实验箱上的蜂鸣器发出对应的音调（中音），当同时按下L和1-7时是，蜂鸣器发出低音，同时按下H和1-7时，蜂鸣器发高音。只要按键没松开，蜂鸣器一直发声，直到松到按键。-The buzzer sounded on the test box corresponding to tone (Tenor), when at the same time when you press the L and 1-7, the buzzer sounded a bass, while pressing the H, and 1-7 when the buzzer made treble. As long as no release button, buzzer sound has always been, until the pine to the button.

单片机的简单的串口通信测试程序单片机的简单的串口通信测试程序

用51系列单片机演奏音乐的C51源程序(资料)-51 Series single-chip microcomputer with the C51 music source (information)

ISP 2051 download PIC

smart boy is gangadhar mail me iif can

使用凌阳单片机，控制5088编码芯片编码并传输到8870解码芯片，得到所需数字信号。-Sunplus use single-chip, chip encoding control code 5088 and transmitted to the 8870 decoder chip, get the digital signal.

51系列单片机实验课程：按键显示程序 （在数字键上按数字，在液晶显示器上显示）-51 Series single-chip experimental curriculum: key display program (in the figure by the number keys on the LCD display)

Knowledge-Based Image Understanding Systems A Survey

51单片机 24位AD CS5532读写源码-51 Single-chip 24-bit AD CS5532 to read and write source code

一个警报声程序 　　　　　　　　　　　　　　　　　 一个警报声程序-an alarm sounded a siren procedures procedures