一个随机抽题程序 可以用来做演示用 还包括了定时器

51单片机对 siemens4442卡的底层驱动程序 把.rar改成.C即可-51 Singlechip siemens4442 card on the bottom of the driver. Rar changed. C can be

液晶显示器12864的805X接口程序,汉字点阵显示-the 805X interface program, Chinese characters dot matrix display

24-512copy.rar(1K)24c512及24c512以下芯片copy程序,没有芯片所以没有测试-24-512copy.rar (1K) 24c512 and 24c512 chip copy the following order, no there is no test chips

AT89C2051驱动彩显玩方块游戏，又是一款有趣的小制作，希望大家喜欢！-Color AT89C2051-driven game play box is also interesting to note a small production, I hope you like!

这是一个简单的pid控制程序，用的是增量式pid控制，在智能车上使用的。-This is a simple pid control procedures, using the incremental pid control, used in the smart car.

基于电话网络的远程监测系统 附原理图及PCB图-Telephone network-based remote monitoring system attached schematic diagram and PCB

x5045的C51程序，实现看门狗和E2PROM功能-x5045 C51 procedures, and the watchdog function of E2PROM

LCD显示和单片机中断定时,单片机不断中断，通过中断计时，当一秒时间到，调用显示函数在LCD上显示时间 -LCD display and single-chip timer interrupt, microcontroller constantly interrupted by interruption of time, when the second time that call functions in the LCD display to show time

主要是LED屏的驱动,户外屏显示,程序中显示四个不停变化的图案.-LED screens are the main driver, outdoor screen display, the program shows the changing pattern of four non-stop.

PIC16F639的SPI操作源代码 PIC16F639的SPI操作源代码PI C16F639的SPI操作源代码-PIC16F639 source code of the SPI to operate the SPI operation PIC16F639 source PI C16F639 the SPI to operate the source code