实现一个基于8051单片机控制的4相步进电机系统 ，由单片机产生正确的驱动脉冲信号。...

I2C串行总线标准驱动程序(C51)-万能程序 -I2C serial bus driver (C51)- omnipotent procedures

数字频率合成器DDS9851控制系统的单片机源代码，键盘输入频率，液晶显示，并实时输出所需频率，该系统可选择输出方波和正弦波。-Digital Frequency Synthesizer Singlechip DDS9851 control system source code, keyboard input frequency, liquid crystal display, and real-time output frequency required, the system can choose the output square wave and sine wave.

在Power-I 51 Mini开发板上，基于89C51单片机开发的数字音乐盒，可以实现上一首下一首，播放，暂停，停止，的按键功能，并有数码显示时间，开机画面和曲号。-in the Power- I 51 Mini development board. 89 C51 microcontroller based on the development of the digital music player, can be achieved on the first one the next broadcast, suspension, stop, The function keys and a digital display, startup screen, and song.

用51单片机的PWM实现DA -PWM using 51 single chip realize DA

利用AT89C51单片机做的一个音乐卡,可以播放多首歌曲-AT89C51 single-chip microcomputer use to do a music card, can play more songs

NRF905芯片的C51接收子程序-NRF905 C51 chip receiver subroutine

arm7 bootloader source, very good-arm7 Bootloader source, very good

AT24C512中数据的文件系统化管理的文章-AT24C512 document systematic data management articles

单片机控制LCD1602液晶显示的驱动程序-SCM LCD1602 LCD driver

ACEXT1K30最小系统的原理图和成熟PCB版图，可以直接拿到PCB制作厂商制作。同时也提供了与你自己定义的系统的接口，方便你将ACEXT1K30直接嵌入到你的系统中，而不需要再做其他的工作了-ACEXT1K30 the schematic and PCB layout mature, can be submitted directly to the production of PCB manufacturers produced. Also provided with your own definition of the interface, you will facilitate ACEXT1K30 directly embedded into your system without the need to do the work of the other