CN114688679A - Air conditioner parameter reading method and air conditioner - Google Patents
Air conditioner parameter reading method and air conditioner Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000002159 abnormal effect Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0016—Inter-integrated circuit (I2C)
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Computer Hardware Design (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner parameter reading method and an air conditioner, wherein the air conditioner comprises a controller and a memory, the controller comprises an SDA port, and the SDA port is connected with the memory through an SDA data line; the air conditioner parameter reading method comprises the steps of configuring an SDA port as a first GPIO port and detecting a level signal of the first GPIO port; judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port; when the SDA data line is not short-circuited, the GPIO port is reconfigured to be the SDA port to read the air conditioner parameters stored in the memory, so that whether the SDA data line is short-circuited to the ground or not is detected before the air conditioner parameters are read, and abnormal data parameter reading caused by the fact that the SDA data line is short-circuited to the ground can be effectively avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner parameter reading method and an air conditioner.
Background
The air conditioner outdoor unit control unit usually adopts a mode of combining an MCU (microprogrammed control unit) and an EEPROM (electrically erasable and programmable read only memory), wherein a universal control code is stored in the MCU, and differentiated control parameters are stored in the EEPROM so as to realize the compatibility of a main control logic to various system models.
Wherein, parameter reading between the MCU and the EEPROM is carried out according to I2C bus communication. Currently, the general E-party parameter reading is realized, a check mechanism for parameter reading in control logic is generally compared according to check codes, if the check codes are consistent, the task is successfully read, otherwise, the E-party fault is reported in case of reading failure, the check codes are performed according to the mode of the sum of all parameters, when only a data line SDA in an I2C bus is short-circuited to the ground, the read parameters are always 0, the sum of the parameters is also 0, and thus, the check is consistent, the error of data reading is caused, and the control on the air conditioner is influenced.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
The invention aims to provide an air conditioner parameter reading method and an air conditioner, which can effectively solve the problem of abnormal data reading caused by the short circuit of an SDA data line to the ground.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the application provides an air conditioner parameter reading method, the air conditioner comprises a controller and a memory, the controller comprises an SDA port, the SDA port is connected with the memory through an SDA data line, and the parameter reading method comprises the following steps:
configuring the SDA port as a first GPIO port and detecting a level signal of the first GPIO port;
judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port;
when the SDA data line is not short-circuited, the GPIO port is reconfigured as an SDA port to read the air conditioner parameters stored in the memory.
In some embodiments, the step of determining whether the SDA data line is short-circuited according to the level signal of the first GPIO port includes:
when the level signal of the first GPIO port is the first level signal, judging that the SDA data line is short-circuited;
and when the level signal of the first GPIO port is the second level signal, judging that the SDA data line is not short-circuited.
In some embodiments of the air conditioner parameter reading method, the controller further includes an SCL port, the SCL port is connected to the memory through an SCL clock line, and the step of reconfiguring the first GPIO port to the SDA port further includes:
configuring the SCL port as a second GPIO port;
setting the level signals of the first GPIO port and the second GPIO port as second level signals;
detecting whether the level signals of the first GPIO port and the second GPIO port are set second level signals or not;
and when the level signals of the first GPIO port and the second GPIO port are both second level signals, reconfiguring the second GPIO port into an SCL port.
In some embodiments, the step of determining whether the SDA port is short-circuited according to the level signal of the first GPIO port further includes:
and when the SDA data line is short-circuited, outputting short-circuit abnormal information.
In some embodiments, the air conditioner parameter reading method further includes, after the step of detecting whether the level signals of the first GPIO port and the second GPIO port are both set second level signals:
and when any one of the level signals of the first GPIO port and the second GPIO port is a first level signal, outputting communication fault information.
In some embodiments of the method for reading parameters of an air conditioner, the first level signal is a low level signal and the second level signal is a high level signal.
In some embodiments, the method for reading air conditioner parameters, the step of reading the air conditioner parameters stored in the memory is followed by:
and checking the parameters of the air conditioner.
In some embodiments, the step of verifying the air conditioner parameter includes:
calculating a check value of the effective parameter according to a preset check rule;
and comparing the check value with the check parameter, and when the check value is equal to the check parameter, indicating that the parameter of the air conditioner is successfully read.
The embodiment of the application also provides an air conditioner, which comprises a controller, a memory and an I2C bus, wherein the controller comprises an SDA port and an SCL port, the I2C bus comprises an SDA data line and an SCL clock line, the SDA port is connected with the memory through the SDA data line, and the SCL port is connected with the memory through the SCL clock line; the controller is used for executing the air conditioner parameter reading method; the memory is used for storing air conditioner parameters.
