51单片机简单操作系统源码，其他地方下的，可能拿来分析分析，学习学习...

以MC68HC908SR12为例的IIC总线源程序-MC68HC908SR12 example to the IIC bus source

320240lcd Drive 89系列单片机通用-320240lcd Drive 89 Series Single-chip Universal

关于显示的程序，采用太阳人公司生产的液晶模块，可直接引用。-show on the procedures for using solar company production of LCD module, which can be directly invoked.

利用单片机加控制直流电机，利用P1口，编制程序输出一串脉冲，经放大后驱动小电机，改变输出脉冲的电平及持续时间，达到使电机正转、反转、加速、减速。停转之目的。 可以通过74LS244输入开关量数据来控制小直流电机的转动，实现正转四种转速，反转四种转速及停转。 -The use of SCM in controlling the DC motor

这是一个红外报警系统，该系统通过555调制红个发光管，发出38KHZ的红外信号，对面使用一个红外接收头接收信号用来检测是否有人通过，如果有，则声光报警，-This is an infrared alarm system, which modulator 555 through a red light-emitting tube, issued 38KHZ IR signal, opposite to the first use of an infrared receiver to receive signals to detect whether or not it was passed, if so, make a sound light alarm,

C51下个原代码,包括两个部分HT9200、HT9170 调用程序（C51）.c和HT9200、HT9170 调用程序注解-C51 under the former code, including two of HT9200, HT9170 called procedures (C51). c and HT9200 and HT9170 call procedures Notes

MS12864-R的串行驱动，包括了反白显示，画图部分命令-MS12864-R serial driver, including anti-white display, drawing some of the command

LCD1602的程序,只需调用其中几个函数就可以,C51版的-LCD1602 procedures, just a few function calls can, C51 version of

51系列单片机开发：实验课程 显示程序（液晶显示）-51 Series MCU Development: Experiments show the curriculum process (liquid crystal display)

用于向51单片机和ARMlpc系列单片机下载程序-For the 51 Series Single-chip MCU and ARMlpc download