CN106354688B - Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions - Google Patents
Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions Download PDFInfo
- Publication number
- CN106354688B CN106354688B CN201610928822.5A CN201610928822A CN106354688B CN 106354688 B CN106354688 B CN 106354688B CN 201610928822 A CN201610928822 A CN 201610928822A CN 106354688 B CN106354688 B CN 106354688B
- Authority
- CN
- China
- Prior art keywords
- spi interface
- touch screen
- interface
- intelligent module
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention relates to an intelligent module which drives a TFT and a touch screen through an SPI interface and has drawing instructions, comprising a central control part, an SPI interface, a power interface and a power conversion circuit; the central control part main chip adopts an FT813Q chip; the power interface is connected with an external power supply; the power supply conversion circuit is electrically connected with the central control part, the TFT display screen and the touch screen; the SPI interface is connected with an external MCU and the FT813Q chip; the FT813Q chip is connected with the TFT display screen and the touch screen through the IO port respectively. The external interface is an SPI interface, so that the design space is saved; the TFT display screen and the touch screen can be driven simultaneously, and the MCU can directly read touch screen information through the SPI interface; in addition, the intelligent module is internally provided with drawing instructions, the drawing function can be directly realized in a mode of issuing the drawing instructions through the SPI interface, and display information does not need to be transmitted point by point.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to an intelligent module capable of driving a TFT and a touch screen through an SPI interface and carrying drawing instructions
Background
Currently, TFT displays are very widely used, mainly in a large number of electronic devices. The most commonly used interface in the TFT display screen is an RGB interface, and the interface generally needs more than 20I/O ports, and the least interface also needs more than 10I/O ports to realize the display function of the color graphics, so that more MCUs are needed to drive during application, and the cost is directly increased.
When the TFT display screen is installed below, the main purpose is to realize the display function of color graphics and simple control, so that the intelligent control function is realized by adopting a low-cost MCU with less I/O.
Disclosure of Invention
The invention provides an intelligent module which drives a TFT and a touch screen through an SPI interface and has drawing instructions, wherein an external interface is the SPI interface, so that the design space is saved; the TFT display screen and the touch screen can be driven simultaneously, and a user can directly read touch screen information through the SPI interface without separately providing the touch screen interface; in addition, the intelligent module is internally provided with drawing instructions, the drawing function can be directly realized in a mode of issuing the drawing instructions through the SPI interface, and display information does not need to be transmitted point by point.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the intelligent module is used for driving the TFT and the touch screen through the SPI interface and carrying drawing instructions, and comprises a central control part, the SPI interface, a power interface and a power conversion circuit; the central control part main chip adopts an FT813Q chip; the power interface is connected with an external power supply; the power supply conversion circuit is electrically connected with the central control part, the TFT display screen and the touch screen; the SPI interface is connected with an external MCU and the FT813Q chip; the FT813Q chip is respectively connected with the TFT display screen and the touch screen through the IO port; the working method comprises the following steps:
1) Connecting the MCU, the intelligent module and a data communication interface of the TFT display screen sequentially through data lines, wherein each part is respectively connected with an external power supply, and the FT813Q chip of the central control part determines the frequency of a display signal output to the TFT display screen and the format information of output data according to an instruction obtained from the SPI interface, wherein the display signal comprises various synchronous signals, and the frequency comprises clock frequency, line frequency and field frequency;
2) The intelligent module drives the TFT display screen to display through two modes: the first is to send each dot matrix data sent by MCU into display buffer area for display; the second is to receive drawing instructions from MCU, and directly draw the desired display graphics through intelligent module, wherein the drawing instructions comprise screen cleaning, dot drawing, line drawing, circle drawing, box drawing, filling pattern and writing instructions;
3) The command is issued through the SPI interface, so that the content currently displayed in the drawing process can be directly modified;
4) The intelligent module is simultaneously connected with and drives the touch screen, and according to user setting, position information fed back by the touch screen is converted into data in real time and stored in the intelligent module for being called by the MCU.
The power interface adopts an AMS1117-3.3 chip.
The SPI interface is a four-wire SPI interface.
Compared with the prior art, the invention has the beneficial effects that:
1) The external interface is an SPI interface, so that the design space is saved, and the production cost is reduced;
2) The TFT display screen and the touch screen can be driven simultaneously, and a user can directly read touch screen information through the SPI interface without separately providing a capacitive screen interface;
3) Drawing instructions are carried in the intelligent module, the drawing function can be directly realized in a mode of issuing the drawing instructions through an SPI interface, and display information does not need to be transmitted point by point;
4) The MCU can not only transmit display data and control the touch screen through the four-wire SPI interface, but also draw out a desired graph through a form of a transmission instruction.
