很小的TCP实现，可用于嵌入式或者学习

Rensas SH系列bootloader源码实例-Rensas SH Series bootloader source code examples

红外遥控逻辑分析器。原代码+电路图 - RAR 压缩文件-Infrared Remote Control logic analyzer. The original code+ Circuit- RAR compressed files

D:MyData其它我的文章C51cp1_1 est.uv2 Project File Date: 04/02/2003--D:MyDataOthersMyArticlesC51cp1_1 est.uv2 Project File Date: 04/02/2003

串口是计算机上一种非常通用设备通信的协议。大多数计算机包含两个基于RS232的串口。串口同时也是仪器仪表设备通用的通信协议；很多GPIB兼容的设备也带有RS-232口。同时，串口通信协议也可以用于获取远程采集设备的数据。串口通信的概念非常简单，串口按位（bit）发送和接收字节。尽管比按字节（byte）的并行通信慢，但是串口可以在使用一根线发送数据的同时用另一根线接收数据。它很简单并且能够实现远距离通信。比如IEEE488定义并行通行状态时，规定设备线总常不得超过20米，并且任意两个设备间的长度不得超过2米；而对于串口而言，长度可达1200米。典型地，串口用于ASCII码字符的传输。通信使用3根线完成：（1）地线，（2）发送，（3）接收。由于串口通信是异步的，端口能够在一根线上发送数据同时在另一根线上接收数据。其他线用于握手，但是不是必须的。串口通信最重要的参数是波特率、数据位、停止位和奇偶校验。对于两个进行通行的端口，这些参数必须匹配：

arm芯片Intel_pxa270驱动-LCD驱动-arm chip Intel_pxa270 drive-LCD driver

The PCF7991AT is a fully integrated Advanced Basestation IC, ABIC, designed for car immobilizer systems providing read and write access to an identification transponder. The device is intended for use with the NXP transponder family (PCF79xx) as well as other transponder types operating at 125 kHz and employing ASK, Amplitude Shift Keying for write and AM/PM for the read operation. The receiver characteristics (amplifier gain,filter cutoff frequencies) can be optimized to system and transponder requirements. The PCF7991AT IC is designed for easy integration into immobilizer read/write and read-only systems featuring a high degree of integration and very low external component count. The device integrates a powerful antenna driver/modulator, a low-noise adaptive sampling time demodulator, programmable filters/amplifier and digitizer, required to design high-performance basestations. A three wire microcontroller interface is provided for programming the PCF7991AT as well as for th

基于at89s52单片机的歌曲《草原晨曲》C程序。-SCM at89s52 songs on " Prairie morning song" C program.

在cortex-m3内核上运行ucos+ucgui，驱动TFT-LCD的源码程序，对研究ucGUI很有用-Cortex-m3 in the running kernel ucos+ ucgui, driver of TFT-LCD source procedures, useful for research ucGUI

应用背景华邦串行FLASH W25X40 读写程序范例，C语言编程。适用于华邦W25X系列,比较完整。-Winbond SPI Flash read and write source code.关键技术本程序是华邦存储芯片W25X32的驱动程序，用的是STC主芯片驱动，用C语言编程，完全可移植到其他51内核单片机主芯片上，将IO口修改即可，使用的编程软件为KEIL，已在试验板上调试过

微机原理及系统接口技术――8255开关的实现算法源程序。-Computer System Interface Technology-- 8255 switch algorithm source.