mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

hal/mbed_sleep_manager.c@181:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
181:57724642e740
Parent:
174:b96e65c34a4d
Child:
184:08ed48f1de7f
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 174:b96e65c34a4d 1 /* mbed Microcontroller Library
AnnaBridge 174:b96e65c34a4d 2 * Copyright (c) 2017 ARM Limited
AnnaBridge 174:b96e65c34a4d 3 *
AnnaBridge 174:b96e65c34a4d 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 174:b96e65c34a4d 5 * you may not use this file except in compliance with the License.
AnnaBridge 174:b96e65c34a4d 6 * You may obtain a copy of the License at
AnnaBridge 174:b96e65c34a4d 7 *
AnnaBridge 174:b96e65c34a4d 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 174:b96e65c34a4d 9 *
AnnaBridge 174:b96e65c34a4d 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 174:b96e65c34a4d 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 174:b96e65c34a4d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 174:b96e65c34a4d 13 * See the License for the specific language governing permissions and
AnnaBridge 174:b96e65c34a4d 14 * limitations under the License.
AnnaBridge 174:b96e65c34a4d 15 */
AnnaBridge 174:b96e65c34a4d 16
AnnaBridge 174:b96e65c34a4d 17 #include "mbed_sleep.h"
AnnaBridge 174:b96e65c34a4d 18 #include "mbed_critical.h"
AnnaBridge 174:b96e65c34a4d 19 #include "sleep_api.h"
AnnaBridge 174:b96e65c34a4d 20 #include "mbed_error.h"
AnnaBridge 174:b96e65c34a4d 21 #include <limits.h>
AnnaBridge 174:b96e65c34a4d 22
AnnaBridge 174:b96e65c34a4d 23 #if DEVICE_SLEEP
AnnaBridge 174:b96e65c34a4d 24
AnnaBridge 174:b96e65c34a4d 25 // deep sleep locking counter. A target is allowed to deep sleep if counter == 0
AnnaBridge 174:b96e65c34a4d 26 static uint16_t deep_sleep_lock = 0U;
AnnaBridge 174:b96e65c34a4d 27
AnnaBridge 174:b96e65c34a4d 28 void sleep_manager_lock_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 29 {
AnnaBridge 174:b96e65c34a4d 30 core_util_critical_section_enter();
AnnaBridge 174:b96e65c34a4d 31 if (deep_sleep_lock == USHRT_MAX) {
AnnaBridge 174:b96e65c34a4d 32 core_util_critical_section_exit();
AnnaBridge 174:b96e65c34a4d 33 error("Deep sleep lock would overflow (> USHRT_MAX)");
AnnaBridge 174:b96e65c34a4d 34 }
AnnaBridge 174:b96e65c34a4d 35 core_util_atomic_incr_u16(&deep_sleep_lock, 1);
AnnaBridge 174:b96e65c34a4d 36 core_util_critical_section_exit();
AnnaBridge 174:b96e65c34a4d 37 }
AnnaBridge 174:b96e65c34a4d 38
AnnaBridge 174:b96e65c34a4d 39 void sleep_manager_unlock_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 40 {
AnnaBridge 174:b96e65c34a4d 41 core_util_critical_section_enter();
AnnaBridge 174:b96e65c34a4d 42 if (deep_sleep_lock == 0) {
AnnaBridge 174:b96e65c34a4d 43 core_util_critical_section_exit();
AnnaBridge 174:b96e65c34a4d 44 error("Deep sleep lock would underflow (< 0)");
AnnaBridge 174:b96e65c34a4d 45 }
AnnaBridge 174:b96e65c34a4d 46 core_util_atomic_decr_u16(&deep_sleep_lock, 1);
AnnaBridge 174:b96e65c34a4d 47 core_util_critical_section_exit();
AnnaBridge 174:b96e65c34a4d 48 }
AnnaBridge 174:b96e65c34a4d 49
AnnaBridge 174:b96e65c34a4d 50 bool sleep_manager_can_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 51 {
AnnaBridge 174:b96e65c34a4d 52 return deep_sleep_lock == 0 ? true : false;
AnnaBridge 174:b96e65c34a4d 53 }
AnnaBridge 174:b96e65c34a4d 54
AnnaBridge 174:b96e65c34a4d 55 void sleep_manager_sleep_auto(void)
AnnaBridge 174:b96e65c34a4d 56 {
AnnaBridge 174:b96e65c34a4d 57 core_util_critical_section_enter();
AnnaBridge 174:b96e65c34a4d 58 // debug profile should keep debuggers attached, no deep sleep allowed
AnnaBridge 174:b96e65c34a4d 59 #ifdef MBED_DEBUG
AnnaBridge 174:b96e65c34a4d 60 hal_sleep();
AnnaBridge 174:b96e65c34a4d 61 #else
AnnaBridge 174:b96e65c34a4d 62 if (sleep_manager_can_deep_sleep()) {
AnnaBridge 174:b96e65c34a4d 63 hal_deepsleep();
AnnaBridge 174:b96e65c34a4d 64 } else {
AnnaBridge 174:b96e65c34a4d 65 hal_sleep();
AnnaBridge 174:b96e65c34a4d 66 }
AnnaBridge 174:b96e65c34a4d 67 #endif
AnnaBridge 174:b96e65c34a4d 68 core_util_critical_section_exit();
AnnaBridge 174:b96e65c34a4d 69 }
AnnaBridge 174:b96e65c34a4d 70
AnnaBridge 174:b96e65c34a4d 71 #else
AnnaBridge 174:b96e65c34a4d 72
AnnaBridge 174:b96e65c34a4d 73 // locking is valid only if DEVICE_SLEEP is defined
AnnaBridge 174:b96e65c34a4d 74 // we provide empty implementation
AnnaBridge 174:b96e65c34a4d 75
AnnaBridge 174:b96e65c34a4d 76 void sleep_manager_lock_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 77 {
AnnaBridge 174:b96e65c34a4d 78
AnnaBridge 174:b96e65c34a4d 79 }
AnnaBridge 174:b96e65c34a4d 80
AnnaBridge 174:b96e65c34a4d 81 void sleep_manager_unlock_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 82 {
AnnaBridge 174:b96e65c34a4d 83
AnnaBridge 174:b96e65c34a4d 84 }
AnnaBridge 174:b96e65c34a4d 85
AnnaBridge 174:b96e65c34a4d 86 bool sleep_manager_can_deep_sleep(void)
AnnaBridge 174:b96e65c34a4d 87 {
AnnaBridge 174:b96e65c34a4d 88 // no sleep implemented
AnnaBridge 174:b96e65c34a4d 89 return false;
AnnaBridge 174:b96e65c34a4d 90 }
AnnaBridge 174:b96e65c34a4d 91
AnnaBridge 174:b96e65c34a4d 92 #endif