Import Mbed OS hard-float snapshot

targets/TARGET_STM/rtc_api_hal.h

@@ -0,0 +1,96 @@
+/* mbed Microcontroller Library
+*******************************************************************************
+* Copyright (c) 2018, 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.
+*******************************************************************************
+*/
+
+#ifndef MBED_RTC_API_HAL_H
+#define MBED_RTC_API_HAL_H
+
+#include "rtc_api.h"
+#include "lp_ticker_api.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if MBED_CONF_TARGET_LSE_AVAILABLE
+#define RTC_CLOCK LSE_VALUE
+#else
+#define RTC_CLOCK LSI_VALUE
+#endif
+
+#if DEVICE_LPTICKER && !MBED_CONF_TARGET_LPTICKER_LPTIM
+/* PREDIV_A : 7-bit asynchronous prescaler */
+/* PREDIV_A is set to set LPTICKER frequency to RTC_CLOCK/4 */
+#define PREDIV_A_VALUE 3
+
+/** Read RTC counter with sub second precision
+ *
+ * @return LP ticker counter
+ */
+uint32_t rtc_read_lp(void);
+
+/** Program a wake up timer event
+ *
+ * @param timestamp: counter to set
+ */
+void rtc_set_wake_up_timer(timestamp_t timestamp);
+
+/** Call RTC Wake Up IT
+ */
+void rtc_fire_interrupt(void);
+
+/** Disable the wake up timer event.
+ *
+ * The wake up timer use auto reload, you have to deactivate it manually.
+ */
+void rtc_deactivate_wake_up_timer(void);
+
+#else /* DEVICE_LPTICKER && !MBED_CONF_TARGET_LPTICKER_LPTIM */
+
+/* PREDIV_A : 7-bit asynchronous prescaler */
+/* PREDIV_A is set to the maximum value to improve the consumption */
+#define PREDIV_A_VALUE 127
+
+#endif /* DEVICE_LPTICKER && !MBED_CONF_TARGET_LPTICKER_LPTIM */
+
+/* PREDIV_S : 15-bit synchronous prescaler */
+/* PREDIV_S is set in order to get a 1 Hz clock */
+#define PREDIV_S_VALUE (RTC_CLOCK / (PREDIV_A_VALUE + 1) - 1)
+
+/** Synchronise the RTC shadow registers.
+ *
+ * Must be called after a deepsleep.
+ */
+void rtc_synchronize(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif