USB_2.0.pdf

此代码是关于利用51单片机实现步进，滞留等程序的参考用。(This code is on the use of 51 single-chip stepper, detention and other procedures for reference.)

Smart card虚拟读卡器驱动源码，这个很稀少的哦(smart card virtual driver source code.)

MDK RTX51 开发51单片机，使用RTX，对于初始学者很方便(MDK RTX51 )

IAR开发环境，STM8L单片机，Att7053计量芯片，此仪表程序可以显示电压电流频率(IAR development environment, STM8L SCM, Att7053 measurement chip, the instrument can display the voltage and current frequency of program)

pca 用于定时器功能 pca可用于捕捉，定时，pwm输出等功能(pca pca can be used to capture, timing, pwm output for timer function)

基于stm32f407的手写识别程序，亲测可用(Handwriting recognition program based on stm32f407)

基于STM32F4的四轴航拍平台。以STM32F407为控制核心，四轴飞行器为载体，辅以云台的航拍系统。硬件上由飞控电路，电源管理，通信模块，动力系统，机架，云台伺服系统组成。算法上采用简洁稳定的四元数加互补滤波作为姿态解算算法，PID作为控制器，实现飞行，云台增稳等功能(Four axis aerial platform based on STM32F4. Taking STM32F407 as the control core, the four axis flying vehicle as the carrier, and the aerial camera system with ptz. The hardware is composed of flight control circuit, power management module, communication module, power system, frame and PTZ servo system. The algorithm uses a simple and stable four yuan number plus complementary filtering as the attitude calculation algorithm, and PID is used as a controller to achieve flight, PTZ stability, and other functions)

计时器,实现时钟计时(reckon by time)

ad_da 数电——模电 转换,单片机应用子程序(ad_da transformation)

cj60lib示例代码，包含例子的工程，虽然简单却实用。(example of cj60lib)