WO2018218430A1

WO2018218430A1 - Method and system for identifying liquid crystal of different manufacturers

Info

Publication number: WO2018218430A1
Application number: PCT/CN2017/086352
Authority: WO
Inventors: 吴煌殿; 肖锋
Original assignee: 福建联迪商用设备有限公司
Priority date: 2017-05-27
Filing date: 2017-05-27
Publication date: 2018-12-06
Also published as: CN107636632B; CN107636632A

Abstract

Disclosed are a method and system for identifying liquid crystal of different manufacturers, wherein said method comprises the steps of: S1. Connecting a data line interface of a liquid crystal to a reading pin, configuring the liquid crystal data line interface as a general purpose input/output (GPIO) port and to be in a low-level output state, and configuring the state of the reading pin to be pull-down input; S2. Reading said reading pin to obtain a first value, and if the first value is valid, acquiring the connection status of a liquid crystal ID pin, and acquiring first liquid crystal information corresponding to said connection status. By using a data line interface preinstalled to a liquid crystal and connecting the liquid crystal data line interface to a reading pin, and by means of configuring the data line interface as a GPIO port and to a low-level output state, as well as configuring the state of the reading pin to pull-down input, eleven different liquid crystal manufacturers may be identified.

Description

Method and system for identifying liquid crystals of different manufacturers

[0001] The present invention relates to the field of software, and in particular, to a method and system for identifying liquid crystals of different manufacturers.

Background technique

[0002] With the continuous development of technology, more and more embedded products are used in our daily life. They are popular in small size and easy to use, and LCD screens are among many embedded products. An indispensable part, it is the most intuitive impression of this terminal product. The working principle of the liquid crystal display screen is that, after the terminal system is down, the microprocessor first writes the working parameters corresponding to the internal driving chip of the liquid crystal display screen into the driving chip, and completes the initialization of the driving chip, so as to ensure the liquid crystal display. The screen works fine.

[0003] However, as the demand for terminal products continues to increase, the market for liquid crystal display screens is also growing, and at the same time, its quality has become uneven. If a terminal product is very powerful, but it is only the display effect of the screen, or the quality is very poor, this will inevitably affect the user experience. At present, different liquid crystal display screens produced by different manufacturers use different driving chips. Due to different driving chips, different driving parameters are necessarily used. At this stage, the terminal products we see, its LCD screens are all fixed models corresponding to them. If the screen is accidentally damaged, it must be replaced by the same manufacturer, the same type of display can be used, although some terminal products It has also been compatible with two different types of LCD screens, as shown in Figure 1, by using a GPIO (General Purpose Input/Output) pin height (the LCD display pin is connected to power or ground) to determine the Which type of LCD screen is used, but this approach also has certain limitations, because the update speed of the electronic market can be described as ever-changing. After a few years, perhaps these two LCD screens have already stopped production, so users will have to Replacing new end products not only affects user usage, but is also a waste of resources. technical problem

The technical problem to be solved by the present invention is to provide a method and system capable of identifying liquid crystals of a plurality of different manufacturers, and thereby accurately loading corresponding drivers.

Problem solution Technical solution

[0005] In order to solve the above technical problem, the technical solution adopted by the present invention is:

[0006] A method for identifying liquid crystals of different manufacturers, comprising the steps of:

[0007] Sl, the liquid crystal data line interface is connected with the read pin, the liquid crystal data line interface is configured as a GPIO port and is in a low level output state, and the state of the read reading pin I is a pull-down input;

[0008] S2, reading the read pin to obtain a first value, and if the first value is valid, acquiring a connection state of the liquid crystal ID pin, and acquiring first liquid crystal information corresponding to the connection state.

Another technical solution adopted by the present invention is:

[0010] A system for identifying liquid crystals of different manufacturers, including a configuration module and an acquisition module;

[0011] the configuration module is configured to connect the data line interface of the liquid crystal to the read pin, configure the liquid crystal data line interface to be a GPIO port, and be in a low level output state, and configure the status of the read bow I pin to be a pulldown. Input

[0012] The obtaining module is configured to read the read pin to obtain a first value, and if the first value is valid, obtain a connection state of the liquid crystal ID pin, and obtain the first corresponding to the connection state. LCD information.

