Diff: targets/TARGET_STM/TARGET_STM32L1/sleep.c

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/TARGET_STM32L1/sleep.c	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,100 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2014, 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 "sleep_api.h"
+#include "hal_tick.h"
+#include "rtc_api_hal.h"
+
+#if DEVICE_SLEEP
+
+#include "cmsis.h"
+
+static TIM_HandleTypeDef TimMasterHandle;
+
+void sleep(void) {
+    // Stop HAL systick
+    HAL_SuspendTick();
+    // Request to enter SLEEP mode
+    HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
+    // Restart HAL systick
+    HAL_ResumeTick();
+}
+
+
+void deepsleep(void)
+{
+#if defined(TARGET_MOTE_L152RC)
+    int8_t STOPEntry = PWR_STOPENTRY_WFI;
+#endif
+
+    // Stop HAL systick
+    TimMasterHandle.Instance = TIM_MST;
+
+#if defined(TARGET_MOTE_L152RC)
+    /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
+    MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
+
+    /* Set SLEEPDEEP bit of Cortex System Control Register */
+    SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
+
+    /* Select Stop mode entry --------------------------------------------------*/
+    if(STOPEntry == PWR_STOPENTRY_WFI)
+    {
+        /* Request Wait For Interrupt */
+        __WFI();
+    }
+    else
+    {
+        /* Request Wait For Event */
+        __SEV();
+        __WFE();
+        __WFE();
+    }
+    __NOP();
+    __NOP();
+    __NOP();
+    /* Reset SLEEPDEEP bit of Cortex System Control Register */
+    CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
+#else
+    // Request to enter STOP mode with regulator in low power mode
+    HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
+#endif
+
+    // After wake-up from STOP reconfigure the PLL
+    SetSysClock();
+
+    // Restart HAL systick
+    HAL_ResumeTick();
+
+#if DEVICE_LOWPOWERTIMER
+    rtc_synchronize();
+#endif
+}
+
+#endif