用计算机并口模拟SPI通讯的C源程序，验证可用

M-BUS总线中的模拟电路-M-BUS the analog circuit

开发试验箱的原理图，从事硬件开发的同学可以看看 一定会获益匪浅-The development of chamber of the schematic diagram, the students engaged in hardware development will certainly benefit can look at

ARM9(AT91)开发板BUSYBOX的源码-ARM9 (AT91) development board BusyBox source code

Linux kernel - user space IPC - Netlink example-Linux kernel- user space IPC- Netlink example

PCB板制作的入门教程。对初学者来说，或许这是一本不错的免费电子书，希望能对你有用。-PCB board produced Tutorial. For beginners, this might be a good free e-book, hoping to be useful for you.

nec软盘控制器驱动代码-nec code floppy disk drive controller

DHT51湿度传感器测试程序源码，可以读取当前湿度值。-DHT51 humidity sensor test program source code, you can read the current humidity.

这个是modbus TCPIP协议client-Server端源代码， c++编程。欢迎下载、试用。

motor speed by pwm this depond on that the pwm has t on and t off and t ther is a duty cycle that = ton / t this vary the average voltage across the moto-motor speed by pwm this depond on that the pwm has t on and t off and t ther is a duty cycle that = ton/t this vary the average voltage across the moto

8位LCD与8051系列控制器的接口。完美地适用于硬件和仿真。并且很容易连接更多的硬件和扩展代码..