C51学习非常有用的资料，包含simboard.dll ledkey.dll两个附件.

some pdf files describing about PLC concepts and components.

44B0modbus_ascii程序要的-44B0modbus_ascii procedures to the

x25045的读写源程序，可以读x5045和写x5045，软件模拟spi总线协议。-x25045 source reader, can read and write x5045 x5045, software simulation of 20 bus protocol.

ucgui的另外一些非常好的例子-ucgui another very good example

Delphi Modbus 主站控件，使用TCPCLient 用康海串口服务器通讯，下位机接到串口服务器串口上，用Modbus协议通讯。-Delphi Modbus master control, the use of TCPCLient Kang Hai serial server with the Communication, under the crew received a serial port server serial port, and with the Modbus protocol communications.

Part I We wish to display on the 7-segment displays HEX3 to HEX0 the values set by the switches SW15−0. Let the values denoted by SW15−12, SW11−8, SW7−4 and SW3−0 be displayed on HEX3, HEX2, HEX1 and HEX0, respectively. Your circuit should be able to display the digits from 0 to 9, and should treat the valuations 1010 to 1111 as don’t-cares. 1. Create a new project which will be used to implement the desired circuit on the Altera DE2 board. The intent of this exercise is to manually derive the logic functions needed for the 7-segment displays. You should use only simple VHDL assignment statements in your code and specify e

文档中包括S3C2410基础试验中VGA显示（ADS)中调试通过的源代码-documentation including test based S3C2410 VGA display (ADS) by the debug source code

nrf2401无线收发C语言程序，调试通过，用的是lpc2103的MCU-nrf2401 wireless transceiver C language programs, debugging through the use of the MCU is lpc2103

基于89C52与ICL7109的数据采集程序-89C52-based data acquisition program with the ICL7109

tcp,udp程序，对了解tcp,udp协议很有帮助-tcp, udp procedures, the understanding of tcp, udp protocol helpful