Revision 148:4802eb17e82b, committed 2016-10-17

Comitter:

rodriguise

Date:

Mon Oct 17 18:47:01 2016 +0000

Parent:

147:30b64687e01f

Commit message:

backup

Changed in this revision

--- a/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_rcc.h	Fri Sep 16 16:24:25 2016 +0100
+++ b/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_rcc.h	Mon Oct 17 18:47:01 2016 +0000
@@ -163,7 +163,7 @@
   * @{
   */
 #define RCC_DBP_TIMEOUT_VALUE          ((uint32_t)2U)    /* 2 ms (minimum Tick + 1) */
-#define RCC_LSE_TIMEOUT_VALUE          LSE_STARTUP_TIMEOUT
+#define RCC_LSE_TIMEOUT_VALUE          ((uint32_t)5000) // LSE_STARTUP_TIMEOUT
 /**
   * @}
   */

--- a/targets/hal/TARGET_STM/TARGET_STM32L4/device.h	Fri Sep 16 16:24:25 2016 +0100
+++ b/targets/hal/TARGET_STM/TARGET_STM32L4/device.h	Mon Oct 17 18:47:01 2016 +0000
@@ -37,4 +37,6 @@
 
 #include "objects.h"
 
+#define DEVICE_RTC_LSI          0 
+
 #endif

--- a/targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c	Fri Sep 16 16:24:25 2016 +0100
+++ b/targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c	Mon Oct 17 18:47:01 2016 +0000
@@ -28,31 +28,40 @@
  *******************************************************************************
  */
 #include "rtc_api.h"
-
+ 
 #if DEVICE_RTC
-
+ 
 #include "mbed_error.h"
-
-#if DEVICE_RTC_LSI
-static int rtc_inited = 0;
-#endif
-
+ 
+#if DEVICE_RTC_LSI 
+ static int rtc_inited = 0; 
+#endif 
+ 
 static RTC_HandleTypeDef RtcHandle;
-
+ 
 void rtc_init(void)
 {
     RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
     uint32_t rtc_freq = 0;
-
-#if DEVICE_RTC_LSI
-    if (rtc_inited) return;
-    rtc_inited = 1;
-#endif
-
+    
+#if DEVICE_RTC_LSI  
+    rtc_inited = 1;  
+#endif  
+ 
     RtcHandle.Instance = RTC;
-
-#if !DEVICE_RTC_LSI
+ 
+    // Enable Power clock
+    __HAL_RCC_PWR_CLK_ENABLE();
+ 
+    // Enable access to Backup domain
+    HAL_PWR_EnableBkUpAccess();
+ 
+    // Reset Backup domain
+    __HAL_RCC_BACKUPRESET_FORCE();
+    __HAL_RCC_BACKUPRESET_RELEASE();
+ 
+ 
     // Enable LSE Oscillator
     RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
     RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
@@ -64,73 +73,60 @@
         PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
         HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
         rtc_freq = LSE_VALUE;
-    } else {
-        error("Cannot initialize RTC with LSE\n");
+    }
+    else {
+      error("RTC error: LSE clock initialization failed.");
     }
 #else
-    // Enable Power clock
-    __HAL_RCC_PWR_CLK_ENABLE();
-
-    // Enable access to Backup domain
-    HAL_PWR_EnableBkUpAccess();
-
-    // Reset Backup domain
-    __HAL_RCC_BACKUPRESET_FORCE();
-    __HAL_RCC_BACKUPRESET_RELEASE();
-
-    // Enable LSI clock
-    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
-    RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
-    RCC_OscInitStruct.LSEState       = RCC_LSE_OFF;
-    RCC_OscInitStruct.LSIState       = RCC_LSI_ON;
-    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
-        error("Cannot initialize RTC with LSI\n");
+        // Enable LSI clock
+        RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
+        RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_NONE; // Mandatory, otherwise the PLL is reconfigured!
+        RCC_OscInitStruct.LSEState       = RCC_LSE_OFF;
+        RCC_OscInitStruct.LSIState       = RCC_LSI_ON;
+        if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+            error("Cannot initialize RTC with LSI\n");
+        }
+        // Connect LSI to RTC
+        PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
+        PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
+        if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
+            error("Cannot initialize RTC with LSI\n");
+        }
+        // This value is LSI typical value. To be measured precisely using a timer input capture for example.
+        rtc_freq = 40000;
     }
-    // Connect LSI to RTC
-    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
-    PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
