Checking program for RTC module inside CPU.

Dependents:   RTC_w_COM Frequency_Counter_w_GPS_1PPS debug_tools Nucleo_RTC_Clock_setting ... more

Please refer below link.
http://developer.mbed.org/users/kenjiArai/notebook/nucleo-series-clock-structure-and-xtal-oscillation/

Revision:
0:01ddb8e35845
Child:
1:921a188e61c0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CheckRTC.h	Sat Nov 01 00:03:16 2014 +0000
@@ -0,0 +1,55 @@
+/*
+ * mbed Library program
+ *      Check RTC function and set proper clock if we can set
+ *      ONLY FOR "Nucleo Board"
+ *
+ *  Copyright (c) 2010-2014 Kenji Arai / JH1PJL
+ *  http://www.page.sannet.ne.jp/kenjia/index.html
+ *  http://mbed.org/users/kenjiArai/
+ *      Created:  October   24th, 2014
+ *      Revised:  November   1st, 2014
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
+ * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef CHECK_RTC_H
+#define CHECK_RTC_H
+
+#include "mbed.h"
+
+#define TIMEOUT         ((uint32_t)5000)
+
+enum {
+    UNKNOWN = -1,
+    NG =0,
+    OK
+};
+
+/** Checking program for RTC module inside CPU
+ *      Latest Nucleo board has external LSE Crystal X2 but no proper setting both HW ans SW
+ *      This program intends to use RTC with X2
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "CheckRTC.h"
+ *
+ * int main() {
+ *   time_t seconds;
+ *
+ *   CheckRTC();
+ *   printf("Time: %s", ctime(&seconds));
+ * }
+ * @endcode
+ */
+
+/** Check and Set RTC
+  * @param none
+  * @return if proper setting = OK, if not = NG and UNKNOWN-> no support this program
+  */
+int32_t CheckRTC(void);
+
+#endif      // CHECK_RTC_H