RTC auf true
drivers/InterruptManager.cpp@0:38ceb79fef03, 2018-11-28 (annotated)
- Committer:
- kevman
- Date:
- Wed Nov 28 15:10:15 2018 +0000
- Revision:
- 0:38ceb79fef03
RTC modified
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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kevman | 0:38ceb79fef03 | 1 | /* mbed Microcontroller Library |
kevman | 0:38ceb79fef03 | 2 | * Copyright (c) 2006-2013 ARM Limited |
kevman | 0:38ceb79fef03 | 3 | * |
kevman | 0:38ceb79fef03 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
kevman | 0:38ceb79fef03 | 5 | * you may not use this file except in compliance with the License. |
kevman | 0:38ceb79fef03 | 6 | * You may obtain a copy of the License at |
kevman | 0:38ceb79fef03 | 7 | * |
kevman | 0:38ceb79fef03 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
kevman | 0:38ceb79fef03 | 9 | * |
kevman | 0:38ceb79fef03 | 10 | * Unless required by applicable law or agreed to in writing, software |
kevman | 0:38ceb79fef03 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
kevman | 0:38ceb79fef03 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
kevman | 0:38ceb79fef03 | 13 | * See the License for the specific language governing permissions and |
kevman | 0:38ceb79fef03 | 14 | * limitations under the License. |
kevman | 0:38ceb79fef03 | 15 | */ |
kevman | 0:38ceb79fef03 | 16 | #include "cmsis.h" |
kevman | 0:38ceb79fef03 | 17 | #if defined(NVIC_NUM_VECTORS) |
kevman | 0:38ceb79fef03 | 18 | |
kevman | 0:38ceb79fef03 | 19 | // Suppress deprecation warnings since this whole |
kevman | 0:38ceb79fef03 | 20 | // class is deprecated already |
kevman | 0:38ceb79fef03 | 21 | #include "mbed_toolchain.h" |
kevman | 0:38ceb79fef03 | 22 | #undef MBED_DEPRECATED_SINCE |
kevman | 0:38ceb79fef03 | 23 | #define MBED_DEPRECATED_SINCE(...) |
kevman | 0:38ceb79fef03 | 24 | |
kevman | 0:38ceb79fef03 | 25 | #include "drivers/InterruptManager.h" |
kevman | 0:38ceb79fef03 | 26 | #include "platform/mbed_critical.h" |
kevman | 0:38ceb79fef03 | 27 | #include <string.h> |
kevman | 0:38ceb79fef03 | 28 | |
kevman | 0:38ceb79fef03 | 29 | #define CHAIN_INITIAL_SIZE 4 |
kevman | 0:38ceb79fef03 | 30 | |
kevman | 0:38ceb79fef03 | 31 | namespace mbed { |
kevman | 0:38ceb79fef03 | 32 | |
kevman | 0:38ceb79fef03 | 33 | typedef void (*pvoidf)(void); |
kevman | 0:38ceb79fef03 | 34 | |
kevman | 0:38ceb79fef03 | 35 | InterruptManager *InterruptManager::_instance = (InterruptManager *)NULL; |
kevman | 0:38ceb79fef03 | 36 | |
kevman | 0:38ceb79fef03 | 37 | InterruptManager *InterruptManager::get() |
kevman | 0:38ceb79fef03 | 38 | { |
kevman | 0:38ceb79fef03 | 39 | |
kevman | 0:38ceb79fef03 | 40 | if (NULL == _instance) { |
kevman | 0:38ceb79fef03 | 41 | InterruptManager *temp = new InterruptManager(); |
kevman | 0:38ceb79fef03 | 42 | |
kevman | 0:38ceb79fef03 | 43 | // Atomically set _instance |
kevman | 0:38ceb79fef03 | 44 | core_util_critical_section_enter(); |
