20140821

液晶控制芯片RA8803的英文资料,及应用笔记。(LCD control chip RA8803 information in English and Application Notes.)

说明：  基于stm32f103zet6单片机的超声波测距(Ultrasonic ranging based on stm32f103zet6 single chip computer)

说明：  基于stm32f103的多路ADC采集，将采集的电压传入到DMA设定的内存中，在通过均值滤波得到比较准确的数据(Based on the multi-channel ADC acquisition of stm32f103, the collected voltage is transferred to the memory set by DMA, and the more accurate data are obtained by means of mean filter.)

说明：  四位共阴数码管显示实验（段选＋位选）代码 适用于STM32F103单片机(Four common negative digital display experiment (segment selection + bit selection) Suitable for STM32F103 MCU)

说明：  基于STM32F429实现以太网应用--LWIP移植(无操作系统)(Implementation of Ethernet Application Based on STM32F429--LWIP Porting (No Operating System))

PLC基础及应用第2版廖常初主编 参考答案 （注未经允许禁止转载！）(PLC basic and applied 2nd Edition Liao Chang, editor suggested answers (note reproduced without permission prohibited!))

使用数码管和AT24C02实现： 1、数码管从0显示到99，溢出后从0循环显示，时间间隔为一秒。 2、显示到某个数时突然关闭电源，AT24C02将保存当前的数字。 3、重新启动后数码管会接着上次的数继续显示(Using digital tube and AT24C02 implementation: 1, the digital tube displays from 0 to 99. After overflow, it displays from 0 cycles, with a time interval of one second. 2, display a number of time to turn off the power suddenly, AT24C02 will save the current number. 3, after reboot, the number will continue to display.)

100% 可以运行的温湿度显示软件，数据保存在数据库之间的通信 串口通信(100% operational temperature and humidity display software, data stored in the database communication serial port)

If there are no Klingons in this quadrant, we nullify any distress calls which might exist.

Call Log Provider extends Content Provider for Andriod.