Drawings
FIG. 1 is a block diagram of an intelligent module according to the present invention.
Fig. 2 is a diagram of pins of the FT813Q chip according to the present invention.
Fig. 3 is a circuit diagram of a power conversion circuit according to the invention.
Fig. 4 is a schematic diagram of a power interface according to the present invention.
FIG. 5 is a schematic diagram of the SPI interface structure according to the present invention.
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in FIG. 1, the intelligent module for driving the TFT and the touch screen through the SPI interface and carrying drawing instructions comprises a central control part, the SPI interface, a power interface and a power conversion circuit; the central control part main chip adopts an FT813Q chip; the power interface is connected with an external power supply; the power supply conversion circuit is electrically connected with the central control part, the TFT display screen and the touch screen; the SPI interface is connected with an external MCU and the FT813Q chip; the FT813Q chip is respectively connected with the TFT display screen and the touch screen through the IO port; the working method comprises the following steps:
1) Connecting the MCU, the intelligent module and a data communication interface of the TFT display screen sequentially through data lines, wherein each part is respectively connected with an external power supply, and the FT813Q chip of the central control part determines the frequency of a display signal output to the TFT display screen and the format information of output data according to an instruction obtained from the SPI interface, wherein the display signal comprises various synchronous signals, and the frequency comprises clock frequency, line frequency and field frequency;
2) The intelligent module drives the TFT display screen to display through two modes: the first is to send each dot matrix data sent by MCU into display buffer area for display; the second is to receive drawing instructions from MCU, and directly draw the desired display graphics through intelligent module, wherein the drawing instructions comprise screen cleaning, dot drawing, line drawing, circle drawing, box drawing, filling pattern and writing instructions;
3) The command is issued through the SPI interface, so that the content currently displayed in the drawing process can be directly modified;
4) The intelligent module is simultaneously connected with and drives the touch screen, and according to user setting, position information fed back by the touch screen is converted into data in real time and stored in the intelligent module for being called by the MCU.
The power interface adopts an AMS1117-3.3 chip.
The SPI interface is a four-wire SPI interface.
In the conventional technology, a user can only store a graph to be displayed in a display buffer area of an MCU, if the displayed graph needs to be modified, the displayed graph can also be calculated through a program, then data in the buffer area is modified, and finally the data are transmitted to a TFT display screen through an RGB interface. The intelligent module driving the TFT and the touch screen through the SPI interface and carrying the drawing instruction can directly modify the currently displayed content in an instruction issuing mode, and calculation, modification and transmission of a large amount of data are not needed.
The pin diagram of the FT813Q chip is shown in fig. 2; the power conversion circuit diagram is shown in fig. 3; the power interface structure is shown in fig. 4, and the SPI interface structure is shown in fig. 5.
The TFT display screen is connected with the FT813Q chip through an RGB interface, and the FT813Q chip is connected with the touch display screen through a touch screen interface, which is a conventional technology and is not described in detail herein.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (2)
1. The intelligent module is characterized by comprising a central control part, an SPI interface, a power interface and a power conversion circuit; the central control part main chip adopts an FT813Q chip; the power interface is connected with an external power supply; the power supply conversion circuit is electrically connected with the central control part, the TFT display screen and the touch screen; the SPI interface is connected with an external MCU and the FT813Q chip; the FT813Q chip is respectively connected with the TFT display screen and the touch screen through the IO port; the power supply conversion circuit adopts an AMS1117-3.3 chip; the working method comprises the following steps:
1) Connecting the MCU, the intelligent module and a data communication interface of the TFT display screen sequentially through data lines, wherein each part is respectively connected with an external power supply, and the FT813Q chip of the central control part determines the frequency of a display signal output to the TFT display screen and the format information of output data according to an instruction obtained from the SPI interface, wherein the display signal comprises various synchronous signals, and the frequency comprises clock frequency, line frequency and field frequency;
2) The intelligent module drives the TFT display screen to display through two modes: the first is to send each dot matrix data sent by MCU into display buffer area for display; the second is to receive drawing instructions from MCU, and directly draw the desired display graphics through intelligent module, wherein the drawing instructions comprise screen cleaning, dot drawing, line drawing, circle drawing, box drawing, filling pattern and writing instructions;
3) The command is issued through the SPI interface, so that the content currently displayed in the drawing process can be directly modified;
4) The intelligent module is simultaneously connected with and drives the touch screen, and according to user setting, position information fed back by the touch screen is converted into data in real time and stored in the intelligent module for being called by the MCU.