kevman | 0:38ceb79fef03 | 45 | if (NULL == _instance) { |
kevman | 0:38ceb79fef03 | 46 | _instance = temp; |
kevman | 0:38ceb79fef03 | 47 | } |
kevman | 0:38ceb79fef03 | 48 | core_util_critical_section_exit(); |
kevman | 0:38ceb79fef03 | 49 | |
kevman | 0:38ceb79fef03 | 50 | // Another thread got there first so delete ours |
kevman | 0:38ceb79fef03 | 51 | if (temp != _instance) { |
kevman | 0:38ceb79fef03 | 52 | delete temp; |
kevman | 0:38ceb79fef03 | 53 | } |
kevman | 0:38ceb79fef03 | 54 | |
kevman | 0:38ceb79fef03 | 55 | } |
kevman | 0:38ceb79fef03 | 56 | return _instance; |
kevman | 0:38ceb79fef03 | 57 | } |
kevman | 0:38ceb79fef03 | 58 | |
kevman | 0:38ceb79fef03 | 59 | InterruptManager::InterruptManager() |
kevman | 0:38ceb79fef03 | 60 | { |
kevman | 0:38ceb79fef03 | 61 | // No mutex needed in constructor |
kevman | 0:38ceb79fef03 | 62 | memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain *)); |
kevman | 0:38ceb79fef03 | 63 | } |
kevman | 0:38ceb79fef03 | 64 | |
kevman | 0:38ceb79fef03 | 65 | void InterruptManager::destroy() |
kevman | 0:38ceb79fef03 | 66 | { |
kevman | 0:38ceb79fef03 | 67 | // Not a good idea to call this unless NO interrupt at all |
kevman | 0:38ceb79fef03 | 68 | // is under the control of the handler; otherwise, a system crash |
kevman | 0:38ceb79fef03 | 69 | // is very likely to occur |
kevman | 0:38ceb79fef03 | 70 | if (NULL != _instance) { |
kevman | 0:38ceb79fef03 | 71 | delete _instance; |
kevman | 0:38ceb79fef03 | 72 | _instance = (InterruptManager *)NULL; |
kevman | 0:38ceb79fef03 | 73 | } |
kevman | 0:38ceb79fef03 | 74 | } |
kevman | 0:38ceb79fef03 | 75 | |
kevman | 0:38ceb79fef03 | 76 | InterruptManager::~InterruptManager() |
kevman | 0:38ceb79fef03 | 77 | { |
kevman | 0:38ceb79fef03 | 78 | for (int i = 0; i < NVIC_NUM_VECTORS; i++) |
kevman | 0:38ceb79fef03 | 79 | if (NULL != _chains[i]) { |
kevman | 0:38ceb79fef03 | 80 | delete _chains[i]; |
kevman | 0:38ceb79fef03 | 81 | } |
kevman | 0:38ceb79fef03 | 82 | } |
kevman | 0:38ceb79fef03 | 83 | |
kevman | 0:38ceb79fef03 | 84 | bool InterruptManager::must_replace_vector(IRQn_Type irq) |
kevman | 0:38ceb79fef03 | 85 | { |
kevman | 0:38ceb79fef03 | 86 | lock(); |
kevman | 0:38ceb79fef03 | 87 | |
kevman | 0:38ceb79fef03 | 88 | int ret = false; |
kevman | 0:38ceb79fef03 | 89 | int irq_pos = get_irq_index(irq); |
kevman | 0:38ceb79fef03 | 90 | if (NULL == _chains[irq_pos]) { |
kevman | 0:38ceb79fef03 | 91 | _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE); |
kevman | 0:38ceb79fef03 | 92 | _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq)); |
kevman | 0:38ceb79fef03 | 93 | ret = true; |
kevman | 0:38ceb79fef03 | 94 | } |
kevman | 0:38ceb79fef03 | 95 | unlock(); |
kevman | 0:38ceb79fef03 | 96 | return ret; |
kevman | 0:38ceb79fef03 | 97 | } |
kevman | 0:38ceb79fef03 | 98 | |
kevman | 0:38ceb79fef03 | 99 | pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) |
