hongwaibianma

电子时钟的小程序，基于89c51单片机，可以实现定时、计时、修改时间等功能。(Electronic clock applet, based on 89c51 microcontroller, can achieve timing, timing, modification time and other functions.)

此文件夹有高通滤波，低通滤波，带通滤波，带阻滤波，三角信号发生器，正弦信号发生器，三角波发生器，三角波转换成余弦，等等tina的源程序，适合广大爱好者！(This folder has a high pass filter, low pass filter, band-pass filtering, band stop filtering, triangular signal generator, sine wave generator, triangle wave generator, triangle wave into a cosine, so tina source for the majority of fans !)

说明：  双路输出控制器”具有信号输出时间设定、 输出信号占空比调整、 当前输出通道及时 间显示、系统工作参数存储、串口通讯及 LED 指示等功能。 “双路输出控制器”通过串口完 成信号输出时间设定功能；通过 EEPROM 完成系统工作参数存储功能；通过按键完成输出通 道切换、 输出信号占空比调整及停止信号输出功能； 系统硬件电路主要由 MCU 控制单元、独 立按键、 LCD 显示单元、 串口通讯单元、 EEPROM 数据存储单元和 LED 指示单元组成(Dual output controller has the signal output time setting, adjust the duty cycle of the output signal, the current output channel in time Between display, system operating parameters are stored, serial communications and LED indicator. Dual Output Controller through serial END A signal output time setting function complete system operating parameters via EEPROM memory function complete output pass through the key Channel switching, adjust the duty cycle of the output signal and the stop signal output function the system hardware circuit is mainly controlled by the MCU unit, alone Li buttons, LCD display unit, serial communication unit, EEPROM data storage unit and LED indication units)

对于闭环控制有很好的说明以及pid算法的具体实现(Specific implementation for closed-loop control has a good explanation and pid algorithm)

学习使用contex-m3的stm32f103c6的程序库，LCD1602驱动程序。(Learn to use contex-m3 of stm32f103c6 the library, LCD1602 driver.)

南京罗姆显示器 单片机显示控制软件，显示 频率码和标识信息。(Single chip microcomputer display control software, display frequency code and identification information in Nanjing.)

滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)

51单片机程序，两个74HC595驱动8位数码管程序，串行输入，3个IO口控制8位数码管动态扫描(failed to translate)

宽频放大器,有以下功能: 预置增益,增益加/减,显示输出电压有效值,自动增益 显示有效值. 增益输入及加减 自动增益没有实现(Wideband amplifier has the following functions: Preset gain, gain plus/minus, the display output voltage RMS, automatic gain display rms. AGC gain input and subtraction is not implemented)

通过51单片机实现串口通信，并在外接LED显示器上显示。(51 microcontroller via serial communications, and displayed on an external LED display.)