2. The intelligent module for driving TFTs and touch screen via SPI interface and having drawing instructions according to claim 1, wherein said SPI interface is a four-wire SPI interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928822.5A CN106354688B (en) | 2016-10-31 | 2016-10-31 | Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610928822.5A CN106354688B (en) | 2016-10-31 | 2016-10-31 | Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106354688A CN106354688A (en) | 2017-01-25 |
| CN106354688B true CN106354688B (en) | 2024-04-12 |
Family
ID=57865066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610928822.5A Active CN106354688B (en) | 2016-10-31 | 2016-10-31 | Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106354688B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203311820U (en) * | 2013-06-24 | 2013-11-27 | 肇庆市金鹏实业有限公司 | Color screen module adopting SPI communication |
| CN205067905U (en) * | 2015-10-26 | 2016-03-02 | 亚世光电股份有限公司 | Capacitive touch screen laser printer TFT shows control assembly |
| CN206193776U (en) * | 2016-10-31 | 2017-05-24 | 亚世光电股份有限公司 | Intelligent module of drawing for order is taken through SPI interface drive TFT and touch -sensitive screen certainly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2925692C (en) * | 2013-09-27 | 2021-09-21 | Sensel, Inc. | Touch sensor detector system and method |
-
2016
- 2016-10-31 CN CN201610928822.5A patent/CN106354688B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203311820U (en) * | 2013-06-24 | 2013-11-27 | 肇庆市金鹏实业有限公司 | Color screen module adopting SPI communication |
| CN205067905U (en) * | 2015-10-26 | 2016-03-02 | 亚世光电股份有限公司 | Capacitive touch screen laser printer TFT shows control assembly |
| CN206193776U (en) * | 2016-10-31 | 2017-05-24 | 亚世光电股份有限公司 | Intelligent module of drawing for order is taken through SPI interface drive TFT and touch -sensitive screen certainly |
Non-Patent Citations (1)
| Title |
|---|
| 基于TFT-LCD显示屏的电子相册设计;陈金立;高超;;自动化技术与应用(11);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106354688A (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107624194A (en) | For the apparatus and method for the timing controller for operating display | |
| CN104156187A (en) | Multi-screen display equipment | |
| CN102262851A (en) | Gate driver and display device having gate driver | |
| KR20130069089A (en) | Liquid crystal display device with interred touch screen and method for driving the same | |
| CN203588261U (en) | Expansion device | |
| CN203165428U (en) | TFT LCD display control system | |
| CN106935209A (en) | Display device of electronic paper and its driving method | |
| CN106354688B (en) | Intelligent module for driving TFT and touch screen through SPI interface and carrying drawing instructions | |
| CN206193776U (en) | Intelligent module of drawing for order is taken through SPI interface drive TFT and touch -sensitive screen certainly | |
| CN203038643U (en) | Color liquid crystal display module compatible with T6963 controller instruction | |
| CN211507077U (en) | LED display screen control system | |
| CN211293934U (en) | Integrated computer with multi-signal display function | |
| CN211427806U (en) | Comprehensive screen | |
| CN201716967U (en) | Color TFT-LCD liquid crystal display control device supporting images in JPEG format | |
| CN202838923U (en) | Minitype near-eye display connector drive and control circuit structure | |
| CN203055410U (en) | Driving circuit board applied to liquid crystal device | |
| CN102903720B (en) | Film transistor array substrate and liquid crystal display device thereof | |
| CN203311820U (en) | Color screen module adopting SPI communication | |
| CN202473192U (en) | Drive control panel of liquid crystal display | |
| CN202549261U (en) | TFT (Thin Film Transistor) liquid crystal display system of LNG (Liquefied Natural Gas) filling machine | |
| CN202957019U (en) | Display device | |
| CN201662804U (en) | Paperless display device for patient list in hospital | |
| CN202093787U (en) | Low-cost unit for controlling TFT module with RGB joint | |
| CN216212275U (en) | Liquid crystal display driving circuit and liquid crystal display module | |
| CN105516626A (en) | Content providing device, liquid crystal display device and display system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 114031 no.196 Qianshan Road, high tech Zone, Anshan City, Liaoning Province Applicant after: Yashi Optoelectronics (Group) Co.,Ltd. Address before: 114031 No. 196 Qianshan Road, High tech Zone, Anshan City, Liaoning Province, China Applicant before: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. Country or region before: China |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |