Vipin Ranka / MGAS_GR_Peach

This is the final version of Mini Gateway for Automation and Security desgined for Renesas GR Peach Design Contest

Dependencies:   GR-PEACH_video GraphicsFramework HTTPServer R_BSP mbed-rpc mbed-rtos Socket lwip-eth lwip-sys lwip FATFileSystem

Fork of mbed-os-example-mbed5-blinky by mbed-os-examples

mbed-dev/drivers/InterruptManager.cpp@12:9a20164dcc47, 2017-01-11 (annotated)

Committer:
vipinranka
Date:
Wed Jan 11 11:41:30 2017 +0000
Revision:
12:9a20164dcc47
This is the final version MGAS Project for Renesas GR Peach Design Contest

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vipinranka 12:9a20164dcc47 1 /* mbed Microcontroller Library
vipinranka 12:9a20164dcc47 2 * Copyright (c) 2006-2013 ARM Limited
vipinranka 12:9a20164dcc47 3 *
vipinranka 12:9a20164dcc47 4 * Licensed under the Apache License, Version 2.0 (the "License");
vipinranka 12:9a20164dcc47 5 * you may not use this file except in compliance with the License.
vipinranka 12:9a20164dcc47 6 * You may obtain a copy of the License at
vipinranka 12:9a20164dcc47 7 *
vipinranka 12:9a20164dcc47 8 * http://www.apache.org/licenses/LICENSE-2.0
vipinranka 12:9a20164dcc47 9 *
vipinranka 12:9a20164dcc47 10 * Unless required by applicable law or agreed to in writing, software
vipinranka 12:9a20164dcc47 11 * distributed under the License is distributed on an "AS IS" BASIS,
vipinranka 12:9a20164dcc47 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
vipinranka 12:9a20164dcc47 13 * See the License for the specific language governing permissions and
vipinranka 12:9a20164dcc47 14 * limitations under the License.
vipinranka 12:9a20164dcc47 15 */
vipinranka 12:9a20164dcc47 16 #include "cmsis.h"
vipinranka 12:9a20164dcc47 17 #if defined(NVIC_NUM_VECTORS)
vipinranka 12:9a20164dcc47 18
vipinranka 12:9a20164dcc47 19 #include "drivers/InterruptManager.h"
vipinranka 12:9a20164dcc47 20 #include "platform/critical.h"
vipinranka 12:9a20164dcc47 21 #include <string.h>
vipinranka 12:9a20164dcc47 22
vipinranka 12:9a20164dcc47 23 #define CHAIN_INITIAL_SIZE 4
vipinranka 12:9a20164dcc47 24
vipinranka 12:9a20164dcc47 25 namespace mbed {
vipinranka 12:9a20164dcc47 26
vipinranka 12:9a20164dcc47 27 typedef void (*pvoidf)(void);
vipinranka 12:9a20164dcc47 28
vipinranka 12:9a20164dcc47 29 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
vipinranka 12:9a20164dcc47 30
vipinranka 12:9a20164dcc47 31 InterruptManager* InterruptManager::get() {
vipinranka 12:9a20164dcc47 32
vipinranka 12:9a20164dcc47 33 if (NULL == _instance) {
vipinranka 12:9a20164dcc47 34 InterruptManager* temp = new InterruptManager();
vipinranka 12:9a20164dcc47 35
vipinranka 12:9a20164dcc47 36 // Atomically set _instance
vipinranka 12:9a20164dcc47 37 core_util_critical_section_enter();
vipinranka 12:9a20164dcc47 38 if (NULL == _instance) {
vipinranka 12:9a20164dcc47 39 _instance = temp;
vipinranka 12:9a20164dcc47 40 }
vipinranka 12:9a20164dcc47 41 core_util_critical_section_exit();
vipinranka 12:9a20164dcc47 42
vipinranka 12:9a20164dcc47 43 // Another thread got there first so delete ours
vipinranka 12:9a20164dcc47 44 if (temp != _instance) {
vipinranka 12:9a20164dcc47 45 delete temp;
vipinranka 12:9a20164dcc47 46 }
vipinranka 12:9a20164dcc47 47
vipinranka 12:9a20164dcc47 48 }
vipinranka 12:9a20164dcc47 49 return _instance;
vipinranka 12:9a20164dcc47 50 }
vipinranka 12:9a20164dcc47 51
vipinranka 12:9a20164dcc47 52 InterruptManager::InterruptManager() {
vipinranka 12:9a20164dcc47 53 // No mutex needed in constructor
vipinranka 12:9a20164dcc47 54 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
vipinranka 12:9a20164dcc47 55 }
vipinranka 12:9a20164dcc47 56
vipinranka 12:9a20164dcc47 57 void InterruptManager::destroy() {
vipinranka 12:9a20164dcc47 58 // Not a good idea to call this unless NO interrupt at all
vipinranka 12:9a20164dcc47 59 // is under the control of the handler; otherwise, a system crash
