countdown for A51 source

要用ImageCraft IDE for ICCAVR开发环境。 是ucos在atmel 的AVR单片机上的移植，具备 很高的参考价值！-use IDE for ICCAVR development environment. CENTER is in the ATMEL AVR on graft, with high reference value!

一个经典的PID算法实例 很有参考价值 C语言实现-PID algorithm for a classical example of the valuable C language

IC卡操作软件:AT88SCl604芯片的操作模式有五种。它们是通过配PGM、RST、CLK等引脚信号及内部地址计数器(IAC)的状态组合来实现。 (1) 芯片复位操作： AT88SCl604有两种复位方式:上电复位和控制复位。 上电复位： 上电复位是当芯片加电时的最初状态。上电复位属于芯片 内部复位。它将使芯片内部所有的隐含标志复位到"0"状态。并使地址计数器复位到0位。 控制复位： 当CLK为低时，在RST脚上的一个下降沿将便芯片产生复位操作。 控制复位是将地址计数器复位到0位，而不影响任何内部标志的状态。-IC Card operating software : AT88SCl604 chip mode of operation there are five. They are allocated by PGM, RST, etc. pin CLK signal and the internal address counter (IAC) portfolio of the state is to be achieved. (1) chip reset operation : reduction AT88SCl604 two ways : power-on reset and reset control. Power-on reset : power-on reset when the chip is in power at the initial state. Power-on reset the internal chip is reset. It will enable all internal chip implied signs reset to "0" state. Make address counter reset to 0. Reset control : When the CLK for the low, the RST feet of a falling edge chips will have to reset operation. Reset control is to address counter reset to 0, without prejudice to any signs of internal sta

avr,单片机开发资料，usb1。1接口资料-avr, microcontroller development information, usb1. A data interface

GUI_Builder 一个使你快速设计你的Gui的软件-GUI_Builder one allows you to quickly design the software of your Gui ~ ~

单片机18b20 LCD显示 单片机18b20 LCD显示-SCM 18b20 LCD display microcontroller 18b20 LCD display microcontroller 18b20 LCD display

用IAR编写，MSP430中I2C总线的应用-IAR prepared to use, MSP430 in the application of I2C bus

单片机最小系统，两位LED数码管由串口输出接两个164驱动，Lout,Rout为左右声道输出，SET， ALT0， ALT1为三个按键，也可自己在开始的I/O定义改成你想用的I/O口；12M晶振，若用89C51则只可装下约14首歌曲，用89C52则可装下近40曲-The smallest single-chip system, the two LED digital tube by the serial output driver 164 then two, Lout, Rout output for the left and right channels, SET, ALT0, ALT1 three buttons can also be their own at the beginning of the I/O definition change you want to use the I/O port 12M crystal, if one uses a 89C51 only loaded about 14 songs can be loaded with 89C52 under near 40

Ps/2键盘源代码，为Keil构建工具，用这个程序就可以做键盘了

介绍了用RS-232串口进行开发的过程，对于刚涉及串口编程的开发人员有一定帮助-Introduction by RS-232 serial port to carry out development process, for serial programming just related to the development of staff has a certain extent, help