Advantageous effects of the invention

Beneficial effect

[0013] The beneficial effects of the present invention are:

[0014] The present invention provides a method and system for identifying liquid crystals of different manufacturers, by using the data line interface of the liquid crystal, connecting the data line interface of the liquid crystal with the reading pin I, and configuring the data line interface GPI

The 0 port is in the low level output state and the state of the configuration read pin I pin is the pull-down input, so that the data transmission and reception data function is turned off during the identification process, thereby avoiding interference to the data transmission, and the data line interface can adopt eight bits. The 8080 data bus of the output pin can add 8 to the original identification number. Therefore, the identification method provided by the present invention can identify at least 11 different liquid crystal manufacturers.

Brief description of the drawing

DRAWINGS

1 is a flow chart showing the steps of a method for identifying liquid crystals of different manufacturers according to the present invention;

2 is a schematic structural diagram of a system for identifying liquid crystals of different manufacturers according to the present invention;

3 is a flow chart showing steps of a method for identifying liquid crystals of different manufacturers according to an embodiment of the present invention;

[0018] Description of the label: [0019] 1. Configuration module; 2. Obtaining a module. detailed description

[0020] The most critical idea of the present invention is: using the data line interface of the liquid crystal to extend the LCD manufacturer identification number

[0021] Please refer to FIG. 1, a method for identifying liquid crystals of different manufacturers provided by the present invention, including the steps of:

[0022] Sl, the liquid crystal data line interface is connected with the read pin, the liquid crystal data line interface is configured as a GPIO port and is in a low level output state, and the state of the read reading pin I is a pull-down input;

[0023] S2, reading the read pin to obtain a first value, and if the first value is valid, acquiring a connection state of the liquid crystal ID pin, and acquiring first liquid crystal information corresponding to the connection state.

[0024] It can be seen from the above description that the beneficial effects of the present invention are as follows: The method for identifying liquid crystals of different manufacturers provided by the present invention is to use the data line interface of the liquid crystal to connect the data line interface and the read pin of the liquid crystal. Connected, and through the configuration of the data line interface GPIO port and in the low-level output state and the configuration read pin state is the pull-down input, so that the data transmission and reception data function is turned off during the identification process, to avoid interference to the data transmission, In addition, the data line interface can adopt the 8080 data bus of the eight-bit output pin, and the number of original identifications can be increased by eight. Therefore, the identification method provided by the present invention can identify at least 11 different liquid crystal manufacturers. If it is a 8080 data bus with a 16-bit data line, this method can identify 19 different LCD manufacturers.

[0025] Further, step S2 is specifically:

[0026] S2, reading the read pin to obtain a first value, if the first value is valid, the connection state of the ID pin of the liquid crystal is the ID of the liquid crystal, and the pin is connected to the power source to obtain the connection state. The first liquid crystal information corresponding to the power supply connection of the ID bow of the liquid crystal.

[0027] In the embodiment, as shown in FIG. 3, a correspondence table between the connection state of the ID pin and the liquid crystal information is created in advance, and when the liquid crystal data line interface is configured as a GPIO port and is in a low level output state, the read readout is configured. The state of the pin is the pull-down input 吋. If the read pin is read to obtain the first value, the LCD ID pin is connected to the power supply. The corresponding table can be used to obtain the LCD corresponding to the connection state. Information, that is, the LCD manufacturer identification code.

[0028] Further, step S2 further includes: [0029] if the first value is invalid, sequentially configuring each output pin of the data line interface to be a high level output state, and reading the read pin to obtain a corresponding value;

[0030] If the value obtained by reading the read pin is valid, the identification code of the corresponding output pin is obtained, and the second liquid crystal information corresponding to the identification code is obtained.

[0031] In the embodiment, if the ID pin of the liquid crystal is not connected to the power source, the connection mode of each output pin of the data line interface is initially determined, and if the ID pin of the liquid crystal is connected to one of the output pins, Then, when the output pin configured as the high-level output state is connected to the ID pin of the liquid crystal, the value obtained by reading the read pin is valid, so it is only necessary to sequentially configure each of the data line interfaces. The output pin is in a high-level output state. As long as the value obtained by reading the read pin is valid, it can be known which output pin is connected to the liquid crystal ID pin, and each of the output pins is Has a unique identification code to distinguish between pins.

