CN101853630A - System for driving RAM-Mapping LED display screen - Google Patents
System for driving RAM-Mapping LED display screen Download PDFInfo
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- CN101853630A CN101853630A CN201010137375A CN201010137375A CN101853630A CN 101853630 A CN101853630 A CN 101853630A CN 201010137375 A CN201010137375 A CN 201010137375A CN 201010137375 A CN201010137375 A CN 201010137375A CN 101853630 A CN101853630 A CN 101853630A
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- 238000013507 mapping Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 3
- 238000012423 maintenance Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The invention belongs to an optimized and compacted display mode for an LED (light-emitting diode) screen and particularly provides a scheme for driving an RAM-Mapping (random-access memory-mapping) LED display screen. The corresponding characters and data are displayed by a display unit through the transmission of data and instructions between an upper computer and a main control board. Based on the design idea of layering, the invention can reduce the requirements for MCUs (micro-control units), reduce the complexity of circuits, improve the stability and facilitate the maintenance at the same time.
Description
Technical field
This invention is a kind of LED display driving system of RAM mapping formula, is a kind of LED displaying scheme of novel low-cost.
Background technology
At present, along with the increase rapidly of rapid economy development and material wealth, LED shows gained popularity, and LED lamp box, LED guardrail pipe, LED display etc. almost are seen everywhere.At present, the LED display cost is higher, shows that a display screen is a control module with FPGA/CPLD often, adopts the mode of rank scanning to carry out, and utilizes special-purpose storer, the circuit structure complexity, and cost is higher.In order to reduce the cost of LED display, improve the LED display quality, the higher generalization LED display is badly in need of exploitation and is sought a kind of succinct scheme of optimizing more.
Summary of the invention
Native system adopts USB interface to finish the transmission of video data and steering order, form by master control borad, display unit and LED host computer configuration software, but display unit cascade, this type master control borad can be controlled the 16*576 point at most, by the transmission of data and instruction between host computer and the master control borad, utilize display unit to show and want data presented.
The technical scheme that its technical matters that solves native system adopts is: 51 compatible family single-chip microcomputers with cheapness are main control MCU, with RAM mapping LED display chip is the led display unit chip for driving, use USB (universal serial bus) USB and compunication, utilize the Switching Power Supply power supply, based on this hardware platform, finish the data transmission of video data, steering order and display parameter in conjunction with the computer terminal Control Software.Adopt the RAM-MAPPING scheme, make circuit structure simplify greatly, improved the stability of circuit, and be convenient to maintenance.This 51 compatible family single-chip microcomputer that uses carries jumbo RAM and EPPROM, FLASH, has saved the Hanzi font library chip, further simplifies circuit structure.The related technology of native system mainly comprises: RAM-MAPPING LED display technique, hierarchical design thought, serial ports are changeed USB technology, serial communication technology and based on the VB program design of WindowsAPI etc.
The beneficial effect of native system is: utilizes upper computer software, finishes the LED parameter configuration, and can asynchronous display message.Can comprise that LED display brightness, display font, mobile display speed, videotex are selected by the parameter that host computer is regulated and the reading and being provided with of other parameters (as temperature read with the calibration of system time etc.), online downloading supported in this invention simultaneously, is convenient to the remote upgrade of program.
Description of drawings
Below in conjunction with drawings and Examples native system is further specified.
Fig. 1 is the structure diagram of system.
Fig. 2 is native system master control borad partial circuit figure.
Fig. 3 is a native system led display unit plate circuit diagram.
Fig. 4 is that the microcontroller serial port interrupt handling routine and the serial ports of native system receives display message data function process flow diagram.
Fig. 5 is the computer terminal program interface figure of native system.
Embodiment
In Fig. 1, be the structure diagram of native system.System is a core with 51 single-chip microcomputers, utilizes the Switching Power Supply power supply, utilizes RTC that clock is provided, and utilizes USB to change serial port circuit, finishes the data transmission of master control borad and host computer, and finishes the picture and text demonstration by lattice display unit.
In Fig. 2, be native system master control borad circuit diagram.System is core MCU with (1) 51 single-chip microcomputer, (2) change serial port circuit for USB, (3) be the RTC circuit, for system provides clock, (4) be the bus driver of system, 6 altogether of (5) peripheral interfaces that drives, each interface can be lighted the 16*96 point, so this master control borad can be lighted the 16*576 point at most.This master control borad is of a size of: 123*62mm.
In Fig. 3, be native system display unit circuit figure.With (6) RAM-PAPING chip is core, obtain wanting data information displayed from MCU, and show automatically that by (7) dot matrix element the brightness of this chip controls light emitting diode is able to programme, further alleviate the MCU burden, can pass through the cascade in twos of (8) FC-10 interface between the cell board.This type led display unit is of a size of: 228*76mm.
In Fig. 4, be the microcontroller serial port interrupt handling routine and the serial ports reception display message data function process flow diagram of native system.Process flow diagram has shown that single-chip microcomputer receives the process of serial ports Interrupt Process, and promptly the master control borad process of communicating by letter with host computer after the Interrupt Process of entering, is at first preserved the display parameter that host computer transmits, and begins then to receive demonstration Chinese character image information and be written among the FLASH.After finishing transmission, system just can show the information that will show by the LED cell board according to the information that obtains, and can be moved demonstration automatically according to the length of display message.
