RTC8564NB Clock
Import programRTC8564NB_Clock
This is the clock which used highly quality RTC module RT8564NB. This module is I2C controllable. At the time of poweron/reset, the start time received from ntp server. See: http://blogs.yahoo.co.jp/jf1vrr_station/19895596.html (Japanese)
Last commit 27 Apr 2011 by 
masa miya
The mbed has RTC built-in, but I served as the study of the I2C interface and made the clock which I used RTC8564NB connected external RTC.
An ethernet connection function and the LCD use a circuit of StarBoard Orenge.
Start time is obtained from ntp server at the start time. You can set just time every hour when you push the hour justify button with the time signal at the time.
After having initialized RTC at the time of start, mbed leave the update of the time to RTC. The mbed gets data from RTC at the time on a date every 0.5 seconds and only displays it to LCD.
This program does not use the interrupt in a period of alarm function and interval function like 1Hz.
RTC8564NB is a product of SeikoEpson, but the thing which made a module of 8 pin DIP to be easy to use it is sold by Akizukidenshitsusho.
There is the blog[http://blogs.yahoo.co.jp/jf1vrr_station/19895596.html] which I commented on in Japanese.
de JF1VRR
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