CN111240815B - Infrared signal modulation method and system based on linux - Google Patents
Infrared signal modulation method and system based on linux Download PDFInfo
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- CN111240815B CN111240815B CN202010003958.1A CN202010003958A CN111240815B CN 111240815 B CN111240815 B CN 111240815B CN 202010003958 A CN202010003958 A CN 202010003958A CN 111240815 B CN111240815 B CN 111240815B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000004590 computer program Methods 0.000 claims description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/48—Program initiating; Program switching, e.g. by interrupt
- G06F9/4806—Task transfer initiation or dispatching
- G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
- G06F9/4825—Interrupt from clock, e.g. time of day
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
- G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The application discloses a linux-based infrared signal modulation method, which comprises the following steps: s2: starting a linux high-precision timer; s4: calculating whether the total time expires; s6: and when the total time is not expired, repeating the step S4, and when the total time is expired, closing the high-precision timer. Compared with the prior art, the application has the following beneficial effects: the high-precision timer has high time precision (the precision is less than 40 microseconds), can meet the requirement of infrared signal modulation on time precision, and is easy to identify. The high-precision time setting is realized based on a hardware timer and interrupt inside the CPU, the CPU core is not required to participate in time calculation, the CPU is not required to be monopolized for a long time, and the problems of high CPU occupancy rate, long waiting time required by other tasks and high power consumption are solved.
Description
Technical Field
The application relates to the field of timing, in particular to a linux-based infrared signal modulation method.
Background
When the existing Linux-based embedded intelligent device develops the function based on infrared signal remote control, the existing LINUX frame is needed to realize the modulation of infrared signals through a timing switch infrared signal lamp. There are two types of infrared signal modulation based on LINUX: (1) time counting based on CPU busy waiting. However, a complete infrared signal has long total time, so that the debugging of the infrared signal requires long time to monopolize the CPU. Time counting is performed based on task sleep, but the accuracy is low (more than 4 MS), and the infrared signal accuracy is low.
Disclosure of Invention
The application mainly aims to provide a linux-based infrared signal modulation method, which comprises the following steps:
s2: starting a linux high-precision timer;
s4: calculating whether the total time expires;
s6: and when the total time is not expired, repeating the step S4, and when the total time is expired, closing the high-precision timer.
Optionally, the method further comprises: waiting for an infrared time code.
Optionally, the method further comprises: initializing the high precision timer.
Optionally, a high precision timer callback step is also included.
Optionally, the high precision timer callback step includes:
when the number of the current transmitted signals is smaller than the total number of signals, the infrared lamp is turned on or off;
and when the number of the currently transmitted signals is not less than the total number of signals, closing the high-precision timer and resetting the number of the currently transmitted signals.
The next timer expiration time is set and the number of transmitted signals is increased by 1.
According to an aspect of the present application, there is also provided a linux-based infrared signal modulation system, including:
the starting module is used for starting the linux high-precision timer;
a calculation module for calculating whether the total time expires;
and the closing module is used for repeating the steps when the total time is not expired, and closing the high-precision timer when the total time is expired.
The application also discloses a computer device comprising a memory, a processor and a computer program stored in the memory and executable by the processor, the processor implementing the method of any one of the above when executing the computer program.
The application also discloses a computer readable storage medium, a non-volatile readable storage medium having stored therein a computer program which, when executed by a processor, implements the method of any of the above.
The application also discloses a computer program product comprising computer readable code which, when executed by a computer device, causes the computer device to perform the method of any of the preceding claims.
Compared with the prior art, the application has the following beneficial effects:
the high-precision timer has high time precision (the precision is less than 40 microseconds), can meet the requirement of infrared signal modulation on time precision, and is easy to identify.
The high-precision time setting is realized based on a hardware timer and interrupt inside the CPU, the CPU core is not required to participate in time calculation, the CPU is not required to be monopolized for a long time, and the problems of high CPU occupancy rate, long waiting time required by other tasks and high power consumption are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
fig. 1-2 are schematic flow diagrams of a linux-based infrared signal modulation method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a computer device according to one embodiment of the application; and
FIG. 4 is a schematic diagram of a computer-readable storage medium according to one embodiment of the application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1-2, an embodiment of the present application provides a method for modulating infrared signals based on linux, including:
s2: starting a linux high-precision timer;
s4: calculating whether the total time expires;
s6: and when the total time is not expired, repeating the step S4, and when the total time is expired, closing the high-precision timer.
