s2

说明：  基于PCF8591的51单片机温度监测系统，串行AD转换，程序已验证可行，显示准确，含proteus仿真文件(Based on PCF8591 51 single chip temperature monitoring system, serial AD conversion, the program has been verified feasible, accurate display, including proteus simulation file.)

建立环状队列保存过去10个键盘状态，利用天然获得的时延，消键抖，防止连续动作，选择响应模式（下键或抬键动作）。还可以防止两键同按引起的误动作，这里主要靠键值识别，两键同下的键值与单键下键的值不同，拒绝之即可。(Create circular queue holds the state over the past 10 steps of the keyboard, using natural available delay, jitter elimination keys, to prevent the continuous action, select the response mode (the key or lift button action). You can also prevent the two key malfunction caused by the same, this is mainly identified by the key, two keys with one-touch keys with the following value under the key difference, the refusal can be.)

说明：  虚拟示波器的设计实线 对数据采集有参考价值(labview teaching)

A C code and hardware for a wall clock

基于cordic算法的DDS的Verilog代码。经过仿真验证，绝对可靠。(Based on cordic algorithm DDS Verilog code. Through the simulation, is absolutely reliable.)

TCS3200传感器捕获方波频率，可以根据频率变化识别外部光源颜色(TCS3200 sensor to capture a square wave frequency, the frequency change can identify the external light source color)

说明：  超声波测量电路设计利用超声波来实现距离、速度、流量、浓度等的检测 ,具有其他检测方法无法比拟的显 优点。(Using ultrasonic ultrasonic measuring circuit to achieve distance, speed, flow, concentration of detection, other detection methods have significant advantages unmatched.)

说明：  在串口中使用DMA来实现数据的快速收发，源码都有，程序编译通过。(The use of DMA in the serial port to achieve rapid data transceiver, source code, program compilation through.)

将工程从stm32f1平台移植到stm32l4平台的方法。(Porting projects from the stm32f1 platform to the stm32l4 platform.)

arduino加速度传感器通信编程，显示，，，(Arduino acceleration sensor communication programming, display,,,)