CN102945596B - Signal reception method of remote controller - Google Patents
Signal reception method of remote controller Download PDFInfo
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- CN102945596B CN102945596B CN201210426353.9A CN201210426353A CN102945596B CN 102945596 B CN102945596 B CN 102945596B CN 201210426353 A CN201210426353 A CN 201210426353A CN 102945596 B CN102945596 B CN 102945596B
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Abstract
The invention relates to a technology of remote control. The invention, solving the problem of low reliability of signal reception of existing air conditioner remote controller, provides a signal reception method of a remote controller, characterized in that: by applying a timer called timer 0 and determining the received pulse width time, the signal reception of the remote controller can effectively process and isolate interference signals. According to the invention, the reception efficiency and reliability of the remote controller signals are raised, and the method disclosed herein is suitable for the reception of the remote controller signals.
Description
Technical field
The present invention relates to telecontrol engineering, particularly the technology of air-conditioning remote control Signal reception.
Background technology
At present, air conditioner generally receives remote controller signal and push button signalling by indoor set processor, by decoding, control indoor horizontal wind direction, vertically-supplying air to, indoor electric heating, the operation of indoor fan motor and the sampling of indoor temperature, indoor set processor also controls the display of LED light or digitron display screen, simultaneously, indoor set processor passes through UART asynchronous communication with off-premises station processor carrying out shake communication, telepilot or key controlling command and controling parameters etc. are delivered to off-premises station, the operational factor of off-premises station is delivered to indoor set simultaneously, further indoor set and off-premises station controlled by indoor set by regulating and show, off-premises station processor receives the order from indoor set by UART asynchronous communication, to outdoor compressor, four-way valve, outdoor fans etc. control, and the sampling that control is carried out each temperature sensor outdoor.At present, the collection of air-conditioning remote control input signal receives, the time that the mode ranging pulse width that general employing external interrupt (some in external interrupt INT0 ~ INTn) and timer combine is corresponding receives remote controller signal, when there being remote control input signal, rising edge or the negative edge appearance of signal is just had at processor external interrupt interface, now by the timing of timer, just can obtain the time interval between twice input signal negative edge or twice input signal rising edge, obtain pulse width time, again the signal that pulse width time is launched with telepilot is compared, obtain digital " 0 " and the numeral " 1 " of input remote controller signal, finally obtain the array of remote control input signal, telepilot control signal is obtained again by decoding.But due to the circumstance complication that air conditioner runs, undesired signal frequently occurs, and temperature, humidity and other electromagnetic interference (EMI) all can affect the performance of electron device, particularly transducer air conditioning operationally, because outdoor IPM to control the operation of compressor by the frequent shutoff of six road upper and lower bridge arm switching devices and conducting, certainly will to cause a large amount of undesired signals, if effectively do not processed undesired signal, the reception of remote controller signal certainly will be disturbed, the serious problems such as malfunctioning particularly causing remote controller signal to receive.Air-conditioning 0.1 degree of accurate temperature controlling remote controller signal, comprise the preamble code that the pulse width time be simultaneously made up of high level and low level is approximately 13 milliseconds, the combination of the numeral " 1 " of the digital " 0 " of 1 millisecond and 2 milliseconds is formed, the whole frame remote controller signal duration is long, signal message amount is large especially, the fraction part of the existing design temperature of information that every frame remote controller signal comprises and integral part, also has the air quantity of blower fan, pattern and/or airdoor control information, and the information such as timed power on/off time, specially require and the reception of remote controller signal is ensured efficiently with reliable.But in current air conditioner signal reception method of remote controller, all the integrity problem that remote controller signal receives is not processed, cause current air conditioner remote controller signal reception reliability not high.
Summary of the invention
The object of the invention is to overcome the not high shortcoming of current air conditioner remote controller signal reception reliability, a kind of remote control signal receiver method is provided.
