我自己做的给予ST公司的upsd3234a单片机的频率计。可以测量10K以下的频率。这是此频率计的自检程序，在KEIL上调试仿真通过。...

程序资料共享 希望大家共同进步 共同努力 加油 ！-Procedures for the sharing of information would like the common progress of the joint efforts of U.S. refueling!

51在多机通讯时可采用此方式，3线式，忙时可无限等待，闲时传输速率高-51 in the multi-machine communication use this form, a three-line, busy waiting for an unlimited time, in his spare time high speeds

用TI单片机MSP430系列写的CRC检验程序，C语言-Using TI single-chip MSP430 series written by CRC testing procedures, C language

595数码管驱动，用于51单片机，使用3个io口，串行驱动数码管-595 digital tube-driven, for 51 MCU, using 3 io port, serial driver digital tube

PCF8563时钟芯片的驱动 头文件用mega16单片机-PCF8563 clock chip-driven header files using SCM mega16

一些常用的c51源码，编程时可以参考。-some frequently used source decoder, the reference can be programmed.

通过环路串口判断串行通信电平转换芯片功能是否正常，并通过读写DRAM 判断硬件。-Through the loop to determine serial communication serial port level translator chip features and whether it is normal, and through reading and writing DRAM hardware judge.

320×240液晶驱动源程序-320 240 LCD driver source

a51 令牌通讯-a51 makes the sign communication

系统采用52单片机作为系统核心处理器，通过串口手法图像数据，利用那个TR800最为GSM模块，接收和发送图片。-System uses 52-core processor as the system microcontroller via serial port means the image data, using that TR800 most GSM module, to receive and send pictures.