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usb-isp,直接用usb对avr单片机编程,简单易用-usb-isp, the direct use of usb for avr Microcontroller Programmer, easy-to-use

一个用汇编编写的51单片机发声程序,内嵌一首简单歌曲"八月桂花香"。-Used to prepare a compilation of 51 single-chip voice procedures, embedded in a simple song

高速电路的信号完整性问题，共同学习，有借鉴意义-Based on the Signal Integrality theory, the key problem met during signal processing module design and its solution is given

利用单片机定时计数器，测量信号频率： 利用单片机定时计数器，测量信号频率-The use of single-chip timer counters, measuring signal frequency: use of single-chip timer counters, measuring signal frequency

程序能够实现将十二位的二进制数5V对应fffH变换成一路0~5V的电压。 精度方面：在使用时上下波动范围大约是0~2fH能保证高位寄存器准确； 调试过程中遇到了一系列问题：（1）p0口的使用需接上拉电阻，内部没有带电阻；（2）调试的过程最好使用单步运行，以便于察看寄存器的内容；（3）对系统板不熟悉，一些硬件方面容易出问题，像口连接，电源、地的连接。（4）直流电源使用不准确，内部的各个电源输出是独立的，需要共地。 -procedures to achieve 12 to a binary number 5V counterparts fffH transform all the way into the 0- 5V voltage. Accuracy : the use of fluctuating ranges of 0 ~ 2fH can guarantee accurate high register; debugging process encountered a series of questions : (1) p0 I need to connect to the widening use of resistance, with no internal resistance; (2) the process of commissioning the best use of single-step operation, in order to inspect the contents of Register; (3) The right not familiar with the system board, Some hardware problems are likely to occur, such as connectors, power, and connectivity. (4) DC power supply use of inaccurate, all within the Power output is independent, to the total needs.

单片机计数器程序。-counter SCM procedures.

运行于c51单片机上的用keil c创建的C源程序,采用PDIUSBD12接口。-run on the microcontroller with Keil c create C source code using PDIUSBD12 interface.

利用单片机的中断口来测PWM码的宽度，通过本实验仪配备的遥控，单片机解码在数码管上显示（图20）。实际应用例如：红外遥控-use SCM I interrupted to test PWM-yard width, the passage of the experimental apparatus equipped with the remote control, microcontroller decoding in a digital display tube (Figure 20). Practical applications such as : infrared remote control

基于H83664的空调控制模拟系统 aircondition.c、intprg.c -based on the simulation of air-conditioning control system aircondition.c. intprg.c

由4X4组成16个按钮矩阵，设计成16个音。 可随意弹奏想要表达的音乐。 -By the 4X4 matrix composed of 16 buttons, designed to tone 16. Free to play the music you want to express.