CN116938989A - Remote realization method of TFT-LCD display controller based on digital electronic technology cloud platform - Google Patents
Remote realization method of TFT-LCD display controller based on digital electronic technology cloud platform Download PDFInfo
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- CN116938989A CN116938989A CN202310676479.XA CN202310676479A CN116938989A CN 116938989 A CN116938989 A CN 116938989A CN 202310676479 A CN202310676479 A CN 202310676479A CN 116938989 A CN116938989 A CN 116938989A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 16
- 239000010409 thin film Substances 0.000 claims description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 5
- CTPDSKVQLSDPLC-UHFFFAOYSA-N 2-(oxolan-2-ylmethoxy)ethanol Chemical compound OCCOCC1CCCO1 CTPDSKVQLSDPLC-UHFFFAOYSA-N 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 238000013456 study Methods 0.000 description 1
Abstract
The invention discloses a remote realization method of a TFT-LCD display controller based on a digital electronic technology cloud platform, which comprises the following steps: s1, a digital electronic technology cloud platform is established, and the digital electronic technology cloud platform comprises a server and an operation terminal; s2, a user logs in an operation interface of the experiment console through a reservation interface at the operation terminal, and uploads an FPGA compiling program of the LCD display controller to the server; s3, inputting a control command on the operation terminal and sending the control command to the server; s4, after receiving the control command, the server sends the control command to the experimental device through the driver; and S5, after the experimental device receives the command, the LCD display screen displays according to the control command, so that remote control is realized. The invention effectively solves the defects that the display equipment has high cost, long experimental period and the like in the practice teaching scene of colleges and universities can not meet the practical teaching requirements of the existing students.
Description
Technical Field
The invention belongs to the technical field of electronic information and artificial intelligence, and relates to a remote realization method of a TFT-LCD display controller based on a digital electronic technology cloud platform.
Background
When students in college and university departments conduct LCD display control system design experiments, the students or school acquisition displays are still placed in a laboratory to conduct field operation, and experimental data are recorded manually.
The display experimental device or the operation flow of the device has the phenomena of high risk, high cost, long period and the like, the operation of the device is constrained by time, places and the like, a user cannot control a real instrument device in different places, and experimental data of the device cannot be acquired anytime and anywhere.
With the development and popularization of information technology, internet and 5G technology, a system device is connected into a cloud for remote circuit reconstruction, real experimental equipment is remotely operated in real time, the cost is low, and various potential safety hazards existing in field operation can be eliminated. However, the existing remote scheme is mostly realized by adopting a virtual simulation technology, an instrument interface is virtually formed by a software interface, and ideal experimental data is used for replacing real instrument data. However, for most scientific researches, a practical link is indispensable, and virtual simulation based on software tools cannot completely replace physical experiments.
In order to conveniently realize the control of the LCD display circuit, meet the high-level teaching resources of colleges and universities, and simultaneously solve the problems that the equipment of the teaching resources of the colleges and universities is insufficient and the inherent experimental time of a laboratory cannot meet the experimental period of students, the remote implementation method of the LCD display controller based on the digital electronic technology cloud platform is very necessary.
Disclosure of Invention
In order to solve the problems, the invention provides a TFT-LCD display controller remote implementation method based on a digital electronic technology cloud platform, which comprises an experimental device and the digital electronic technology cloud platform, wherein the experimental device comprises an FPGA core board, an SDRAM, an SD card and an LCD display screen, the digital electronic technology cloud platform comprises an operation terminal and a server,
the FPGA core board acquires information required by LCD display and reads data from SDRAM;
SDRAM is used for the FPGA core board to buffer the data output from the SD card;
the SD card is used for storing image data;
the server is connected with the experimental devices and controls the experimental devices;
the operation terminal performs user reservation experiments and interacts with an experiment platform;
the implementation method comprises the following steps:
s1, a digital electronic technology cloud platform is established, and the digital electronic technology cloud platform comprises a server and an operation terminal;
s2, a user logs in an operation interface of the experiment console through a reservation interface at the operation terminal, and uploads an FPGA compiling program of the LCD display controller to the server;
s3, inputting a control command on the operation terminal and sending the control command to the server;
s4, after receiving the control command, the server sends the control command to the experimental device through the driver;
and S5, after the experimental device receives the command, the LCD display screen displays according to the control command, so that remote control is realized.