In some embodiments, the memory is a charged erasable programmable read only memory.
Compared with the prior art, the invention provides the air conditioner parameter reading method and the air conditioner, which are characterized in that whether the SDA data line is in short circuit and grounded or not is detected before the air conditioner parameter is read, and the air conditioner parameter is read when the SDA data line is detected not to be in short circuit, so that the problem of abnormal air conditioner parameter reading caused by abnormal short circuit of the SDA data line is effectively solved.
Drawings
Fig. 1 is a block diagram of an air conditioner according to the present invention.
Fig. 2 is a flowchart of an air conditioner parameter reading method according to the present invention.
Fig. 3 is a flowchart of a first embodiment of a method for reading parameters of an air conditioner according to the present invention.
Fig. 4 is a flowchart illustrating a second embodiment of a method for reading parameters of an air conditioner according to the present invention.
Detailed Description
The invention aims to provide an air conditioner parameter reading method and an air conditioner, which can effectively solve the problem of abnormal data reading caused by the short circuit of an SDA data line to the ground.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2 together, in the method for reading parameters of an air conditioner according to the present invention, the air conditioner includes a controller 11 and a memory 12, wherein the controller 11 and the memory 12 perform data communication via an I2C bus 13. The communication principle is to generate signals required by the I2C bus 13 protocol for data transmission by controlling the high-low level timing of the SCL clock line and the SDA data line in the I2C bus 13. In the I2C bus 13 idle state, the two lines are typically pulled high by the pull-up resistor connected above, remaining high. The I2C communication is divided into hardware I2C and software simulation I2C, so called, the hardware I2C corresponds to the I2C peripheral on the chip, and is provided with a corresponding I2C driving circuit, and the used I2C pin is also special; software I2C is typically implemented using GPIO pins with software controlling the pin state to simulate the I2C communications waveform. The efficiency of the hardware I2C is much higher than that of software, and the interface of the software I2C is flexible because the software is not limited by pins. The analog I2C simulates the working mode of a register through a GPIO pin by software, and the hardware (firmware) I2C directly calls an internal register to configure. Hardware I2C is faster than analog and can be accessed using DMA (direct memory access, direct memory 12). Software I2C is a timing sequence that simulates the I2C protocol using a program to control the SCL clock line and SDA data line to output high-low.
Referring to fig. 2, in the present embodiment, the controller 11 includes an SDA port, the SDA port is connected to the memory 12 through an SDA data line, and the method for reading the air conditioner parameter includes the following steps:
100. configuring the SDA port as a first GPIO port and detecting a level signal of the first GPIO port;
200. judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port;
300. when the SDA data line is not shorted, the GPIO port is reconfigured as the SDA port to read the air conditioner parameters stored in the memory 12.
In this embodiment, before formal reading of the air conditioner parameters, the SDA port in the controller 11 is first configured as a GPIO port. The SDA port herein refers to a pin in the controller 11, and the pin is configured by the controller 11 to perform a data transmission function corresponding to the SDA data line. Likewise, the controller 11 may configure the pin as a port that may perform other functions, for example, the controller 11 may configure the pin as a general GPIO port. In this embodiment, the controller 11 configures the SDA port as the first GPIO port before the SDA port reads the air conditioner parameter in the memory 12, then detects the level signal of the first GPIO port, determines whether the SDA data line is shorted to ground according to the level signal of the first GPIO port, and configures the first GPIO port as the SDA port to read the air conditioner parameter stored in the memory 12 when it is determined that the SDA data line is not shorted, thereby effectively avoiding data abnormality caused by an SDA data line short circuit abnormality.
Further, the step of judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port includes: when the level signal of the first GPIO port is the first level signal, judging that the SDA data line is short-circuited; and when the level signal of the first GPIO port is the second level signal, judging that the SDA data line is not short-circuited. In this embodiment, the first level signal is a low level signal, and the second level signal is a high level signal. That is, after the controller 11 configures the SDA port as the first GPIO port, since the first GPIO port is further connected to the SDA data line, if the SDA data line is shorted to ground, the corresponding first GPIO port is shorted to ground, and then the level signal of the first GPIO port is a low level signal at this time. If the controller 11 detects that the first GPIO port is a low level signal, it determines that the SDA data line is shorted to ground. If the controller 11 detects that the first GPIO port is a high-level signal, it determines that the SDA data line is not shorted, and further implements effective detection of whether the SDA data line is shorted.
