CN102163068A - Windows CE-based handheld terminal - Google Patents
Windows CE-based handheld terminal Download PDFInfo
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- CN102163068A CN102163068A CN 201110070858 CN201110070858A CN102163068A CN 102163068 A CN102163068 A CN 102163068A CN 201110070858 CN201110070858 CN 201110070858 CN 201110070858 A CN201110070858 A CN 201110070858A CN 102163068 A CN102163068 A CN 102163068A
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Abstract
The invention discloses a Windows CE-based handheld terminal. The handheld terminal comprises an embedded processor, a central processing unit (CPU) processor, a joint test action group (JTAG) protocol interface, a network interface and a universal asynchronous receiver transmitter (UART) data bus, wherein the CPU processor, the JTAG protocol interface, the network interface and the UART data bus are all connected with the embedded processor; the embedded processor is selected from an ARM9S3C2440 chip, the CPU processor is Samsung S3C2440A, and a chip adopted by the network interface is DM9000; and an embedded Windows CE operating system is used as a platform of a terminal system operating program. In the design of the handheld terminal, various hardware and software resources are comparatively selected according to the function requirement by combining the technical characteristics of hardware and software on the premise of ensuring the functions and the stability of a system; and the handheld terminal has simple structure and is economic and practical.
Description
Technical field
The present invention relates to a kind of Embedded Handhold Terminal system based on S3C2440 and Windows CE.
Background technology
Handheld terminal is meant to have data storage and computing power, can carry out secondary development, can carry out data communication with other equipment, man-machine interface is arranged, and the portable data processing terminal of demonstration and input function and powered battery characteristic particularly will be arranged.Handheld terminal is common PDA, smart mobile phone, bar code data acquisition unit, hand-held IC-card data terminal etc.
Along with the information-based and electronic progressively raising of modern war, diverse in function and light and practical hand held smart machine are subjected to the attention of various countries day by day.Because the fast development of high-performance embedded processor and operating system makes handheld terminal obtain fast development.More external countries carry out The Research of Relevant Technology and exploitation already, and this series products is provided to specific military combat occasion.U.S. army just drops into a spot of handheld terminal in Kosovo War, the equipment commanding officer uses, after 911, U.S. army can arrive region of war level commanding agency to battlefield video transmission in real time by soldier's helmet camera, can obtain street fighting street architecture thing information and be transferred to soldier's handheld terminal with unmanned plane.
Handheld terminal adopts high performance flush bonding processor and operating system technically, have special-purpose compact, purposes is fixed, operating system and characteristics such as application software code is little, execution speed is fast.Flush bonding processor is the core of embedded system, it is the hardware cell of control, backup system operation, the composition of typical case's flush bonding processor as shown in Figure 1, flush bonding processor can be divided into: the microcontroller of low side (MicroController Unit, MCU), the embedded microprocessor of middle and high end (Embedded MicroProcessor Unit, EMPU), the dsp processor of the communications field (Digital Signal Processor, DSP) and highly integrated SOC (system on a chip) (System on Chip, SoC).Typical case embedded OS basic composition as shown in Figure 2, embedded OS (EOS) is the important component part of embedded system, it is a kind of operating system software that supports Embedded Application.Effectively complex management system resource is finished operating system task such as management of process, processor scheduling, storage administration, equipment control, Interrupt Process.Common embedded OS is divided into: the VxWorks of U.S. WindRiver company, Windows CE, the uC/OS of Microsoft company and uC/OS-II, built-in Linux, Paml0S, QNX, Delta OS, Hopen OS and pSOS.
Existing handheld terminal not only costs an arm and a leg, and technology dependence is strong, and confidentiality is poor.
Summary of the invention
The present invention is directed to problems such as existing handheld terminal costs an arm and a leg, confidentiality difference, a kind of simple in structure, economical and practical handheld terminal based on Windows CE is provided.