Preferably, the digital electronic technology cloud platform further comprises a camera, and the experimental result is observed through the camera.
Preferably, the LCD display is a thin film transistor liquid crystal display.
Preferably, the LCD display screen adopts a line-field synchronous mode.
Preferably, the LCD display screen adopts a data-enabled synchronous mode.
Preferably, the step S5 specifically includes the following steps:
s51, obtaining a clock by using the ip core multiple frequency division of the FPGA core board;
s52, counting the driving clocks by using the primary counter and the secondary counter;
s53, the counting range of the sub-counter is 0-1055, representing a line scanning period, resetting in the next clock period when the sub-counter is full, and enabling the parent counter to be +1;
s54, the counting range of the master counter is 0-524, and the master counter represents one field scanning period and is cleared in the next clock period when being fully loaded;
s55, limiting the range of count values of the primary count and the secondary count by utilizing a combinational logic, and determining the range of the real valid;
s56, when the count value is in the range of the true valid, the current coordinate value needs to be returned, and the user sets the color value of RGB according to the returned coordinate value.
Preferably, the step S5 includes firstly acquiring row and field synchronization information and RGB values required by an LCD display screen, and sending the RGB values to SDRAM by an FPGA core board; the RGB values on the SDRAM are then read, the data obtained are processed, and then the image is displayed on the LCD display.
The beneficial effects of the invention at least comprise: aiming at the defects that the display equipment has high cost, long experiment period and the like and cannot meet the practical teaching requirements of the existing students in the college practice teaching scene, a solution idea is provided, and in addition, the system can effectively make up the problem that partial enterprises and public institutions cannot share and use precious and precise digital system devices to develop research, experiment, study and the like due to unbalanced economic development among areas; the system can also effectively solve the practical problem that the practical teaching process of colleges and universities is limited by time, region, safety factors and the like, and greatly improves the utilization rate of the device.
The invention adopts the digital electronic technology cloud platform, can realize the remote control of the LCD display controller, and a user can do experiments at any time and any place through a computer and a mobile phone client, so the invention is not limited by the prior time and space dimension limitation, and the operation is more convenient;
the LCD display screen equipment sharing is realized, students can share display screen experimental equipment in experiments under the limited practical teaching resources of colleges and universities, the cost is saved, and the resource utilization rate is improved.
Drawings
FIG. 1 is a flow chart of the steps of a method for remotely implementing a TFT-LCD display controller based on a digital electronics cloud platform according to an embodiment of the invention;
FIG. 2 is a block diagram of an implementation system of a method for remotely implementing a TFT-LCD display controller based on a digital electronics cloud platform according to an embodiment of the invention;
FIG. 3 is a timing diagram of LCD line display of a remote implementation method of a TFT-LCD display controller based on a digital electronics cloud platform according to an embodiment of the invention;
fig. 4 is an LCD field display timing diagram of a TFT-LCD display controller remote implementation method based on a digital electronics cloud platform according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the invention as defined by the appended claims. Further, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. The present invention will be fully understood by those skilled in the art without the details described herein.