[0032] Further, if the first value is invalid, each output pin of the data line interface is sequentially configured to be a high level output state, and the read pin is read to obtain a corresponding value; After the value obtained by the read pin is valid, the identification code of the corresponding output pin is obtained, and the second liquid crystal information corresponding to the identification code is obtained, specifically:

[0033] if the first value is invalid, configuring the first output pin of the data line interface to be a high level output state, reading the read pin to obtain a second value, and if the second value is valid, acquiring The identification code of the first output pin acquires liquid crystal information corresponding to the identification code of the first output pin; the data line interface is an 8080 bus, including a first output pin, a second output pin, and a third output lead a fourth output pin, a fifth output pin, a sixth output pin, a seventh output pin, and an eighth output pin;

[0034] if the second value is invalid, configuring the second output pin of the data line interface to be a high level output state, reading the read pin to obtain a third value, and if the third value is valid, acquiring An identification code of the second output pin, which acquires liquid crystal information corresponding to the identification code of the second output pin;

[0035] if the third value is invalid, the third output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a fourth value, and if the fourth value is valid, The identification code of the third output pin acquires liquid crystal information corresponding to the identification code of the third output pin;

[0036] if the fourth value is invalid, the fourth output pin of the configuration data line interface is a high level output state, and reading the read pin to obtain a fifth value, if the fifth value is valid, acquiring The fourth output pin Identifying the code, obtaining the liquid crystal information corresponding to the identification code of the fourth output pin;

[0037] if the fifth value is invalid, the fifth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a sixth value, and if the sixth value is valid, The identification code of the fifth output pin acquires liquid crystal information corresponding to the identification code of the fifth output pin;

[0038] if the sixth value is invalid, the sixth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a seventh value, and if the seventh value is valid, The identification code of the sixth output pin acquires liquid crystal information corresponding to the identification code of the sixth output pin;

[0039] if the seventh value is invalid, the seventh output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain an eighth value, and if the eighth value is valid, the method is obtained. The identification code of the seventh output pin acquires the liquid crystal information corresponding to the identification code of the seventh output pin;

[0040] If the eighth value is invalid, the eighth output pin of the configuration data line interface is in a high level output state, and the read pin is read to obtain a ninth value, and if the ninth value is valid, The identification code of the eighth output pin acquires the liquid crystal information corresponding to the identification code of the eighth output pin.

[0041] In the embodiment, each of the output pins of the data line interface is sequentially arranged in a high level output state by the above manner, and it can be determined whether each of the output pins is connected to the ID pin of the liquid crystal.

[0042] Further, step S2 further includes:

[0043] If the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, and the ninth value are all invalid, the state of the read bow I is configured as Pull input

[0044] reading the read pin to obtain a tenth value, if the tenth value is valid, the connection state of the liquid crystal ID pin is floating, and obtaining the third liquid crystal information corresponding to the floating state;

[0045] If the tenth value is invalid, the connection state of the ID pin of the liquid crystal is grounded, and the fourth liquid crystal information corresponding to the ground phase is obtained.

[0046] Further, before step S1, the method further includes:

[0047] determining whether to drive the liquid crystal, and if so, proceeding to step S1;

[0048] After step S2, the method further includes:

[0049] obtaining a corresponding liquid crystal manufacturer identification code according to the obtained liquid crystal information, loading a liquid crystal driver corresponding to the liquid crystal manufacturer, and operating the liquid crystal driver to drive the liquid crystal.

[0050] In the embodiment, only when the liquid crystal raft needs to be driven, the identification process provided by the solution is entered. It can be judged whether to drive the liquid crystal by determining whether to receive the instruction to drive the liquid crystal. If the liquid crystal command is received, it is necessary to drive the liquid crystal, so that the data line interface can be set as the identification port, the non-data transmission interface, because the data line is changed. The purpose of the interface is to occupy a large amount of data transmission time, so the data line interface is configured only when it is confirmed that the liquid crystal is to be driven.

