Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

drivers/InterruptManager.cpp@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 * Copyright (c) 2006-2013 ARM Limited
saloutos 0:083111ae2a11 3 *
saloutos 0:083111ae2a11 4 * Licensed under the Apache License, Version 2.0 (the "License");
saloutos 0:083111ae2a11 5 * you may not use this file except in compliance with the License.
saloutos 0:083111ae2a11 6 * You may obtain a copy of the License at
saloutos 0:083111ae2a11 7 *
saloutos 0:083111ae2a11 8 * http://www.apache.org/licenses/LICENSE-2.0
saloutos 0:083111ae2a11 9 *
saloutos 0:083111ae2a11 10 * Unless required by applicable law or agreed to in writing, software
saloutos 0:083111ae2a11 11 * distributed under the License is distributed on an "AS IS" BASIS,
saloutos 0:083111ae2a11 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
saloutos 0:083111ae2a11 13 * See the License for the specific language governing permissions and
saloutos 0:083111ae2a11 14 * limitations under the License.
saloutos 0:083111ae2a11 15 */
saloutos 0:083111ae2a11 16 #include "cmsis.h"
saloutos 0:083111ae2a11 17 #if defined(NVIC_NUM_VECTORS)
saloutos 0:083111ae2a11 18
saloutos 0:083111ae2a11 19 #include "drivers/InterruptManager.h"
saloutos 0:083111ae2a11 20 #include "platform/mbed_critical.h"
saloutos 0:083111ae2a11 21 #include <string.h>
saloutos 0:083111ae2a11 22
saloutos 0:083111ae2a11 23 #define CHAIN_INITIAL_SIZE 4
saloutos 0:083111ae2a11 24
saloutos 0:083111ae2a11 25 namespace mbed {
saloutos 0:083111ae2a11 26
saloutos 0:083111ae2a11 27 typedef void (*pvoidf)(void);
saloutos 0:083111ae2a11 28
saloutos 0:083111ae2a11 29 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
saloutos 0:083111ae2a11 30
saloutos 0:083111ae2a11 31 InterruptManager* InterruptManager::get() {
saloutos 0:083111ae2a11 32
saloutos 0:083111ae2a11 33 if (NULL == _instance) {
saloutos 0:083111ae2a11 34 InterruptManager* temp = new InterruptManager();
saloutos 0:083111ae2a11 35
saloutos 0:083111ae2a11 36 // Atomically set _instance
saloutos 0:083111ae2a11 37 core_util_critical_section_enter();
saloutos 0:083111ae2a11 38 if (NULL == _instance) {
saloutos 0:083111ae2a11 39 _instance = temp;
saloutos 0:083111ae2a11 40 }
saloutos 0:083111ae2a11 41 core_util_critical_section_exit();
saloutos 0:083111ae2a11 42
saloutos 0:083111ae2a11 43 // Another thread got there first so delete ours
saloutos 0:083111ae2a11 44 if (temp != _instance) {
saloutos 0:083111ae2a11 45 delete temp;
saloutos 0:083111ae2a11 46 }
saloutos 0:083111ae2a11 47
saloutos 0:083111ae2a11 48 }
saloutos 0:083111ae2a11 49 return _instance;
saloutos 0:083111ae2a11 50 }
saloutos 0:083111ae2a11 51
saloutos 0:083111ae2a11 52 InterruptManager::InterruptManager() {
saloutos 0:083111ae2a11 53 // No mutex needed in constructor
saloutos 0:083111ae2a11 54 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
saloutos 0:083111ae2a11 55 }
saloutos 0:083111ae2a11 56
saloutos 0:083111ae2a11 57 void InterruptManager::destroy() {
saloutos 0:083111ae2a11 58 // Not a good idea to call this unless NO interrupt at all
saloutos 0:083111ae2a11 59 // is under the control of the handler; otherwise, a system crash
saloutos 0:083111ae2a11 60 // is very likely to occur
saloutos 0:083111ae2a11 61 if (NULL != _instance) {
saloutos 0:083111ae2a11 62 delete _instance;
saloutos 0:083111ae2a11 63 _instance = (InterruptManager*)NULL;
