CN203746395U

CN203746395U - ARM+FPGA based large screen display control device

Info

Publication number: CN203746395U
Application number: CN201420027009.7U
Authority: CN
Inventors: 姜占鹏; 徐瑞; 张大宇
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2014-01-17
Filing date: 2014-01-17
Publication date: 2014-07-30
Anticipated expiration: 2024-01-17

Abstract

The utility model relates to an ARM+FPGA based large screen display control device. A previous LED large screen display system is realized by using small and medium scale integrated circuits, large in size, difficult to be debugged and not easy to modify. The ARM+FPGA based large screen display control device is composed of an ARM microprocessor (1), wherein the ARM microprocessor is connected with a FLASH memory (2), a static random access memory A (3), an RS485 converter (4), a light sensor (5), a temperature sensor (6) and an FPGA (7), the FPGA is connected with a static random access memory B (8), a static random access memory C (9) and a data buffer circuit (10), the data buffer circuit is connected with an LED display interface (11), and the LED display interface is connected with an LED display dot matrix (12). The control device provided by the utility model is applied to an LED large screen display.

Description

Large screen display control device based on ARM+FPGA

technical field:

the utility model relates to a kind of large screen display control device based on ARM+FPGA.

background technology:

at present LED large screen display is to high brightness more, more high weather resistance, higher uniformity of luminance, more giant-screen, higher reliability future development.LED display industry is just becoming the important component part of China's electronics and information industry.The progress of Large Screen Display Technology, needs data volume to be processed greatly to increase, and the frequency of system is more and more higher, and the scale of system is increasing, and the requirement of display control unit is improved constantly.LED large screen display system is in the past realized with middle small scale integrated circuit, and system bulk is large, debug difficulties, be difficult for amendment.

utility model content:

the purpose of this utility model is to provide a kind of large screen display control device based on ARM+FPGA.

above-mentioned object realizes by following technical scheme:

a kind of large screen display control device based on ARM+FPGA, its composition comprises: ARM microprocessor, described ARM microprocessor is connected with FLASH flash memories, static RAM A, RS485 converter, optical sensor, temperature sensor, FPGA respectively, described FPGA is connected with static RAM B, static RAM C, data buffer circuit respectively, described data buffer circuit is connected with light-emitting diode display interface, and described light-emitting diode display interface shows that with LED dot matrix is connected.

large screen display control device based on ARM+FPGA, described ARM microprocessor adopts 32 Embedded RISC.

beneficial effect:

the principle of work of this large screen display control device based on ARM+FPGA is as follows, host computer passes through RS232/RS485 converter by serial ports instruction set is sent to ARM microprocessor, ARM microprocessor is put into outside FLASH the instruction set receiving and is preserved, after power-off, content is not lost, two SRAM are for depositing the data of quick computing in the outside expansion of ARM simultaneously, optical sensor and temperature sensor are used for measuring extraneous light and temperature, to along with the power of light changes the brightness of display screen, demonstrate ambient temperature on display screen.FPGA completes the turntable driving process to LED screen, the Digital Logic of its inside solidification is responsible for producing screen display control signal (serial-shift clock, row latch signal, row select signal etc.), and two SRAM of its exterior arrangement read gradation data for timesharing.Meanwhile, FPGA reads data gray signal from SRAM, and after converting thereof into screen data, serial outputs in the signal data bus of corresponding color.Two SRAM of the outside expansion of FPGA have formed data buffering, switch area, adopt table tennis logic, a certain moment is to a slice storer data writing, another sheet display screen of making a gift to someone after by the conversion of fpga logic reading out data, the two switches in turn, has ensured the continuity of shielding and showing in the high speed of data.The jumbo SRAM of ARM exterior arrangement and FLASH storer, compare with traditional display panel control circuit, can support larger viewing area, stores more displaying contents, obtain better display effect.

scan drive circuit of the present utility model is made up of FPGA, mainly complete gradation data read and transmission, the generation of upper screen gradation data, the generation of shift clock, the control of luminance signal, the generation of 4 subregion latch signals, notice ARM send data function.These functions all complete in a slice FPGA, make like this volume of display control circuit plate reduce, and because FPGA function realizes with Hardware Description Language VHDL programming, can be by using VHDL language programming, come feasibility and the correctness of verification system scheme, and then realize with FPGA hardware, thereby the construction cycle can be shortened greatly, make flexible design, amendment conveniently, simultaneously FPGA is because high integration, high speed high reliability, construction cycle are short, thereby greatly improves circuit performance.

brief description of the drawings:

accompanying drawing 1 is structural representation of the present utility model.

embodiment:

embodiment 1:

a kind of large screen display control device based on ARM+FPGA, its composition comprises: ARM microprocessor 1, described ARM microprocessor respectively with FLASH flash memories 2, static RAM A, piece number: 3, RS485 converter 4, optical sensor 5, temperature sensor 6, FPGA, piece number: 7 connect, described FPGA respectively with static RAM B, piece number: 8, static RAM C, piece number: 9, data buffer circuit 10 connects, described data buffer circuit is connected with light-emitting diode display interface 11, described light-emitting diode display interface shows that with LED dot matrix 12 is connected.

embodiment 2:

large screen display control device according to embodiment 1 based on ARM+FPGA, described ARM microprocessor adopts 32 Embedded RISC.

Claims

1. the large screen display control device based on ARM+FPGA, its composition comprises: ARM microprocessor, it is characterized in that: described ARM microprocessor is connected with FLASH flash memories, static RAM A, RS485 converter, optical sensor, temperature sensor, FPGA respectively, described FPGA is connected with static RAM B, static RAM C, data buffer circuit respectively, described data buffer circuit is connected with light-emitting diode display interface, and described light-emitting diode display interface shows that with LED dot matrix is connected.

2. the large screen display control device based on ARM+FPGA according to claim 1, is characterized in that: described ARM microprocessor adopts 32 Embedded RISC.