buckboost正激反激

本作品是基于stm32检测温湿度，可以通过串口观察实时状态。(This work is based on stm32 detection temperature and humidity, you can observe the real-time status through the serial port.)

单片机双串口程序，寄存器的设置，源代码，适用适用两个串口的应用。(SCM Two serial program, register set, the source code for the application for the two serial ports.)

数字电子时钟是一种使用数字电路技术实现时钟、分钟和秒钟定时的设备。 它在其他电子时钟中具有更高的准确性和主观性。数字钟包含扩展功能和基本功能。其中，基本功能部分：以数字形式准确定时，显示时、分、秒的功能; 扩展功能部分： 日期显示、闹钟、温度显示。(A digital electronic clock is a device that uses digital circuit technology to achieve clock, minute, and second timing. It has higher accuracy and subjectivity in other electronic clocks. The digital clock has two parts, basic functions and extended functions. Among them, the basic function part: accurate timing in digital form, display hours, minutes, seconds function; extended function part: date display, alarm clock, temperature display.)

基于430的AD9954驱动程序，单频，FSK等全有。(430 AD9954 driver, single-frequency, FSK, such as whole.)

用12864加STC12C5A60S2做的GPS解析(GPS Analysis with 12864 and STC12C5A60S2)

说明：  使用STM32的普通引脚软件模拟SPI通信，通过软件SPI操作WQ2516，已测试验证过！(Using STM32's general pin software to simulate SPI communication and operate WQ2516 through software SPI, it has been tested and verified.)

通过定时器在时间上合理的安排，快速准确的对红外遥控器进行操作，同时大大的减少了时间上的消耗，并将此工程封装，便于以后的直接调用(Called directly by a timer set at a reasonable time, the fast and accurate infrared remote control to operate, while greatly reducing the consumption of time, and to this engineering package to facilitate future)

实现简单自动售货机的基本功能。投币找零功能，并用Led数码管显示，输出结果用Led显示。(Basic functions simple vending machines. Coin change for function and use Led digital tube display, the output display Led.)

说明：  基于51单片机，芯片stc89c52,使用PCF8591ad转换器的源代码(Based on 51 MCU, chip stc89c52, using PCF8591ad converter source code)

emmc 4.5底层代码，用于新手学习 练手。(emmc code for study)