一个用8255的串口编程

本程序代码可以准确地生成1－500Hz波形文件，正弦波，方波等。具体功能，下载下来，自己运行一下就知道了-the code can be accurately produce 1-500Hz waveform, sine, square, etc.. Specific functions, downloads, running about themselves will know.

The PCD5003A is a very low power decoder and pager controller specifically designed for use in new generation radio pagers. The architecture of the PCD5003A allows for flexible application in a wide variety of radio pager designs. The PCD5003A is fully compatible with “CCIR Radio paging Code No. 1” (also known as the POCSAG code) operating at data rates of 512, 1200 and 2400 bits/s using a single oscillator crystal of 76.8 kHz. In addition to the standard POCSAG sync word the PCD5003A is also capable of recognizing up to 4 User Programmable Sync Words (UPSWs). This permits the reception of both private services and POCSAG transmissions via the same radio channel. Used together with the Philips UAA2080 or UAA2082 paging receiver, the PCD5003A offers a highly sophisticated, miniature solution for the radio paging market. Control of an RF synthesizer circuit is also provided to ease alignment and channel selection

使用xmodem进行串口通讯的程序- Uses xmodem to carry on the string mouth communication the procedure

使用MsComm控件接收gps数据，解析并显示定位数据。-Mscomm gps receiver controls the use of data, analysis and display the positioning data.

MODEN串口通讯的例子挺经典的。是一个学习的好例子。-modem serial communication very classic example. The study is a good example.

串口调试精灵，可以收发ASCII和HEX两种格式的数据，简单实用。-serial debugging genies, TX ASCII and HEX both formats of data, simple and practical.

这是我做的关于考勤机的一些测试程序，请大家积极下载，很有帮助。-This is my appraisal done on the plane of some testing procedures, please download positive and helpful.

Use P/Invoke to Develop a .NET Base Class Library for Serial Device Communications

一个串口通讯_数据库存取例子程序(vc) 一个串口通讯_数据库存取例子程序(vc).-a serial communications _ examples of database access (vc), a serial communication _ examples of database access (vc).

具有高可靠性的高速连续数据采集的设计与实施方法，一篇有关数据采集的论文-highly reliable high-speed data acquisition for the design and implementation methods, a data acquisition papers