i2c procedures can be called directly, with 51 MCU Development.

等精度频率计，用Xilinx FPGA和51单片机实现-Precision frequency meter, etc., using Xilinx FPGA and 51 MCU

LCD液晶显示设备运行状态自动显示器单片机源程序-LCD display device running automatically displays SCM source

新华龙f020的spi0接口 控制MAX7221的数码管显示的程序，经过验证，绝对好用 -Hualong spi0 new F020

MCS-51单片机有5个中断源，其中两个是由-INT0、-INT1引脚输入的外部中断源；另外三个是内部中断源即由T0、T1的溢出引起中断和串行口发送完一个字节或接收到一个字节数据引起中断。触发外部中断有两种方式，即下降沿引起中断或低电平引起中断。当编程TCON中的ITi（i=0、1）为1时，则引起触发的方式为边沿触发方式，反之(ITi=0)为低电平触发方式。每个中断源的中断请求能否得到响应要受两级“开关”的控制，即一个总“开关”-MCS-51 single-chip has five interrupt sources, two of which are by-INT0,-INT1 pin input external interrupt source the other three internal interrupt sources from the T0, T1 overflow caused by the disruption and serial port sending or receiving end of a byte to a byte of data caused by interruption. Triggered external interrupt has two modes, namely, falling edge or low-level disruption caused disruption caused. When programming TCON in ITi (i = 0,1) for the 1:00 has been the subject of a way to trigger the way to the edge of the trigger, on the contrary (ITi = 0) for low-level trigger mode. Each interrupt source interrupt request can be subject to levels in response to

秒表程序-Stopwatch program

国人为8位机写的实时操作系统，已经有实际的产品应用。-eight people to write for the real-time operating system, have practical applications.

环境测试仪礼包 环境测试仪礼包-Environmental testing environmental testing kit bag

用89S51做的红外编码解码程序。载波用555做-89S51 do with the infrared codec procedures. Carrier to do with 555

自动检测CPU风扇的转速，并且能够在一定范围内自动控制风扇转速，对于单片机DSP爱好者有很好的参考价值-Automatically detects the CPU fan speed, and can in a certain range of automatic control fan speed, for single-chip DSP enthusiasts have a very good reference value

比较完成的FAT文件系统与单片实验,本系统利用AVR-Comparison of completed FAT file system and single-chip experiment, the system uses AVR