teralytic
mbed library sources. Supersedes mbed-src.
Diff: targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 111:86e691153a57
- Child:
- 148:4802eb17e82b
--- a/targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c Tue Aug 02 14:07:36 2016 +0000
+++ b/targets/hal/TARGET_STM/TARGET_STM32L4/rtc_api.c Fri Sep 02 15:07:44 2016 +0100
@@ -1,232 +1,234 @@
-/* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2015, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *******************************************************************************
- */
-#include "rtc_api.h"
-
-#if DEVICE_RTC
-
-#include "mbed_error.h"
-
-#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
-
- RtcHandle.Instance = RTC;
-
-#if !DEVICE_RTC_LSI
- // 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!
- RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
- RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { // Check if LSE has started correctly
- // Connect LSE to RTC
- PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
- PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
- HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
- rtc_freq = LSE_VALUE;
- } else {
- error("Cannot initialize RTC with LSE\n");
- }
-#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");
- }
- // 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;
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
- 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;
-#else
- 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
- RTC_Month 1=january, 2=february, ..., 12=december
- RTC_Date day of the month 1-31
- RTC_Year year 0-99
- struct tm
- tm_sec seconds after the minute 0-61
- tm_min minutes after the hour 0-59
- tm_hour hours since midnight 0-23
- tm_mday day of the month 1-31
- tm_mon months since January 0-11
- tm_year years since 1900
- tm_wday days since Sunday 0-6
- tm_yday days since January 1 0-365
- tm_isdst Daylight Saving Time flag
-*/
-time_t rtc_read(void)
-{
- 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 + 100;
- timeinfo.tm_hour = timeStruct.Hours;
- timeinfo.tm_min = timeStruct.Minutes;
- timeinfo.tm_sec = timeStruct.Seconds;
-
- // 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;
-
- // 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 - 100;
- timeStruct.Hours = timeinfo->tm_hour;
- timeStruct.Minutes = timeinfo->tm_min;
- timeStruct.Seconds = timeinfo->tm_sec;
- 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
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2015, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#include "rtc_api.h"
+
+#if DEVICE_RTC
+
+#include "mbed_error.h"
+
+#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
+
+ RtcHandle.Instance = RTC;
+
+#if !DEVICE_RTC_LSI
+ // 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!
+ RCC_OscInitStruct.LSEState = RCC_LSE_ON; // External 32.768 kHz clock on OSC_IN/OSC_OUT
+ RCC_OscInitStruct.LSIState = RCC_LSI_OFF;
+ if (HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) { // Check if LSE has started correctly
+ // Connect LSE to RTC
+ PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
+ PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
+ HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
+ rtc_freq = LSE_VALUE;
+ } else {
+ error("Cannot initialize RTC with LSE\n");
+ }
+#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");
+ }
+ // 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;
+ RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+ 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;
+#else
+ 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
+ RTC_Month 1=january, 2=february, ..., 12=december
+ RTC_Date day of the month 1-31
+ RTC_Year year 0-99
+ struct tm
+ tm_sec seconds after the minute 0-61
+ tm_min minutes after the hour 0-59
+ tm_hour hours since midnight 0-23
+ tm_mday day of the month 1-31
+ tm_mon months since January 0-11
+ tm_year years since 1900
+ tm_wday days since Sunday 0-6
+ tm_yday days since January 1 0-365
+ tm_isdst Daylight Saving Time flag
+*/
+time_t rtc_read(void)
+{
+ 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_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;
+
+ // 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;
+ timeStruct.Hours = timeinfo->tm_hour;
+ timeStruct.Minutes = timeinfo->tm_min;
+ timeStruct.Seconds = timeinfo->tm_sec;
+ timeStruct.TimeFormat = RTC_HOURFORMAT_24;
+ 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