CN113660714B - Low-power consumption awakening method based on specific feature code - Google Patents
Low-power consumption awakening method based on specific feature code Download PDFInfo
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- CN113660714B CN113660714B CN202110872128.7A CN202110872128A CN113660714B CN 113660714 B CN113660714 B CN 113660714B CN 202110872128 A CN202110872128 A CN 202110872128A CN 113660714 B CN113660714 B CN 113660714B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000000630 rising effect Effects 0.000 claims abstract description 13
- 230000001960 triggered effect Effects 0.000 claims abstract description 9
- 230000002618 waking effect Effects 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/60—Arrangements in telecontrol or telemetry systems for transmitting utility meters data, i.e. transmission of data from the reader of the utility meter
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention discloses a low-power consumption awakening method based on a specific feature code, which comprises the following steps of: step 1, connecting a signal receiving module to an external interrupt pin of a control module, configuring the pin as a rising edge interrupt trigger mode or a falling edge interrupt trigger mode, wherein the pin is used as a trigger pin for wake-up judgment and is also used as a receiving pin for receiving a feature code signal; then the equipment works in a low power consumption state; step 2, after the external interrupt pin is triggered, switching to an interrupt service function, and starting to record information received by the external interrupt pin; and 3, after the recording is completed, judging whether the information received by the external interrupt pin is matched with a preset feature code, if so, waking up the equipment, and if not, turning to the step 2, and waiting for the next interrupt to be triggered. The invention uses the external interrupt mechanism to replace the timing wake-up mechanism, thereby greatly reducing the power consumption, breaking through the limit of the communication protocol and having the advantages of strong flexibility and good compatibility.
Description
Technical Field
The present invention relates to a method for waking up an electronic device, and more particularly, to a method for waking up an electric energy meter in a low power consumption state.
Background
At present, the national network requires that the electricity meter infrared be awakened only when three bytes of '68 11 04' are received. In order to enable the electric energy meter to support the infrared wake-up meter reading function of the specific message, the implementation mode in the prior art is to enable the electric energy meter to wake up at regular time in a low power consumption state, configure the infrared function, start the infrared receiving tube for a period of time, judge whether the specific message is received in a designated time, start the meter reading function if the specific message is received, and return to the low power consumption state if the specific message is not received.
The data receiving rule must meet the UART asynchronous serial port communication protocol to further analyze the data, so that the UART peripheral must be configured and started for a period of time to identify the wake-up byte, which leads to frequent withdrawal of the electric energy meter, use of UART, and reentry of the low power consumption mode, resulting in high power consumption and affecting the service life of the battery.
Disclosure of Invention
The invention provides a low-power consumption awakening method based on a specific feature code, which aims at: and the power consumption in the wake-up process is reduced.
The technical scheme of the invention is as follows:
A low-power consumption wake-up method based on specific feature codes is used for determining whether to wake up equipment according to the matching condition between a received signal and preset feature codes, and comprises the following steps:
step 1, connecting a signal receiving module to an external interrupt pin of a control module, configuring the pin as a rising edge interrupt trigger mode or a falling edge interrupt trigger mode, wherein the pin is used as a trigger pin for wake-up judgment and is also used as a receiving pin for receiving a feature code signal; then the equipment works in a low power consumption state;
step 2, after the external interrupt pin is triggered, switching to an interrupt service function, and starting to record information received by the external interrupt pin;
And 3, after the recording is completed, judging whether the information received by the external interrupt pin is matched with a preset feature code, if so, waking up the equipment, and if not, turning to the step 2, and waiting for the next interrupt to be triggered.
As a further improvement of the wake-up method: in step 2, the time interval information of the interrupt trigger signal received by the external interrupt pin is recorded.
As a further improvement of the wake-up method: the recording method in the step 2 is as follows:
Step 2.1, starting a timer; defining variables count, time1 and Time2, setting count as 1, time1 as current timer Time, and Time2 as 0; defining an array F, and setting the index of the array F as f_count, wherein f_count=0;
Step 2.2, waiting for the next interrupt trigger signal, and switching to step 2.3 when receiving a new interrupt trigger signal;
Step 2.3, let count=count+1; if count=1 at this Time, the Time of the current timer is recorded into Time1, and then step 2.4 is carried out; if count=2, recording the Time of the current timer into Time2, then letting F [ f_count ] =Time 2-Time 1, and then letting f_count=f_count+1, and then clearing count, time1 and Time2, and then turning to step 2.4;
And 2.4, ending the step 2 if f_count is larger than a preset value, and taking the array F as time interval information of an interrupt trigger signal, otherwise, turning to the step 2.2.
As a further improvement of the wake-up method: in step 3, the time interval information of waveform change corresponding to the feature code is matched with the time interval information of the interrupt trigger signal recorded in step 2 for judgment.
