CN114443070A - Air conditioner and method for burning internal storage space of microcontroller of air conditioner - Google Patents

Abstract

The invention discloses an air conditioner and a burning method for an internal storage space of a microcontroller of the air conditioner, wherein the air conditioner comprises an external burner and the microcontroller, and the microcontroller is configured as follows: when the MCU receives a read command, returning data corresponding to the address to the external burner according to the address sent by the external burner; and when the MCU receives a write command, writing the data to be written into the corresponding area of the MCU according to the address sent by the external burner and the data to be written, thereby realizing the purposes of improving the universality of the MCU burning produced by various manufacturers and reducing the cost.

Description

An air conditioner and an air conditioner microcontroller internal storage space programming method

technical field

The present application relates to the technical field of air conditioners, and more particularly, to an air conditioner and a method for burning the internal storage space of an air conditioner microcontroller.

Background technique

In the air-conditioning industry, an external storage medium is usually used to store part of the data. This part of the data stored can include operation information, model information, protection status data, etc. The MCU reads these data and implements product functions with its own program. In the past, the external eeprom was usually used as the storage medium. Because the eeprom design side uses the IIC communication method for data programming and reading, the controller chip (MCU, etc.) and the eeprom also use this method for data interaction.

However, with the development of the MCU, the function of increasing the internal storage space has been added, which can replace the original eeprom of the air conditioner and store the operating data required by the air conditioner. This does not change the function and overall software implementation form of the whole air conditioner, at the same time, it can reduce components such as eeprom IC and reduce product cost.

MCU has its own unique programming system, including programming tools, programming ports and programming methods, etc., which is more complicated than eeprom's IIC programming method. The MCU programming system is completely inconsistent with the previous eeprom programming system, that is, it is not compatible with the current production, after-sales, etc., and the compatibility is poor. Using the MCU programming system can realize the reading and writing of its internal storage space, but the MCU programming system is usually more complicated and the cost is higher. At the same time, the design of each MCU manufacturer is different, and its programming system is also different, which is difficult to be compatible, that is, the general-purpose type is very poor.

Therefore, how to provide an air conditioner and a method for programming the internal storage space of the microcontroller of the air conditioner to improve the versatility of MCU programming and reduce costs is a technical problem to be solved at present.

SUMMARY OF THE INVENTION

The invention provides an air conditioner, which is used to solve the technical problem that the design of each MCU manufacturer in the prior art is different, the programming systems thereof are also different, and compatibility is difficult, that is, the general type is poor.

The air conditioner includes:

External programmer, to exchange data with the air conditioner MCU through IIC;

The MCU microcontroller is provided with a DATAFLASH space, and the space is used for parameter storage;

The MCU, is configured to:

After the MCU receives the read command, it returns the data corresponding to the address to the external programmer according to the address sent by the external programmer;

When the MCU receives the write command, the data to be written is written into the corresponding area of the MCU according to the address sent by the external programmer and the data to be written.

In some embodiments of the present application, the data protocol between the microcontroller and the external programmer is consistent with the programming protocol of the EEPROM.

In some embodiments of the present application, the external programmer and the microcontroller are reset, so as to pull down the reset signal when the programmer is working, so that the microcontroller does not work.

In some embodiments of the present application, the DATAFLASH space is an area for implementing data storage.

Correspondingly, the present invention also proposes a method for programming the internal storage space of an air conditioner microcontroller, which is applied to an air conditioner including an external programmer and a microcontroller, and the method includes:

After the microcontroller receives the read command, it returns the data corresponding to the address to the external programmer according to the address sent by the external programmer;

When the microcontroller receives the write command, the data to be written is written into the corresponding area of the microcontroller according to the address sent by the external programmer and the data to be written.

In some embodiments of the present application, the data protocol between the microcontroller and the external programmer is consistent with the programming protocol of the EEPROM.

In some embodiments of the present application, the external programmer and the microcontroller are reset, so as to pull down the reset signal when the programmer is working, so that the microcontroller does not work.

In some embodiments of the present application, the DATAFLASH space is an area for implementing data storage.

By applying the above technical solutions, in an air conditioner including an external programmer and a microcontroller, the microcontroller is configured to: after the MCU receives the read command, according to the address sent by the external programmer, The data corresponding to the address is returned to the external programmer; when the MCU receives the write command, the data to be written is written into the data according to the address sent by the external programmer and the data to be written In the corresponding area of MCU, so as to improve the versatility of MCU programming produced by various manufacturers and reduce costs.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

1 shows a schematic diagram of a data interaction mode of an external eeprom in an embodiment of the present invention;

FIG. 2 is a schematic diagram showing a data interaction mode of a built-in storage space of an MCU in an embodiment of the present invention

FIG. 3 shows a schematic flowchart of a method for programming an internal storage space of an air conditioner microcontroller according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more.