The present invention solves its technical matters, and the technical scheme of employing is, remote control signal receiver method, is characterized in that, comprises the following steps:
Step 1, default some external interrupt INTx interrupt at negative edge or rising edge trigger external INTx, and x is natural number;
The exterior I NTx that step 2, wait remote control input signal cause interrupts occurring;
If step 3 exterior I NTx interrupts occurring, processor performs interrupt service routine, judges whether the value of the first register step is 0, if not 0 enters step 5, if 0 enters step 4;
Step 4, timer timer0 timing is set, starts timer timer0 and start counting, the value of the first register step is set to 1 simultaneously, exits interrupt service routine, get back to step 2;
The nonce counter time value of step 5, reading timer timer0 puts into the second register, calculate the time that timer timer0 experienced to nonce counter time value timing from last time, show that the pulse width time between twice exterior I NTx interruption puts into the 3rd register T0, again set the timing of timer timer0, restart timer timer0 and start counting;
Whether step 6, the value judging the first register step are 1, if 1 enters step 7, if not 1 enters step 8;
Step 7, judge whether input signal is effective preamble code, if then the value of the first register step is set to 2, exits interrupt service routine, gets back to step 2 according to the value of the 3rd register T0, if not be then judged to be that undesired signal enters step 13;
Step 8, judge whether input signal is serial digital signal " 0 " or " 1 " according to the value of the 3rd register T0, if serial digital signal " 0 " or " 1 " then shifting processing are be stored into reception buffer zone after the byte byte of 8bit, and enter step 9, if not serial digital signal " 0 " or " 1 " are then judged to be that undesired signal enters step 13;
Step 9, judge whether that all bytes finish receiving all, if then enter step 10, if not then exit interrupt service routine, get back to step 2;
Whether the School Affairs of the data that step 10, judgement receive is correct, if then enter step 11, if not be then judged to be that undesired signal enters step 13;
Step 11, setting receive remote controller signal mark, wait for decoding process, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stops timer timer0, gets back to step 2 and waits for that next time receives;
In step 12, whole timer timer0 operational process, if timer timer0 count value exceedes timing, then what think reception is that undesired signal directly enters step 13;
The information data that step 13, deletion have received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to step 2 and wait for that next time receives.
Further, described timing is 15 milliseconds.
Concrete, in step 7, the described value according to the 3rd register T0 judges that whether input signal is the method for effective preamble code and is: when the value of the 3rd register T0 is in the error range that preamble code standard time width is certain, is judged to be effective preamble code, otherwise is judged to be invalid preamble code.
Further, described preamble code standard time width is designated as T1, then the error range that preamble code standard time width is certain is [T1 × (1-n0%), T1 × (1+n0%)], and wherein, n0 is positive number.
Concrete, the span of described n0 is 10 to 30.
Further, in step 8, the described value according to the 3rd register T0 judges that whether input signal is the method for serial digital signal " 0 " or " 1 " and is: when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 0 " is certain, be judged to be serial digital signal " 0 ", when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 1 " is certain, be judged to be serial digital signal " 1 ", other situations are judged to be invalid preamble code.
Concrete, the standard time width of described serial digital signal " 0 " is designated as T2, then the error range that the standard time width of serial digital signal " 0 " is certain is [T2 × (1-n1%), T2 × (1+n1%)], wherein, n1 is positive number.
Further, the span of described n1 is 10 to 30.
Concrete, the standard time width of described serial digital signal " 1 " is designated as T3, then the error range that the standard time width of serial digital signal " 1 " is certain is [T3 × (1-n2%), T3 × (1+n2%)], wherein, n2 is positive number.
Further, the span of described n2 is 10 to 30.
The invention has the beneficial effects as follows, by above-mentioned remote control signal receiver method, by the pulse width time that application and the judgement of timer timer0 receive, can not only reliable reception air-conditioning 0.1 degree of accurate temperature controlling remote controller signal, and can also effectively process undesired signal and isolate.
Embodiment
Below in conjunction with embodiment, describe technical scheme of the present invention in detail.
Remote control signal receiver method of the present invention is: first preset some external interrupt INTx and interrupt at negative edge or rising edge trigger external INTx, x is that natural number (namely refers to the external interrupt selecting some external interrupt INTx to interrupt as trigger external, the value of x is relevant with the quantity that this equipment peripheral interrupts), then wait for that the exterior I NTx that remote control input signal causes interrupts occurring, if exterior I NTx interrupts occurring, processor performs interrupt service routine, whether the value judging the first register step is 0, if 0 arranges timer timer0 timing, start timer timer0 and start counting, the value of the first register step is set to 1 simultaneously, exit interrupt service routine, get back to and wait for that the exterior I NTx that remote control input signal causes interrupts that step occurs, if not the nonce counter time value of 0 reading timer timer0 puts into the second register, calculate the time that timer timer0 experienced to nonce counter time value timing from last time, show that the pulse width time between twice exterior I NTx interruption puts into the 3rd register T0, again set the timing of timer timer0, restart timer timer0 and start counting, whether the value then judging the first register step is 1, if according to the value of the 3rd register T0,1 judges whether input signal is effective preamble code, if then the value of the first register step is set to 2, exit interrupt service routine, get back to and wait for that the exterior I NTx that remote control input signal causes interrupts that step occurs, if not be then judged to be that undesired signal deletes the information data received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to and wait for that step of exterior I NTx interruption generation that remote control input signal causes waits for that next time receives, if not according to the value of the 3rd register T0,1 judges whether input signal is serial digital signal " 0 " or " 1 ", if not serial digital signal " 0 " or " 1 " are then judged to be that undesired signal deletes the information data received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to and wait for that step of exterior I NTx interruption generation that remote control input signal causes waits for that next time receives, if serial digital signal " 0 " or " 1 " then shifting processing are be stored into reception buffer zone after the byte byte of 8bit, and judge whether that all bytes finish receiving all, if not then exit interrupt service routine, get back to and wait for that step of exterior I NTx interruption generation that remote control input signal causes waits for that next time receives, if then judge that whether the School Affairs of the data received is correct, if not be then judged to be that undesired signal deletes the information data received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to and wait for that step of exterior I NTx interruption generation that remote control input signal causes waits for that next time receives, if then arrange and receive remote controller signal mark, wait for decoding process, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to step 2 and wait for that next time receives, in addition, in whole timer timer0 operational process, if timer timer0 count value exceedes timing, what then think reception is that undesired signal directly deletes the information data received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to and wait for that step of exterior I NTx interruption generation that remote control input signal causes waits for that next time receives.
