EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

hal/mbed_sleep_manager.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2017 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16
be_bryan 0:b74591d5ab33 17 #include "mbed_sleep.h"
be_bryan 0:b74591d5ab33 18 #include "mbed_critical.h"
be_bryan 0:b74591d5ab33 19 #include "sleep_api.h"
be_bryan 0:b74591d5ab33 20 #include "mbed_error.h"
be_bryan 0:b74591d5ab33 21 #include <limits.h>
be_bryan 0:b74591d5ab33 22
be_bryan 0:b74591d5ab33 23 #if DEVICE_SLEEP
be_bryan 0:b74591d5ab33 24
be_bryan 0:b74591d5ab33 25 // deep sleep locking counter. A target is allowed to deep sleep if counter == 0
be_bryan 0:b74591d5ab33 26 static uint16_t deep_sleep_lock = 0U;
be_bryan 0:b74591d5ab33 27
be_bryan 0:b74591d5ab33 28 void sleep_manager_lock_deep_sleep(void)
be_bryan 0:b74591d5ab33 29 {
be_bryan 0:b74591d5ab33 30 core_util_critical_section_enter();
be_bryan 0:b74591d5ab33 31 if (deep_sleep_lock == USHRT_MAX) {
be_bryan 0:b74591d5ab33 32 core_util_critical_section_exit();
be_bryan 0:b74591d5ab33 33 error("Deep sleep lock would overflow (> USHRT_MAX)");
be_bryan 0:b74591d5ab33 34 }
be_bryan 0:b74591d5ab33 35 core_util_atomic_incr_u16(&deep_sleep_lock, 1);
be_bryan 0:b74591d5ab33 36 core_util_critical_section_exit();
be_bryan 0:b74591d5ab33 37 }
be_bryan 0:b74591d5ab33 38
be_bryan 0:b74591d5ab33 39 void sleep_manager_unlock_deep_sleep(void)
be_bryan 0:b74591d5ab33 40 {
be_bryan 0:b74591d5ab33 41 core_util_critical_section_enter();
be_bryan 0:b74591d5ab33 42 if (deep_sleep_lock == 0) {
be_bryan 0:b74591d5ab33 43 core_util_critical_section_exit();
be_bryan 0:b74591d5ab33 44 error("Deep sleep lock would underflow (< 0)");
be_bryan 0:b74591d5ab33 45 }
be_bryan 0:b74591d5ab33 46 core_util_atomic_decr_u16(&deep_sleep_lock, 1);
be_bryan 0:b74591d5ab33 47 core_util_critical_section_exit();
be_bryan 0:b74591d5ab33 48 }
be_bryan 0:b74591d5ab33 49
be_bryan 0:b74591d5ab33 50 bool sleep_manager_can_deep_sleep(void)
be_bryan 0:b74591d5ab33 51 {
be_bryan 0:b74591d5ab33 52 return deep_sleep_lock == 0 ? true : false;
be_bryan 0:b74591d5ab33 53 }
be_bryan 0:b74591d5ab33 54
be_bryan 0:b74591d5ab33 55 void sleep_manager_sleep_auto(void)
be_bryan 0:b74591d5ab33 56 {
be_bryan 0:b74591d5ab33 57 core_util_critical_section_enter();
be_bryan 0:b74591d5ab33 58 // debug profile should keep debuggers attached, no deep sleep allowed
be_bryan 0:b74591d5ab33 59 #ifdef MBED_DEBUG
be_bryan 0:b74591d5ab33 60 hal_sleep();
be_bryan 0:b74591d5ab33 61 #else
be_bryan 0:b74591d5ab33 62 if (sleep_manager_can_deep_sleep()) {
be_bryan 0:b74591d5ab33 63 hal_deepsleep();
be_bryan 0:b74591d5ab33 64 } else {
be_bryan 0:b74591d5ab33 65 hal_sleep();
be_bryan 0:b74591d5ab33 66 }
be_bryan 0:b74591d5ab33 67 #endif
be_bryan 0:b74591d5ab33 68 core_util_critical_section_exit();
be_bryan 0:b74591d5ab33 69 }
be_bryan 0:b74591d5ab33 70
be_bryan 0:b74591d5ab33 71 #else
be_bryan 0:b74591d5ab33 72
be_bryan 0:b74591d5ab33 73 // locking is valid only if DEVICE_SLEEP is defined
be_bryan 0:b74591d5ab33 74 // we provide empty implementation
be_bryan 0:b74591d5ab33 75
be_bryan 0:b74591d5ab33 76 void sleep_manager_lock_deep_sleep(void)
be_bryan 0:b74591d5ab33 77 {
be_bryan 0:b74591d5ab33 78
be_bryan 0:b74591d5ab33 79 }
be_bryan 0:b74591d5ab33 80
be_bryan 0:b74591d5ab33 81 void sleep_manager_unlock_deep_sleep(void)
be_bryan 0:b74591d5ab33 82 {
be_bryan 0:b74591d5ab33 83
be_bryan 0:b74591d5ab33 84 }
be_bryan 0:b74591d5ab33 85
be_bryan 0:b74591d5ab33 86 bool sleep_manager_can_deep_sleep(void)
be_bryan 0:b74591d5ab33 87 {
be_bryan 0:b74591d5ab33 88 // no sleep implemented
be_bryan 0:b74591d5ab33 89 return false;
be_bryan 0:b74591d5ab33 90 }
be_bryan 0:b74591d5ab33 91
be_bryan 0:b74591d5ab33 92 #endif