In an embodiment of the present application, the infrared signal modulation method based on linux further includes: waiting for an infrared time code.
In an embodiment of the present application, the infrared signal modulation method based on linux further includes: initializing the high precision timer.
In an embodiment of the present application, the infrared signal modulation method based on linux further includes: the method also comprises a high-precision timer callback step.
In an embodiment of the present application, the high precision timer callback step includes:
when the number of the current transmitted signals is smaller than the total number of signals, the infrared lamp is turned on or off;
and when the number of the currently transmitted signals is not less than the total number of signals, closing the high-precision timer and resetting the number of the currently transmitted signals.
The next timer expiration time is set and the number of transmitted signals is increased by 1.
The application also provides an infrared signal modulation system based on linux, which is characterized by comprising the following steps:
the starting module is used for starting the linux high-precision timer;
a calculation module for calculating whether the total time expires;
and the closing module is used for repeating the steps when the total time is not expired, and closing the high-precision timer when the total time is expired.
Compared with the prior art, the application has the following beneficial effects:
the high-precision timer has high time precision (the precision is less than 40 microseconds), can meet the requirement of infrared signal modulation on time precision, and is easy to identify.
The high-precision time setting is realized based on a hardware timer and interrupt inside the CPU, the CPU core is not required to participate in time calculation, the CPU is not required to be monopolized for a long time, and the problems of high CPU occupancy rate, long waiting time required by other tasks and high power consumption are solved.
Referring to fig. 3, the present application further provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, where the processor implements the method of any one of the above when executing the computer program.
Referring to fig. 4, a computer readable storage medium, a non-volatile readable storage medium, has stored therein a computer program which, when executed by a processor, implements the method of any of the above.
A computer program product comprising computer readable code which, when executed by a computer device, causes the computer device to perform the method of any of the preceding claims.
It will be apparent to those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. The infrared signal modulation method based on linux is characterized by comprising the following steps of:
s2: starting a linux high-precision timer;
s4: calculating whether the total time expires;
s6: repeating step S4 when the total time has not expired, and closing the high precision timer when the total time has expired;
high precision timer callback, comprising:
when the number of the current transmitted signals is smaller than the total number of signals, the infrared lamp is turned on or off;
when the number of the currently transmitted signals is not less than the total number of signals, closing the high-precision timer and resetting the number of the currently transmitted signals;
the next timer expiration time is set and the number of transmitted signals is increased by 1.
2. The linux-based infrared signal modulation method of claim 1, further comprising: waiting for an infrared time code.
3. The linux-based infrared signal modulation method of claim 2, further comprising: initializing the high precision timer.
4. A linux-based infrared signal modulation system, comprising:
the starting module is used for starting the linux high-precision timer;
a calculation module for calculating whether the total time expires;
a closing module, configured to repeat the step of calculating whether the total time expires when the total time does not expire, and close the high-precision timer when the total time expires;
high-precision timer callback module for
When the number of the current transmitted signals is smaller than the total number of signals, the infrared lamp is turned on or off;
when the number of the currently transmitted signals is not less than the total number of signals, closing the high-precision timer and resetting the number of the currently transmitted signals;
the next timer expiration time is set and the number of transmitted signals is increased by 1.
5. A computer device comprising a memory, a processor and a computer program stored in the memory and executable by the processor, wherein the processor implements the method of any of claims 1-3 when executing the computer program.
6. A computer readable storage medium, in which a computer program is stored which, when executed by a processor, implements the method according to any of claims 1-3.
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| CN202010003958.1A CN111240815B (en) | 2020-01-03 | 2020-01-03 | Infrared signal modulation method and system based on linux |
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| CN202010003958.1A CN111240815B (en) | 2020-01-03 | 2020-01-03 | Infrared signal modulation method and system based on linux |
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| CN111240815B true CN111240815B (en) | 2023-09-26 |
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| CN101609604A (en) * | 2008-06-17 | 2009-12-23 | 上海创见电子有限公司 | The control method of infrared learning |
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| CN111240815A (en) | 2020-06-05 |
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