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Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/rtc_api.c

Revision:
62:7731d679ae64
Parent:
60:142c6c6f5949
Child:
70:c1fbde68b492
--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/rtc_api.c	Tue Dec 17 10:15:06 2013 +0000
+++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/rtc_api.c	Tue Dec 17 11:00:05 2013 +0000
@@ -24,12 +24,18 @@
   
     BKP_DeInit(); // Reset Backup Domain
   
+    // Uncomment these lines if you use the LSE
     // Enable LSE and wait till it's ready
-    RCC_LSEConfig(RCC_LSE_ON);
-    while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
+    //RCC_LSEConfig(RCC_LSE_ON);
+    //while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}     
+    //RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
       
-    RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); // Select LSE as RTC Clock Source
-      
+    // Uncomment these lines if you use the LSI
+    // Enable LSI and wait till it's ready  
+    RCC_LSICmd(ENABLE);
+    while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {}
+    RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); // Select LSI as RTC Clock Source
+  
     RCC_RTCCLKCmd(ENABLE); // Enable RTC Clock 
       
     RTC_WaitForSynchro(); // Wait for RTC registers synchronization
@@ -37,8 +43,9 @@
     RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished
 
     // Set RTC period to 1 sec
-    // RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1)
-    RTC_SetPrescaler(32767);
+    // For LSE: prescaler = RTCCLK/RTC period = 32768Hz/1Hz = 32768
+    // For LSI: prescaler = RTCCLK/RTC period = 40000Hz/1Hz = 40000      
+    RTC_SetPrescaler(39999);
     
     RTC_WaitForLastTask(); // Wait until last write operation on RTC registers has finished