Test_ifnonnull

灯光控制开发原理图PCB成功按理.方便大家进行学习.(MNB)

说明：  本Demo功能是通过通用IO模拟串口数据收发，适用于所使用的单片机没有足够的串口的情况下进行拓展，已使用到公司项目(The demo function is to simulate the data receiving and sending of serial port through general IO, which is applicable to the expansion of the single chip microcomputer without enough serial port, and has been used in the company project)

codelock with IR key (receiver and transmitter)

19264驱动显示数字，ASCII，汉字，代码简洁，注释清晰。STC12C5A60S2芯片(19264 drivers display Numbers, ASCII, Chinese characters, the code is concise, clear comments. STC12C5A60S2 chip )

使用陀螺仪采集加速度、角速度、姿态角、温度、计步等数据，并上传到“匿名上位机”进行姿态显示。 本工程是移植自MPU6050官方驱动，包含了陀螺仪最完整的功能。(The use of gyro acquisition acceleration, angular velocity, attitude angle, temperature, and other data, and upload to the anonymous host computer attitude display. This project is a transplant the MPU6050 official driver, including the most complete function of the gyroscope.)

说明：  万能的12864显示驱动程序，稍加修改可应用于多种单片机(Almighty 12864 display driver, slightly modified can be used in a variety of SCM)

hdb3码编解码仿真，hdb3码的编解码程序，会自动合成图(hdb3 encoding and decoding simulation)

温度传感器18b20用C51控制，可以实现功能。操作简单，程序易懂适合入门(Temperature sensor 18b20 with C51 control function can be achieved. Simple, easy to understand procedures for entry)

循环点亮P1口，但是所有的灯没有全灭，开发环境为HEIL(Circular light P1 mouth)

说明：  电子标签读写器程序(示例类源程序，具有较好的参考作用)(RFID reader program (sample type source, has a good reference))