Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/hal/mbed_sleep_manager.c@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2017 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16
marcozecchini 0:9fca2b23d0ba 17 #include "mbed_sleep.h"
marcozecchini 0:9fca2b23d0ba 18 #include "mbed_critical.h"
marcozecchini 0:9fca2b23d0ba 19 #include "sleep_api.h"
marcozecchini 0:9fca2b23d0ba 20 #include "mbed_error.h"
marcozecchini 0:9fca2b23d0ba 21 #include <limits.h>
marcozecchini 0:9fca2b23d0ba 22
marcozecchini 0:9fca2b23d0ba 23 #if DEVICE_SLEEP
marcozecchini 0:9fca2b23d0ba 24
marcozecchini 0:9fca2b23d0ba 25 // deep sleep locking counter. A target is allowed to deep sleep if counter == 0
marcozecchini 0:9fca2b23d0ba 26 static uint16_t deep_sleep_lock = 0U;
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 void sleep_manager_lock_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 29 {
marcozecchini 0:9fca2b23d0ba 30 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 31 if (deep_sleep_lock == USHRT_MAX) {
marcozecchini 0:9fca2b23d0ba 32 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 33 error("Deep sleep lock would overflow (> USHRT_MAX)");
marcozecchini 0:9fca2b23d0ba 34 }
marcozecchini 0:9fca2b23d0ba 35 core_util_atomic_incr_u16(&deep_sleep_lock, 1);
marcozecchini 0:9fca2b23d0ba 36 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 37 }
marcozecchini 0:9fca2b23d0ba 38
marcozecchini 0:9fca2b23d0ba 39 void sleep_manager_unlock_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 40 {
marcozecchini 0:9fca2b23d0ba 41 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 42 if (deep_sleep_lock == 0) {
marcozecchini 0:9fca2b23d0ba 43 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 44 error("Deep sleep lock would underflow (< 0)");
marcozecchini 0:9fca2b23d0ba 45 }
marcozecchini 0:9fca2b23d0ba 46 core_util_atomic_decr_u16(&deep_sleep_lock, 1);
marcozecchini 0:9fca2b23d0ba 47 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 48 }
marcozecchini 0:9fca2b23d0ba 49
marcozecchini 0:9fca2b23d0ba 50 bool sleep_manager_can_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 51 {
marcozecchini 0:9fca2b23d0ba 52 return deep_sleep_lock == 0 ? true : false;
marcozecchini 0:9fca2b23d0ba 53 }
marcozecchini 0:9fca2b23d0ba 54
marcozecchini 0:9fca2b23d0ba 55 void sleep_manager_sleep_auto(void)
marcozecchini 0:9fca2b23d0ba 56 {
marcozecchini 0:9fca2b23d0ba 57 core_util_critical_section_enter();
marcozecchini 0:9fca2b23d0ba 58 // debug profile should keep debuggers attached, no deep sleep allowed
marcozecchini 0:9fca2b23d0ba 59 #ifdef MBED_DEBUG
marcozecchini 0:9fca2b23d0ba 60 hal_sleep();
marcozecchini 0:9fca2b23d0ba 61 #else
marcozecchini 0:9fca2b23d0ba 62 if (sleep_manager_can_deep_sleep()) {
marcozecchini 0:9fca2b23d0ba 63 hal_deepsleep();
marcozecchini 0:9fca2b23d0ba 64 } else {
marcozecchini 0:9fca2b23d0ba 65 hal_sleep();
marcozecchini 0:9fca2b23d0ba 66 }
marcozecchini 0:9fca2b23d0ba 67 #endif
marcozecchini 0:9fca2b23d0ba 68 core_util_critical_section_exit();
marcozecchini 0:9fca2b23d0ba 69 }
marcozecchini 0:9fca2b23d0ba 70
marcozecchini 0:9fca2b23d0ba 71 #else
marcozecchini 0:9fca2b23d0ba 72
marcozecchini 0:9fca2b23d0ba 73 // locking is valid only if DEVICE_SLEEP is defined
marcozecchini 0:9fca2b23d0ba 74 // we provide empty implementation
marcozecchini 0:9fca2b23d0ba 75
marcozecchini 0:9fca2b23d0ba 76 void sleep_manager_lock_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 77 {
marcozecchini 0:9fca2b23d0ba 78
marcozecchini 0:9fca2b23d0ba 79 }
marcozecchini 0:9fca2b23d0ba 80
marcozecchini 0:9fca2b23d0ba 81 void sleep_manager_unlock_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 82 {
marcozecchini 0:9fca2b23d0ba 83
marcozecchini 0:9fca2b23d0ba 84 }
marcozecchini 0:9fca2b23d0ba 85
marcozecchini 0:9fca2b23d0ba 86 bool sleep_manager_can_deep_sleep(void)
marcozecchini 0:9fca2b23d0ba 87 {
marcozecchini 0:9fca2b23d0ba 88 // no sleep implemented
marcozecchini 0:9fca2b23d0ba 89 return false;
marcozecchini 0:9fca2b23d0ba 90 }
marcozecchini 0:9fca2b23d0ba 91
marcozecchini 0:9fca2b23d0ba 92 #endif