use Jupiter's four external interrupt

The widespread use of embedded systems mandates the development of industrial software design methods, i.e. computer-aided design and engineering of embedded applications using formal models (frameworks) and standardized prefabricated components, much in the same way as in other mature areas of engineering such as mechanical engineering and electronics. These guidelines have been used to develop Component-based Design of Software for Embedded Systems (COMDES). The paper gives an overview of the COMDES framework, followed by a presentation of a generic component types, such as function blocks, activities and function units. The execution of function units is discussed in the context of a newly developed execution model, i.e. timed-multitasking, which has been extended to distributed embedded systems.

ATmega48-88-168_中文说明书，是由datasheet翻译的，准确度很高，适合阅读英文datasheet比较吃力的人学习。-ATmega48-88-168_ Chinese manual is translated from the datasheet, high accuracy, suitable for reading in English datasheet relatively difficult to learn.

C8051F单片机实现网络编程，提供了一种简单的网络实现方法，值得学习。-C8051F MCU network programming, provides a simple network method worth learning.

sopc sdram 硬核的verilog 源码-sopc sdram hard core of the Verilog source code

cayman提供的pxa270 uboot 源码-cayman provided pxa270 uboot source

这是一个简单但有用的计时器，，您可以配置在循环模式或一次性模式。 你要在循环模式中设置的工作时间和暂停时间 （可选择窗体 0.1 秒到 10 天） 和准备工作到无穷大，一次性模式中您必须设置只射时间(可选择窗体 0.1 秒到 10 天）。 若要设置的时间，您必须使用电位器连接与 A/D 转换器的事先知情同意，并要设置时间的乘数必须使用跳线。 附有完整的说明。

面向实时嵌入式系统的GUI源代码-real-time embedded systems-oriented GUI source code

ADC转换器10位AVR-VOLTIMETER使用显示及定时器

用430单片机测试MMA7455三维加速度传感器程序。-MMA7455 with 430 single-chip three-dimensional acceleration sensor program.

Porting 的 uCOS-II V2.84 (目前Micrium)最新版之 Keil C51 工程,专供给 8051 上做任务调度,我已将 Code Size  改小至 4000 Byte,对于 X-Ram 的用量也仅 160 Byte(于 Keil C51 V8.08a 下编译后).我在 Main.c 内创建了两个 任务调度的 LED 闪烁程序,方便了解任务是如何被创建的,同时我也在 Keil C51 的 Project 内设好了 Simulator  模式及 Port 1 窗视可即时的观测。