Multisim

DAC数模转换，SPI串口通讯，单片机stm32，快速简单(DAC digital mode conversion, SPI serial communication, MCU STM32, fast and simple)

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说明：  基于msp430的按键程序，按下按键后，实现led的反转。使用下降沿中断。 (Msp430-based key program, press the button, the realization led reversal. With falling edge interrupt.)

鼠标图案显示，用单片机控制在1602上显示的简单程序设计，主要含有1602液晶的所有函数(The mouse pattern MCU control display simple program designed in 1602, mainly contain all of the 1602 LCD function)

SPI通信---pic18系列单片机编程实现使用MAX7219控制4位7段数码管显示数字：0 1 2 3。(SPI communication--- pic18 series microcontroller programming using the MAX7219 control four 7-segment LED display digits: 0123.)

于市售 STM32 开发板上实现特定人语音识别处理项目。识别流程是：预滤波、ADC、分帧、端点检测、预加重、加窗、特征提取、特征匹配。端点检测(VAD)采用短时幅度和短时过零率相结合。检测出有效语音后，根据人耳听觉感知特性,计算每帧语音的 Mel 频率倒谱系数(MFCC)。然后采用动态时间弯折(DTW)算法与特征模板相匹配,最终输出识别结果。先用Matlab对上述算法进行仿真，经数次试验求得算法内所需各系数的最优值。而后将算法移植到 STM32 开发板上，移植过程中根据 STM32 上存储空间相对较小、计算能力也相对较弱的实际情况，对算法进行优化。最终完成于 STM32 微处理器上的特定人语音识别系统。(Implement speech recognition processing project in commercially available STM32 development board. Identification is the process: pre-filter, ADC, framing, endpoint detection, pre-emphasis, windowing, feature extraction, feature matching. Endpoint detection (VAD) short-time amplitude and short-term zero rate combined. After detecting an effective voice, according to the characteristics of human auditory perception, calculated for each frame of speech Mel Frequency Cepstral Coefficients (MFCC). Then dynamic time warping (DTW) algorithm and feature template matches the final output recognition result. First with Matlab simulation algorithm described above, after several trials to get the optimal value of each coefficient within the desired algorithm. The algorithm will migrate to STM32 development board, the porting process according to the STM32 relatively small storage space, computing power is relatively weak situation of the optimization algorithm. Finally completed on the STM32 micr)

说明：  学习STM32的基础例程，对初学者很有帮助，主要是对DMA的基本操作(Learning the basic routine of STM32 is very helpful for beginners, mainly for the basic operation of DMA)

说明：  最好的单片机C语言学习用书，详细的完整版，功能很强，适用于初中级学习者(The best single-chip C language learning books, detailed full version, features a strong)

泰克示波器TDS3000系列基于LabVIEW的程序源代码，适合GPIB、RS232等接口。(Tektronix DPO TDS3000C‘programming code which is based on LabVIEW is applied for GPIB and RS232 communication.)

利用DAC0832来产生锯齿波的Proteus图(The use of DAC0832 to generate the sawtooth wave C language )