[0051] Further, running the liquid crystal driver to drive the liquid crystal is specifically:

[0052] The liquid crystal data line interface is configured to send and receive data status, and the state of the read read pin I is no pull-up input and no pull-down input, and the liquid crystal driver is driven to drive the liquid crystal corresponding to the liquid crystal manufacturer.

[0053] In the embodiment, in order not to affect the normal data communication, after the identification, the liquid crystal data line interface is configured to receive and receive data status, and the status of the read pin is configured as no pull-up input and no pull-down input, and the identification is completed. process.

[0054] Referring to FIG. 2, the present invention further provides a system for identifying liquid crystals of different manufacturers, including a configuration module 1 and an acquisition module 2;

[0055] The configuration module 1 is configured to connect the data line interface of the liquid crystal to the read pin, configure the liquid crystal data line interface to be a GPIO port, and be in a low level output state, and configure the state of reading the bow I to be Pull down input;

[0056] The obtaining module 2 is configured to read the read pin to obtain a first value, and if the first value is valid, obtain a connection state of the liquid crystal ID pin, and obtain a corresponding state of the connection state. A liquid crystal message.

[0057] It can be seen from the above description that the beneficial effects of the present invention are as follows: The system for identifying liquid crystals of different manufacturers provided by the present invention is to use the data line interface of the liquid crystal to connect the data line interface and the read pin of the liquid crystal. Connected, and through the configuration of the data line interface GPIO port and in the low-level output state and the configuration read pin state is the pull-down input, so that the data transmission and reception data function is turned off during the identification process, to avoid interference to the data transmission, In addition, the data line interface can adopt the 8080 data bus of the eight-bit output pin, and the number of original identifications can be increased by eight. Therefore, the identification method provided by the present invention can identify at least 11 different liquid crystal manufacturers. If it is a 8080 data bus with a 16-bit data line, this method can identify 19 different LCD manufacturers.

[0058] Further, the acquiring module is further configured to read the read pin to obtain a first value, and if the first value is valid, the connection state of the liquid crystal ID pin is a liquid crystal ID pin and The power connection is obtained, and the first liquid crystal information corresponding to the power connection of the ID pin of the liquid crystal is obtained.

[0059] In the embodiment, as shown in FIG. 3, the correspondence table of the connection state of the ID pin and the liquid crystal information is created in advance. When the LCD data line interface is configured as a GPIO port and is in a low level output state, the state of the read pin is configured as a pull-down input. If the read pin is read to obtain the first value, the liquid crystal is The ID pin is connected to the power supply. The corresponding table can be used to obtain the liquid crystal information corresponding to the connection status, which is the LCD manufacturer identification code.

[0060] Further, the acquiring module is further configured to: if the first value is invalid, sequentially configure each output pin of the data line interface to be a high level output state, and read the read pin to obtain a corresponding If the value obtained by reading the read pin is valid, the identification code of the corresponding output pin is obtained, and the second liquid crystal information corresponding to the identification code is obtained.

[0061] In the embodiment, if the ID pin of the liquid crystal is not connected to the power source, the connection mode of each output pin of the data line interface is initially determined, and if the ID pin of the liquid crystal is connected to one of the output pins, Then, when the output pin configured as the high-level output state is connected to the ID pin of the liquid crystal, the value obtained by reading the read pin is valid, so it is only necessary to sequentially configure each of the data line interfaces. The output pin is in a high-level output state. As long as the value obtained by reading the read pin is valid, it can be known which output pin is connected to the liquid crystal ID pin, and each of the output pins is Has a unique identification code to distinguish between pins.

[0062] Further, the acquiring module is further configured to: if the first value is invalid, configure the first output pin of the data line interface to be a high level output state, and read the read pin to obtain a second The value, if the second value is valid, obtaining an identification code of the first output pin, and obtaining liquid crystal information corresponding to the identification code of the first output pin; the data line interface is an 8080 bus, including the first output pin a second output pin, a third output pin, a fourth output pin, a fifth output pin, a sixth output pin, a seventh output pin, and an eighth output pin;

[0063] if the second value is invalid, configuring the second output pin of the data line interface to be a high level output state, reading the read pin to obtain a third value, and if the third value is valid, acquiring An identification code of the second output pin, which acquires liquid crystal information corresponding to the identification code of the second output pin;

