在44B0板子上添加IIC键盘

最简单的20键PS/2键值读取程序，PS/2的clk接INT0，data接P1_0--A simple read/write program from 20-keys PS/2 keyboard. PS/2 s clk connects to INTO and data connects to P1_0.

基于ARM7的44B0开发板的IIC测试程序，C语言编写，可以在ADS1.2上运行-ARM7-based development board 44B0 of IIC test procedure, C language, you can run ADS1.2

flash serial input queue. returns 0 on success or negative error * number otherwise-flash serial input queue. 0 succeeded the returns on ess or negative error number otherwise*

Atmega88PA，PWM程序，通过UART串口通信控制PWM，是AVR常用的程序，新手可以下载来参考一下。做四轴飞行器入门芯片也常用这个芯片和这个程序。

该代码控制 LCD 16 × 2 字符来显示文本和数字 9 的数字，这是有益的学生，想要到相似与 LPC2103 和小型项目。

calculator code ,use toshibaor nec LSI

ARM开发软件使用教程含代码S3C44B0X无操作系统-ARM to develop software using the tutorial with no operating system code S3C44B0X

S3C2440核心板原理图，已制成PCB板，并试验通过。-S3C2440 core board schematics, has been made of PCB board, and tested through.

NIOSII的经典JTAG通信程序,含所有底层源代码-JTAG classic NIOSII Communication Program

嵌入式系统讲义，某大学资深教授讲课时候的讲义，在网上也有流传，再次拿出来和大家分享-Embedded Systems lectures, a senior university professors to give lectures when the lectures, the Internet has spread to repeat and share