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1 /* mbed Microcontroller Library
2 *******************************************************************************
3 * Copyright (c) 2014, STMicroelectronics
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *******************************************************************************
29 */
30 #include "sleep_api.h"
31
32 #if DEVICE_SLEEP
33
34 #include "cmsis.h"
35
36 static TIM_HandleTypeDef TimMasterHandle;
37
38 void sleep(void)
39 {
40 // Disable HAL tick interrupt
41 TimMasterHandle.Instance = TIM5;
42 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
43
44 // Request to enter SLEEP mode
45 HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
46
47 // Enable HAL tick interrupt
48 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
49 }
50
51 void deepsleep(void)
52 {
53 #if defined(TARGET_MOTE_L152RC)
54 int8_t STOPEntry = PWR_STOPENTRY_WFI;
55 #endif
56
57 // Disable HAL tick interrupt
58 TimMasterHandle.Instance = TIM5;
59 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
60
61 #if defined(TARGET_MOTE_L152RC)
62 /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
63 MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
64
65 /* Set SLEEPDEEP bit of Cortex System Control Register */
66 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
67
68 /* Select Stop mode entry --------------------------------------------------*/
69 if(STOPEntry == PWR_STOPENTRY_WFI)
70 {
71 /* Request Wait For Interrupt */
72 __WFI();
73 }
74 else
75 {
76 /* Request Wait For Event */
77 __SEV();
78 __WFE();
79 __WFE();
80 }
81 __NOP();
82 __NOP();
83 __NOP();
84 /* Reset SLEEPDEEP bit of Cortex System Control Register */
85 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
86 #else
87 // Request to enter STOP mode with regulator in low power mode
88 HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
89 #endif
90
91 // After wake-up from STOP reconfigure the PLL
92 SetSysClock();
93
94 // Enable HAL tick interrupt
95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
96 }
97
98 #endif
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