CN102542885A - Embedded development platform-based bootloaer device - Google Patents
Embedded development platform-based bootloaer device Download PDFInfo
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- CN102542885A CN102542885A CN2010106217184A CN201010621718A CN102542885A CN 102542885 A CN102542885 A CN 102542885A CN 2010106217184 A CN2010106217184 A CN 2010106217184A CN 201010621718 A CN201010621718 A CN 201010621718A CN 102542885 A CN102542885 A CN 102542885A
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Abstract
The invention relates to an experimental operating device, in particular to an embedded development platform-based bootloaer device. The embedded development platform-based bootloaer device comprises a serial port I, a serial port II, a liquid crystal display (LCD) connecting module, programmable keys, a power supply, a light-emitting diode (LED) lamp, a buzzer and a central processing unit, wherein the serial port I, the serial port II, the LCD connecting module, the programmable keys, the power supply, the LED lamp and the buzzer are connected with the central processing unit respectively; the other ends of the serial port I and the serial port II are connected with a personal computer (PC) respectively; and the other end of the LCD connecting module is connected with an LCD display screen. The platform is widely applied to industrial control, medical equipment, access control, point-of-sale (POS) machines, communication gateways, embedded soft moderm and the like, and the expandability and adaptability of the system are greatly improved.
Description
Technical field
The present invention relates to a kind of experimental implementation device, relate in particular to a kind of bootloaer device based on embedded development platform.
Background technology
In today of infotech high speed prosperity; Computing machine has got into epoch that are full of opportunities and challenges; Along with industry member improves constantly what Based Intelligent Control required, various informative digital intelligent product arises at the historic moment, and becomes the critical piece that replaces PC to carry out information processing.In these parts, embed microprocessor, also just become so-called embedded system.Embedded system has been dissolved in people's the life, and ubiquitous, considerably beyond the application of general purpose PC.
Present various embedded development platform, or be based on the learning board of more low-grade processor chips, can only do some simple study programmings.If the learning board of more high-grade processor chips, then interface lacks usually, and the user also can only carry out the study of related software.The large-screen lc screen that can not provide video to show usefulness simultaneously.These defectives make these development boards can't realize Embedded System Design and the study of handling to signal specific.
In the present colleges and universities course, a lot of colleges and universities are the single-chip microcomputer principle with regard to using before using 10 years also, and single-chip microcomputer progressively falls behind, and much upgrading higher requirement has not been that single-chip microcomputer can be realized.And corresponding practice course lacks more.In addition, science and technology type company is in the R&D process of relevant embedded platform experimental provision, and the level of hardware platform is very low.Development of technologies; No matter cultivate from the practice and the manipulative ability of college student; Still be aspects such as constantly weeding out the old and bring forth the new of scientific & technical corporation's product; All require aspect system design, can develop, and can in time release effective embedded system study and design platform, realize complete signal processing along with sending out of technology.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defective, and a kind of bootloaer device based on embedded development platform is provided, and it can accomplish kinds of experiments or teaching demonstration function.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: it comprises serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer, central microprocessor, and serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer are connected with central microprocessor respectively; The other end of serial ports I, serial ports II is connected with PC respectively; The other end of LCD link block connects LCD display.
Central microprocessor adopts the LPC2220 model.LPC2220 is based on 16/32 ARM7TDMI-S that supports real-time simulation and embedded tracking
TMThe drives platform that erects on the microcontroller basis of CPU.
Most of bootloader comprise two kinds of different operating modes: " start-up loading " pattern and " download " pattern, this difference is just meaningful for the developer.But see that from final user's angle the effect of bootloader is exactly to be used for the load operation system forever, and do not have so-called start-up loading pattern and the difference of downloading mode of operation.
The start-up loading pattern: this pattern is also referred to as " independently " pattern, promptly on bootloader certain solid state memory device from target machine operating system is loaded into the RAM and moves, and whole process does not have user's intervention.This pattern is the normal mode of operation of bootloader, and therefore when issuing with embedded product, bootloader must operate under this pattern.
Downloading mode: under this pattern, the bootloader on the target machine will through serial ports or network connect or other means of communication from the main frame file in download, such as: download kernel mirror image and root file system mirror image etc.Usually at first be saved in the RAM of target machine from the main frame downloaded files, write in the FLASH class solid storage device on the target machine by bootloader then by bootloader.This pattern of Bootloader is used when for the first time kernel and root file system being installed usually; In addition, later system update also can use this mode of operation of bootloader.The bootloader that works under this pattern can provide a simple command line interface to its interruption user usually.
The topmost function of Bootloader is the Bootstrap Loading kernel mirror image.But development along with embedded system; Bootloader is gradually on the basis of basic function; Expand; Bootloader can increase the plate level support to concrete system more, promptly increases the use support on some hardware module functions, to make things convenient for the developer to develop and to debug.See that from this aspect the bootloader after the function expansion can regard a small system-level code packages as virtually.
