DS1302HT1302 real

USART以查询方式收发数据，接收发自电脑的数据，将其显示在LED上，并将接到到的数据减1后返回电脑-USART to send and receive data to query, receive from the bottom of the computer data that could be displayed in the LED, and will receive the data returned by a computer

pic18fxxx单片机实用软件与接口技术――C语言及其应用-Singlechip pic18fxxx Practical Software and Interface Technology- C language and its application

pc key control code you can use it

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

内含各国最基础的电路图,并做了详细的说明,对做底层开发的人员很有用.-States containing the most basic circuit diagram, and to do such a detailed description of the development on the ground floor to do the personnel very useful.

PIC单片机程序设计基础 入门教程.-PIC Design Basics Guide.

IEEE754 浮点数与半浮点数相互转换-IEEE754 floating-point and semi-floating-point conversion between

示例程序下载关于单片机接上-download examples of SCM connected

单片机RS232/RS485串行发送实验（双机通讯）。 实验步骤： （1），准备两台598K实验机，确定1号机为发送，2号机为接收； （2），当作RS232接口实验时，1号机和2号机的P3.0和P3.1交叉相连，且两机共地； （3），当作RS485接口实验时，1号机和2号机的A、B作对应连接，同时1,2号机的R/TEN接P1.0, P3.0接R0, P3.1接DI。 （4），先运行2号机，键入[27]-->[EV]使2号机处于接收状态P。，后运行1号机[26]-->[EV]使1号机处于发送状态,P。会闪烁，在1号机键盘上按动数字键，在2号机的数码管上应显示对应的数字键值。-Send Singlechip RS232/RS485 serial experiment (two-plane communications). Experimental steps: (1), prepare two sets of experiments 598K machine, determined on the 1st machine to send, on the 2nd machine to receive (2), as a RS232 interface experiment, on the 1st and the 2nd machine and P3.0 P3.1 cross-linked, and the two planes were to (3), as a RS485 interface experiment, on the 1st and the 2nd machine A, B for the corresponding connection, while 1,2 No. of R/TEN then P1 .0, P3.0 access R0, P3.1 then DI. (4), first run on the 2nd machine, type [27]

PCF566是LCD液晶驱动芯片，此驱动芯片在电表行业使用比较多，上面是PCF566芯片在AVR单片机上使用的驱动子程序，可以移植到其他产品上。-PCF566 is LCD LCD driver chip, the driver chip in the meter industry more, the top chip in the AVR Singlechip PCF566 use driver subroutine, can be transferred to other products.