Further, the step of judging whether the SDA port is short-circuited according to the level signal of the first GPIO port further includes: and when the SDA data line is short-circuited, outputting short-circuit abnormal information. That is, when the controller 11 detects that the level signal of the first GPIO port is a low level signal, it determines that the SDA data line is short-circuited and outputs short-circuit abnormal information, so as to perform subsequent targeted troubleshooting, and ensure that the air-conditioning parameters are read normally.
When the controller 11 and the memory 12 communicate via I2C, the controller 11 acts as a master and the memory 12 acts as a slave, the master reset may cause the I2C bus 13 to be locked, I2C bus 13 is locked as the SCL port is high and the SDA port is always low. Specifically, in the process of performing read-write operation by the master device, the master device controls the SCL clock line to transmit 8 clock pulses after the start signal, then pulls down the level signal of the SCL clock line to a low level, and at this time, the slave device outputs the response signal to pull down the level signal of the SDA data line to a low level. If the master device is abnormally reset at this time, the SCL clock line is released to a high level. At this time, if the slave device is not reset, the I2C reply continues, pulling the SDA data line level signal low until the SCL clock line level signal goes low, ending the reply signal. For the I2C master device, after reset, the level signal of the SCL clock line and the level signal of the SDA data line are detected, and if the level signal of the SDA data line is found to be low, the I2C bus 13 will be considered to be occupied, and will wait for the level signal of the SCL clock line and the level signal of the SDA data line to become high. Thus, the I2C master waits for the slave to release the SDA signal to pull the SDA data line level signal low, while the I2C slave waits for the master to pull the SCL clock line level signal low to release the acknowledge signal, waiting for each other, and the I2C bus 13 enters a deadlock state.
Referring to fig. 3, the controller 11 further includes an SCL port, and the SCL port is connected to the memory 12 through an SCL clock line. The step of reconfiguring the first GPIO port as an SDA port further comprises, prior to the step of reconfiguring the first GPIO port as an SDA port:
10. configuring the SCL port as a second GPIO port;
20. setting the level signals of the first GPIO port and the second GPIO port as second level signals;
30. detecting whether the level signals of the first GPIO port and the second GPIO port are set second level signals;
40. and when the level signals of the first GPIO port and the second GPIO port are both second level signals, reconfiguring the second GPIO port into an SCL port.
That is, after it is confirmed that the end short circuit of the SDA data line has not occurred, in order to avoid the problem of the I2C bus 13 being locked, all the level signals of the I2C bus 13 are pulled up to the high level, and then whether the level signals of the I2C bus 13 are all at the high level is read, and after it is confirmed that the level signals of the I2C bus 13 are all at the high level, data is read, so that the I2C bus 13 can be effectively prevented from being locked. Specifically, while configuring the SDA port with the ordinary GPIO port, the controller 11 may also configure the SCL port with the ordinary port, in this embodiment, the controller 11 configures the SCL port with the second GPIO port, and then after it is determined that the SDA data line is not short-circuited, both the level signals of the first GPIO port and the second GPIO port are set to the second level signal; and detecting whether the level signals of the first GPIO port and the second GPIO port are set second level signals, and if the level signals of the first GPIO port and the second GPIO port are the second level signals, respectively configuring the first GPIO port and the second GPIO port as an SDA port and an SCL port so as to be convenient for subsequent I2C communication with the memory 12, thereby avoiding the problem of I2C bus 13 locking. On the contrary, when any one of the level signals of the first GPIO port and the second GPIO port is the first level signal, the communication fault information is output so as to facilitate the subsequent fault removal.
Further, referring to fig. 4, the step of reading the air conditioner parameters stored in the memory 12 includes: and checking the parameters of the air conditioner. The controller 11 checks the air conditioner parameters after reading the air conditioner parameters of the memory 12 to improve the accuracy of data acquisition.
Specifically, the air conditioner parameters include effective parameters and verification parameters, wherein the step of verifying the air conditioner parameters specifically includes:
50. calculating a check value of the effective parameter according to a preset check rule;
60. and comparing the check value with the check parameter, and when the check value is equal to the check parameter, indicating that the parameter of the air conditioner is successfully read.
After reading the air conditioner parameters in the memory 12, the controller 11 calculates the check values of the effective parameters in the air conditioner parameters according to a preset check rule, for example, the effective parameters are accumulated to obtain the check values, and then the check values are compared with the check parameters, if the check values are equal to the check parameters, the acquired air conditioner parameters are the required accurate data, so that the accuracy of parameter acquisition is improved by checking the acquired air conditioner parameters.