Handheld terminal based on Windows CE of the present invention adopts following technical solution:
This handheld terminal comprises flush bonding processor, CPU processor, JTAG protocol interface, network interface and UART data bus, and CPU processor, JTAG protocol interface, network interface, UART data bus all are connected with flush bonding processor; Flush bonding processor is selected the ARM9S3C2440 chip for use, CPU processor adopting Samsung S3C2440A, and the chip that network interface adopts is DM9000; Adopt the platform of embedded Windows CE operating system as the terminal system working procedure, the customization of kernel is only selected and the relevant modular assembly of system's operation, take out redundancy section, reduce the size of kernel as far as possible, self-defined kernel configuration mode is finished the customization of kernel during exploitation, kernel after the customization has comprised all function libraries and the application component of terminal system application program operation needs, has only selected three base library classes that this terminal needs in 12 kinds of base library classes: C Libraries ﹠amp; Runtimes, Microsoft foundation Classes (MFC) and Standard SDK for Windows CE; The interior nuclear engineering that customization is good exports as the SDK installation file, develops application program based on this platform by the SDK file is installed in Embedded Visual C++4.0 again.
The design consideration functional requirement of handheld terminal of the present invention, the technical characterstic of combined with hardware and software under the prerequisite that guarantees system functionality and stability, compares selection to various hardware and software resources, and is simple in structure, economical and practical.
Description of drawings
Fig. 1 is the composition frame chart of typical flush bonding processor.
Fig. 2 is the basic composition synoptic diagram of typical embedded OS.
Fig. 3 is the hardware configuration synoptic diagram of handheld terminal of the present invention.
Fig. 4 is a Windows CE operating system nucleus customization process flow diagram.
Fig. 5 is the Windows CE kernel synoptic diagram that is customizing.
Embodiment
(1) hardware platform of exploitation handheld terminal
The design of handheld terminal at first is the selection of flush bonding processor, selects for use the ARM9S3C2440 chip to be because it has high performance and extremely low power consumption, in addition, can carry out the function expansion according to the market demand, also is a key factor of selecting for use.The S3C2440 chip is a high-performance, low price, risc processor low in energy consumption, adopts the handheld terminal volume of this chip littler, and that battery uses is more of a specified duration, processing speed is faster, system performance is greatly improved.The system hardware structure of handheld terminal of the present invention such as Fig. 3.
CPU processor: Samsung S3C2440A, dominant frequency 400MHz, the highest 533MHz; The SDRAM of 2 32M, the operational site of SDRAM system code, be characterized in power down after data promptly lose; The NAND FLASH of 128M, be used to deposit embedded OS and user program, be characterized in power down after data do not lose, when system start-up, 4KB will be loaded into automatically among 2440 the SRAM and be carried out before the NANDFlash storer, improve the toggle speed of system like this;
JTAG: carry out software download, be convenient to on-line debugging and programming.
Network interface: itself does not have network interface S3C2440, and the pattern by the extended network interface inserts for system provides Ethernet.The chip of selecting for use is DM9000.
UART: be a kind of general serial data bus, be used for asynchronous communication.This bus two-way communication can realize full duplex transmission and reception.In embedded design, UART is used for communicating with PC, comprises and monitoring debugger and other device.
(2) platform of stable embedded Windows CE operating system as the terminal system working procedure simplified in customization
Operating system (OS) is the bottom of embedded software, and selecting also, a suitable operating system of cutting is the important component part that makes up embedded OS.Platform Builder is that Microsoft offers Windows CE developer and carries out Integrated Development Environment based on embedded OS customization under the Windows CE platform.It provides all to design, create, compile, test and debug.The instrument of Windows CE operating system platform.It operates under the desktop Windows, but it is different with common Windows, can carry out as required referring to customization, for different application, can pass through interactively environment, select different modules to make up, design and customize kernel, reach and simplify purpose efficiently, compile then and debug.Windows CE operating system nucleus customization flow process such as Fig. 4.
The present invention is in conjunction with the modular characteristic of Windows CE, the customization of kernel as required, only select and the relevant modular assembly of system's operation, remove redundancy section, reduce the size of kernel as far as possible, self-defined kernel configuration mode is finished the customization of kernel during exploitation, and the kernel after the customization has comprised all function libraries and the application component of terminal system application program operation needs.Three base library classes that this terminal needs in 12 kinds of base library classes, have only been selected: C Libraries ﹠amp; Runtimes, Microsoft foundation Classes (MFC) and Standard SDK for Windows CE.Windows CE kernel such as Fig. 5 of customizing.
The interior nuclear engineering that customization is good exports as the SDK installation file, and it mainly comprises and the relevant contents such as header file, storehouse and some documents of customization platform, develops application program based on this platform by installation SDK in Embedded Visual C++4.0 again.