[0064] if the third value is invalid, the third output pin of the configuration data line interface is a high level output state, and reading the read pin to obtain a fourth value, if the fourth value is valid, acquiring The identification code of the third output pin acquires liquid crystal information corresponding to the identification code of the third output pin;

[0065] if the fourth value is invalid, configuring the fourth output pin of the data line interface to be a high level output state, read Taking the read pin to obtain a fifth value, if the fifth value is valid, obtaining an identification code of the fourth output pin, and obtaining liquid crystal information corresponding to the identification code of the fourth output pin;

[0066] if the fifth value is invalid, the fifth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a sixth value, and if the sixth value is valid, The identification code of the fifth output pin acquires liquid crystal information corresponding to the identification code of the fifth output pin;

[0067] if the sixth value is invalid, the sixth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a seventh value, and if the seventh value is valid, The identification code of the sixth output pin acquires liquid crystal information corresponding to the identification code of the sixth output pin;

[0068] if the seventh value is invalid, the seventh output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain an eighth value, and if the eighth value is valid, The identification code of the seventh output pin acquires the liquid crystal information corresponding to the identification code of the seventh output pin;

[0069] if the eighth value is invalid, the eighth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a ninth value, and if the ninth value is valid, the method is obtained. The identification code of the eighth output pin acquires the liquid crystal information corresponding to the identification code of the eighth output pin.

In the embodiment, each of the output pins of the data line interface is sequentially arranged in a high level output state by the above manner, and it can be determined whether each of the output pins is connected to the ID pin of the liquid crystal.

[0071] Further, the acquiring module is further configured to: if the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, and the ninth value are invalid, The state of the read pin is configured as a pull-up input;

[0072] reading the read pin to obtain a tenth value, if the tenth value is valid, the connection state of the ID pin of the liquid crystal is floating, and acquiring the third liquid crystal information corresponding to the floating state;

[0073] If the tenth value is invalid, the connection state of the ID pin of the liquid crystal is grounded, and the fourth liquid crystal information corresponding to the ground phase is obtained.

[0074] Further, the method further includes a determining module and a driving module;

[0075] the determining module is configured to determine whether to drive the liquid crystal, and if yes, enter the configuration module;

[0076] The driving module is configured to obtain a corresponding liquid crystal manufacturer identification code according to the acquired liquid crystal information, load a liquid crystal driver program corresponding to the liquid crystal manufacturer, and run the liquid crystal driver to drive the liquid crystal.

[0077] In the embodiment, only when the liquid crystal raft needs to be driven, the identification process provided by the solution is entered. It can be judged whether to drive the liquid crystal by determining whether to receive the instruction to drive the liquid crystal. If the liquid crystal command is received, it is necessary to drive the liquid crystal, so that the data line interface can be set as the identification port, the non-data transmission interface, because the data line is changed. The purpose of the interface is to occupy a large amount of data transmission time, so the data line interface is configured only when it is confirmed that the liquid crystal is to be driven.

[0078] Further, the driving module is further configured to configure a liquid crystal data line interface to receive and receive data status, and configure a status of reading the bow I pin as no pull-up input and no pull-down input, and running the liquid crystal driver to drive the corresponding LCD manufacturer's LCD.

[0079] In the embodiment, in order not to affect the normal data communication, after the identification, the liquid crystal data line interface is configured to receive and send data status, and the state of the read pin is configured as no pull-up input and no pull-down input, and the identification is completed. process.

Referring to FIG. 1-3, Embodiment 1 of the present invention is:

[0081] 1. According to the definition of the connection relationship of the ID pins in advance (as shown in Table 1), the liquid crystal manufacturer is notified to make the liquid crystal according to the definition.

[] [Table 1] Manufacturer ID foot connection

Manufacturer 1 ID pin and DO connection

Manufacturer 2 ID pin and D1 connection

Manufacturer 3 ID foot and D2 connection

Manufacturer 4 ID foot and D3 connection

Manufacturer 5 ID foot and D4 connection

Manufacturer 6 ID foot and D5 connection

Manufacturer 7 ID foot and D6 connection

Manufacturer 8 ID foot and D7 connection

Manufacturer 9 ID pin and power supply

Manufacturer 10 ID pin and ground connection

Manufacturer 11 ID pin is left floating [0082]

Table 1

[0084] 2. The liquid crystal is assembled onto the machine, and then the machine is operated to operate the method for identifying liquid crystals of different manufacturers provided by the present invention.