Further, the present invention also provides an air conditioner, which includes a controller, a memory and an I2C bus, wherein the controller includes an SDA port and an SCL port, the I2C bus includes an SDA data line and an SCL clock line, the SDA port is connected to the memory through the SDA data line, and the SCL port is connected to the memory through the SCL clock line; the controller is used for executing the air conditioner parameter reading method; the memory is used for storing air conditioner parameters, and the memory in the embodiment is a charged erasable programmable read only memory, and since the above detailed description is made on the air conditioner parameter reading method, the detailed description is omitted here.
In summary, the air conditioner parameter reading method and the air conditioner provided by the present invention include that the air conditioner includes a controller and a memory, the controller includes an SDA port, and the SDA port is connected to the memory through an SDA data line; the air conditioner parameter reading method comprises the steps of configuring an SDA port as a first GPIO port and detecting a level signal of the first GPIO port; judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port; when the SDA data line is not short-circuited, the GPIO port is reconfigured to be the SDA port so as to read the air conditioner parameters stored in the memory. The method and the device detect whether the SDA data line is short-circuited to the ground before the air conditioner parameter is read, and can effectively avoid abnormal data parameter reading caused by the short circuit of the SDA data line to the ground.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. An air conditioner parameter reading method, wherein the air conditioner comprises a controller and a memory, the controller comprises an SDA port, the SDA port is connected with the memory through an SDA data line, and the parameter reading method comprises the following steps:
configuring the SDA port as a first GPIO port and detecting a level signal of the first GPIO port;
judging whether the SDA data line is short-circuited according to the level signal of the first GPIO port;
when the SDA data line is not short-circuited, the GPIO port is reconfigured to be the SDA port so as to read the air conditioner parameters stored in the memory.
2. The air conditioner parameter reading method according to claim 1, wherein the step of determining whether the SDA data line is short-circuited according to the level signal of the first GPIO port comprises:
when the level signal of the first GPIO port is a first level signal, judging that the SDA data line is short-circuited;
and when the level signal of the first GPIO port is a second level signal, judging that the SDA data line is not short-circuited.
3. The air conditioner parameter reading method according to claim 1, wherein the controller further includes an SCL port connected to the memory through an SCL clock line, and the step of reconfiguring the first GPIO port to be the SDA port further includes, before the step of:
configuring the SCL port as a second GPIO port;
setting the level signals of the first GPIO port and the second GPIO port to be second level signals;
detecting whether level signals of the first GPIO port and the second GPIO port are the set second level signals;
when the level signals of the first GPIO port and the second GPIO port are both the second level signals, the second GPIO port is reconfigured to be the SCL port.
4. The air conditioner parameter reading method according to claim 2, wherein the step after determining whether the SDA port is short-circuited according to the level signal of the first GPIO port further comprises:
and when the SDA data line is short-circuited, outputting short-circuit abnormal information.
5. The air conditioner parameter reading method according to claim 3, wherein the step of detecting whether the level signals of the first GPIO port and the second GPIO port are both the set second level signals is followed by further comprising:
and when any one of the level signals of the first GPIO port and the second GPIO port is the first level signal, outputting communication fault information.
6. The air conditioner parameter reading method according to any one of claims 1 to 5, wherein the first level signal is a low level signal and the second level signal is a high level signal.
7. The air conditioner parameter reading method according to claim 1, wherein the step of reading the air conditioner parameter stored in the memory is followed by:
and verifying the air conditioner parameters.
8. The air conditioner parameter reading method according to claim 7, wherein the air conditioner parameters include valid parameters and verification parameters, and the step of verifying the air conditioner parameters specifically includes:
calculating a check value of the effective parameter according to a preset check rule;
and comparing the check value with the check parameter, and when the check value is equal to the check parameter, indicating that the air conditioner parameter is successfully read.
9. An air conditioner comprising a controller, a memory and an I2C bus, the controller comprising an SDA port and an SCL port, the I2C bus comprising an SDA data line and an SCL clock line, the SDA port connected with the memory through the SDA data line and the SCL port connected with the memory through the SCL clock line; the controller is used for executing the air conditioner parameter reading method according to any one of claims 1 to 8; the memory is used for storing the air conditioner parameters.
10. The air conditioner of claim 9, wherein the memory is a charged erasable programmable read only memory.
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