As a further improvement of the wake-up method: before step 3 is performed, a standard interval array f_standard representing the time interval information of waveform change is established according to the feature code:
step A, transmitting a group of feature codes to obtain a waveform diagram of the feature codes, taking all interrupt trigger points in the waveform diagram, setting n interrupt interval groups in a group of two groups according to time sequence, and setting the time interval between two interrupt trigger points in the ith interrupt interval group as Ti;
Step B, setting the length of the standard interval array F_standard as n, and sequentially writing n Ti into the F_standard;
and C, traversing the interrupt interval group, and marking the element in the F_standard corresponding to the interrupt interval group as ignore if two interrupt trigger points contained in the interrupt interval group belong to two different bytes in the feature code respectively.
As a further improvement of the wake-up method: step 3, traversing all time interval values in the time interval information recorded in the step 2, and judging that the time interval value is matched with the element if the difference value between a certain time interval value and the first element of the standard interval array F_standard is within a preset threshold value; then, taking the starting point as the starting point, sequentially judging whether the subsequent n-1 time interval values are matched with the n-1 elements remained in the F_standard in a one-to-one correspondence manner, and if the elements in the F_standard are marked as 'ignored', directly recognizing that the time interval values are matched with the elements;
If all n elements in the F_standard are judged to be matched, the signal received by the external interrupt pin is judged to be matched with the preset feature code, the device is awakened, and otherwise, the device is judged to be not matched.
Compared with the prior art, the invention has the following beneficial effects: (1) The invention uses the external interrupt mechanism to replace the timed wake-up mechanism, and the regular mode is converted into the trigger mode, and the judgment can be carried out only when the interrupt is triggered, thereby avoiding frequent automatic wake-up and greatly reducing the power consumption; (2) The interrupt pin is not only a trigger pin, but also a receiving pin of the feature code signal, and peripheral equipment such as UART and the like are not required to be started in the whole process, so that the power consumption is further reduced; (3) The waveform diagram based on the feature codes establishes a standard interval array F_standard, marks the cross-byte elements therein as ignore, solves the problem of misjudgment caused by the uncertain time interval between the feature code word nodes, and therefore, a transmitting end is not required to transmit the feature codes according to a specific communication protocol, and the limitation of the communication protocol is thoroughly broken through, and the method has strong flexibility and good compatibility.
Drawings
Fig. 1 is a waveform diagram of a "68 11 04" signature received by an external interrupt pin.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings:
a low-power consumption wake-up method based on specific feature codes running on an electric energy meter is characterized in that the feature codes are '68 11 04' according to national network specification, and the total number of the feature codes is 3 bytes, and the waveform diagram is shown in figure 1.
The wake-up method comprises the following steps:
Step 1, connecting a signal receiving module to an external interrupt pin of a control module, and configuring the pin as a rising edge interrupt trigger mode or a falling edge interrupt trigger mode. In this embodiment, a rising edge trigger mode is used. The pin is used as a trigger pin for wake-up judgment and is also used as a receiving pin for receiving the feature code signals. The device is then set to operate in a low power consumption state.
And step 2, after the external interrupt pin is triggered (namely, a rising edge is received), switching to an interrupt service function, and starting to record information received by the external interrupt pin. If the rising edge is not received all the time, the device can always work in a low power consumption state without automatic wake-up or periodic judgment.
After receiving the rising edge signal, starting to record the time interval information of the rising edge received by the external interrupt pin, namely monitoring the time intervals among all the received rising edge signals, wherein the specific method comprises the following steps:
step 2.1, starting a timer; defining variables count, time1 and Time2, setting count as 1, time1 as current timer Time, and Time2 as 0; defining an array F, and setting the index of the array F as f_count, wherein f_count=0.
Step 2.2, waiting for the next interrupt trigger signal, and switching to step 2.3 when receiving a new interrupt trigger signal;
Step 2.3, let count=count+1; if count=1 at this Time, the Time of the current timer is recorded into Time1, and then step 2.4 is carried out; if count=2, recording the Time of the current timer into Time2, then letting F [ f_count ] =Time 2-Time 1, and then letting f_count=f_count+1, and then clearing count, time1 and Time2, and then turning to step 2.4;
Step 2.4, if f_count is greater than a preset value (generally set to 14, that is, 15 rising edges need to be received, and enough data is guaranteed to be judged), step 2 is ended, the array F is used as time interval information of the interrupt trigger signal, and otherwise, step 2.2 is performed.
Finally, array f= [ t1, t2, … …, t15], contains 15 elements.
Next, a standard interval array f_standard representing time interval information of waveform change needs to be established in advance according to the feature code:
Step A, transmitting a group of feature codes to obtain a waveform diagram (shown in figure 1) of the feature codes, taking all interrupt trigger points (namely all rising edges, 8 positions in total) in the waveform diagram, wherein the two groups are arranged in a time sequence, 4 interrupt interval groups can be obtained, and the time interval between two interrupt trigger points in the ith interrupt interval group is Ti;
Step B, setting the length of the standard interval array F_standard to be 4, and sequentially writing 4 Ti into the F_standard; i.e., f_standard= [ T1, T2, T3, T4];
And C, traversing 4 interrupt interval groups, and marking the element in the F_standard corresponding to the interrupt interval group as ignore if two interrupt trigger points contained in the interrupt interval groups respectively belong to two different bytes in the feature code. In this embodiment, the 2 rising edges corresponding to T2 belong to byte "68" and byte "11", respectively. Since the transmission and reception of the desired signal is not limited by the communication protocol, that is, a specific communication protocol such as serial port is not adopted, the time interval between two bytes is virtually uncertain, so that T2 may cause erroneous judgment during judgment and be ignored.
