一个科室对讲系统单户对讲主机的源代码，CPU是P87LPC762，带有门禁刷卡功能...

键盘扫描程序，逐行拉低，错位相交的方法实现-Keyboard scanner, progressive degrade realize dislocation intersect method

采用AT89C2051 稳压可调电源,0~30V 两个数码显-AT89C2051 using adjustable power regulator, 0 ~ 30V digital two significant

数字指南针的设计文档，全部详尽资料，拿到就可以开发-Digital compass design documents, all detailed information can be developed to get

单片机AT89S52控制MFRC500以及MAX485实现读取IC卡信息和多机通信功能-Single-chip AT89S52 control MFRC500 and IC card reader to achieve MAX485 information and multi-machine communication

cygnal的一个应用，用SMBus实现串行通信。-of an application, with SMBus serial communications.

c8051f52X单片机的定时器的源代码-SCM c8051f52X timer source code

本模拟I2C软件包包含了I2C操作的底层子程序，使用前要定义好SCL和SDA。在标准8051模式(12 Clock)下,对主频要求是不高于12MHz-The simulation package includes I2C bottom I2C operation subroutine, before the definition of a good use of SCL and SDA. 8051 in standard mode (12 Clock), the requirements for the frequency is higher than 12MHz

用于Rabbit写Flash设备ID的程序-Rabbit write for Flash device ID procedures

51单片机的端口应用，绝对能用的，直接是开发板的程序，来下吧-51 port MCU applications, the absolute can be used, direct the development of board process to the next bar

SD卡的驱 动资料，讲述了SD卡的SPI驱动模式-SD Card Driver information about the SD card SPI-driven model