Tomo Yamanaka / mbed-dev

mbed library sources. Supersedes mbed-src. GR-PEACH runs on RAM.

Fork of mbed-dev by mbed official

common/InterruptManager.cpp@103:493a29d2d4d7, 2016-03-30 (annotated)

Committer:
1050186
Date:
Wed Mar 30 11:41:25 2016 +0000
Revision:
103:493a29d2d4d7
Parent:
0:9b334a45a8ff 
GR-PEACH runs on RAM.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 2 #if defined(NVIC_NUM_VECTORS)
bogdanm 0:9b334a45a8ff 3
bogdanm 0:9b334a45a8ff 4 #include "InterruptManager.h"
bogdanm 0:9b334a45a8ff 5 #include <string.h>
bogdanm 0:9b334a45a8ff 6
bogdanm 0:9b334a45a8ff 7 #define CHAIN_INITIAL_SIZE 4
bogdanm 0:9b334a45a8ff 8
bogdanm 0:9b334a45a8ff 9 namespace mbed {
bogdanm 0:9b334a45a8ff 10
bogdanm 0:9b334a45a8ff 11 typedef void (*pvoidf)(void);
bogdanm 0:9b334a45a8ff 12
bogdanm 0:9b334a45a8ff 13 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
bogdanm 0:9b334a45a8ff 14
bogdanm 0:9b334a45a8ff 15 InterruptManager* InterruptManager::get() {
bogdanm 0:9b334a45a8ff 16 if (NULL == _instance)
bogdanm 0:9b334a45a8ff 17 _instance = new InterruptManager();
bogdanm 0:9b334a45a8ff 18 return _instance;
bogdanm 0:9b334a45a8ff 19 }
bogdanm 0:9b334a45a8ff 20
bogdanm 0:9b334a45a8ff 21 InterruptManager::InterruptManager() {
bogdanm 0:9b334a45a8ff 22 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
bogdanm 0:9b334a45a8ff 23 }
bogdanm 0:9b334a45a8ff 24
bogdanm 0:9b334a45a8ff 25 void InterruptManager::destroy() {
bogdanm 0:9b334a45a8ff 26 // Not a good idea to call this unless NO interrupt at all
bogdanm 0:9b334a45a8ff 27 // is under the control of the handler; otherwise, a system crash
bogdanm 0:9b334a45a8ff 28 // is very likely to occur
bogdanm 0:9b334a45a8ff 29 if (NULL != _instance) {
bogdanm 0:9b334a45a8ff 30 delete _instance;
bogdanm 0:9b334a45a8ff 31 _instance = (InterruptManager*)NULL;
bogdanm 0:9b334a45a8ff 32 }
bogdanm 0:9b334a45a8ff 33 }
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 InterruptManager::~InterruptManager() {
bogdanm 0:9b334a45a8ff 36 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
bogdanm 0:9b334a45a8ff 37 if (NULL != _chains[i])
bogdanm 0:9b334a45a8ff 38 delete _chains[i];
bogdanm 0:9b334a45a8ff 39 }
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
bogdanm 0:9b334a45a8ff 42 int irq_pos = get_irq_index(irq);
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 if (NULL == _chains[irq_pos]) {
bogdanm 0:9b334a45a8ff 45 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
bogdanm 0:9b334a45a8ff 46 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
bogdanm 0:9b334a45a8ff 47 return true;
bogdanm 0:9b334a45a8ff 48 }
bogdanm 0:9b334a45a8ff 49 return false;
bogdanm 0:9b334a45a8ff 50 }
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
bogdanm 0:9b334a45a8ff 53 int irq_pos = get_irq_index(irq);
bogdanm 0:9b334a45a8ff 54 bool change = must_replace_vector(irq);
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
bogdanm 0:9b334a45a8ff 57 if (change)
bogdanm 0:9b334a45a8ff 58 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
bogdanm 0:9b334a45a8ff 59 return pf;
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
bogdanm 0:9b334a45a8ff 63 int irq_pos = get_irq_index(irq);
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 if (NULL == _chains[irq_pos])
bogdanm 0:9b334a45a8ff 66 return false;
bogdanm 0:9b334a45a8ff 67 if (!_chains[irq_pos]->remove(handler))
bogdanm 0:9b334a45a8ff 68 return false;
bogdanm 0:9b334a45a8ff 69 // If there's a single function left in the chain, swith the interrupt vector
bogdanm 0:9b334a45a8ff 70 // to call that function directly. This way we save both time and space.
bogdanm 0:9b334a45a8ff 71 if (_chains[irq_pos]->size() == 1 && NULL != _chains[irq_pos]->get(0)->get_function()) {
bogdanm 0:9b334a45a8ff 72 NVIC_SetVector(irq, (uint32_t)_chains[irq_pos]->get(0)->get_function());
bogdanm 0:9b334a45a8ff 73 delete _chains[irq_pos];
bogdanm 0:9b334a45a8ff 74 _chains[irq_pos] = (CallChain*) NULL;
bogdanm 0:9b334a45a8ff 75 }
bogdanm 0:9b334a45a8ff 76 return true;
bogdanm 0:9b334a45a8ff 77 }
bogdanm 0:9b334a45a8ff 78
bogdanm 0:9b334a45a8ff 79 void InterruptManager::irq_helper() {
bogdanm 0:9b334a45a8ff 80 _chains[__get_IPSR()]->call();
bogdanm 0:9b334a45a8ff 81 }
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 int InterruptManager::get_irq_index(IRQn_Type irq) {
bogdanm 0:9b334a45a8ff 84 return (int)irq + NVIC_USER_IRQ_OFFSET;
bogdanm 0:9b334a45a8ff 85 }
bogdanm 0:9b334a45a8ff 86
bogdanm 0:9b334a45a8ff 87 void InterruptManager::static_irq_helper() {
bogdanm 0:9b334a45a8ff 88 InterruptManager::get()->irq_helper();
bogdanm 0:9b334a45a8ff 89 }
bogdanm 0:9b334a45a8ff 90
bogdanm 0:9b334a45a8ff 91 } // namespace mbed
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 #endif