Check RTC LSE(External Xtal, 32.768kHz) mode

Dependencies:   mbed CheckRTC

Please refer follow links.
My notebook
http://developer.mbed.org/users/kenjiArai/notebook/nucleo-series-clock-structure-and-xtal-oscillation/
Q&A for RTC Xtal
http://developer.mbed.org/questions/4531/RTC-External-Crystal-Nucleo/

Download repository: zip gz

Files at revision 4:56a0cbad89b0

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CheckRTC.lib 70 Revisions Annotate
main.cpp 10686 Revisions Annotate
mbed.bld 65 Revisions Annotate