And 3, after the recording is completed, judging whether the information received by the external interrupt pin is matched with a preset feature code, if so, waking up the equipment, and if not, turning to the step 2, and waiting for the next interrupt to be triggered.
Specifically, the matching judgment is performed between the time interval information (i.e. array f_standard) of the waveform change corresponding to the feature code and the time interval information (i.e. array F) of the interrupt trigger signal recorded in step 2: traversing 15 time interval values in the array F, and judging that T1 is matched with T1 if the difference between a certain time interval value (supposedly T1) and the first element T1 of the standard interval array F_standard is within a preset threshold value; then, with this as a starting point, it is sequentially determined whether the subsequent 3 time interval values are matched with the remaining 3 elements in the f_standard in a one-to-one correspondence manner, that is, whether T2 and T2, T3 and T3, and T4 can be respectively matched. At the time of judgment, since T2 in the f_standard has been marked as "ignored", T2 and T2 are directly judged to be matched. Therefore, as long as the following T3, T4 and T4 are all confirmed to be matched with each other, the signal received by the external interrupt pin can be judged to be matched with the preset feature code, and the equipment is awakened; otherwise, the matching is judged.
Claims (2)
1. A low power consumption wake-up method based on specific feature codes, which is used for determining whether to wake up equipment according to the matching condition between a received signal and preset feature codes, and is characterized by comprising the following steps:
step 1, connecting a signal receiving module to an external interrupt pin of a control module, configuring the pin as a rising edge interrupt trigger mode or a falling edge interrupt trigger mode, wherein the pin is used as a trigger pin for wake-up judgment and is also used as a receiving pin for receiving a feature code signal; then the equipment works in a low power consumption state;
step 2, after the external interrupt pin is triggered, switching to an interrupt service function, and starting to record information received by the external interrupt pin;
in step2, the time interval information of the interrupt trigger signal received by the external interrupt pin is recorded;
step 3, after the recording is completed, judging whether the information received by the external interrupt pin is matched with a preset feature code, if so, waking up the equipment, and if not, turning to step 2, and waiting for the next interrupt to be triggered;
in the step 3, matching and judging the time interval information of waveform change corresponding to the feature code with the time interval information of the interrupt trigger signal recorded in the step 2;
before step 3 is performed, a standard interval array f_standard representing the time interval information of waveform change is established according to the feature code:
step A, transmitting a group of feature codes to obtain a waveform diagram of the feature codes, taking all interrupt trigger points in the waveform diagram, setting n interrupt interval groups in a group of two groups according to time sequence, and setting the time interval between two interrupt trigger points in the ith interrupt interval group as Ti;
Step B, setting the length of the standard interval array F_standard as n, and sequentially writing n Ti into the F_standard;
Step C, traversing the interrupt interval group, and marking the element in the F_standard corresponding to the interrupt interval group as ignore if two interrupt trigger points contained in the interrupt interval group belong to two different bytes in the feature code respectively;
Step 3, traversing all time interval values in the time interval information recorded in the step 2, and judging that the time interval value is matched with the element if the difference value between a certain time interval value and the first element of the standard interval array F_standard is within a preset threshold value; then, taking the starting point as the starting point, sequentially judging whether the subsequent n-1 time interval values are matched with the n-1 elements remained in the F_standard in a one-to-one correspondence manner, and if the elements in the F_standard are marked as 'ignored', directly recognizing that the time interval values are matched with the elements;
If all n elements in the F_standard are judged to be matched, the signal received by the external interrupt pin is judged to be matched with the preset feature code, the device is awakened, and otherwise, the device is judged to be not matched.
2. The low power consumption wake-up method based on specific feature codes as claimed in claim 1, wherein the recording method in step 2 is as follows:
Step 2.1, starting a timer; defining variables count, time1 and Time2, setting count as 1, time1 as current timer Time, and Time2 as 0; defining an array F, and setting the index of the array F as f_count, wherein f_count=0;
Step 2.2, waiting for the next interrupt trigger signal, and switching to step 2.3 when receiving a new interrupt trigger signal;
Step 2.3, let count=count+1; if count=1 at this Time, the Time of the current timer is recorded into Time1, and then step 2.4 is carried out; if count=2, recording the Time of the current timer into Time2, then letting F [ f_count ] =Time 2-Time 1, and then letting f_count=f_count+1, and then clearing count, time1 and Time2, and then turning to step 2.4;
And 2.4, ending the step 2 if f_count is larger than a preset value, and taking the array F as time interval information of an interrupt trigger signal, otherwise, turning to the step 2.2.
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