CN115083137B - Infrared compensation processing system - Google Patents
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- CN115083137B CN115083137B CN202210855136.5A CN202210855136A CN115083137B CN 115083137 B CN115083137 B CN 115083137B CN 202210855136 A CN202210855136 A CN 202210855136A CN 115083137 B CN115083137 B CN 115083137B
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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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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G3/00—Producing timing pulses
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G5/00—Setting, i.e. correcting or changing, the time-indication
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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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the application provides an infrared compensation processing system, which comprises a real-time clock, an event trigger, a system clock source, an enhancement timer and an infrared emission unit, wherein the real-time clock, the event trigger and the enhancement timer are used for periodically triggering the event trigger to send a pulse signal to the enhancement timer, the enhancement timer captures a pulse count value corresponding to the pulse signal, and the pulse count value and the clock standard count value obtained by the system clock source are used for determining an infrared carrier compensation value, so that an infrared carrier signal is accurately emitted, and the problem that an infrared control device cannot be realized due to the fact that an infrared emission carrier of the infrared emission clock source is deviated in the related technology is solved.
Description
Technical Field
The application relates to the technical field of clock calibration, in particular to an infrared compensation processing system.
Background
MCU (micro controller) is widely applied, and comprises a plurality of fields of household appliances, digital codes, industry, medical electronics and the like, infrared remote control is widely used in products in the fields, and the accuracy is low because the internal high-speed clock source of MCU is limited by the technical level and the environmental factors (temperature and voltage) and the external parasitic capacitance in PCB (printed board). As an infrared emission clock source, the infrared emission carrier wave is deviated, and the problem that equipment cannot be controlled by infrared occurs.
Disclosure of Invention
In view of the foregoing, the present application provides an infrared-compensated processing system to solve at least the problems of the related art.
The embodiment of the application provides an infrared compensation processing system, which comprises:
the real-time clock is used for periodically outputting a trigger signal to the event trigger;
the event trigger is used for receiving the trigger signal, generating a pulse signal and sending the pulse signal to the enhancement timer;
the system clock source is used for generating a clock standard count value and sending the clock standard count value to the enhancement timer;
the enhancement timer is used for determining a pulse count value corresponding to the pulse signal and determining an infrared carrier compensation value according to the pulse count value and the clock standard count value; and
and the infrared emission unit is used for receiving the infrared carrier compensation value and emitting an infrared carrier signal according to the infrared carrier compensation value.
In some embodiments, the infrared compensated processing system comprises: a calibration module;
the calibration module is used for correcting the system clock source according to the pulse count value and the clock standard count value.
In some embodiments, the boost timer comprises: a pulse counting module;
the pulse counting module is used for acquiring the count value of the pulse signal generating the falling edge, and determining the pulse count value according to the difference value between the first count value acquired by the pulse counting module at the current falling edge and the second count value acquired by the pulse counting module at the next falling edge.
In some embodiments, the calibration module comprises: a first calibration module;
the first calibration module is used for downwards adjusting the system clock source and adjusting the falling edge generated by the pulse signal into a first falling edge under the condition that the pulse count value is smaller than the clock standard count value.
In some embodiments, the calibration module comprises: a second calibration module;
the second calibration module is configured to adjust the system clock source upwards and adjust a falling edge generated by the pulse signal to be a second falling edge when the pulse count value is greater than the clock standard count value.
In some embodiments, the calibration module further comprises: a third calibration module;
the third calibration module is used for calibrating the system clock source according to preset times, and acquiring the average value of the pulse count values acquired corresponding to the calibration times under the condition that the preset times are met.
In some embodiments, the infrared compensated processing system further comprises: an infrared carrier compensation module;
the infrared carrier compensation module is used for calculating an infrared carrier compensation value based on the average value of the clock standard count value and the pulse count value.
