up comprises the judgement that do not have button or common, interlock and long judgement or the invalid three kinds of situations of judgement of a plurality of button by multiplexing button.
2. keys of single chip microcomputer implementation method as claimed in claim 1 is characterized in that, for the judgement that does not have button, if judge that new key is arranged, then removes common key-press, long button, interlock button sign and sign and handles.
3. keys of single chip microcomputer implementation method as claimed in claim 1, it is characterized in that, not having new key if judge for common, interlock and long judgement by multiplexing button, if long then withdraw from this step, if not common key-press and be that the interlock sign then enters the interlock handling procedure by button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910200413A CN101738952A (en) | 2009-12-22 | 2009-12-22 | Method for realizing keys of single chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910200413A CN101738952A (en) | 2009-12-22 | 2009-12-22 | Method for realizing keys of single chip microcomputer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101738952A true CN101738952A (en) | 2010-06-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910200413A Pending CN101738952A (en) | 2009-12-22 | 2009-12-22 | Method for realizing keys of single chip microcomputer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101738952A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807130A (en) * | 2014-01-23 | 2015-07-29 | 广东美的制冷设备有限公司 | Virtual key method and system for self-defined parameters of air conditioner |
| CN109189242A (en) * | 2018-09-30 | 2019-01-11 | 天津市英贝特航天科技有限公司 | A kind of key board unit and working method based on PS2 agreement |
-
2009
- 2009-12-22 CN CN200910200413A patent/CN101738952A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807130A (en) * | 2014-01-23 | 2015-07-29 | 广东美的制冷设备有限公司 | Virtual key method and system for self-defined parameters of air conditioner |
| CN104807130B (en) * | 2014-01-23 | 2017-12-22 | 广东美的制冷设备有限公司 | The virtual key generation method and system of air conditioner custom parameter |
| CN109189242A (en) * | 2018-09-30 | 2019-01-11 | 天津市英贝特航天科技有限公司 | A kind of key board unit and working method based on PS2 agreement |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100616 |