From the angle of operating system, the general objective of BootLoader is exactly correctly to call kernel to carry out.Because the realization of BootLoader depends on the architecture of CPU, so most of BootLoader all side of branch e1 and stage2 two large divisions.Depend on the code of CPU architecture, device initialize code etc. for example usually all among the stage1, and is generally all realized with assembly language, to reach to the purpose of the short and small exquisiteness of Ij; Stage2 then realizes with assembly language usually, thereby can realize more complicated function, and code can have better readability and portability.
The reason that is divided into two stages be because: (1) is based on the consideration of programming language.Stage 1 usefulness is mainly used assembly language; It mainly carries out and CPU nuclear and the closely-related work of treatment of memory device; Carrying out some necessary initial work, is some codes that depend on the CPU architecture, in order to increase efficient and because relate to the setting of coprocessor; Can only write with compilation, this part is directly carried out in FLASH; The C language that stages 2 usefulness is general is realized general flow process and some drivings of plate level is supported that this part can be copied among the RAM and carry out.(2) code has better readability and transplantability: if for identical CPU and memory device, increase the peripheral hardware support, the code in stage 1 can be safeguarded constant, only the code in stage 2 is made amendment; If will support different CPU, then foundation code only needs in the stage 1, to revise.
Serial ports I, serial ports II all adopt 9 pin RS-232 serial ports.LCD display adopts the HG1926419C model.The programming button is provided with 16.
The present invention can utilize the programmable features of this platform, on the basis that does not change hardware, carries out special-purpose embedded software developing.Utilize embedded development platform, realize the functions such as encoding and decoding, storage, transmission and demonstration to signal, LCD display can satisfy the high definition display requirement, greatly reduces system development costs, has high performance price ratio.
This platform is widely used in Industry Control, Medical Devices, access control, POS machine, communication gate, embedded soft moderm etc., has improved the extensibility and the adaptability of system greatly.
Description of drawings
Fig. 1 is a modular structure synoptic diagram of the present invention.
Embodiment
Native system comprises serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer, central microprocessor, and serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer are connected with central microprocessor respectively; The other end of serial ports I, serial ports II is connected with PC respectively; The other end of LCD link block connects LCD display.
Central microprocessor adopts the LPC2220 model.Serial ports I, serial ports II all adopt 9 pin RS-232 serial ports.LCD display adopts the HG1926419C model.The programming button is provided with 16.
Claims (5)
1. bootloaer device device based on embedded development platform; It is characterized in that; Comprise serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer, central microprocessor, serial ports I, serial ports II, LCD link block, programming button, power supply, LED lamp, hummer are connected with central microprocessor respectively; The other end of serial ports I, serial ports II is connected with PC respectively; The other end of LCD link block connects LCD display.
2. the bootloaer device device based on embedded development platform according to claim 1 is characterized in that, central microprocessor adopts the LPC2220 model.
3. the bootloaer device device based on embedded development platform according to claim 2 is characterized in that serial ports I, serial ports II all adopt 9 pin RS-232 serial ports.
4. the bootloaer device device based on embedded development platform according to claim 2 is characterized in that, LCD display adopts the HG1926419C model.
5. the bootloaer device device based on embedded development platform according to claim 3 is characterized in that, the programming button is provided with 16.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010106217184A CN102542885A (en) | 2010-12-31 | 2010-12-31 | Embedded development platform-based bootloaer device |
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| CN2010106217184A CN102542885A (en) | 2010-12-31 | 2010-12-31 | Embedded development platform-based bootloaer device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1661586A (en) * | 2005-01-21 | 2005-08-31 | 长沙科瑞捷机电技术有限公司 | PC104 embedded type computer based on ARM |
| CN201340680Y (en) * | 2008-10-16 | 2009-11-04 | 黄维翼 | USB serial port communication experiment instrument |
| CN201751923U (en) * | 2010-05-17 | 2011-02-23 | 中国海洋大学 | Experimental apparatus based on embedded development platform |
| CN202003561U (en) * | 2010-12-31 | 2011-10-05 | 青岛海尔软件有限公司 | Bootloaer device based on embedded developing platform |
| CN102254469A (en) * | 2010-05-17 | 2011-11-23 | 中国海洋大学 | Experimental device based on embedded development platform |
-
2010
- 2010-12-31 CN CN2010106217184A patent/CN102542885A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1661586A (en) * | 2005-01-21 | 2005-08-31 | 长沙科瑞捷机电技术有限公司 | PC104 embedded type computer based on ARM |
| CN201340680Y (en) * | 2008-10-16 | 2009-11-04 | 黄维翼 | USB serial port communication experiment instrument |
| CN201751923U (en) * | 2010-05-17 | 2011-02-23 | 中国海洋大学 | Experimental apparatus based on embedded development platform |
| CN102254469A (en) * | 2010-05-17 | 2011-11-23 | 中国海洋大学 | Experimental device based on embedded development platform |
| CN202003561U (en) * | 2010-12-31 | 2011-10-05 | 青岛海尔软件有限公司 | Bootloaer device based on embedded developing platform |
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Application publication date: 20120704 |