In some embodiments, the infrared carrier compensation value comprises a first infrared carrier compensation value, the infrared compensated processing system further comprising: the first infrared emission adjustment module;
the first infrared emission adjustment module is used for determining a first infrared carrier compensation value based on the condition that the clock standard count value is larger than the average value of the pulse count value, and multiplying an adjustment coefficient after subtracting the average value of the pulse count value from the clock standard count value.
In some embodiments, the infrared carrier compensation value comprises a second infrared carrier compensation value, the infrared compensated processing system further comprising: the second infrared emission adjustment module;
the second infrared emission adjustment module is used for determining a second infrared carrier compensation value based on the fact that the average value of the pulse count value subtracts the clock standard count value and then multiplies the clock standard count value by an adjustment coefficient under the condition that the clock standard count value is smaller than the average value of the pulse count value.
In some embodiments, the real time clock uses a first calculation formula t= ((division factor+1) × (tick+1))/real time clock number to determine the period value of the pulse signal that generated the falling edge.
According to the processing system for infrared compensation, provided by the embodiment of the application, the real-time clock, the event trigger and the enhanced timer are used, the event trigger is periodically triggered on the real-time clock to send the pulse signal to the enhanced timer, the pulse count value corresponding to the pulse signal is captured by the enhanced timer, the pulse count value and the clock standard count value obtained by the system clock source are used for determining the infrared carrier compensation value, and further the infrared carrier signal is accurately transmitted, so that the problem that the infrared control equipment cannot be realized due to the deviation phenomenon of the infrared emission carrier generated by the infrared emission clock source in the related technology is solved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
The application will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
FIG. 1 illustrates a schematic diagram of an infrared compensated processing system in accordance with one embodiment of the present application;
FIG. 2 is a flow chart of an IR compensation process in an IR compensation processing system according to one embodiment of the application;
FIG. 3 is a flow chart illustrating the mean value calculation of the calculation values in an infrared compensated processing system according to an embodiment of the present application.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
In the related art, since the internal high-speed clock source of the MCU is limited by the process level and the environmental factors (temperature, voltage), and the external parasitic capacitance in the PCB (printed circuit board), the accuracy thereof is low. In the related art, it is common to use an external ceramic oscillator to count external input standard signals, calculate frequency tones, fill a clock frequency register, and time with a SOF (start of frame) interval on a USB bus to implement an infrared control device.
However, in the related art, although the infrared emission precision is improved by using an external ceramic oscillator, the cost is increased by adding peripherals and connections to the clock frequency register, and the process is complicated by using the clock frequency register and using the SOF (start of frame) interval on the USB bus for timing.
Aiming at the problems, considering that in order to save cost and not occupy chip resources and realize infrared control equipment under the condition of external environment change, the applicant provides the infrared compensation processing system provided by the embodiment of the application, by using a real-time clock, an event trigger and an enhanced timer, the event trigger is periodically triggered on the real-time clock to send pulse signals to the enhanced timer, the pulse count value corresponding to the pulse signals is captured by the enhanced timer, and the pulse count value and the clock standard count value obtained by a system clock source are used for determining an infrared carrier compensation value, so that the infrared carrier signals are accurately transmitted, and the calibration compensation is realized under the conditions of not occupying chip resources and not externally increasing equipment. The infrared compensated processing system is described in detail in the following examples.
The following describes an infrared compensation processing system provided in an embodiment of the present application with reference to fig. 1 and 3:
referring to fig. 1, fig. 1 is a schematic diagram of an infrared compensation processing system according to an embodiment of the application, where the infrared compensation processing system may include a real-time clock, an event trigger, a system clock source, an enhancement timer, and an infrared emission unit.
The real-time clock is used for periodically outputting a trigger signal to the event trigger;
the event trigger is used for receiving the trigger signal, generating a pulse signal and sending the pulse signal to the enhancement timer;
the system clock source is used for generating a clock standard count value and sending the clock standard count value to the enhancement timer;
the enhancement timer is used for determining a pulse count value corresponding to the pulse signal and determining an infrared carrier compensation value according to the pulse count value and a clock standard count value;
and the infrared emission unit is used for receiving the infrared carrier compensation value and emitting an infrared carrier signal according to the infrared carrier compensation value.
