| Technology Development brings higher requirement to SAR (SyntheticAperture Radar). Radar carriers' height and speed increase results in large amount ofdata to deal, so the radar system needs to have better real-time ability, higherprocessing speed, and better reliability. 32-bit RISC has high instruction speed, lowpower, and can support embedded OS well. Embedded system based on it gives anew solution to radar control and detect.The most difficult and critical task to develop an embedded system is to buildthe software and hardware platform. This paper's objective is to build anARM-based embedded platform that can be extended and reduced easily fordifferent SAR control and detect systems, which is a valuable reference for similarembedded system developing. It has a high instruction speed, and because the newLinux2.60S core is used it supports multi-task dealing and has good real-timeability. The main research work for the paper is as follows:1. Analyze SAR control and detect requirements and give the design plan of theplatform.2. Study the architecture of ARM (Advanced RISC Machine) processor andanalyze the work principle and programming traits. Analyzed the moduleprinciples of AT91RM9200 that is based on ARM920T, and designed thehardware circuits for different modules; Gave the solution to problems found inhardware design and debug.3. Discussed the methods to realize Bootloader, and researched the commonmethod to port U-boot to AT91RM9200 platform. Further more, did developingdepending on U-boot, and gave how to add a command to the U-boot, andfinally gave the way to develop base on U-boot and application software.4. Research how to port Linux and configure the kernel, and build a root filesystem for this platform. And give a measure to optimize the Ramdisk based ext2 file system, which is proved to be effective through an experiment results.5. Design the serial communication module software; build the crossing debugtools and give how to configure the tools and use them. |
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