UART

超声波测距，可以通过串口助手显示，当小于设定值时，显示0，当大于设定值时，显示1(Ultrasonic Ranging, through serial aides showed that when less than the set value, 0, when greater than the set value, indicating a)

说明：  我的stm32f4学习历程，很好的入门学习资料！(My stm32f4 learning process, a good introductory learning materials!)

this program for student. toturial for gpio stm

说明：  此程序是LPC2119两路CAN程序 ，已经成熟用在产品上 并且很稳定(This program is CAN LPC2119 two procedures used in the product is mature and very stable)

LCD液晶显示程序，在AT89S52上运行成功，其也可以用于其 他的处理器(LCD liquid crystal display program, run on AT89S52 is successful, it can also be used for the processor)

MDK环境下实现STM32F105,双CAN中继的功能。(MDK environment the STM32F105, CAN relay function.)

STM32F103控制蜂鸣器鸣叫，基于keil4软件(STM32F103 Control Buzzer)

BH1750光强传感器测光控制，TIP-Camera-CGI(BH1750 light intensity sensor metering control, TIP-Camera-CGI)

An ecological acoustic recorder (EAR) for long-term monitoring of biological and anthropogenic sounds on coral reefs and other marine habitats

当温控开关打开时，若测得环境温度大于设定温度，则继电器吸合 启动电机工作；若测得环境温度小于设定温度，则继电器释放， 电机停止工作；(When the temperature control switch is turned on, if the measured ambient temperature is higher than the set temperature, the relay will suck in. Start the motor; if the measured ambient temperature is less than the set temperature, the relay will be released. The motor stopped working.)