CN101814233A - Decoding method of infrared remote control software - Google Patents
Decoding method of infrared remote control software Download PDFInfo
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- CN101814233A CN101814233A CN 201010141870 CN201010141870A CN101814233A CN 101814233 A CN101814233 A CN 101814233A CN 201010141870 CN201010141870 CN 201010141870 CN 201010141870 A CN201010141870 A CN 201010141870A CN 101814233 A CN101814233 A CN 101814233A
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Abstract
The invention provides a decoding method of infrared remote control software, comprising the following steps of: connecting the output end of an infrared remote control receiver to the interrupt input pin of an embedded microprocessor; starting a preset decoding program via the embedded microprocessor when the remote control encoding pulse signal received by the infrared remote control receiver passes through the interrupt input pin of the embedded microprocessor; testing the logic level and the pulse width of each pulse signal in each group of remote control encoding pulse signals, and decoding each group of remote control encoding pulse signals by means of a preset decoding rule to obtain the corresponding digital signals; searching characteristic values matched with the digital signals from the plurality of preset characteristic values to obtain the remote control command corresponding to the matched characteristic values; and executing the remote control command. The method adopts the software decoding technique, instead of the traditional hardware circuit decoding technique, thus simplifying the receiving circuit, facilitating the stable operation of a circuit, and reducing the decoding cost.
Description
Technical field
The present invention relates to a kind of infrared remote control decoding technology, specifically, relate to a kind of decoding method of infrared remote control software.
Background technology
Existing infrared remote coding and decoding technique are mostly realized by hardware, are promptly finished by the chip of a pair of Code And Decode, have so promptly increased the cost of hardware circuit, make hardware circuit complicated again, can reduce the stability of circuit performance on the contrary.
For this reason, people are seeking a kind of technical solution of more optimizing always.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of hardware circuit that can make to simplify the decoding method of infrared remote control software that can reduce the decoding cost again.
The technical solution adopted in the present invention is as follows: a kind of decoding method of infrared remote control software, and it may further comprise the steps:
Step 1, the output terminal of infrared remote control receiver is connected to the interruption input pin of embedded microprocessor, so that embedded microprocessor reads the remote control coding pulse signal that infrared remote control receiver receives by interrupting input pin;
During interruption input pin by embedded microprocessor of step 2, the remote control coding pulse signal that receives when infrared receiver of remote-control sytem, then embedded microprocessor starts default decoding program;
The logic level and the pulse width of each pulse signal in step 3, every group of remote control coding pulse signal of test, and utilize predefined decoding rule that every group of remote control coding pulse signal decoded, obtain corresponding infrared remote control digital signal;
Step 4, the eigenwert that is complementary from predefined a plurality of searching characteristic values and this infrared remote control digital signal, thus obtain and the pairing guidance command of this eigenwert that is complementary;
Step 5, execution and the pairing guidance command of this eigenwert that is complementary.
Based on above-mentioned, described decoding rule is: for two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 1 " expression;
For two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 1/3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 0 " expression.
The relative prior art of the present invention has outstanding substantive distinguishing features and marked improvement, specifically, this decoding method of infrared remote control software adopts the software decode technology to substitute the traditional hardware circuit decoding technique, receiving circuit is oversimplified, be beneficial to the stable operation of circuit, reduced the decoding cost again; In addition,, need not to change receiving circuit, only need to revise corresponding decoding software and get final product, reduced the cycle of exploitation once more, reduced cost of developing once more at different coding chips.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
A kind of decoding method of infrared remote control software may further comprise the steps:
Step 1, the output terminal of infrared remote control receiver is connected to the interruption input pin of embedded microprocessor, so that embedded microprocessor reads the remote control coding pulse signal that infrared remote control receiver receives by interrupting input pin.
Take the output terminal of infrared remote control receiver is connected to the method for attachment of the interruption input pin of embedded microprocessor, make software decode both can work in inquiry mode, also can work in interrupt mode.
In the present embodiment, the Infrared push button coding circuit in the telepilot adopts the PT2248 chip, carries out keyboard-coding by the PT2248 chip, produces coded pulse, and drives infrared transmitting tube output infrared remote control pulse signal; Infrared remote control receiver receives and finishes amplification, detection, the shaping to the infrared remote control pulse signal, finally demodulates the remote control coding pulse signal.
