a telephone warning system source /*

在C51下编写的频率计函数，可以对测得输入信号的频率-Prepared in the C51 Cymometer function, can be measured by the frequency of the input signal

MJ8游戏杆控制器 MJ8游戏杆控制器 MJ8游戏杆控制器-MJ8 joystick controller MJ8 Joystick Controller Joystick Controller MJ8 joystick controller MJ8 Joystick Controller MJ8

英飞凌C166之XC164CS的eeprom数据读写程序-XC164CS Infineon C166 of the EEPROM data read and write procedures

AT45D081/AT45DB021/AT45DB0xx驱动程序(C语言)用于大型存储的串行Flash-AT45D081/AT45DB021/AT45DB0xx Driver (C language), used in large-scale storage of Serial Flash

详细介绍RS-485/422原理与区别、元件选择、参考电路、通讯规约、程序设计等方面的应用要点，以及在产品实践中总结出的一些经验、窍门-Detail the difference between theory and RS-485/422, component selection, reference circuits, communications statute, procedures for the application of design elements, as well as practice in the products sum up the experience, know-how

功能强大的时钟中断，单片机和FIFO的接口和操作，单片机串口编程问题，纯软件单片机串口，串口通信的单片机程序，程序的多任务和资源复用举例，采用软件定时的计算方法-powerful clock interruption, the 8031 and FIFO interface and operation, the 8031 serial programming, software-only MCU, the MCU serial communication procedures, the procedures for multi-task and resource reuse, for example, regularly use the software method of calculation

8位AD转换器的使用加液晶显示,转换器是八通道并行转换器-8-bit AD converter plus the use of liquid crystal display, switches, eight-channel parallel converter

V型机LCD程序2005-11-5,V型机LCD程序2005-11-5-V-LCD procedures 2005-11-5, V-type LCD procedures 2005-11-5

编译环境：ICC AVR 6.31A 单片机：AT90S8515 PC.0出音乐信号，INT0，INT1分别接下一首、播放/暂停键 开机处于暂停状态，按下播放/暂停键开始放音，自动播放完8首，会再进入暂停状态。 所有的暂停状态都采用掉电模式。 -build environment : ICC AVR microcontroller 6.31A : AT90S8515 PC.0 musical signal INT0, INT1 respectively took one, Play/Zantingjian Boot suspended, press Play/Zantingjian start of audio, automatic broadcast End 8, will enter the state. All the suspended power-down mode is used.

炬力att7027仿真的说明程序还有开发板-att7027 simulation of the development process there plate