vipinranka 12:9a20164dcc47 60 // is very likely to occur
vipinranka 12:9a20164dcc47 61 if (NULL != _instance) {
vipinranka 12:9a20164dcc47 62 delete _instance;
vipinranka 12:9a20164dcc47 63 _instance = (InterruptManager*)NULL;
vipinranka 12:9a20164dcc47 64 }
vipinranka 12:9a20164dcc47 65 }
vipinranka 12:9a20164dcc47 66
vipinranka 12:9a20164dcc47 67 InterruptManager::~InterruptManager() {
vipinranka 12:9a20164dcc47 68 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
vipinranka 12:9a20164dcc47 69 if (NULL != _chains[i])
vipinranka 12:9a20164dcc47 70 delete _chains[i];
vipinranka 12:9a20164dcc47 71 }
vipinranka 12:9a20164dcc47 72
vipinranka 12:9a20164dcc47 73 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
vipinranka 12:9a20164dcc47 74 lock();
vipinranka 12:9a20164dcc47 75
vipinranka 12:9a20164dcc47 76 int ret = false;
vipinranka 12:9a20164dcc47 77 int irq_pos = get_irq_index(irq);
vipinranka 12:9a20164dcc47 78 if (NULL == _chains[irq_pos]) {
vipinranka 12:9a20164dcc47 79 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
vipinranka 12:9a20164dcc47 80 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
vipinranka 12:9a20164dcc47 81 ret = true;
vipinranka 12:9a20164dcc47 82 }
vipinranka 12:9a20164dcc47 83 unlock();
vipinranka 12:9a20164dcc47 84 return ret;
vipinranka 12:9a20164dcc47 85 }
vipinranka 12:9a20164dcc47 86
vipinranka 12:9a20164dcc47 87 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
vipinranka 12:9a20164dcc47 88 lock();
vipinranka 12:9a20164dcc47 89 int irq_pos = get_irq_index(irq);
vipinranka 12:9a20164dcc47 90 bool change = must_replace_vector(irq);
vipinranka 12:9a20164dcc47 91
vipinranka 12:9a20164dcc47 92 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
vipinranka 12:9a20164dcc47 93 if (change)
vipinranka 12:9a20164dcc47 94 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
vipinranka 12:9a20164dcc47 95 unlock();
vipinranka 12:9a20164dcc47 96 return pf;
vipinranka 12:9a20164dcc47 97 }
vipinranka 12:9a20164dcc47 98
vipinranka 12:9a20164dcc47 99 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
vipinranka 12:9a20164dcc47 100 int irq_pos = get_irq_index(irq);
vipinranka 12:9a20164dcc47 101 bool ret = false;
vipinranka 12:9a20164dcc47 102
vipinranka 12:9a20164dcc47 103 lock();
vipinranka 12:9a20164dcc47 104 if (_chains[irq_pos] != NULL) {
vipinranka 12:9a20164dcc47 105 if (_chains[irq_pos]->remove(handler)) {
vipinranka 12:9a20164dcc47 106 ret = true;
vipinranka 12:9a20164dcc47 107 }
vipinranka 12:9a20164dcc47 108 }
vipinranka 12:9a20164dcc47 109 unlock();
vipinranka 12:9a20164dcc47 110
vipinranka 12:9a20164dcc47 111 return ret;
vipinranka 12:9a20164dcc47 112 }
vipinranka 12:9a20164dcc47 113
vipinranka 12:9a20164dcc47 114 void InterruptManager::irq_helper() {
vipinranka 12:9a20164dcc47 115 _chains[__get_IPSR()]->call();
vipinranka 12:9a20164dcc47 116 }
vipinranka 12:9a20164dcc47 117
vipinranka 12:9a20164dcc47 118 int InterruptManager::get_irq_index(IRQn_Type irq) {
vipinranka 12:9a20164dcc47 119 // Pure function - no lock needed
vipinranka 12:9a20164dcc47 120 return (int)irq + NVIC_USER_IRQ_OFFSET;
vipinranka 12:9a20164dcc47 121 }
vipinranka 12:9a20164dcc47 122
vipinranka 12:9a20164dcc47 123 void InterruptManager::static_irq_helper() {
vipinranka 12:9a20164dcc47 124 InterruptManager::get()->irq_helper();
vipinranka 12:9a20164dcc47 125 }
vipinranka 12:9a20164dcc47 126
vipinranka 12:9a20164dcc47 127 void InterruptManager::lock() {
vipinranka 12:9a20164dcc47 128 _mutex.lock();
vipinranka 12:9a20164dcc47 129 }
vipinranka 12:9a20164dcc47 130
vipinranka 12:9a20164dcc47 131 void InterruptManager::unlock() {
vipinranka 12:9a20164dcc47 132 _mutex.unlock();
vipinranka 12:9a20164dcc47 133 }
vipinranka 12:9a20164dcc47 134
vipinranka 12:9a20164dcc47 135 } // namespace mbed
vipinranka 12:9a20164dcc47 136
vipinranka 12:9a20164dcc47 137 #endif