In the embodiment of the application, the system is mainly used for MCU internal RTC (real time clock), ES (event trigger) and ETM (enhanced timer) modules. The method comprises the steps of periodically triggering an ES through an RTC (real time clock), capturing an ES pulse by using an ETM (electronic toll collection) device, calculating a clock calibration value, capturing a pulse count value corresponding to a pulse signal by using an enhanced timer, determining an infrared carrier compensation value by using the pulse count value and a clock standard count value obtained by a system clock source, and further accurately transmitting an infrared carrier signal. The real-time calibration is realized completely by software, and is only between-40 and 85 degrees regardless of the change of the ambient temperature. And performing calibration compensation.
It should be noted that, in the embodiment of the present application, the infrared carrier deviation phenomenon is corrected by adopting a software compensation method. After the system is powered on, a user initializes ETM (enhanced timer), RTC (Real-Time Counter), ES (event signal trigger) according to the need. The channels of the ES (event signal trigger) and the channel_etm (ETM Channel) of the ETM are configured for chip internal connection. The connection does not occupy system resources such as bus, RAM.
Referring to fig. 2, fig. 2 is a schematic flow chart of an IR compensation process in an IR compensation processing system according to an embodiment of the application.
In some possible implementations, the enhancement timer includes: a pulse counting module;
and the pulse counting module is used for acquiring the count value of the pulse signal generating the falling edge and determining the pulse count value according to the difference value between the first count value acquired by the current falling edge pulse counting module and the second count value acquired by the next falling edge pulse counting module.
When the infrared compensation is performed, the internal clock is calibrated first, the system clock is switched to 8MHZ, the configuration RTC clock source can be selected as an external LOSC (low-speed crystal oscillator), the ETM clock source can be selected as an internal clock 8MHZ falling edge capturing mode, and the RTC, ES, ETM are started.
Consider that to reduce system operations.
For example, the RTC sets es_period (event signal PERIOD) to 1ms, and theoretically, when the clock is 8MHZ, hirctrimref_period (internally high-speed middle reference PERIOD value, actually theoretically calculated) =8000 count values will be generated. The 1ms interval triggers the ES pulse using the RTC, and the ETM captures periodic ES pulses through (ETM Channel), i.e., channel_etm. When the pulse has a falling edge, an enhanced timer interrupt is generated, the captured count value is stored in bef _count (last count value), the next interrupt coming count value is cur_count (current count value), and the difference value between cur_count and bef _count is the actual count value.
In some possible embodiments, the infrared-compensated processing system comprises: a calibration module;
the calibration module is used for correcting the system clock source according to the pulse count value and the clock standard count value.
The calibration module includes: a first calibration module;
the first calibration module is used for downwards adjusting the system clock source and adjusting the falling edge generated by the pulse signal into a first falling edge under the condition that the pulse count value is smaller than the clock standard count value.
In some possible embodiments, the calibration module comprises: a second calibration module;
the second calibration module is used for adjusting the system clock source upwards and adjusting the falling edge generated by the pulse signal into a second falling edge under the condition that the pulse count value is larger than the clock standard count value.
In the above embodiment of the present application, the difference between cur_count and bef _count is the actual count (cycle pulse count value), the count value is compared with the theoretical HIRCTRIM_REF_PERIOD (internal high-speed middle reference cycle value), if the count is smaller than the HIRCTRIM_REF_PERIOD (internal high-speed middle reference cycle value), the existing internal clock is adjusted downward, and if the count is larger than the HIRCTRIM_REF_PERIOD, the existing internal clock is adjusted upward.
Illustratively, calibration may be performed using a 2-way method, from a maximum of 5% adjustment to 0.156%, with a count value captured after 5 adjustments between 7988 and 8012, at which point internal clock calibration is considered complete.
Referring to fig. 3, fig. 3 is a schematic diagram of a mean value operation flow of calculated values in an infrared compensation processing system according to an embodiment of the application.
