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Keyboard
- 设计采用P3口作为扫描键盘接口，P1.0口作为输出，P1口低4位接4X4矩阵键盘的列，高4位接行。 CPU工作在查询方式下并开放中断，且将定时器T1设为最高优先级。当程序扫描到按键时调用延时防抖后再次扫描并判断键值，并转入相应的按键处理子程序，在子程序中向定时器装入初值并启动其工作，当定时器溢出时向CPU申请中断，CPU响应中断后转入中断子程序，输出预定频率的方波并送到音频放大模块进行放大输出。 -Design uses a scanning keyboard interface por
1602
- SST’s 25 series Serial Flash family features a four-wire, SPI-compatible interface that allows for a low pin-count package which occupies less board space and ultimately lowers total system costs. The SST25VF016B devices are enhanced with imp
wzjsq
- 通用计数器C程序，采用芯片STC11F02E+74HC164，四位共阴数码管，不怕掉电，AC220V交流电检测采用频率采样而快速保存数据到EEPROM，电路简单，成本低，稳定性好。本程序完整，已经批量生产。-Universal counter C program using chip STC11F02E+74HC164, the four common cathode Digital tube, not afraid of power-down, AC220V AC detection usin
pinglvji
- 基于MSP430制作的频率计 输入一个低频信号可以测出频率-Based on MSP430 produced a low-frequency signal input frequency meter can measure the frequency
Trie
- 用字典树的方法高效地对英文文章的单词进行词频统计，并输出统计结果（词频由小到大）-To count the word frequency for an english artical efficiently, using the algorithm of trie, and output the statistic result(word frequency from low to high)
BPSK
- 此调频接收机的设计可以分成调谐回路、高频放大、混频、本机振荡、中频放大、鉴频、低频功放等几个部分。-This design can be divided into the FM receiver tuning circuit, high frequency amplification, mixing, local oscillator, IF amplification, frequency, low frequency amplifier and other sections.
ImageEnhance
- 对数字图像进行频域滤波，有Butterworth低通滤波、Butterworth高通滤波、指数低通滤波、指数高通滤波-Digital image frequency domain filtering, there Butterworth low-pass filter, Butterworth high-pass filter, low-pass filtering index, index of high-pass filtering
M
- 小波去噪，将噪声信号分解成低频与高频。采用类小波阈值去噪-Wavelet denoising the decomposed signal into low and high frequency noise. Wavelet thresholding using Class