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本项目是基于Cortex-M3 的地沟油快速检测装置，旨在实现“地沟油”快速，现场检测。MCU控制可编程的直接数字频率合成器（DDS）产生正弦激励信号，经过可变增益放大器（VGA）和低通滤波器（LPF）作用于食用油阻抗传感器（实验室制作）信号经过仪器放大器送入微控制器（MCU）的模数转化（ADC）通道，MCU对采集的信号通过快速傅里叶变换（DFT）处理，实现食用油阻抗与相角的检测；USB和以太网接口，可与计算机通讯，以便对采集的数据进行存储和分析。(The project is based on the Cortex-M3 waste oil rapid detection device designed to achieve " waste oil" rapid, on-site testing. MCU control programmable direct digital frequency synthesizer (DDS) generates sinusoidal excitation signal through a variable gain amplifier (VGA) and a low-pass filter (LPF) acting on the oil-impedance sensor (lab produced) to send signals through the instrumentation amplifier into the microcontroller (MCU) modulo conversion (ADC) channels, MCU signal acquisition via Fast Fourier Transform (DFT) processing, oil resistance and phase angle detection USB and Ethernet interfaces, and computer communication, in order to collect data for storage and analysis.)

自己写的一个带有松手检测和长按识别，短按识别，长短按区分的键盘扫描程序(Write your own keyboard scanner with a loosely detection and long-identification, press recognition, length according to the distinction)

用Visual C++ 6.0实现的一个VSP程序。包你看后受益匪浅。(with Visual C 6.0 of a VSP procedures. After looking at the package you benefited.)

用stm32单片机进行pwm输出和ADC设置(USE STM32 MCU OUT PUT PWM WAVE AND ADC)

数据转换为正弦图，最终输出的正弦图为平均正弦图。(Data into sine figure, final output sine the graph is the average sinogram.)

240128液晶驱动的测试程序，c语言编写(240,128 LCD driver testing procedures, c language)

工业上采用的HART通信协议相关的资料，包含有HART命令、HART协议C语言源码。(HART communication protocol-related information used on industrial, including The HART command, HART protocol source code using C language .)

说明：  PMAC 中文手册（推荐详细）PMAC（可编程多轴运动控制器），是美国Delta Tau Data System 公司于推出的PC 机平台上的运动控制器,是一个完全开放的系统。(PMAC Chinese Manual (Recommended Details))

单片机播放 音乐 是学习的好资料 音频学习

AD7746 用51测试来获取最小电容~(use 51 measure AD7746)