[0085] 3. The method for identifying liquid crystals of different manufacturers provided by the present invention is that the software first recognizes the connection manner of the ID pin before loading the liquid crystal drive. The solution takes 8 1⁄2 data lines 1) 0~07 as an example, and the steps are as follows: :

[0086] Step 1: The main control terminal configures the read pin LCD_ID as a pull-down input, connects the data line interface of the liquid crystal with the read pin, and configures the data line interface of the 8080 bus as a normal GPIO and a low level. Output, and then read the value of the above-mentioned read bow I foot LCD_ID.

[0087] Step 2: If the value of the LCD_ID is read to 1, the current LCD ID pin is connected to the power supply; if the value of the LCD_ID is not 1, the step 3 is performed;

[0088] It should be noted that the value of LCD_ID is 1, indicating that the value is valid; the value of LCD_ID is not 1, indicating that it is invalid.

[0089] Step 3: Output DO to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to the DO, and if the value of the LCD_ID is not 1, Go to step 4;

[0090] Step 4: Output D1 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to Dl, and if the value of LCD_ID is not 1, Go to step 5;

[0091] Step 5: Output D2 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to D2, if the value of LCD_ID is not 1, Go to step 6;

[0092] Step 6: Output D3 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to D3, and if the value of LCD_ID is not 1, Go to step 7;

[0093] Step 7: Output D4 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to D4, and if the value of LCD_ID is not 1, Go to step 8;

[0094] Step 8: Output D5 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to D5, and if the value of LCD_ID is not 1, Go to step 9;

[0095] Step 9: Output D6 to a high level, read the value of LCD_ID, if the value read to IjLCDJD is 1, the current LCD ID pin of the Bay 1J is connected to D6, and if the value of LCD_ID is not 1, Go to step 10;

[0096] Step 10: Output D7 to a high level, read the value of LCD_ID, and if the value of LCD_ID is read, The current LCD ID pin is connected to D7. If the value of LCD_ID is not 1, then step 11 is performed;

[0097] Step 11: Configure the LCD_ID as an input pull-up, and read the value of the LCD_ID. If the value of the LCD_ID is read, the ID of the current LCD is suspended; if the value of the LCD_ID is not 1, Then the current LCD ID pin is connected to ground.

[0098] Step 12: Configure LCD_ID as input and no pull-up, configure data line DX as 8080 bus function

, ID pin recognition is complete.

[0099] 4. The software recognizes the current LCD ID pin connection mode, and compares it with the previously defined ID pin connection mode, and knows which manufacturer the current liquid crystal is, and then loads the corresponding liquid crystal driver.

[0100] In summary, the present invention provides a method and system for identifying liquid crystals of different manufacturers by connecting a data line interface of a liquid crystal with a read pin by using a data line interface of the liquid crystal. Configure the data line interface GPIO port and the low-level output state and the status of the configuration read pin I pin as the pull-down input, so that the data transmission and reception data function is turned off during the identification process to avoid interference to the data transmission, and the data line interface The 8080 data bus of the eight-bit output pin can be used, and the number of original identifications can be increased by eight. Therefore, the identification method provided by the present invention can identify at least 11 different liquid crystal manufacturers. In the case of the 8080 data bus with sixteen data lines, this method can identify 19 different LCD manufacturers. The method and system for identifying liquid crystals of different manufacturers provided by the present invention do not require more hardware cost, and only need to connect the liquid crystal data line interface with the reading bow I to expand, and ensure the normal use of the data line.

Claims

Claim

[Claim 1] A method for identifying liquid crystals of different manufacturers, comprising the steps of:

51. Connect the data line interface of the liquid crystal to the read pin, configure the liquid crystal data line interface to be a GPIO port and be in a low level output state, and configure the state of the read bow I pin to be a pull-down input;

52. Read the read pin to obtain a first value. If the first value is valid, obtain a connection state of the liquid crystal ID bow I, and obtain first liquid crystal information corresponding to the connection state.

