recovery-update

通过实现简单的线性反馈移位寄存器（LFSR），理解LFSR的工作原理、本原多项式重要意义(By implementing a simple linear feedback shift register (LFSR), to understand the working principle of LFSR, primitive polynomial significance)

dos 工具 用老版本的gcc编译，否则会出错(dos tools with older versions of THING)

通过单片机实现哈希函数SHA-1，C源程序完全可用，已经测试，外部加密芯片采用DS28E01-100(MCU hash function SHA-1, C source code fully available, and has been tested external encryption chip uses DS28E01-100)

本程序是虚拟示波器，可以显示多条曲线波形，调节幅值和时间(Oscilloscope can display multiple curve )

单片机at89c52控制步进电机，愿跟大家一起分享(Microcontroller at89c52 control stepper motor, is willing to work with you to share with)

基于STM32f103控制HX711和LCD实现的电子秤，软件已调试成功，称重比较准确(Based STM32f103 control the HX711 and LCD electronic scale implementation, the software has debugging success, weighing more accurate)

建立单片机控制系统，研发需要的产品上面需要更完美的展现。(Establishment of MCU control system, research and development needs of the above products need to be more perfect show.)

at91sam7a3的pwm学习例程，运行于iar开发环境，调试通过(at91sam7a3 pwm learning routines, running in the the iar development environment, debugging through)

此设计模拟工业控制现场，通过调节Labview界面中的模拟仪表，通过RS232串口通信，把转速控制信息通过串口传送到单片机中，进而利用单片机控制电动机的转速。(labview-based PWM motor speed)

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.)