An embodiment of the present application provides an air conditioner, including:

External programmer, to exchange data with the air conditioner MCU through IIC;

The MCU microcontroller is provided with a DATAFLASH space, and the space is used for parameter storage;

The MCU, is configured to:

After the MCU receives the read command, it returns the data corresponding to the address to the external programmer according to the address sent by the external programmer;

When the MCU receives the write command, the data to be written is written into the corresponding area of the MCU according to the address sent by the external programmer and the data to be written.

In this embodiment, as described in the background art, in the air-conditioning industry, an external storage medium is usually used to store some data, and the stored data may include operation information, model information, protection status data, etc., and the MCU reads these data by reading these data. Data, with its own program to achieve product functions. In the past, the external eeprom was usually used as the storage medium. Because the eeprom design side uses the IIC communication method for data programming and reading, the controller chip (MCU, etc.) and the eeprom also use this method for data interaction.

However, with the development of the MCU, the function of increasing the internal storage space has been added, which can replace the original eeprom of the air conditioner and store the operating data required by the air conditioner. This does not change the function and overall software implementation form of the whole air conditioner, at the same time, it can reduce components such as eeprom IC and reduce product cost.

MCU has its own unique programming system, including programming tools, programming ports and programming methods, etc., which is more complicated than eeprom's IIC programming method. The MCU programming system is completely inconsistent with the previous eeprom programming system, that is, it is not compatible with the current production, after-sales, etc., and the compatibility is poor. Using the MCU programming system can realize the reading and writing of its internal storage space, but the MCU programming system is usually more complicated and the cost is higher. At the same time, the design of each MCU manufacturer is different, and its programming system is also different, which is difficult to be compatible, that is, the general-purpose type is very poor.

As shown in Figure 1, when the external eeprom was used as a storage unit before, the external writer can read and write data to the eeprom through the programming terminal, and the controller directly reads the data inside the eeprom for the air conditioner when it is working. operation. The IIC communication method is used between the programming terminal and the EEPROM, as well as between the EEPROM and the MCU, and there is no data exchange between the external programmer and the MCU. In this application, without changing the original hardware circuit, through the software design of the MCU, the direct data interaction between the MCU and the external programmer is realized. As shown in Figure 2, the DATAFLASH space inside the MCU has data storage, which can replace the external eeprom to realize the function of parameter storage. The change of the storage method brings about the change of the programming method. In terms of hardware, the eeprom chip is removed and the internal MCU is used. DATAFLASH as a replacement, but the circuit around the eeprom remains unchanged.

In the external eeprom solution, both the MCU and the external programmer are the master, and the eeprom chip is the slave. The master initiates read and write commands, and the slave executes them. When reading data, the host sends the read command and address to the slave, and the eeprom chip returns the data of the corresponding address to the host as a slave. When writing data, the host sends the write command, the address and the data of the corresponding address to the slave, and the eeprom writes the corresponding data in the internal specified address area according to the command. Under the built-in DATAFLASH scheme, the external writer is still the host, but the MCU Become a slave, the MCU has been in a state of waiting for instructions. When reading data, the host sends the read command and address to the slave. After receiving the command, the MCU chip returns the data of the corresponding address to the host according to the address mapping. When writing data, the host sends the write command, the address and the data of the corresponding address to the slave. After the MCU chip receives the command, it writes the corresponding data in the internal specified address area according to the address mapping.

In order to implement programming to the internal storage space of the microcontroller, in some embodiments of the present application, the data protocol between the microcontroller and the external programmer is consistent with the programming protocol of the EEPROM.

In this embodiment, the port of the MCU should use the IIC communication mode to directly interact with the external programmer, and the communication protocol is completely consistent with the programming protocol of eeprom.

In order to program the internal storage space of the microcontroller, in some embodiments of the present application, the external programmer and the microcontroller are reset, so as to pull down the reset when the programmer is working signal to disable the microcontroller.

In this embodiment, the effective level range of the Eeprom is relatively wide, and the level of a wide voltage range can be identified, usually more than 2V. However, the MCU has strict voltage requirements. At present, MCU chips in the industry usually have two power supply specifications: 3.3V and 5V. Usually, the 5V chip recognizes more than 4V, and the 3.3V chip can only recognize 2.7V~3.6V. The voltage between the two chips cannot be universal, otherwise there will be a risk of not being able to recognize normal signals or burning the MCU chip.

When the external eeprom stores data, because there are two hosts, the programmer and the MCU, in order to prevent the two hosts from working at the same time, the general practice is to connect the MCU reset port on the hardware ground of the programmer, and send the reset signal when the programmer is working. Pull low to make the MCU not work, so that only one host is working in any case, to ensure normal communication to the eeprom.

In order to realize programming the internal storage space of the microcontroller, in some embodiments of the present application, the DATAFLASH space is an area for realizing data storage.

In this embodiment, the above-mentioned DATAFLASH is a naming method; it can be an area that directly implements the data storage function, or other areas inside the MCU that can implement this function, and can be opened up in the spare RAM or ROM interval An area with data storage capabilities.