[Claim 2] The method for identifying liquid crystals of different manufacturers according to claim 1, wherein step S

2 is specifically:

S2, reading the read pin to obtain a first value, if the first value is valid, the connection state of the ID bow of the liquid crystal is the connection of the ID of the liquid crystal to the power source, and the connection state is obtained as liquid crystal. The ID bow I pin corresponds to the first liquid crystal information of the power connection.

[Claim 3] The method for identifying liquid crystals of different manufacturers according to claim 2, wherein: step S

2 also includes:

If the first value is invalid, each output pin of the data line interface is sequentially set to a high level output state, and the read pin is read to obtain a corresponding value; if the read bow is read, If the value is valid, the identification code of the corresponding output pin is obtained, and the second liquid crystal information corresponding to the identification code is obtained.

[Claim 4] The method for identifying liquid crystals of different manufacturers according to claim 3, wherein

If a value is invalid, each output pin of the data line interface is sequentially set to a high level output state, and the read pin is read to obtain a corresponding value; if the read pin is read, the value obtained is If it is valid, the identification code of the corresponding output pin is obtained, and the second liquid crystal information corresponding to the identification code is obtained, which is specifically:

If the first value is invalid, the first output pin of the configuration data line interface is a high level output state, the read pin is read to obtain a second value, and if the second value is valid, the first output is obtained. The identification code of the pin obtains the liquid crystal information corresponding to the identification code of the first output pin; the data line interface is an 8080 bus, and includes a first output pin, a second output pin, a third output pin, and a first a fourth output pin, a fifth output pin, a sixth output pin, a seventh output pin, and an eighth output pin; If the second value is invalid, the second output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a third value, and if the third value is valid, the second output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the second output pin;

If the third value is invalid, the third output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a fourth value, and if the fourth value is valid, the third output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the third output pin;

If the fourth value is invalid, the fourth output pin of the configuration data line interface is in a high level output state, and the read pin is read to obtain a fifth value, and if the fifth value is valid, the fourth output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the fourth output pin;

If the fifth value is invalid, the fifth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a sixth value, and if the sixth value is valid, the fifth output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the fifth output pin;

If the sixth value is invalid, the sixth output pin of the configuration data line interface is a high level output state, the read pin is read to obtain a seventh value, and if the seventh value is valid, the sixth output is obtained. The identification code of the pin, which obtains the liquid crystal information corresponding to the identification code of the sixth output pin;

If the seventh value is invalid, the seventh output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain an eighth value, and if the eighth value is valid, the seventh output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the seventh output pin;

If the eighth value is invalid, the eighth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a ninth value, and if the ninth value is valid, the eighth output is obtained. The identification code of the pin obtains the liquid crystal information corresponding to the identification code of the eighth output pin. [Claim 5] The method for identifying liquid crystals of different manufacturers according to claim 4, wherein step S

2 also includes:

If the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, and the ninth value are all invalid, the state of the read pin is configured as a pull-up input read The read pin obtains a tenth value. If the tenth value is valid, the connection state of the liquid crystal ID pin is left floating, and the third liquid crystal information corresponding to the floating state is obtained; if the tenth value is invalid, Then, the connection state of the ID pin of the liquid crystal is grounded, and the fourth liquid crystal information corresponding to the ground state is obtained.

[Claim 6] The method for identifying liquid crystals of different manufacturers according to any one of claims 1-5, wherein before step S1, the method further comprises:

Determining whether to drive the liquid crystal, and if so, proceeding to step S1;

After step S2, the method further includes:

Corresponding liquid crystal manufacturer identification code is obtained according to the obtained liquid crystal information, and a liquid crystal driver corresponding to the liquid crystal manufacturer is loaded, and the liquid crystal driver is operated to drive the liquid crystal.

[Claim 7] The method for identifying liquid crystals of different manufacturers according to claim 6, wherein the liquid crystal driver is driven to drive the liquid crystal, specifically:

The LCD data line interface is configured to send and receive data status, and the status of the read bow I pin is no pull-up input and no pull-down input, and the liquid crystal driver is driven to drive the liquid crystal corresponding to the liquid crystal manufacturer.