kevman | 0:38ceb79fef03 | 100 | { |
kevman | 0:38ceb79fef03 | 101 | lock(); |
kevman | 0:38ceb79fef03 | 102 | int irq_pos = get_irq_index(irq); |
kevman | 0:38ceb79fef03 | 103 | bool change = must_replace_vector(irq); |
kevman | 0:38ceb79fef03 | 104 | |
kevman | 0:38ceb79fef03 | 105 | pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function); |
kevman | 0:38ceb79fef03 | 106 | if (change) { |
kevman | 0:38ceb79fef03 | 107 | NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper); |
kevman | 0:38ceb79fef03 | 108 | } |
kevman | 0:38ceb79fef03 | 109 | unlock(); |
kevman | 0:38ceb79fef03 | 110 | return pf; |
kevman | 0:38ceb79fef03 | 111 | } |
kevman | 0:38ceb79fef03 | 112 | |
kevman | 0:38ceb79fef03 | 113 | bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) |
kevman | 0:38ceb79fef03 | 114 | { |
kevman | 0:38ceb79fef03 | 115 | int irq_pos = get_irq_index(irq); |
kevman | 0:38ceb79fef03 | 116 | bool ret = false; |
kevman | 0:38ceb79fef03 | 117 | |
kevman | 0:38ceb79fef03 | 118 | lock(); |
kevman | 0:38ceb79fef03 | 119 | if (_chains[irq_pos] != NULL) { |
kevman | 0:38ceb79fef03 | 120 | if (_chains[irq_pos]->remove(handler)) { |
kevman | 0:38ceb79fef03 | 121 | ret = true; |
kevman | 0:38ceb79fef03 | 122 | } |
kevman | 0:38ceb79fef03 | 123 | } |
kevman | 0:38ceb79fef03 | 124 | unlock(); |
kevman | 0:38ceb79fef03 | 125 | |
kevman | 0:38ceb79fef03 | 126 | return ret; |
kevman | 0:38ceb79fef03 | 127 | } |
kevman | 0:38ceb79fef03 | 128 | |
kevman | 0:38ceb79fef03 | 129 | void InterruptManager::irq_helper() |
kevman | 0:38ceb79fef03 | 130 | { |
kevman | 0:38ceb79fef03 | 131 | _chains[__get_IPSR()]->call(); |
kevman | 0:38ceb79fef03 | 132 | } |
kevman | 0:38ceb79fef03 | 133 | |
kevman | 0:38ceb79fef03 | 134 | int InterruptManager::get_irq_index(IRQn_Type irq) |
kevman | 0:38ceb79fef03 | 135 | { |
kevman | 0:38ceb79fef03 | 136 | // Pure function - no lock needed |
kevman | 0:38ceb79fef03 | 137 | return (int)irq + NVIC_USER_IRQ_OFFSET; |
kevman | 0:38ceb79fef03 | 138 | } |
kevman | 0:38ceb79fef03 | 139 | |
kevman | 0:38ceb79fef03 | 140 | void InterruptManager::static_irq_helper() |
kevman | 0:38ceb79fef03 | 141 | { |
kevman | 0:38ceb79fef03 | 142 | InterruptManager::get()->irq_helper(); |
kevman | 0:38ceb79fef03 | 143 | } |
kevman | 0:38ceb79fef03 | 144 | |
kevman | 0:38ceb79fef03 | 145 | void InterruptManager::lock() |
kevman | 0:38ceb79fef03 | 146 | { |
kevman | 0:38ceb79fef03 | 147 | _mutex.lock(); |
kevman | 0:38ceb79fef03 | 148 | } |
kevman | 0:38ceb79fef03 | 149 | |
kevman | 0:38ceb79fef03 | 150 | void InterruptManager::unlock() |
kevman | 0:38ceb79fef03 | 151 | { |
kevman | 0:38ceb79fef03 | 152 | _mutex.unlock(); |
kevman | 0:38ceb79fef03 | 153 | } |
kevman | 0:38ceb79fef03 | 154 | |
kevman | 0:38ceb79fef03 | 155 | } // namespace mbed |
kevman | 0:38ceb79fef03 | 156 | |
kevman | 0:38ceb79fef03 | 157 | #endif |