4* 4 keyboard scan applications uVision3 platform development in C51 programming

用单片机蜂鸣器实现911报警声音，采用中断延迟实现输出频率的变换。-Used to achieve single-chip buzzer 911 sounds, using interrupt latency to achieve an output frequency of transformation.

单片机驱动标准PC机键盘的C51程序 具体请看程序，-Microprocessor standard PC keyboard C51 specific procedures See procedures, thank you

mcu_PPP.rar是在M68HC08单片机上编写的TCP/IP协议程序.实现了SLIP、PPP、ICMP、UDP、TCP网络协议。 -M68HC08 Singlechip mcu_PPP.rar is prepared on TCP/IP protocol procedures. realize a SLIP, PPP, ICMP, UDP, TCP network protocol.

使用80C51单片机与PC机进行通信的源程序，能够使用串口线实现电脑控制单片机外围设备-80C51 Microcontroller and PC use to communicate the source machine, to use computer-controlled serial lines to achieve single-chip peripherals

自己写的CH452的驱动，用keil C51写的-himself wrote the CH452 drive with the Keil C51 write

单片机上网的TCPIP协议栈-SCM TCPIP Internet Protocol Stack

C8051F2xx的大量源程序示例代码，包括汇编和C的代码-C8051F2xx sample a large number of source code, including the compilation and C code

Self-tuning PID Controllers ,有需要的朋友可以参考 !-Self-tuning PID Controllers, there is a need of a friend can refer to the reference!

1总线通信协议应用实例-a bus communication protocol Application