In some possible embodiments, the calibration module further comprises: a third calibration module;
the third calibration module is used for calibrating the system clock source according to the preset times, and acquiring the average value of the pulse count values acquired corresponding to the calibration times under the condition that the preset times are met.
In some possible implementations, the infrared carrier compensation value includes a first infrared carrier compensation value, and the infrared compensated processing system further includes: the first infrared emission adjustment module;
the first infrared emission adjustment module is used for determining a first infrared carrier compensation value based on the fact that the average value of the pulse count value is subtracted from the clock standard count value and then multiplied by an adjustment coefficient under the condition that the clock standard count value is larger than the average value of the pulse count value.
In some possible implementations, the infrared carrier compensation value includes a second infrared carrier compensation value, and the infrared compensated processing system further includes: the second infrared emission adjustment module;
the second infrared emission adjustment module is used for determining a second infrared carrier compensation value based on the fact that the average value of the pulse count value is less than the average value of the pulse count value, and then the clock standard count value is subtracted from the average value of the pulse count value and then multiplied by an adjustment coefficient.
In some possible embodiments, the infrared-compensated processing system further comprises: an infrared carrier compensation module;
the infrared carrier compensation module is used for calculating an infrared carrier compensation value based on the average value of the clock standard count value and the pulse count value.
In some possible embodiments, the real time clock uses a first calculation formula t= ((division factor+1) × (tick value+1))/real time clock number to determine the period value of the pulse signal that generated the falling edge.
Note that, if the internal high-speed clock is 7.9545mhz and the 1ms calculation value is 7768, the rtclk can be deduced according to the calculation formula of T, and if the timing is 900S, the specific coefficient of 7768 can be deduced.
In the above embodiment of the present application, the calibration frequency may be set to 1, and the count value period (average) may be acquired 3 times, to calculate the average period. If the value of hirctrim_ref_period is greater than the PERIOD (average value), a (a is the calculated adjustment coefficient), otherwise, the obtained value is written into the infrared emission count register, the value of the calculated value is calculated by the equation t= ((division coefficient+1) x (tick value+1))/rtclk (real time clock number) under the condition that the value of the PERIOD T is calculated by the RTC (real time clock), and then the internal high-speed clock is used for deriving the rtclk relation, and the scaling factor is derived by bringing the equation into the equation of T. So far, regardless of the external temperature and humidity changes, the deviation of infrared emissions will be corrected.
The processing system for infrared compensation provided by the embodiment of the application comprises: the system comprises a real-time clock, an event trigger, a system clock source, an enhanced timer and an infrared emission unit, wherein an external low-speed crystal oscillator of the microcontroller is used as an RTC (real-time clock) clock source, pulses are sent out by configuring a trigger ES (event trigger) of the RTC (real-time clock) periodically, an internal high-speed clock is used as an ETM clock source, pulse count values sent out by the event trigger are captured by an ETM (enhanced timer) of the MCU, the pulse count values are compared with clock standard count values, actual deviation is calculated, and internal clock fine adjustment and coarse adjustment registers are gradually adjusted, so that the purposes of adjusting the internal clock accuracy and calculating the difference value between final pulse count values and clock standard count values are achieved. Calculating a calculation equation T= ((frequency division coefficient+1) (tick value+1))/RTCCLK (real time clock number) of a period value T under the condition of 1HZ by using an RTC (real time clock), deriving an RTCCLK relation by using an internal high-speed clock, deriving a proportionality coefficient by taking the equation of T, and calculating an infrared carrier compensation value according to the proportionality coefficient and a difference value, thereby achieving the purpose of accurately transmitting an infrared carrier signal.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above described device embodiments are only illustrative, e.g. the division of the units is only one logical function division, and there may be other divisions in practice, such as: multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. In addition, the various components shown or discussed may be coupled or directly coupled or communicatively coupled to each other via some interface, whether indirectly coupled or communicatively coupled to devices or units, whether electrically, mechanically, or otherwise.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units; can be located in one place or distributed to a plurality of network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated in one unit; the integrated units may be implemented in hardware or in hardware plus software functional units.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, where the program, when executed, performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read Only Memory (ROM), a magnetic disk or an optical disk, or the like, which can store program codes.