[Claim 8] A system for identifying liquid crystals of different manufacturers, comprising: a configuration module and an acquisition module;

The configuration module is configured to connect the data line interface of the liquid crystal to the read pin, configure the liquid crystal data line interface to be a GPIO port and be in a low level output state, and configure the state of the read pin to be a pull-down input;

The acquiring module is configured to read the read pin to obtain a first value, and if the first value is valid, obtain a connection state of the liquid crystal ID pin, and obtain first liquid crystal information corresponding to the connection state. [Claim 9] The system for identifying liquid crystals of different manufacturers according to claim 8, wherein the acquiring module is further configured to read the read pin to obtain a first value, if the first value is valid Then, the connection state of the ID pin of the liquid crystal is the ID pin of the liquid crystal connected to the power source, and the first liquid crystal information corresponding to the power connection of the ID pin of the liquid crystal is obtained.

[Claim 10] The system for identifying liquid crystals of different manufacturers according to claim 9, wherein the acquiring module is further configured to sequentially configure each output pin of the data line interface if the first value is invalid. For the high-level output state, the reading of the reading pin I is obtained to obtain a corresponding value; if the value obtained by reading the reading pin I is valid, the identification code of the corresponding output pin is obtained, and the The second liquid crystal information corresponding to the identification code.

[Claim 11] The system for identifying liquid crystals of different manufacturers according to claim 10, wherein the acquiring module is further configured to: if the first value is invalid, configure a first output pin of the data line interface as a high level output state, reading the read pin to obtain a second value, if the second value is valid, acquiring an identification code of the first output pin, and obtaining a liquid crystal corresponding to the identification code of the first output pin The data line interface is an 8080 bus, including a first output pin, a second output pin, a third output pin, a fourth output pin, a fifth output pin, a sixth output pin, and a seventh The output pin and the eighth output pin; if the second value is invalid, the second output pin of the configuration data line interface is a high level output state, and reading the read pin to obtain a third value, if When the three values are valid, the identification code of the second output pin is obtained, and the liquid crystal information corresponding to the identification code of the second output pin is obtained;

If the fourth value is invalid, the fourth output pin of the configuration data line interface is in a high level output state, and the read pin is read to obtain a fifth value, and if the fifth value is valid, the fourth output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the fourth output pin; If the fifth value is invalid, the fifth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a sixth value, and if the sixth value is valid, the fifth output is obtained. The identification code of the pin, obtaining the liquid crystal information corresponding to the identification code of the fifth output pin;

If the eighth value is invalid, the eighth output pin of the configuration data line interface is a high level output state, and the read pin is read to obtain a ninth value, and if the ninth value is valid, the eighth output is obtained. The identification code of the pin obtains the liquid crystal information corresponding to the identification code of the eighth output pin.

[Claim 12] The system for identifying liquid crystals of different manufacturers according to claim 11, wherein the acquiring module is further configured to use a second value, a third value, a fourth value, a fifth value, and a sixth The value, the seventh value, the eighth value, and the ninth value are all invalid, and the state of the read pin is configured as a pull-up input;

Reading the read pin to obtain a tenth value, if the tenth value is valid, the connection state of the liquid crystal ID pin is floating, and obtaining the third liquid crystal information corresponding to the floating state; if the tenth value is If it is invalid, the connection state of the ID pin of the liquid crystal is grounded, and the fourth liquid crystal information corresponding to the ground state is obtained.

[Claim 13] The system for identifying liquid crystals of different manufacturers according to any one of claims 8 to 12, further comprising: a judging module and a driving module;

The determining module is configured to determine whether to drive the liquid crystal, and if yes, enter a configuration module; the driving module is configured to obtain a corresponding liquid crystal manufacturer identification according to the obtained liquid crystal information The code is loaded with a liquid crystal driver corresponding to the liquid crystal manufacturer, and the liquid crystal driver is operated to drive the liquid crystal.

[Claim 14] The system for identifying liquid crystals of different manufacturers according to claim 13, wherein the driving module is further configured to configure a liquid crystal data line interface to transmit and receive data states, and configure a state of the read pin to be none. Pull-up input and no pull-down input, the liquid crystal driver is operated to drive the liquid crystal of the corresponding liquid crystal manufacturer.