对于一个单片机初者来说一定想自己设计一个小系统吧・・这里提供了以89S52为核的小系统图和源程序！希望对刚学者有所帮助...

单片机内部定时器编程-Single-chip internal timer programming

12864LCD的反白显示，现在大多LCD都是两行同时显示，该源码实现了单独显示。-12864LCD anti-white display, and now most LCD are two lines at the same time revealed that the source has a separate display.

x5045有四种功能：分别是上电复位、看门狗定时器、电源电压监控和块锁保护串行eeprom的功能， 该程序通过改变控制寄存器的参数可以实现看门狗定时器监视电压和设置保护rom区，每次复位后 地址计数器都是该区的首地址（个人观点），即断点地址。 问题：其实对该芯片的应用还是很模糊-x5045 four functions : the reduction of electricity, watchdog timer, Supply voltage control and protection block serial eeprom lock function, The procedure by changing the parameters of control register can be achieved watchdog timer and set up surveillance voltage protection rom, After each reset address counter area is the first address (personal view), breakpoint address. Question : In fact, the application of this chip is still very fuzzy! !

讲述如何提高单片机的运行速度,包括硬件上和软件上如何做相应的设计-on how to improve the speed MCU, including hardware and software on how to do the design accordingly

lcd驱动包含中文字库,gb2313.可带触摸屏-lcd drive contains Chinese characters, gb2313. May bring Touchscreen

PKE（被动无钥门禁系统，汽车车门控制）整个系统基站部分源代码。-PKE (passive-keyless-entry system, car door control) part of the whole system base station source code.

单片机系统上电后，P0 口和 P1 口都被清 0。然后，你规定一个由 6 个数字构成的序列（每个数字从 0～F 中选取），比如 E、8、9、0、7、F。然后每次当单片机检测到外部中断 0发起中断时间时，读取 P0 口和 P1 口上的状态值，当连续 6 次外部中断事件的对应的数字序列构成你所设定的序列后（举例来说，如果 P0.0 是 1，P0 和 P1 的其他管脚是 0，那么我们称为检测到一次数字 0），从串口打印输出一幅类似下图的 16×16 的ASCII码的圣诞树图片。-Single-chip microcomputer system after power, P0 and P1 mouth I have been ching 0. Then you set a six figure constituted by the sequence (each number from 0 ~ F in selected), for example, E, 8,9,0,7, F. And then each time a single-chip detects external interrupt 0 initiated interruption time, I read the P0 and P1 mouth on the state value, when a row 6 times the corresponding external interrupt events constitute digital sequence set your sequence (for example example, if P0.0 is 1, P0 and P1 of the other pin is 0, then we called a number of detected 0), a printout from the serial port under similar 16 × 16 map of the ASCII code of the Christmas tree图片.

同为电脑遥控器，也是AVRUSB制作，但是带有触摸方式！-The same for the computer remote control, but also AVRUSB production, but with a touch-way!

This module provides an interface to an alphanumeric display module. The current version of this driver supports any alphanumeric LCD module based on the:Hitachi HD44780 DOT MATRIX LCD controller.

在8051单片机应用系统中使用DiskOnChip_805-applications use DiskOnChip_805