Referring to fig. 2, the TFT-LCD display controller remote implementation system based on the digital electronics cloud platform comprises an experimental device and the digital electronics cloud platform, wherein the experimental device 100 comprises an FPGA core panel 10, an SDRAM20, an SD card 30, an LCD display screen 40, the digital electronics cloud platform comprises an operation terminal 51 and a server 52, wherein,
the FPGA core board 10 acquires information required by LCD display and reads data from the SDRAM 20;
SDRAM20 is used for FPGA core board 10 to buffer data output from SD card 30;
the SD card 30 is used to store image data;
the server 52 is connected with the experimental devices 100 and controls the experimental devices 100;
the operation terminal 51 performs user reservation experiments and interacts with an experiment platform;
referring to fig. 1, the implementation method comprises the following steps:
s1, a digital electronic technology cloud platform is established, and the digital electronic technology cloud platform comprises a server and an operation terminal;
s2, a user logs in an operation interface of the experiment console through a reservation interface at the operation terminal, and uploads an FPGA compiling program of the LCD display controller to the server;
s3, inputting a control command on the operation terminal and sending the control command to the server;
s4, after receiving the control command, the server sends the control command to the experimental device through the driver;
and S5, after the experimental device receives the command, the LCD display screen displays according to the control command, so that remote control is realized.
The digital electronic technology cloud platform further comprises a camera, and experimental results are observed through the camera.
The LCD display screen is a thin film transistor LCD display screen. The LCD display screen adopts a line-field synchronous mode or a data-enable synchronous mode.
S5 specifically comprises the following steps:
s51, obtaining a clock by using the ip core multiple frequency division of the FPGA core board;
s52, counting the driving clocks by using the primary counter and the secondary counter;
s53, the counting range of the sub-counter is 0-1055, representing a line scanning period, resetting in the next clock period when the sub-counter is full, and enabling the parent counter to be +1;
s54, the counting range of the master counter is 0-524, and the master counter represents one field scanning period and is cleared in the next clock period when being fully loaded;
s55, limiting the range of count values of the primary count and the secondary count by utilizing a combinational logic, and determining the range of the real valid;
s56, when the count value is in the range of the true valid, the current coordinate value needs to be returned, and the user sets the color value of RGB according to the returned coordinate value.
S5, firstly acquiring row and field synchronous information and RGB values required by an LCD display screen, and sending the RGB values to SDRAM by an FPGA core board; the RGB values on the SDRAM are then read, the data obtained are processed, and then the image is displayed on the LCD display.
The TFT-LCD, which is a thin film transistor liquid crystal display, is generally known as Thin Film Transistor-Liquid Crystal Display, and each pixel point displayed by the TFT-LCD is independently driven by a thin film transistor integrated behind the liquid crystal, so that the TFT-LCD has a high response speed and good image quality. This patent takes 7 inch TFT-LCD display screen ATK-7084 as an example, and Table 1 shows the corresponding interface timing chart.
Table 1 interface timing table
There are 2 common modes of TFT-LCD display: a line field sync Mode (HV Mode) and a data enable sync Mode (DE Mode), selectable via a Mode pin. FIG. 3 is a line display timing of LCD input data, we analyze several parameters important for them:
HSYNC: a line synchronization signal, which when active indicates the start of displaying a new line of data, is known to be active low by consulting the LCD data manual used.
THPW: the row sync signal width, i.e., the HSYNC signal duration. The HSYNC signal is not a pulse, but rather is asserted for a period of time, in CLK.
THB: the rows show the trailing edges in CLK.
TH: the row effective display area, i.e. the time required to display a row of data, is 800 TH in CLK if the screen resolution is 800 x 480.
THFP: the rows show the leading edges in CLK.
After the HSYNC signal is asserted, it is necessary to wait THPW+THB CLK times before receiving the true valid pixel data. After displaying a row of data, the next HSYNC signal needs to be sent out after THFP CLK times, so the time required for displaying a row is: thpw+thb+th+thfp.
A frame of image is composed of a plurality of lines, and the frame display timing of the LCD is shown in fig. 4, and we also analyze several important parameters:
VSYNC: a frame (field) sync signal, when it is active, indicates that a new frame of data is to be displayed, and a reference to the LCD data manual used will know whether the signal is active low or active high, and fig. 4 is active low.
TVPW: the frame sync signal width, i.e., the VSYNC signal duration, is in units of 1 row of time.
