radiusplugin_v2.1a_beta1

ii2读写pcf8591，基于stm32f10xzet6，pcf8591模块，实现热敏电阻转换(ii2 read/write pcf8591)

Strings are stored as: length[4-bytes] + string_data +

其原理很简单，就是MSP430F14x系列单片机Timer A模块有一个比较/匹配功能，利用这一功能可以输出任意频率、任意占空比的方波，把这些方波输给蜂鸣器就可以播放了。当然要让蜂鸣器播放《最炫民族风》，最大的挑战是写C语言版的“乐谱”。所幸小时候学过五六年的小提琴，再加上物理竞赛的背景，因而对于乐谱、乐理、音频、节奏等等关键概念都略懂一二。废话不多说了，直接上源代码： (The principle is very simple, is MSP430F14x Series MCU Timer A module has a compare/match function, the use of this feature can be output at any frequency, arbitrary duty cycle square wave, square wave lost these can play a buzzer. Of course, to make the buzzer play " the most unusual national wind" , the biggest challenge is to write C-language version of " music." Fortunately, the child learned the violin in 2056, coupled with the physical contest background, and thus for sheet music, music theory, audio, rhythm, etc. have little knowledge of twelve key concepts. Ado, directly on the source code:)

ST7789S-G4A APPLICATION PACKAGE，包括AN和初始化代码，实现ST7789S驱动240RGB*320分辨率的TFT液晶驱动，2.4寸，2.8寸，3.2寸，对液晶行业设计工程师有很大帮助(ST7789S-G4A APPLICATION PACKAGE, including AN and initialization code to achieve ST7789S driver 240RGB* 320 resolution TFT LCD driver, 2.4 inch, 2.8 inch, 3.2 inch, LCD industry for design engineers are very helpful)

说明：  无刷电机驱动器源代码。基于无传感器方案的无刷电机启动器。核心是换向角度检测：即电机反电势波形数据处理，经过衰减滤波，取出过零相位。应为低速反电势波形dB过小，波形扰动太大，本程序还不能稳定处理10Hz以下的换向计算。(Brushless motor driver source code. Program based on the sensorless brushless motor starter. Is the core to the point of view for detection: the motor back-EMF waveform data processing, through the attenuation filter, remove the zero-crossing phase. For low-speed back-EMF waveform dB is too small, waveform disturbance too, this procedure can not be stabilized to 10Hz for the following calculation.)

51单片机连接射频芯片rc522的单片机程序(51 single connection RF chip microcontroller program rc522)

1000以内所有的完数，比较简单，用于学习和交流(1000 all finished within few, relatively simple, for learning and communication)

ABAQUS子程序二次开发，据此编制排水板单元UEL。(Subroutine of ABAQUS secondary development, on the basis of establishment of education-the drainage plate unit. )

网上买到的 HI3518 下的 简单DVR CODE, 需要你了解 3518 SDK， 才能编译， (Simple DVR CODE HI3518 under buy online, you need to understand 3518 SDK, you can compile,)

基于单片机的ECG数据采集与预处理 本课题首先介绍了心电信号检测电路的设计，给出了心电信号采集电路具体的设计方法与部分实现电路。并采用了线性光电耦合器放大电路，对前置级运算放大电路及后置级放大电路进行光电隔离，有效地抑制了各种干扰。 其次，主要进行基于AT89C52低功耗MCU的便携式心电监护仪及其系统的研究。 根据人体心电信号的特征，设计性能优良的心电信号采集系统，选用低功耗8位单片机AT89C52和大容量Flash存储器对采集的心电信号进行记录、分析及处理(MCU-based ECG data acquisition and pre-treatment of the subject introduced first ECG detection circuit design, are given specific ECG acquisition circuit design method and some realization of the circuit. And the use of a linear optocoupler amplifier, the pre-amplifier circuit-level operations and post-class amplifier circuit for photoelectric isolation, effectively a variety of interference suppression. Secondly, AT89C52 mainly low-power MCU-based portable ECG monitor their systems. ECG in accordance with the characteristics of the human body, the design performance of the ECG acquisition system, selection of low-power 8-bit MCU AT89C52 and large-capacity Flash memory on the acquisition of the recorded ECG, analysis and processing)