fengimngqi

AD9851驱动程序，采用串行写入方式，STM32写入频率控制字。(AD9851 driver, using serial write mode, STM32 write frequency control word.)

基于STM32F4的示波器的源代码，内部含有ucos-ii操作系统。(STM32F4 based oscilloscope source code contains an internal ucos-ii operating system.)

单片机为at89s52控制步进电机正反调速实验,(The stepper motor positive and negative control experimental)

说明：  VB串口通讯实例 高精度电压表(24bit) VB源程序(VB serial communication example high precision voltage meter (24bit) VB source code)

基于STM32的16位DAC8811驱动程序，亲测可用(STM32-based 16-bit DAC8811 driver, pro-test available)

说明：  30章51单片机入门教程，让你轻松学会单片机，不用老师，自学也能学会(30 Chapter 51 MCU introductory tutorial, allow you to easily learn the microcontroller without the teacher, can learn to self-)

此程序为4*4矩阵键盘，键盘自身不带电源电阻，八个接线，在程序中进行需进行软件拉高拉低以便按键扫描。 应用单片机为MSP430F5529。(4* 4 matrix keyboard without power resistors MSP430F5529)

交通灯，使用定时中断来进行时间的加减，使用数码管进行显示，能够显示东西南北的红绿灯时间和灯的情况(Traffic lights, use the timer interrupt to the time of addition and subtraction, using digital tube display, it will show what traffic lights north and south of the circumstances of time and light)

ARM串口应用例子，适用于NXP23系列CPU,封闭式总线，采用内部FLASH及RAM.(ARM serial port application example for NXP23 series CPU, closed-end bus, using the internal FLASH and RAM.)

一个测试Radius的工具,可以测试Radius服务器是否正确(tekradius this is a good test tool)