Embodiment
In the remote control signal receiver method of this example, the preamble code pulse width time due to air-conditioning 0.1 degree of accurate temperature controlling remote controller signal is about 13 milliseconds, and therefore timer timer0 timing can adopt 15 milliseconds, and concrete method is:
Step 1, default some external interrupt INTx interrupt at negative edge or rising edge trigger external INTx, and x is natural number (namely referring to the external interrupt selecting some external interrupt INTx to interrupt as trigger external);
The exterior I NTx that step 2, wait remote control input signal cause interrupts occurring;
If step 3 exterior I NTx interrupts occurring, processor performs interrupt service routine, judges whether the value of the first register step is 0, if not 0 enters step 5, if 0 enters step 4;
Step 4, to arrange timer timer0 timing be 15 milliseconds, starts timer timer0 and start counting, the value of the first register step is set to 1 simultaneously, exits interrupt service routine, get back to step 2;
The nonce counter time value of step 5, reading timer timer0 puts into the second register, calculate the time that timer timer0 experienced to nonce counter time value timing from last time, show that the pulse width time between twice exterior I NTx interruption puts into the 3rd register T0, the timing again setting timer timer0 is 15 milliseconds, restarts timer timer0 and starts counting;
Whether step 6, the value judging the first register step are 1, if 1 enters step 7, if not 1 enters step 8;
Step 7, judge whether input signal is effective preamble code, if then the value of the first register step is set to 2, exits interrupt service routine, gets back to step 2 according to the value of the 3rd register T0, if not be then judged to be that undesired signal enters step 13;
Here, judge that whether input signal is the method for effective preamble code and is according to the value of the 3rd register T0: when the value of the 3rd register T0 is in the error range that preamble code standard time width is certain, be judged to be effective preamble code, otherwise be judged to be invalid preamble code, if preamble code standard time width is designated as T1, the error range that then preamble code standard time width is certain is [T1 × (1-n0%), T1 × (1+n0%)], wherein, n0 is positive number, should choose according to the condition of code of remote control signal pulse width, general span is 10 to 30.
Step 8, judge whether input signal is serial digital signal " 0 " or " 1 " according to the value of the 3rd register T0, if serial digital signal " 0 " or " 1 " then shifting processing are be stored into reception buffer zone after the byte byte of 8bit, and enter step 9, if not serial digital signal " 0 " or " 1 " are then judged to be that undesired signal enters step 13;
Here, judge that whether input signal is the method for serial digital signal " 0 " or " 1 " and is according to the value of the 3rd register T0: when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 0 " is certain, be judged to be serial digital signal " 0 ", when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 1 " is certain, be judged to be serial digital signal " 1 ", other situations are judged to be invalid preamble code, if the standard time width of serial digital signal " 0 " is designated as T2, the error range that then the standard time width of serial digital signal " 0 " is certain is [T2 × (1-n1%), T2 × (1+n1%)], the standard time width of serial digital signal " 1 " is designated as T3, the error range that then the standard time width of serial digital signal " 1 " is certain is [T3 × (1-n2%), T3 × (1+n2%)], wherein, n1 and n2 is positive number, should choose according to the condition of code of remote control signal pulse width, general span is all 10 to 30.
Step 9, judge whether that all bytes finish receiving all, if then enter step 10, if not then exit interrupt service routine, get back to step 2;
Whether the School Affairs of the data that step 10, judgement receive is correct, if then enter step 11, if not be then judged to be that undesired signal enters step 13;
Step 11, setting receive remote controller signal mark, wait for decoding process, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stops timer timer0, gets back to step 2 and waits for that next time receives;
In step 12, whole timer timer0 operational process, if timer timer0 count value exceedes timing 15 milliseconds, then what think reception is that undesired signal directly enters step 13;
The information data that step 13, deletion have received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to step 2 and wait for that next time receives.
