该文档包含了keilc常用的子程序，共有２５个运算类代码，非常实用．...

用C8051F040实现DA（模拟-数字）变换。C8051F040集成了12位精度的DA转换器。-With the C8051F040 to achieve DA (analog- digital) conversion. C8051F040 integrates a 12-bit accuracy of the DA converter.

DP_51PRO实验仪图形液晶显示实验。先在屏幕上的随机位置显示随机数字(0--9)， * 然后调用画直线函数以屏幕中心为中点画对称的直线，最后显示一个简单的窗口。-Experiment DP_51PRO graphics liquid crystal display experiment. First in a random location on the screen shows random number (0 9),* then calls the function to draw a straight line in the screen center line stipple symmetry, and finally shows a simple window.

基于凌阳SPCE061，具有语音功能的波形发生器-Based on Sunplus SPCE061, voice-enabled waveform generator

用BC7281键盘辛片,通过12864显示,有键盘操作,主要是密码校对,提示-BC7281 Sim films with the keyboard, through the 12864 show that has keyboard operation, mainly password proofing, suggesting

nRF24LO1_SPI程序，MCU控制两块nRF24LO1之间的无线通讯，也可以通过UART打印和发送数据-nRF24LO1_SPI procedures, MCU control nRF24LO1 between the two wireless communications, can also print and send data UART

电动自行车控制器详细原理图，对无刷电机控制开发有帮助-Electric Bicycle Controller detailed schematic diagram of brushless motor control development help

利用单片机设计的音乐播放器，在PROTEUS仿真环境下运行-microprocessor designed music player, in PROTEUS simulation environment running

CS8900，驱动代码。适合S3C2410开发板用。-CS8900, driver code. S3C2410 development board for use.

基于proteus的指针式温度计的源码，伺服电机驱动-Based on the Proteus of the source pointer thermometer, servo motor drive

采用TOP227单片开关电源芯片实现的充电器，内附电路图-used TOP227 SMPS chip chargers, enclosing circuit