TVB: the frame displays the trailing edge in 1 row of time.
TV: the frame active display area, i.e. the time required to display a frame of data, is 480 lines of time for a TV if the screen resolution is 800 x 480.
TVFP: the frame shows a leading edge in 1 row of time.
The time required to display a frame is: TVPW+TVB+TV+TVFP line times, and the final calculation formula:
T＝(THPW+THB+TH+THFP)*(TVPW+TVB+TV+TVFP)
therefore, we need to know these parameters when configuring a TFT-LCD screen: THPW (LINE synchronization), THB (LINE display trailing edge), TH (LINE effective display area), THFP (LINE display leading edge), VSPW-TVPW (field synchronization), VBP-TVB (field display trailing edge), LINE-TV (field effective display area), and VFP-TVFP (field display trailing edge).
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The remote realization method of the TFT-LCD display controller based on the digital electronic technology cloud platform is characterized in that the remote realization system of the TFT-LCD display controller based on the digital electronic technology cloud platform comprises an experimental device and the digital electronic technology cloud platform, wherein the experimental device comprises an FPGA core board, an SDRAM, an SD card and an LCD display screen, the digital electronic technology cloud platform comprises an operation terminal and a server,
the FPGA core board acquires information required by LCD display and reads data from SDRAM;
SDRAM is used for the FPGA core board to buffer the data output from the SD card;
the SD card is used for storing image data;
the server is connected with the experimental devices and controls the experimental devices;
the operation terminal performs user reservation experiments and interacts with an experiment platform;
the implementation method comprises the following steps:
s1, a digital electronic technology cloud platform is established, and the digital electronic technology cloud platform comprises a server and an operation terminal;
s2, a user logs in an operation interface of the experiment console through a reservation interface at the operation terminal, and uploads an FPGA compiling program of the LCD display controller to the server;
s3, inputting a control command on the operation terminal and sending the control command to the server;
s4, after receiving the control command, the server sends the control command to the experimental device through the driver;
and S5, after the experimental device receives the command, the LCD display screen displays according to the control command, so that remote control is realized.
2. The method for remotely implementing the TFT-LCD display controller based on the digital electronics cloud platform of claim 1, wherein the digital electronics cloud platform further comprises a camera through which experimental results are observed.
3. The method for remotely implementing the TFT-LCD display controller based on the digital electronics cloud platform of claim 1, wherein the LCD display is a thin film transistor LCD display.
4. The method for remotely implementing the TFT-LCD display controller based on the digital electronics cloud platform of claim 1, wherein the LCD display screen adopts a line-field synchronization mode.
5. The method for remotely implementing a TFT-LCD display controller based on a digital electronics cloud platform of claim 1, wherein the LCD display screen employs a data enabled synchronization mode.
6. The method for remotely implementing the TFT-LCD display controller based on the digital electronics cloud platform according to claim 1, wherein the step S5 specifically comprises the following steps:
s51, obtaining a clock by using the ip core multiple frequency division of the FPGA core board;
s52, counting the driving clocks by using the primary counter and the secondary counter;
s53, the counting range of the sub-counter is 0-1055, representing a line scanning period, resetting in the next clock period when the sub-counter is full, and enabling the parent counter to be +1;
s54, the counting range of the master counter is 0-524, and the master counter represents one field scanning period and is cleared in the next clock period when being fully loaded;
s55, limiting the range of count values of the primary count and the secondary count by utilizing a combinational logic, and determining the range of the real valid;
s56, when the count value is in the range of the true valid, the current coordinate value needs to be returned, and the user sets the color value of RGB according to the returned coordinate value.
7. The method for remotely implementing the TFT-LCD display controller based on the digital electronics cloud platform according to claim 1, wherein S5 comprises first obtaining row and field synchronization information and RGB values required by the LCD display screen, and the FPGA core board sends the RGB values to the SDRAM; the RGB values on the SDRAM are then read, the data obtained are processed, and then the image is displayed on the LCD display.
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