ldpc编码与解码

说明：  基于51单片机的1602显示检测距离。程序可用无问题(1602 Display Detection Distance)

快速傅氏变换，是离散傅氏变换的快速算法，它是根据离散傅氏变换的奇、偶、虚、实等特性，对离散傅立叶变换的算法进行改进获得的。它对傅氏变换的理论并没有新的发现，但是对于在计算机系统或者说数字系统中应用离散傅立叶变换，可以说是进了一大步。

用DEBUG的O命令将一数发送到串行口（2F8H/3F8H）；然后在另一台机上用I命令读入串行口的内容。如果发送的内容与接收的内容一致，说明两机已经连好线，否则必须检查连线，直到两机可通信为止；-with DEBUG O ordered sent to a number of serial I (2F8H/3F8H); then another plane with orders I read serial port content. If the sending and receiving of consistency that the two planes had not even good line, or it must examine connections until two machine communications;

实现4×4的数组元素的无冲突的存储，该算法不使用结构体，而直接使用了数组元素与下标之间的关系实现，比较巧妙，16×16可参照类似算法实现。(Realize 4 × 4 array of elements of the conflict-free storage, the algorithm does not use the structure, while the direct use of the array elements and the relationship between the subscript realize, more subtly, 16 × 16 can be the light of a similar algorithm.)

单片机实现直流数控稳压电源,可调电压为0-9.9伏,步进为0.1伏,可以自动扫描键盘以增加或者减少电压(MCU NC Regulators DC power supply with adjustable voltage of 0-9.9 volts, stepping to 0.1 volts, can automatically scan the keyboard to increase or reduce the voltage)

MATLAB ask psk fsk dpsk调制解调

说明：  qt5 http模块简单测试，主要是get post的异步使用(Simple test of Qt5 HTTP module)

Windows Socket Server

说明：  适用于stm32平台，已经过实际测试，测试模块为GY-906(It is applicable to STM32 platform and has been tested in practice)

Wiegand 26/34转RS485、RS232信号转换模块（原理图+PCB+BOM）,输入韦根信号，转换为串口输出(Wiegand 26/34 to RS485, RS232 signal conversion module (schematic + PCB + BOM), input Wiegand signal, converted to serial output)