Check program for STM32F303K8 System Clock

Dependencies:   mbed

Fork of study_step0 by Team_PjL

See
https://os.mbed.com/users/kenjiArai/notebook/nucleo-f303k8-hse-clock/#

Revision:
3:5cba8c19a04b
Parent:
2:68db9770a517
--- a/sys_clk.cpp	Sat Sep 30 21:12:20 2017 +0000
+++ b/sys_clk.cpp	Sat Sep 30 21:14:14 2017 +0000
@@ -40,7 +40,7 @@
 // Original source file -> stm32f3xx_hal_rcc.c
 // \targets\TARGET_STM\TARGET_STM32F3\device\
 
-// Modified by JH1PJL 2017-9-30
+// Modified by JH1PJL October 1st, 2017
 
 #include "mbed.h"
 #include "stm32f3xx.h"