it is usb based power switch controlled via usb based on avr microcontroller

54x54-bit Radix-4 Multiplier based on Modified Booth Algorithm

Ex001-串口printf和scanf例程(V2.0_2011-10-16)，适用于stm32fr103红牛开发板，很好的串口测试程序。

I2C driver for PIC, PICC compiler - bitbanged. Needs pull-up resistor on SCK and SDA and ports set for open collector -I2C driver for PIC, PICC compiler- bitbanged. Needs pull-up resistor on SCK and SDA and ports set for open collector

EasyARM2104开发套件串口测试源代码。-EasyARM2104 Boards serial testing source code.

一款常用的USB接口芯片pl2303的设计资料和编程方法-A common USB interface chip pl2303 design data and programming methods

IIC总线，I2C，用于LPC21XX系列的，LPC2103。用非中断的方式写的，直接用IO口控制。非常好用。-IIC Bus, I2C, for LPC21XX series, LPC2103. With non-disruptive way to write and direct use of IO population control. Very easy to use.

USART2 串行通信。对测试 USART2 串行通信和 GSM、 GPS 测试等更多有用。.，

wince下的自定义控件，自主开发的可以放大缩小，还有导航。功能很多很多 ，适合用语自制图片的保存 打开等等

GPS系统，怎样接收坐标数据，以及对数据的处理-GPS systems, how to receive coordinate data, as well as data processing

SMDK2410的开发板电路原理图,可以用orcad打开-SMDK2410 development board circuit diagram can be opened orcad