Alternatively, the above-described integrated units of the present application may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied essentially or in part in the form of a software product stored in a storage medium, including instructions for causing a controller to perform all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a removable storage device, a ROM, a magnetic disk, or an optical disk.
In the system of the present application, it is apparent that the components or steps may be disassembled, combined, and/or reassembled after disassembly. Such decomposition and/or recombination should be considered as equivalent aspects of the present application. Also, in the foregoing description of specific embodiments of the application, features that are described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (6)
1. An infrared-compensated processing system, comprising:
the real-time clock is used for periodically outputting a trigger signal to the event trigger;
the event trigger is used for receiving the trigger signal, generating a pulse signal and sending the pulse signal to the enhancement timer;
the system clock source is used for generating a clock standard count value and sending the clock standard count value to the enhancement timer;
the boost timer is configured to determine a pulse count value corresponding to the pulse signal, and determine an infrared carrier compensation value according to the pulse count value and the clock standard count value, where the boost timer includes: the pulse counting module is used for acquiring a count value of a pulse signal generating a falling edge, determining the pulse count value according to a difference value between a first count value acquired by the pulse counting module at the current falling edge and a second count value acquired by the pulse counting module at the next falling edge, and determining a period value of the pulse signal generating the falling edge by adopting a first calculation formula T= ((frequency division coefficient+1) x (tick value+1))/real-time clock number;
the calibration module is used for correcting the system clock source according to the pulse count value and the clock standard count value;
the infrared carrier compensation module is used for calculating an infrared carrier compensation value based on the average value of the clock standard count value and the pulse count value; and
and the infrared emission unit is used for receiving the infrared carrier compensation value and emitting an infrared carrier signal according to the infrared carrier compensation value.
2. The system of claim 1, wherein the calibration module comprises: a first calibration module;
the first calibration module is used for downwards adjusting the system clock source and adjusting the falling edge generated by the pulse signal into a first falling edge under the condition that the pulse count value is smaller than the clock standard count value.
3. The system of claim 1, wherein the calibration module comprises: a second calibration module;
the second calibration module is configured to adjust the system clock source upwards and adjust a falling edge generated by the pulse signal to be a second falling edge when the pulse count value is greater than the clock standard count value.
4. The system of claim 1, wherein the calibration module further comprises: a third calibration module;
the third calibration module is used for calibrating the system clock source according to preset times, and acquiring the average value of the pulse count values acquired correspondingly by the calibration times under the condition that the preset times are met.
5. The system of claim 1, wherein the infrared carrier compensation value comprises a first infrared carrier compensation value, the infrared compensated processing system further comprising: the first infrared emission adjustment module;
the first infrared emission adjustment module is used for determining a first infrared carrier compensation value based on the condition that the clock standard count value is larger than the average value of the pulse count value, and multiplying an adjustment coefficient after subtracting the average value of the pulse count value from the clock standard count value.
6. The system of claim 1, wherein the infrared carrier compensation value comprises a second infrared carrier compensation value, the infrared compensated processing system further comprising: the second infrared emission adjustment module;
the second infrared emission adjustment module is used for determining a second infrared carrier compensation value based on the fact that the average value of the pulse count value subtracts the clock standard count value and then multiplies the clock standard count value by an adjustment coefficient under the condition that the clock standard count value is smaller than the average value of the pulse count value.
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| CN110308762A (en) * | 2019-06-21 | 2019-10-08 | 广芯微电子（广州）股份有限公司 | A kind of clock frequency calibration method of chip interior clock source |
| CN113346881A (en) * | 2021-05-27 | 2021-09-03 | 珠海东之尼电子科技有限公司 | Digital clock calibration method, wireless remote controller and storage medium |
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