74HC595的程序，C51版本，其他已调试

基于51系列单片机内部定时器写的一个时钟程序-51 Series single-chip based on an internal timer to write a clock procedures

I2C程序,自动反页-I2C procedures, automatic page-

很有用的一些从用代码 有keil编译实现的 可以-Useful to have some code from keil compiler can realize

DTMF编码芯片HT9200的51接口程序。输入参数R2表示发送数据个数，输入数据与发送数据与DTMF码的关系:00H-0 01H-1 02H-2 03H-3 04H-4 05H-5 06H-6 07H-7 08H-8 09H-9 0AH-A 0BH-B 0CH-C 0DH-D 0EH-* 0FH-#。详细说明参考文件内-DTMF encoder chip HT9200 51 interface program. R2 said input parameters to send data distribution, data entry and send data with the DTMF code : 00H-0 01H- 02H-2 Mr- 3 in the 04H-4 05H-5 06H-6 07H-7 08H-8 7-9 0AH-A 0BH- 0CH B-C 0DH-D 0EH-* 0FH-#. Detailed information paper

电机驱动电路 提供了H桥电路设计的几点思路和PWM的实现方法以。-Motor drive circuit provides the H bridge circuit design ideas and ways to realize the PWM.

基于ST792012864lcd驱动程序

4*4矩阵键盘（查表法） （C51环境）-4* 4 matrix keyboard (look-up table) (C51 environment)

8051单片机与PC宿主机通信的源代码，包含8051的汇编代码及PC机的C代码。-8051 Communication with the PC Host source code, including the 8051 assembly code and the PC-C code.

SPMC75F2413A单片机在AC变频空调中的应用-Singlechip SPMC75F2413A in AC inverter air conditioner application

用单片机设计电子音乐门铃，除了各个子程序外还包括音符节拍码数据表。 -Designed with single-chip electronic music doorbell, in addition to various routines, but also including key data sheet music beat.