用开源工具开发ARM技术的详细说明，非常详细，英文版，但日期稍微有点旧，跟最新版本软件有所出入。部分软件需要对照理解后才能安装成功-Using open source tools to develop a detailed descr iption of ARM technology, very detailed, the English version, but slightly有点旧date with the latest version of the software differs. Part of the control software needs to understand only after a successful installation