saloutos 0:083111ae2a11 64 }
saloutos 0:083111ae2a11 65 }
saloutos 0:083111ae2a11 66
saloutos 0:083111ae2a11 67 InterruptManager::~InterruptManager() {
saloutos 0:083111ae2a11 68 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
saloutos 0:083111ae2a11 69 if (NULL != _chains[i])
saloutos 0:083111ae2a11 70 delete _chains[i];
saloutos 0:083111ae2a11 71 }
saloutos 0:083111ae2a11 72
saloutos 0:083111ae2a11 73 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
saloutos 0:083111ae2a11 74 lock();
saloutos 0:083111ae2a11 75
saloutos 0:083111ae2a11 76 int ret = false;
saloutos 0:083111ae2a11 77 int irq_pos = get_irq_index(irq);
saloutos 0:083111ae2a11 78 if (NULL == _chains[irq_pos]) {
saloutos 0:083111ae2a11 79 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
saloutos 0:083111ae2a11 80 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
saloutos 0:083111ae2a11 81 ret = true;
saloutos 0:083111ae2a11 82 }
saloutos 0:083111ae2a11 83 unlock();
saloutos 0:083111ae2a11 84 return ret;
saloutos 0:083111ae2a11 85 }
saloutos 0:083111ae2a11 86
saloutos 0:083111ae2a11 87 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
saloutos 0:083111ae2a11 88 lock();
saloutos 0:083111ae2a11 89 int irq_pos = get_irq_index(irq);
saloutos 0:083111ae2a11 90 bool change = must_replace_vector(irq);
saloutos 0:083111ae2a11 91
saloutos 0:083111ae2a11 92 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
saloutos 0:083111ae2a11 93 if (change)
saloutos 0:083111ae2a11 94 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
saloutos 0:083111ae2a11 95 unlock();
saloutos 0:083111ae2a11 96 return pf;
saloutos 0:083111ae2a11 97 }
saloutos 0:083111ae2a11 98
saloutos 0:083111ae2a11 99 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
saloutos 0:083111ae2a11 100 int irq_pos = get_irq_index(irq);
saloutos 0:083111ae2a11 101 bool ret = false;
saloutos 0:083111ae2a11 102
saloutos 0:083111ae2a11 103 lock();
saloutos 0:083111ae2a11 104 if (_chains[irq_pos] != NULL) {
saloutos 0:083111ae2a11 105 if (_chains[irq_pos]->remove(handler)) {
saloutos 0:083111ae2a11 106 ret = true;
saloutos 0:083111ae2a11 107 }
saloutos 0:083111ae2a11 108 }
saloutos 0:083111ae2a11 109 unlock();
saloutos 0:083111ae2a11 110
saloutos 0:083111ae2a11 111 return ret;
saloutos 0:083111ae2a11 112 }
saloutos 0:083111ae2a11 113
saloutos 0:083111ae2a11 114 void InterruptManager::irq_helper() {
saloutos 0:083111ae2a11 115 _chains[__get_IPSR()]->call();
saloutos 0:083111ae2a11 116 }
saloutos 0:083111ae2a11 117
saloutos 0:083111ae2a11 118 int InterruptManager::get_irq_index(IRQn_Type irq) {
saloutos 0:083111ae2a11 119 // Pure function - no lock needed
saloutos 0:083111ae2a11 120 return (int)irq + NVIC_USER_IRQ_OFFSET;
saloutos 0:083111ae2a11 121 }
saloutos 0:083111ae2a11 122
saloutos 0:083111ae2a11 123 void InterruptManager::static_irq_helper() {
saloutos 0:083111ae2a11 124 InterruptManager::get()->irq_helper();
saloutos 0:083111ae2a11 125 }
saloutos 0:083111ae2a11 126
saloutos 0:083111ae2a11 127 void InterruptManager::lock() {
saloutos 0:083111ae2a11 128 _mutex.lock();
saloutos 0:083111ae2a11 129 }
saloutos 0:083111ae2a11 130
saloutos 0:083111ae2a11 131 void InterruptManager::unlock() {
saloutos 0:083111ae2a11 132 _mutex.unlock();
saloutos 0:083111ae2a11 133 }
saloutos 0:083111ae2a11 134
saloutos 0:083111ae2a11 135 } // namespace mbed
saloutos 0:083111ae2a11 136
saloutos 0:083111ae2a11 137 #endif