STM32 USB clock configuration with STM32F3 support

Fork of STM32_USB48MHz by Norimasa Okamoto

Changes

RevisionDateWhoCommit message
1:c97a4f5cb6cf 2016-09-21 Bradley Scott Add STM32F3 support default tip
0:0c251314fe4b 2015-06-20 va009039 first commit