Kenji Arai / SetRTC

This is a RTC additional function. This is only for Nucleo F401RE & F411RE mbed(Added L152RE, F334R8, L476RG & F746xx). If you connected battery backup circuit for internal RTC, you can make a power-off and reset condition. RTC still has proper time and date.

Dependents:   Nucleo_rtos_sample PB_Emma_Ethernet

Please refer following NOTE information.
/users/kenjiArai/notebook/nucleo-series-rtc-control-under-power-onoff-and-re/

Diff: SetRTC.cpp

Revision:
9:1af4e107ca7b
Parent:
6:ef7d2c83034d
Child:
10:16ee1c956319
--- a/SetRTC.cpp	Thu Feb 19 02:56:12 2015 +0000
+++ b/SetRTC.cpp	Sat May 23 21:07:12 2015 +0000
@@ -7,7 +7,7 @@
  *  http://www.page.sannet.ne.jp/kenjia/index.html
  *  http://mbed.org/users/kenjiArai/
  *      Created:  October   24th, 2014
- *      Revised:  Feburary  19th, 2015
+ *      Revised:  May       24th, 2015
  *
  * 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
@@ -16,7 +16,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE) || defined(TARGET_NUCLEO_L152RE)
+#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE) \
+ || defined(TARGET_NUCLEO_L152RE) || defined(TARGET_NUCLEO_F334R8)
 
 //#define DEBUG         // use Communication with PC(UART)
 
@@ -109,7 +110,7 @@
     timeout = HAL_GetTick() + TIMEOUT;
     PRINTF("Time-Out %d\r\n", timeout);
     // Wait till LSE is ready
-#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE)
+#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE)|| defined(TARGET_NUCLEO_F334R8)
     while((RCC->BDCR & 0x02) != 2){
 #else
     while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET) {
@@ -159,7 +160,9 @@
         }
     }
     // Connect LSI to RTC
+#if !defined(TARGET_NUCLEO_F334R8)
     __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSI);
+#endif
     __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSI);
     return 1;
 }
@@ -176,7 +179,7 @@
     HAL_PWR_EnableBkUpAccess();
     // Check backup condition
     if ( check_RTC_backup_reg() ) {
-#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE)
+#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE) || defined(TARGET_NUCLEO_F334R8)
         if ((RCC->BDCR & 0x8307) == 0x8103){
 #else
         if ((RCC->CSR & 0x430703) == 0x410300) {
@@ -204,7 +207,9 @@
     // Enable LSE Oscillator
     if (set_RTC_LSE() == 1) {
         // Connect LSE to RTC
+#if !defined(TARGET_NUCLEO_F334R8)
         __HAL_RCC_RTC_CLKPRESCALER(RCC_RTCCLKSOURCE_LSE);
+#endif
         __HAL_RCC_RTC_CONFIG(RCC_RTCCLKSOURCE_LSE);
         PRINTF("Set LSE/External\r\n");
         return 1;
@@ -252,9 +257,11 @@
     pcr.printf( " ISR   =0x...%05x, PRER  =0x..%06x, WUTR  =0x....%04x\r\n",
                 RTC->ISR, RTC->PRER, RTC->WUTR
               );
+#if !defined(TARGET_NUCLEO_F334R8)
     pcr.printf( " CALIBR=0x....%04x, ALRMAR=0x%08x, ALRMBR=0x%08x\r\n",
                 RTC->CALIBR, RTC->ALRMAR, RTC->ALRMBR
               );
+#endif
     pcr.printf(
         " WPR   =0x......%02x, SSR   =0x....%04x, SHIFTR=0x....%04x\r\n",
         RTC->WPR, RTC->SSR, RTC->SHIFTR
@@ -264,7 +271,7 @@
         RTC->TSTR, RTC->TSDR, RTC->TSSSR
     );
     pcr.printf( "Show RCC registers (only RTC Related reg.)\r\n" );
-#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE)
+#if defined(TARGET_NUCLEO_F401RE) || defined(TARGET_NUCLEO_F411RE) || defined(TARGET_NUCLEO_F334R8)
     pcr.printf( " RCC_BDCR=0x...%05x\r\n", RCC->BDCR);
 #else
     pcr.printf( " RCC_CSR =0x%08x\r\n", RCC->CSR);
@@ -539,6 +546,6 @@
 }
 #endif  // defined(TARGET_NUCLEO_L152RE)
 
-#else   // defined(TARGET_NUCLEO_F401RE,TARGET_NUCLEO_F411RE,TARGET_NUCLEO_L152RE)
+#else   // defined(TARGET_NUCLEO_F401RE,_F411RE,_L152RE,_F334R8)
 #error "No suport this mbed, only for Nucleo mbed"
-#endif  // defined(TARGET_NUCLEO_F401RE,TARGET_NUCLEO_F411RE,TARGET_NUCLEO_L152RE)
+#endif  // defined(TARGET_NUCLEO_F401RE,_F411RE,_L152RE,_F334R8)