C51单片机端，实现收到的HEX代码转换为BIN代码，并写入ROM中。...

DS1302实时实钟avr单片机控制程序-DS1302 real-time clock control procedures avr Singlechip

c8051f020的pca频率输出，针对c8051f020的实验系统-err

适用于dos环境的串口通信，很好的程序-dos environment applicable to the serial communication, good procedures!

485单相电能表开发程序，液晶显示。采用AD7755设计，可与掌上电脑连机通信设置各种电能表参数。-485 single-phase energy meter development process, liquid crystal display. Design using AD7755 can be connected Pocket PC communication settings of various parameters of energy meter.

关于单片机的一些东西，对初学者有一定的帮助-About SCM something for beginners have some help

51单片机编程范例（定时/计数器软件编程范例）-51 microcontroller programming paradigm (timer/counter software programming paradigm)

在发一个PC机与51单片机通讯的程序，简单易懂。-In the hair of a PC machine with 51 single-chip communications procedures, easy-to-read.

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

串口上位机，用于接受下位机所传数据，实现双向控制，本软件是用于接受、控制，无线终端节点-PC serial port for the next bit plane data by mass, to achieve bi-directional control, the software is used to receive, control, wireless terminal nodes

AT89C2051驱动步进电机-AT89C2051 driver stepping motor.