Claims (5)
1. remote control signal receiver method, is characterized in that, comprises the following steps:
Step 1, default some external interrupt INTx interrupt at negative edge or rising edge trigger external INTx, and x is natural number;
The exterior I NTx that step 2, wait remote control input signal cause interrupts occurring;
If step 3 exterior I NTx interrupts occurring, processor performs interrupt service routine, judges whether the value of the first register step is 0, if not 0 enters step 5, if 0 enters step 4;
Step 4, timer timer0 timing is set, starts timer timer0 and start counting, the value of the first register step is set to 1 simultaneously, exits interrupt service routine, get back to step 2;
The nonce counter time value of step 5, reading timer timer0 puts into the second register, calculate the time that timer timer0 experienced to nonce counter time value timing from last time, show that the pulse width time between twice exterior I NTx interruption puts into the 3rd register T0, again set the timing of timer timer0, restart timer timer0 and start counting;
Whether step 6, the value judging the first register step are 1, if 1 enters step 7, if not 1 enters step 8;
Step 7, judge whether input signal is effective preamble code according to the value of the 3rd register T0, if then the value of the first register step is set to 2, exit interrupt service routine, get back to step 2, if not be then judged to be that undesired signal enters step 13, the described value according to the 3rd register T0 judges that whether input signal is the method for effective preamble code and is: when the value of the 3rd register T0 is in the error range that preamble code standard time width is certain, be judged to be effective preamble code, otherwise be judged to be invalid preamble code, described preamble code standard time width is designated as T1, the error range that then preamble code standard time width is certain is [T1 × (1-n0%), T1 × (1+n0%)], wherein, n0 is positive number,
Step 8, judge whether input signal is serial digital signal " 0 " or " 1 " according to the value of the 3rd register T0, if serial digital signal " 0 " or " 1 " then shifting processing are be stored into reception buffer zone after the byte byte of 8bit, and enter step 9, if not serial digital signal " 0 " or " 1 " are then judged to be that undesired signal enters step 13, the described value according to the 3rd register T0 judges that whether input signal is the method for serial digital signal " 0 " or " 1 " and is: when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 0 " is certain, be judged to be serial digital signal " 0 ", when the value of the 3rd register T0 is in the error range that the standard time width of serial digital signal " 1 " is certain, be judged to be serial digital signal " 1 ", other situations are judged to be invalid preamble code, the standard time width of described serial digital signal " 0 " is designated as T2, the error range that then the standard time width of serial digital signal " 0 " is certain is [T2 × (1-n1%), T2 × (1+n1%)], wherein, n1 is positive number, the standard time width of described serial digital signal " 1 " is designated as T3, the error range that then the standard time width of serial digital signal " 1 " is certain is [T3 × (1-n2%), T3 × (1+n2%)], wherein, n2 is positive number,
Step 9, judge whether that all bytes finish receiving all, if then enter step 10, if not then exit interrupt service routine, get back to step 2;
Whether the School Affairs of the data that step 10, judgement receive is correct, if then enter step 11, if not be then judged to be that undesired signal enters step 13;
Step 11, setting receive remote controller signal mark, wait for decoding process, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stops timer timer0, gets back to step 2 and waits for that next time receives;
In step 12, whole timer timer0 operational process, if timer timer0 count value exceedes timing, then what think reception is that undesired signal directly enters step 13;
The information data that step 13, deletion have received, this remote controller signal finishes receiving, the value of the first register step is set to 0, initialization second register and the 3rd register T0, initialization external interrupt INTx and timer timer0, stop timer timer0, get back to step 2 and wait for that next time receives.
2. remote control signal receiver method according to claim 1, it is characterized in that, described timing is 15 milliseconds.
3. remote control signal receiver method according to claim 1 or 2, is characterized in that, the span of described n0 is 10 to 30.
4. remote control signal receiver method according to claim 1 or 2, is characterized in that, the span of described n1 is 10 to 30.
5. remote control signal receiver method according to claim 1 or 2, is characterized in that, the span of described n2 is 10 to 30.
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| CN103729998A (en) * | 2013-12-09 | 2014-04-16 | 乐视致新电子科技（天津）有限公司 | Decoding method and device |
| CN104299402B (en) * | 2014-08-15 | 2017-05-24 | 恬家（上海）信息科技有限公司 | Infrared learning method using AD mode |
| CN106448129A (en) * | 2016-10-26 | 2017-02-22 | 青岛海信电器股份有限公司 | Method and device for removing interference pulse in infrared remote control data |
| CN111768609B (en) * | 2020-06-29 | 2021-07-23 | 珠海格力电器股份有限公司 | Infrared signal processing method and device |
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