485 are way communication. Through 485 to control a group of light switches.

用ATMEL AVR单片机开发的SD/MCC卡的程式-with ATMEL AVR development of the SD/MCC card programs

ISD2560发音程序，经测试比较完全。可实现录放音功能。-ISD2560 pronunciation procedures, the comparison is totally tested. Music playback function can be realized.

电动读卡器IC卡SI4442读写模块源代码-Reader IC card SI4442 R/W Module source code

ATMEGA128的PCF8536驱动程序，对自己编写端口驱动的同志有很大的帮助！-ATMEGA128 the PCF8536 driver to prepare for their comrades-driven port of great help!

单片机的基本知识介绍！-SCM introduced to the basic knowledge!

功能： 1、作为下位机采集8255数据并将此数据通过通讯送出， 2、采集数据为BCD，先转换成二进制，处理后再转换成BCD 3、通讯采用方式3，多机通讯，上位机发地址时TB8=1，其他TB8=0 下位机SM2=1，RB8=1时产生中断后使SM2=0收发数据，结束后SM2=1-Features: 1, as under the 8255-bit machine data collection and communications sent through this data, 2, collected data for the BCD, first converted into binary, and then converted to deal with BCD 3, communication using methods 3, multi-machine communication, PC-fat address TB8 = 1, other TB8 = 0 under the digital machine SM2 = 1, RB8 = 1 when the failure to make SM2 = 0 to send and receive data, after the end of SM2 = 1

LUMINARY ARM的PWM代码（带死区控制）-LUMINARY ARM code of PWM (with dead-zone control)

单片机的自动校时器-MCU automatic school-

基于msp430单片机的1602液晶时钟程序,并带有可调日期-Based on MSP430 MCU 1602 LCD clock procedures, and with adjustable date

DS12887A是Dallas公司的一款内置电池的时钟芯片。该程序基于GCC，实现了对DS12877A的操作，包括启动，调整，读取，设置时间的操作，还带万年历哦。-DS12887A is Dallas