-    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
-        error("Cannot initialize RTC with LSI\n");
-    }
-    // This value is LSI typical value (see device datasheet)
-    rtc_freq = 32000;
 #endif
-
-    // Check if RTC is already initialized
-    if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return;
-
+ 
     // Enable RTC
     __HAL_RCC_RTC_ENABLE();
-
+ 
     RtcHandle.Init.HourFormat     = RTC_HOURFORMAT_24;
     RtcHandle.Init.AsynchPrediv   = 127;
     RtcHandle.Init.SynchPrediv    = (rtc_freq / 128) - 1;
     RtcHandle.Init.OutPut         = RTC_OUTPUT_DISABLE;
     RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
     RtcHandle.Init.OutPutType     = RTC_OUTPUT_TYPE_OPENDRAIN;
-
+ 
     if (HAL_RTC_Init(&RtcHandle) != HAL_OK) {
         error("Cannot initialize RTC\n");
     }
 }
-
+ 
 void rtc_free(void)
 {
-#if DEVICE_RTC_LSI
     // Enable Power clock
     __HAL_RCC_PWR_CLK_ENABLE();
-
+ 
     // Enable access to Backup domain
     HAL_PWR_EnableBkUpAccess();
-
+ 
     // Reset Backup domain
     __HAL_RCC_BACKUPRESET_FORCE();
     __HAL_RCC_BACKUPRESET_RELEASE();
-
+ 
     // Disable access to Backup domain
     HAL_PWR_DisableBkUpAccess();
-#endif
-
+ 
     // Disable LSI and LSE clocks
     RCC_OscInitTypeDef RCC_OscInitStruct;
     RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
@@ -138,25 +134,23 @@
     RCC_OscInitStruct.LSIState       = RCC_LSI_OFF;
     RCC_OscInitStruct.LSEState       = RCC_LSE_OFF;
     HAL_RCC_OscConfig(&RCC_OscInitStruct);
-
 #if DEVICE_RTC_LSI
     rtc_inited = 0;
 #endif
+ 
 }
-
+ 
 int rtc_isenabled(void)
 {
 #if DEVICE_RTC_LSI
-  return rtc_inited;
+    return rtc_inited;
 #else
-  if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) {
-    return 1;
-  } else {
-    return 0;
-  }
+  if ((RTC->ISR & RTC_ISR_INITS) ==  RTC_ISR_INITS) return 1;
+  else return 0;
 #endif
+ 
 }
-
+ 
 /*
  RTC Registers
    RTC_WeekDay 1=monday, 2=tuesday, ..., 7=sunday
@@ -179,56 +173,58 @@
     RTC_DateTypeDef dateStruct;
     RTC_TimeTypeDef timeStruct;
     struct tm timeinfo;
-
+ 
     RtcHandle.Instance = RTC;
-
+ 
     // Read actual date and time
     // Warning: the time must be read first!
     HAL_RTC_GetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN);
     HAL_RTC_GetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN);
-
+ 
     // Setup a tm structure based on the RTC
     timeinfo.tm_wday = dateStruct.WeekDay;
     timeinfo.tm_mon  = dateStruct.Month - 1;
     timeinfo.tm_mday = dateStruct.Date;
-    timeinfo.tm_year = dateStruct.Year + 68;
+    timeinfo.tm_year = dateStruct.Year + 100;
     timeinfo.tm_hour = timeStruct.Hours;
     timeinfo.tm_min  = timeStruct.Minutes;
     timeinfo.tm_sec  = timeStruct.Seconds;
-    // Daylight Saving Time information is not available
-    timeinfo.tm_isdst = -1;
-
+ 
     // Convert to timestamp
     time_t t = mktime(&timeinfo);
-
+ 
     return t;
 }
-
+ 
 void rtc_write(time_t t)
 {
     RTC_DateTypeDef dateStruct;
     RTC_TimeTypeDef timeStruct;
-
+ 
     RtcHandle.Instance = RTC;
-
+    
+     // Enable Power clock
+    __HAL_RCC_PWR_CLK_ENABLE();
+ 
+    // Enable access to Backup domain
+    HAL_PWR_EnableBkUpAccess();
+ 
     // Convert the time into a tm
     struct tm *timeinfo = localtime(&t);
-
+ 
     // Fill RTC structures
     dateStruct.WeekDay        = timeinfo->tm_wday;
     dateStruct.Month          = timeinfo->tm_mon + 1;
     dateStruct.Date           = timeinfo->tm_mday;
-    dateStruct.Year           = timeinfo->tm_year - 68;
+    dateStruct.Year           = timeinfo->tm_year - 100;
     timeStruct.Hours          = timeinfo->tm_hour;
     timeStruct.Minutes        = timeinfo->tm_min;
     timeStruct.Seconds        = timeinfo->tm_sec;
-    timeStruct.TimeFormat     = RTC_HOURFORMAT_24;
+    timeStruct.TimeFormat     = RTC_HOURFORMAT12_PM;
     timeStruct.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
     timeStruct.StoreOperation = RTC_STOREOPERATION_RESET;
-
+ 
     // Change the RTC current date/time
     HAL_RTC_SetDate(&RtcHandle, &dateStruct, RTC_FORMAT_BIN);
     HAL_RTC_SetTime(&RtcHandle, &timeStruct, RTC_FORMAT_BIN);
-}
-
-#endif
+}
\ No newline at end of file