During interruption input pin by embedded microprocessor of step 2, the remote control coding pulse signal that receives when infrared receiver of remote-control sytem, then embedded microprocessor starts default decoding program;
Specifically, if telepilot does not send the infrared remote control pulse signal, then the output terminal of infrared remote control receiver keeps high level;
When infrared receiver of remote-control sytem receives the infrared remote control pulse signal, infrared remote control receiver gets off this signal demodulation and converts pulse train to, it is the remote control coding pulse signal, then, the remote control coding pulse signal is added to the interruption input pin of embedded microprocessor, at this moment, to low level, embedded microprocessor starts default decoding program to the interruption input pin by high level.
The logic level and the pulse width of each pulse signal in step 3, every group of remote control coding pulse signal of test, and utilize predefined decoding rule that every group of remote control coding pulse signal decoded, obtain corresponding infrared remote control digital signal;
Specifically, according to predefined interrupt mode, each pulse signal once interrupts, interrupt the logic level of input pin with software test, start the T timer simultaneously, measure the time value of this interruption input pin under high level and low level situation respectively, promptly start the pulse width that the T timer is measured each pulse signal, store, analyze then;
Based on aforementioned, described decoding rule is: for two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 1 " expression;
For two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 1/3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 0 " expression.
In the present embodiment, described infrared remote control digital signal comprises 12 binary codings, wherein, preceding 6 codings are user identification codes, it does not change with the difference of button, it is an identification mark that is provided with in order to represent the specific user, to distinguish the remote signal of different machines and different user emission, prevents maloperation; 6 codings in back are button identification codes, and its difference with button changes, promptly different keyboard-codings be with telepilot on different button corresponding one by one.
Step 4, the eigenwert that is complementary from predefined a plurality of searching characteristic values and this infrared remote control digital signal, thus obtain and the pairing guidance command of this eigenwert that is complementary;
Specifically, all corresponding guidance command of predefined each eigenwert when searching the eigenwert that is complementary with this infrared remote control digital signal, has promptly found and the pairing guidance command of this infrared remote control digital signal.
Step 5, execution and the pairing guidance command of this eigenwert that is complementary have promptly been carried out and the pairing guidance command of this infrared remote control digital signal.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (2)
1. a decoding method of infrared remote control software is characterized in that, this method may further comprise the steps:
Step 1, the output terminal of infrared remote control receiver is connected to the interruption input pin of embedded microprocessor, so that embedded microprocessor reads the remote control coding pulse signal that infrared remote control receiver receives by interrupting input pin;
During interruption input pin by embedded microprocessor of step 2, the remote control coding pulse signal that receives when infrared receiver of remote-control sytem, then embedded microprocessor starts default decoding program;
The logic level and the pulse width of each pulse signal in step 3, every group of remote control coding pulse signal of test, and utilize predefined decoding rule that every group of remote control coding pulse signal decoded, obtain corresponding infrared remote control digital signal;
Step 4, the eigenwert that is complementary from predefined a plurality of searching characteristic values and this infrared remote control digital signal, thus obtain and the pairing guidance command of this eigenwert that is complementary;
Step 5, execution and the pairing guidance command of this eigenwert that is complementary.
2. decoding method of infrared remote control software according to claim 1, it is characterized in that: described decoding rule is: for two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 1 " expression;
For two continuous pulse signals, if first pulse signal is that low level, second pulse signal are high level, and the pulse width of first pulse signal is 1/3 times of pulse width of second pulse signal, and two then that this is continuous pulse signals are with data bit " 0 " expression.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869382A (en) * | 2015-02-10 | 2016-08-17 | 东莞德可森电子科技有限公司 | Infrared remote control receiver |
| WO2016127809A1 (en) * | 2015-02-09 | 2016-08-18 | 张春雨 | Microprocessor-based infrared signal decoding method |
| CN108734944A (en) * | 2017-04-18 | 2018-11-02 | 陕西万方汽车零部件有限公司 | A kind of wireless remote control coding/decoding method and its device |
| CN109166301A (en) * | 2018-11-05 | 2019-01-08 | 福建师范大学 | A kind of infrared communication coding/decoding method of embedded system |
| CN110969832A (en) * | 2019-10-25 | 2020-04-07 | 智恒科技股份有限公司 | Infrared code decoding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016127809A1 (en) * | 2015-02-09 | 2016-08-18 | 张春雨 | Microprocessor-based infrared signal decoding method |
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| CN109166301A (en) * | 2018-11-05 | 2019-01-08 | 福建师范大学 | A kind of infrared communication coding/decoding method of embedded system |
| CN110969832A (en) * | 2019-10-25 | 2020-04-07 | 智恒科技股份有限公司 | Infrared code decoding method |
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