51单片机三首歌播放原代码

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基于单片机的频率采集、计数以及显示程序,具有广泛的作用~-The frequency of single-chip based on the collection, counting and display procedures, the role of a broad ~

仪器仪表键盘显示模拟系统，用AT89S52芯片作为系统的CPU，控制系统的按键及显示器部分。用8路同相三态双向总线收发器74LS245芯片驱动LED。4X4矩阵键盘作为系统人机交互的重要部分，用于向单片机应用系统输入数据或控制信息，设计4X4矩阵键盘分别对应键码“0-F”。系统可以实现的基本功能包括开机LCD液晶屏幕显示“大专05电子信息X班XXX毕业设计”信息；按下任意一个按键，LCD液晶屏幕显示相应按键的信息。在基本功能的基础上还增加了一个扩展功能，即增加一个LED数码管同步显示相应键码-Show the simulated keyboard instrumentation systems, using AT89S52 chip as a system CPU, system control buttons and display parts. With 8-phase three-state bidirectional bus transceiver 74LS245 chip-driven LED. 4X4 matrix keyboard system as an important part of human-computer interaction, single-chip microcomputer application system used to input data or control information, the design of 4X4 matrix keyboard key code corresponding to

AVR单片机源代码,采集按键值,并点亮LED.-AVR Singlechip source code, the value of collecting keys and lit LED.

单片机控制1420语音芯片发声程序。同时通过485通信方式与外界进行数据通信。-1420 single-chip control procedures audible voice chip. At the same time through the 485 means of communication with the outside world for data communications.

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pwm convter.it contains C sourse. has been modified.

MSP430F20X系列单片机示例源代码-MSP430F20X Series Single-chip sample source code

OPENGMAX，大家可能都用到过，这里可以和大家分享一些优化的代码，可以共同提高，ARMcode 优化-OPENGMAX, you may have used before, here we can share some optimized code, can work together to improve, ARMcode optimization