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[Other] TimeOfSecond DL : 0: 把一个年、月、日、时、分、秒的时间转换为一个基于1970年1月1日0时0分0秒的秒数；或者把一个基于1970年1月1日0时0分0秒的秒数转换为一个年、月、日、时、分、秒的时间。本源码考虑了闰年因素的影响。在嵌入式开发中，当没有RTC时，这种转换非常有用，可以比较容易地维持一个系统时间。-put a year, month, day and hour, minute and second time for a change based on at 0:00 a.m. on January 1, 1970 0 0 seconds seconds; Or one based at 12:00 a.m. on January 1, 1970 0 0 seconds concurrently converted to a year, month, day and hour - and second time. Consider the source of the impact of a leap year. In embedded development, in the absence of the RTC, such a conversion is very useful, it is easier to maintain a system of time.
Date : 2008-10-13 Size : 7.44kb User : 小罗
[Other] ethernet_basics DL : 0: Ethernet has become the predominant method for connecting devices in home and office environments over the last decade. Originally developed in the 1970’s by XEROX, it has become an IEEE standard 802.3
Date : 2008-10-13 Size : 235.13kb User : charles