3, the application program of exploitation handheld terminal under Embedded Visual C++4.0 (EVC) environment
Because the handheld terminal volume is little, the inevitable requirement application software also reduces as much as possible to the consumption of system resource ground, to guarantee also that simultaneously very efficient is carried out on the highland, so the compiler that must select the program of a compiling to carry out fast in Windows CE develops software can reduce the consumption to system resource simultaneously relatively.EVC is the compiler that meets top condition most, thinks comparatively speaking, and the code of EVB is tediously long relatively, though and the VS development time go up to want fast, can the efficient of execution and the resource program of saving all is not so good as EVC.So, customize platform and develop driver, usefulness EVC Application and Development software with PB according to the demand of handheld terminal.
Based on the design of the handheld terminal of Windows CE, belong to communication technology embedded system field.The terminal that design is finished has following function: 1) reading electronic book nationality, picture; 2) storage, modification and inquiry main battle weaponry information material; 3) displaying video.Adopt the method for embedded chip design handheld terminal to compare with prior art, being based upon of the inventive method filled up on the blank basis of my army's handheld terminal design, has high military value.
The above only is the design implementation scheme of this handheld terminal; should be pointed out that technician, under the prerequisite that does not break away from the principle of the invention for this handheld terminal; can also make and improving and the function expansion, these improve and the function expansion also should be considered as protection scope of the present invention.
Claims (1)
1. handheld terminal based on Windows CE, it is characterized in that: this handheld terminal comprises flush bonding processor, CPU processor, JTAG protocol interface, network interface and UART data bus, and CPU processor, JTAG protocol interface, network interface, UART data bus all are connected with flush bonding processor; Flush bonding processor is selected the ARM9S3C2440 chip for use, CPU processor adopting Samsung S3C2440A, and the chip that network interface adopts is DM9000; Adopt the platform of embedded Windows CE operating system as the terminal system working procedure, the customization of kernel is only selected and the relevant modular assembly of system's operation, remove redundancy section, to reduce the size of kernel, self-defined kernel configuration mode is finished the customization of kernel during exploitation, kernel after the customization has comprised all function libraries and the application component of terminal system application program operation needs, has only selected three base library classes that this terminal needs in 12 kinds of base library classes: C Libraries ﹠amp; Runtimes, Microsoft foundation Classes and Standard SDK for Windows CE; The interior nuclear engineering that customization is good exports as the SDK installation file, develops application program based on this platform by the SDK file is installed in Embedded Visual C++4.0 again.
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| CN 201110070858 CN102163068A (en) | 2011-03-23 | 2011-03-23 | Windows CE-based handheld terminal |
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| CN 201110070858 CN102163068A (en) | 2011-03-23 | 2011-03-23 | Windows CE-based handheld terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591346A (en) * | 2011-12-05 | 2012-07-18 | 大连理工大学 | Small-size handheld ground monitoring system for unmanned aerial vehicle |
| CN105573734A (en) * | 2014-10-17 | 2016-05-11 | 阿里巴巴集团控股有限公司 | Method and device for providing SDK file |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257425A (en) * | 2008-03-12 | 2008-09-03 | 曹蕴明 | Portable wireless network terminal |
| CN101398679A (en) * | 2008-11-06 | 2009-04-01 | 青岛海尔软件有限公司 | Novel safety and defence information processing terminal |
| CN201550234U (en) * | 2009-11-13 | 2010-08-11 | 河北工业大学 | ARM and DSP-based image processing device |
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2011
- 2011-03-23 CN CN 201110070858 patent/CN102163068A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101257425A (en) * | 2008-03-12 | 2008-09-03 | 曹蕴明 | Portable wireless network terminal |
| CN101398679A (en) * | 2008-11-06 | 2009-04-01 | 青岛海尔软件有限公司 | Novel safety and defence information processing terminal |
| CN201550234U (en) * | 2009-11-13 | 2010-08-11 | 河北工业大学 | ARM and DSP-based image processing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591346A (en) * | 2011-12-05 | 2012-07-18 | 大连理工大学 | Small-size handheld ground monitoring system for unmanned aerial vehicle |
| CN105573734A (en) * | 2014-10-17 | 2016-05-11 | 阿里巴巴集团控股有限公司 | Method and device for providing SDK file |
| CN105573734B (en) * | 2014-10-17 | 2019-12-17 | 阿里巴巴集团控股有限公司 | method and equipment for providing SDK file |
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Application publication date: 20110824 |