serial port driver in linux

pci卡驱动开发程序.该程序采用DMA方式传输，是开发高速数据采集卡的很好资料。-pci card driver development process. the program mode using DMA transfer, is to develop high-speed data acquisition card good information.

下面是一个超声波测距的程序，硬件电路由于电脑格盘已丢失，下面的代码是从样机上复制的。 硬件电路包括液晶显示、超声波的发射、超声波的接受、滤波、单片机处理。 液晶显示采用LCD1602模块，下面的代码里有液晶的驱动，可以拷贝用于它处。 超声波发射电路包括压电换能器及其支持电路，发射约44KHz的超声波。 超声波的接收电路包含一块CD40106处理芯片。技术指标大约是测距范围在三米左右，测量精度约在厘米级别。大量用于倒车雷达的测距中。-The following is a range of ultrasound procedures, the hardware circuit as a result of the computer grid plate has been lost, the following code is copied from the prototype. Hardware circuit including liquid crystal display, ultrasonic transmitter, ultrasonic acceptance filtering, single-chip processing. LCD1602 LCD module used, the following code, there are LCD drivers, you can use it to copy. Firing circuit including the piezoelectric ultrasonic transducer and its support circuitry, fired about 44KHz ultrasound. Ultrasonic receiver circuit includes a processing chip CD40106. Technical indicators for a range of about 3 meters range around the measurement precision level of about cm. Reversing a large number for the location of the radar.

单片机C语言的轻松入门，讲解的很生动，是学习的好资料-SCM C-ease of entry to explain very lively and good information to learn

石器时代3.0源代码 2008.08.27最新版 完全可编译开服！-Stone Age 3.0 source code for the latest version 2008.08.27 compiler fully open service!

这个程序是汇编的，里面有很多种类的编码芯片的解码程序，大家看看哦，很有用的！--Assembly programs. It includes decoding programs for various kinds of chips.

dm9000a,u-boot里面的驱动源代码,可以参照移植到自己的u-boot里面-dm9000a, u-boot drives inside the source code, can refer to migrate to their inside u-boot

mini gui 1.6.8 lib and source

这个项目是简单的gpio基7段与proteus文件。

采用LPC935控制的一个项目，和大家分享一下

Protel画PCB板的视频教程--Video education material of drawing PCB board by Protel.