Digital stopwatch, can display hours, minutes, seconds, tenths of a second, hund...

PC机的串口收发软件　！！！C语言 PC机的串口收发软件　！！！C语言-PC serial port transceiver software! ! ! C language PC serial port transceiver software! ! ! C language PC serial port transceiver software! ! ! C Language

定时减法计数。输入数据0到9之间三位数，开始计时，每秒减一。当计数完成时，可做二次开发。还可做简单加减法-Timing counts subtraction. Input data between the three-digit 0-9, start running, by one per second. When the count is complete, do the secondary development. Also to do simple addition and subtraction

用S1实验板 P1口的8个发光管每隔2个右循环点亮 -Experiments with S1 plate P1 mouth every 8 LED 2 right circle lit

pic高亚报警器程序，用的是12c508a.后缀改称txt-pic-Asia alarm procedures, using the 12c508a. Txt extension renamed

这是一个IO口模拟串口，采用51汇编代码编写的程序-This is a simulation of serial IO port, using a program written in assembly code 51

hotkey.rar

此源代码是MSC51项目。这是一个具有自动递增功能的定时器，如果出现电源故障，可以将最后一次计数保存到at89s8254的片上闪存eeprom中。本方案采用七段式液晶显示器代替液晶显示模块。

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

查0~6的立方值，在内存的TABLE中存放-this program is use fo calculate the cube of 0~6,which defined as a array in the ram memory