By applying the above technical solutions, in an air conditioner including an external programmer and a microcontroller, the microcontroller is configured to: after the MCU receives the read command, according to the address sent by the external programmer, The data corresponding to the address is returned to the external programmer; when the MCU receives the write command, the data to be written is written into the data according to the address sent by the external programmer and the data to be written In the corresponding area of MCU, so as to improve the versatility of MCU programming produced by various manufacturers and reduce costs.

In order to further illustrate the technical idea of the present invention, the technical solutions of the present invention are now described with reference to specific application scenarios.

An embodiment of the present application provides a method for programming the internal storage space of an air conditioner microcontroller, which is applied to an air conditioner including an external programmer and a microcontroller. As shown in FIG. 3 , the method includes:

Step S201, after receiving the read command, the microcontroller returns the data corresponding to the address to the external programmer according to the address sent by the external programmer.

Step S202, when the microcontroller receives a write command, the data to be written is written into a corresponding area of the microcontroller according to the address sent by the external programmer and the data to be written.

In order to implement programming to the internal storage space of the microcontroller, in some embodiments of the present application, the data protocol between the microcontroller and the external programmer is consistent with the programming protocol of the EEPROM.

In this embodiment, the port of the MCU should use the IIC communication mode to directly interact with the external programmer, and the communication protocol is completely consistent with the programming protocol of eeprom.

In order to program the internal storage space of the microcontroller, in some embodiments of the present application, the external programmer and the microcontroller are reset, so as to pull down the reset when the programmer is working signal to disable the microcontroller.

In this embodiment, the effective level range of the Eeprom is relatively wide, and the level of a wide voltage range can be identified, usually more than 2V. However, the MCU has strict voltage requirements. At present, MCU chips in the industry usually have two power supply specifications: 3.3V and 5V. Usually, the 5V chip recognizes more than 4V, and the 3.3V chip can only recognize 2.7V~3.6V. The voltage between the two chips cannot be universal, otherwise there will be a risk of not being able to recognize normal signals or burning the MCU chip.

When the external eeprom stores data, because there are two hosts, the programmer and the MCU, in order to prevent the two hosts from working at the same time, the general practice is to connect the MCU reset port on the hardware ground of the programmer, and send the reset signal when the programmer is working. Pull low to make the MCU not work, so that only one host is working in any case, to ensure normal communication to the eeprom.

In order to realize programming the internal storage space of the microcontroller, in some embodiments of the present application, the DATAFLASH space is an area for realizing data storage.

In this embodiment, the above-mentioned DATAFLASH is a naming method; it can be an area that directly implements the data storage function, or other areas inside the MCU that can implement this function, and can be opened up in the spare RAM or ROM interval An area with data storage capabilities.

In order to replace the external eeprom with the internal space of the MCU, a programming tool is also developed in this solution. Its main feature is that it can adjust the voltage and the signal of the reset port, which can be realized by dialing codes or shorting terminals. It can not only ensure the programming of the external eeprom, but also realize the programming of the internal storage area of the MCU, and at the same time, it can distinguish the voltage of each chip.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (9)

1. An air conditioner, comprising:

the external recorder performs data interaction with the air conditioner MCU through the IIC;

the MCU microcontroller is provided with DATAFLASH space, and the space is used for storing parameters;

the MCU configured to:

when the MCU receives a read command, returning data corresponding to the address to the external burner according to the address sent by the external burner;

and when the MCU receives a write command, writing the data to be written into a corresponding area of the MCU according to the address sent by the external burner and the data to be written.

2. The air conditioner of claim 1, wherein a data protocol between the microcontroller and the external burner is consistent with a programming protocol of an EEPROM.

3. The air conditioner as claimed in claim 1, wherein the reset of the external burner and the microcontroller is performed to pull down the reset signal when the burner is operated, so that the microcontroller does not operate.

4. The air conditioner as claimed in claim 1, wherein said DATAFLASH space is an area for implementing data storage.

5. A method for burning an internal storage space of a microcontroller of an air conditioner is characterized by being applied to the air conditioner comprising an external burner and the microcontroller, and comprises the following steps:

when the microcontroller receives a read command, returning data corresponding to the address to the external burner according to the address sent by the external burner;

and when the microcontroller receives a write command, writing the data to be written into a corresponding area of the microcontroller according to the address sent by the external burner and the data to be written.

6. The method of claim 5, wherein a data protocol between the microcontroller and the external burner is consistent with a programming protocol of an EEPROM.

7. The method of claim 5, wherein the reset of the external burner and the microcontroller is performed to pull down the reset signal when the burner is operating, so that the microcontroller does not operate.

8. The method of claim 5, the DATAFLASH space being an area for implementing data storage.

9. A burning tool for an internal storage space of an air conditioner microcontroller is applied to the burning method for the internal storage space of the air conditioner microcontroller according to claims 5-8 and used for adjusting voltage and signals of a reset port.

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