3*4键盘扫描程序 已加消抖功能 可以扩展为4*4~~~ 只用8个I/O口就能实现...

典型的AD和DA芯片的应用，含代码，keil编译文件，pretous仿真文件，可作为此类开发的参考-A typical chip AD and DA applications, including code, keil build file, pretous simulation files, can be used as a reference for such development

c8051f020 的扩展8255驱动数码管显示 同样是keilc啊-C8051F020-driven expansion of 8255 is a digital tube display the same keilc ah

profibus 的官方文件，朋友给的，朋友可是花钱买来的。-PROFIBUS_DP SPECIFICATION

161的读写，看看 at45db161b的程序-161 reader, a look at the procedures at45db161b

L297+L298控制步进电机，用proteus进行仿真-L297+ L298 stepper motor control, using Proteus simulation

1.将P1.0～P1.3接开关，将P1.4～P1.7接发光二极管。依据P1.0～P1.3开关状态控制P1.4~P1.7发光二极管点亮。 2.将P1.0～P1.7全部接发光二极管，开始P1.0、P1.5点亮，左循环50次后P1.1、P1.4点亮；右循环30次，循环往复。-1. P1.0- P1.3 will then switch to P1.4- P1.7 access LEDs. P1.0- P1.3 based on state control switch P1.4- P1.7 LED lights. 2. P1.0- P1.7 will take all LEDs started Schematic, P1.5 lit, the left circle after 50 P1.1 and P1.4 lit; Turn right circle 30 times repeated.

智能无线防盗报警器的设计,由AT89C51单片机控制电路、无线收发电路、DTMF（双音多频）电路、语音录放电路、电话接口电路等部分组成-Intelligent wireless burglar alarm design, by the AT89C51 single-chip control circuit, a wireless transceiver circuit, DTMF (Dual Tone Multi-Frequency) circuits, voice recording circuit, telephone interface circuit components, such as

51单片机的C语言编写的DS18B20的驱动程序，用于测试温度-51 Single-chip C-language driver DS18B20 for testing temperature

成熟电磁炉原理图，可以全面了解电磁炉工作原理及设计细节-Mature induction cooker schematic, you can fully understand the working principle and design details of the Induction Cooker

有关于pwm控制的一个例子,基于8051f020的一个例子.-Pwm control on an example, based on 8051f020 an example.