In Fig. 5, be the LED configuration software interface of native system.Software interface can be divided into (9) videotex district, (10) connect configuring area and (11) configurations shown district.There are three text input frames in the videotex district, can import the information and the demonstration that will show respectively.When connecting configuring area and mainly containing serial ports selection, on time, unused time, computer school and temperature read composition.The configurations shown district mainly is the text box that selection will show, regulates display brightness, speed and the display font etc. of display screen.
The using method of system:
System requirements: what computing machine used is Windows operating system, and corresponding USB need install in system changes serial port drive software, and the Control Software of native system.
1, utilize the USB connecting line to connect the master control borad of computer and native system.
2, after connection is finished, confirm that the serial ports of having discerned native system in the computer system " equipment manager " changes USB device, and find this com port.
3, open the computer terminal Control Software, " the serial ports selection " that connect configuring area in (10) locates to select com port that native system uses, and clicks " connection ", hardware successful connection.
4, the input information that will show or open one section text on the computer in the text box in (9) videotex district.
5, in (11) configurations shown district font, speed and brightness of demonstration or the like are set
6, click " OK " button in (11) configurations shown district, system can be on led display unit the content in the videotex frame.
In case after 7 systems as above are provided with, just can disconnect being connected of master control borad and host computer, native system can carry out asynchronous demonstration, promptly still the information that was provided with last time is shown after the outage.
Claims (7)
1. native system utilizes single-chip microcomputer to be core, and display layer adopts the RAM-MAPPING chip to finish relatively large led array demonstration, is a kind of brand-new low-cost LED displaying scheme, and native system provides a complete set of solution.
2. can staticly show the 16*576 point by right 1 described system, can move the Chinese character image information that shows 16*16 and reach 928.
3. use general-purpose serial bus USB to carry out data transmission by right 1 described system, not only be fit to common desk-top computer, also be applicable to notebook computer, broken away from the restriction of the specific serial port resource of computing machine, expanded the range of application of native system.
4. adopted the RAM-MAPPING chip by right 1 described system, adopted the design of layering, reduced requirement, thereby significantly reduced hardware cost main control MCU.
By right 1 described system owing on hardware, significantly reduce with respect to the traditional scheme number of elements, stability is greatly enhanced, and is convenient to maintenance.
6. but adopted the mentality of designing of cascade by the led display unit of right 1 described system, simplified wiring is convenient to install.
7. the LED configuration software by right 1 described system can be provided with as display brightness, speed, font or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010137375A CN101853630A (en) | 2010-03-27 | 2010-03-27 | System for driving RAM-Mapping LED display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010137375A CN101853630A (en) | 2010-03-27 | 2010-03-27 | System for driving RAM-Mapping LED display screen |
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| Publication Number | Publication Date |
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| CN101853630A true CN101853630A (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010137375A Pending CN101853630A (en) | 2010-03-27 | 2010-03-27 | System for driving RAM-Mapping LED display screen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262847A (en) * | 2011-04-26 | 2011-11-30 | 葛晨阳 | Embedded light-emitting diode (LED) display control system and method for controlling same |
| CN102446138A (en) * | 2011-09-19 | 2012-05-09 | 清华大学 | Method for calibrating MAP data of single chip system |
| CN105975234A (en) * | 2016-05-10 | 2016-09-28 | 罗杰 | Information superposition display system |
| CN109920382A (en) * | 2019-04-02 | 2019-06-21 | 电子科技大学中山学院 | Electrophoresis electronic paper driving device |
| CN112528354A (en) * | 2020-12-21 | 2021-03-19 | 武汉光庭信息技术股份有限公司 | Simulation design method and system based on LCD (liquid crystal display) segment screen, server and medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352790Y (en) * | 2009-02-17 | 2009-11-25 | 宁波启天信息科技有限公司 | Zoning broadcast controller |
| CN101664598A (en) * | 2009-08-28 | 2010-03-10 | 苏州翊高科技有限公司 | Photoelectric chessboard and use method thereof |
-
2010
- 2010-03-27 CN CN201010137375A patent/CN101853630A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352790Y (en) * | 2009-02-17 | 2009-11-25 | 宁波启天信息科技有限公司 | Zoning broadcast controller |
| CN101664598A (en) * | 2009-08-28 | 2010-03-10 | 苏州翊高科技有限公司 | Photoelectric chessboard and use method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 《单片机与嵌入式系统应用》 20080229 无 产业技术与信息 , * |
| 《电气自动化》 20050331 曹双贵 一种基于USB单片机控制及PC机传输的电子图文屏设计 说明书第52-53页 第27卷, 第3期 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262847A (en) * | 2011-04-26 | 2011-11-30 | 葛晨阳 | Embedded light-emitting diode (LED) display control system and method for controlling same |
| CN102446138A (en) * | 2011-09-19 | 2012-05-09 | 清华大学 | Method for calibrating MAP data of single chip system |
| CN102446138B (en) * | 2011-09-19 | 2014-02-19 | 清华大学 | Method for calibrating MAP data of single chip system |
| CN105975234A (en) * | 2016-05-10 | 2016-09-28 | 罗杰 | Information superposition display system |
| CN109920382A (en) * | 2019-04-02 | 2019-06-21 | 电子科技大学中山学院 | Electrophoresis electronic paper driving device |
| CN112528354A (en) * | 2020-12-21 | 2021-03-19 | 武汉光庭信息技术股份有限公司 | Simulation design method and system based on LCD (liquid crystal display) segment screen, server and medium |
| CN112528354B (en) * | 2020-12-21 | 2022-05-10 | 武汉光庭信息技术股份有限公司 | Simulation design method and system based on LCD (liquid crystal display) segment screen, server and medium |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101006 |