| Linu@ Embedded Linux |
[Vendor: Mizi Research]
Linu@ is an Embedded Linux operating system with a GUI based on Qt/Embedded. Its efficiency and compact size make it well suited to Internet Appliance, Smart Phone, and PDA applications. Supported processors include ARM, StrongARM, MIPS, x86, and MPC. The OS requires as little as 2MB of DRAM and 4MB of Flash memory.
Linu@ overview . . . - Pure Linux -- Linu@ presents a high-level technological power that is beyond comparison with the limited technologies provided by Windows products, and its open source code offers excellent interoperability and convenient development environment.
- For Post-PC applications -- Hardware supported by Linu@ includes intelligent handheld devices with a graphic screen and stationary terminals that embrace all kinds of product areas, from smart phones to hand-held PCs and Web appliance products, which can substitute for personal computers.
- Combination of diverse technologies -- Linu@ develops such technologies as efficient power source operating systems for small devices, optimum memory management with a safe process running mode, diverse device drivers and essential application programs for the embedded Linux, and provides optimum solutions through an immediate response to the advanced technologies.
- Open development -- Linu@ provides an easily approachable embedded Linux development system to embedded Linux developers. It also offers in its kernel all kinds of functionalities that are hard to develop by the existing real-time OSs and simultaneously eliminates technological subordination, which used to be a fatal limit for Windows CE, and makes the development more open.
- Industry standard GUI -- The Qt/Embedded-based graceful graphic system provides developers with a standard GUI programming environment and efficient screen that enables users to use the system by intuition.
- Total solution -- To provide a successful launch of your products, we offer you the essentials of your product development, such as kernel porting services, device driver porting, development systems and full-set applications, as well as full-set cross platform development environment.
Linu@ Highlights . . . - A Modular Embedded Linux OS with Small Footprint
- Mobility Oriented, 32-bit, Intelligent and Connected Devices
- Reliable Flash File System to Manage Data in The Fastest Way
- Device Drivers for New Peripherals
- Serves A Complete Set of Applications for Internet Appliances
- Perfect Sync Technology
- Serves Intuitional Graphical User Interface
- Full-Set Cross Platform Develop Environment
Target CPUs . . . - ARM -- ARM7 (710, 720T, LINKUP), ARM9 (coming soon)
- StrongARM -- SA-110, SA-1110, X Scale (coming soon)
- x86 -- i386, i486, Pentium Classic, Pentium II, III, AMD, Cyrix, Geode, etc.
- MIPS -- NEC group, Toshiba group, etc.
- MPC -- coming soon
Kernel & Device Driver
Linu@ introduces safe and new technologies loaded with the newest Linux kernel 2.4 version with an MTD (Memory Technology Device) code. Aside from the basic contents provided by the Linux kernel, the device driver provided by Linu@ also includes a newly developed contents that was optimized for the embedded system. The touch panel device driver, which is essential for the input mode of LCD controllers and embedded systems, was designed to support Linux's frame buffer since every embedded system is different. To provide a safer use of the flash memory - the main storage device of the embedded systems - a JFFS (Journaling Flash File System) was applied to protect a file system from unexpected interruptions of power supply. Linu@ supports all kinds of file systems in order to provide interoperability with other operation systems. (FAT, VFAT, ext2, ReiserFS, XFS, NTFS, etc.) Linu@ supports Thread and Mutex, which comply with the POSIX standard, and OSs of other standards. The efficient Power Management Policy allows to increase the time of using hand-held devices. To provide synchronization with desk-top computers, a SyncML mode that is not affected by OS was implemented, and a mobile database system suitable to hand-held terminals was applied. To provide data exchange through outside contacts, Linu@ supports USB and Serial Port, as well as IrDA, CF-II, PCMCIA, installed CDMA modules, ADSL and BlueTooth, which will be released later.
Qt/Embedded
The customized widgets provided by Linu@ were redesigned with the basis on Qt/Embedded and can be modified according to the specifications of an embedded system, thus offering very high interoperability. (Size: 630KB - 5MB) The use of C++ language in the development process allows Windows programmers who are accustomed to Visual C++ compilers to get used to the system very easily. The supply of qvfb-like environment allows to finish almost any kind of programming in the Linux desk-top environment and create in advance a screen that will be built in a real embedded device.
C Compiler and the development environment
The development environment provided by Linu@ is almost similar to the contents provided by the desk-top Linux. What makes Linu@ different from the desk-top Linux is that cross-compilers have to be created separately depending on the CPU's type and that it uses Qt/Embedded in the real embedded systems instead of X-Window and a library with decreased capacity for small system memories. GCC, used as Linux's C Compiler, has a basic functionality of creating cross-compilers and guarantees high performance and interoperability not only in Linux but in other OSs as well. The Qt Virtual FrameBuffer, which uses Linux's Virtual FrameBuffer, provides excellent development environment that allows to emulate contents that will be created in the embedded system in the desk-top Linux environment. Developers have to develop programs for the embedded Linux just in a way they develop usual programs, and after a program is completed, they can easily rebuild embedded programs by specifying again their cross-compilers. GDB, used as the basic debugger in Linux, is provided as a debugging tool, and there is a Data Display Debugger (DDD) installed as a front-end screen.
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