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基于合泰单片机HT66F70A的一个实时时钟程序，利用定时器1，利用外部低速振荡器作为时钟源。(Based on a Thai microcontroller HT66F70A of a real-time clock program, using a timer 1, the use of external low speed oscillator as a clock source.)

89c51时钟，通过液晶屏显示 还可以通过按键设置时间(89C51 clock, through LCD screen display, you can also set time by key.)

说明：  PID控制pwm风扇，可吹小球，附带激光测距，可通过LCD显示(PID control PWM fan, can blow small ball, with laser ranging, can be displayed by LCD)

STM32 spi dma算法，STM32 f103网上找的两个例程(STM32 spi dma Algorithms, two routines for searching STM32 F103)

Analysis of Map-Reduce data of two Hadoop cases, flow, application

说明：  stm32平衡车源代码 超声波避障 红外寻迹 WiFi控制(balancing car 123447668793.)

ST7789S-G4A的初始化代码，该IC能够零电容实现2.8寸TFT屏驱动(ST7789S-G4A initialization code, the IC can achieve zero capacitance drive 2.8 inch TFT screen)

CASIO350TL计算器的说明书，按键的基本功能可以实现。(CASIO350TL calculator specification, basic function keys can be achieved.)

用KeilC编写的，在51单片机上运行的能够正确对zigbee串口通信控制的程序。(Written in KeilC, running on the 51 single-chip microcomputer can correctly control the serial communication of ZigBee program.)