modtronix H / mbed_nz32sc151

mbed library for NZ32-SC151

common/InterruptManager.cpp@17:639ed60ce759, 2016-08-19 (annotated)

Committer:
modtronix-com
Date:
Fri Aug 19 15:46:42 2016 +1000
Revision:
17:639ed60ce759
Parent:
1:71204b8406f2 
Added tag v1.1 for changeset 076cbe3e55be

Who changed what in which revision?

UserRevisionLine numberNew contents of line
modtronix 1:71204b8406f2 1 #include "cmsis.h"
modtronix 1:71204b8406f2 2 #if defined(NVIC_NUM_VECTORS)
modtronix 1:71204b8406f2 3
modtronix 1:71204b8406f2 4 #include "InterruptManager.h"
modtronix 1:71204b8406f2 5 #include <string.h>
modtronix 1:71204b8406f2 6
modtronix 1:71204b8406f2 7 #define CHAIN_INITIAL_SIZE 4
modtronix 1:71204b8406f2 8
modtronix 1:71204b8406f2 9 namespace mbed {
modtronix 1:71204b8406f2 10
modtronix 1:71204b8406f2 11 typedef void (*pvoidf)(void);
modtronix 1:71204b8406f2 12
modtronix 1:71204b8406f2 13 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
modtronix 1:71204b8406f2 14
modtronix 1:71204b8406f2 15 InterruptManager* InterruptManager::get() {
modtronix 1:71204b8406f2 16 if (NULL == _instance)
modtronix 1:71204b8406f2 17 _instance = new InterruptManager();
modtronix 1:71204b8406f2 18 return _instance;
modtronix 1:71204b8406f2 19 }
modtronix 1:71204b8406f2 20
modtronix 1:71204b8406f2 21 InterruptManager::InterruptManager() {
modtronix 1:71204b8406f2 22 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
modtronix 1:71204b8406f2 23 }
modtronix 1:71204b8406f2 24
modtronix 1:71204b8406f2 25 void InterruptManager::destroy() {
modtronix 1:71204b8406f2 26 // Not a good idea to call this unless NO interrupt at all
modtronix 1:71204b8406f2 27 // is under the control of the handler; otherwise, a system crash
modtronix 1:71204b8406f2 28 // is very likely to occur
modtronix 1:71204b8406f2 29 if (NULL != _instance) {
modtronix 1:71204b8406f2 30 delete _instance;
modtronix 1:71204b8406f2 31 _instance = (InterruptManager*)NULL;
modtronix 1:71204b8406f2 32 }
modtronix 1:71204b8406f2 33 }
modtronix 1:71204b8406f2 34
modtronix 1:71204b8406f2 35 InterruptManager::~InterruptManager() {
modtronix 1:71204b8406f2 36 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
modtronix 1:71204b8406f2 37 if (NULL != _chains[i])
modtronix 1:71204b8406f2 38 delete _chains[i];
modtronix 1:71204b8406f2 39 }
modtronix 1:71204b8406f2 40
modtronix 1:71204b8406f2 41 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
modtronix 1:71204b8406f2 42 int irq_pos = get_irq_index(irq);
modtronix 1:71204b8406f2 43
modtronix 1:71204b8406f2 44 if (NULL == _chains[irq_pos]) {
modtronix 1:71204b8406f2 45 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
modtronix 1:71204b8406f2 46 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
modtronix 1:71204b8406f2 47 return true;
modtronix 1:71204b8406f2 48 }
modtronix 1:71204b8406f2 49 return false;
modtronix 1:71204b8406f2 50 }
modtronix 1:71204b8406f2 51
modtronix 1:71204b8406f2 52 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
modtronix 1:71204b8406f2 53 int irq_pos = get_irq_index(irq);
modtronix 1:71204b8406f2 54 bool change = must_replace_vector(irq);
modtronix 1:71204b8406f2 55
modtronix 1:71204b8406f2 56 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
modtronix 1:71204b8406f2 57 if (change)
modtronix 1:71204b8406f2 58 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
modtronix 1:71204b8406f2 59 return pf;
modtronix 1:71204b8406f2 60 }
modtronix 1:71204b8406f2 61
modtronix 1:71204b8406f2 62 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
modtronix 1:71204b8406f2 63 int irq_pos = get_irq_index(irq);
modtronix 1:71204b8406f2 64
modtronix 1:71204b8406f2 65 if (NULL == _chains[irq_pos])
modtronix 1:71204b8406f2 66 return false;
modtronix 1:71204b8406f2 67 if (!_chains[irq_pos]->remove(handler))
modtronix 1:71204b8406f2 68 return false;
modtronix 1:71204b8406f2 69 // If there's a single function left in the chain, swith the interrupt vector
modtronix 1:71204b8406f2 70 // to call that function directly. This way we save both time and space.
modtronix 1:71204b8406f2 71 if (_chains[irq_pos]->size() == 1 && NULL != _chains[irq_pos]->get(0)->get_function()) {
modtronix 1:71204b8406f2 72 NVIC_SetVector(irq, (uint32_t)_chains[irq_pos]->get(0)->get_function());
modtronix 1:71204b8406f2 73 delete _chains[irq_pos];
modtronix 1:71204b8406f2 74 _chains[irq_pos] = (CallChain*) NULL;
modtronix 1:71204b8406f2 75 }
modtronix 1:71204b8406f2 76 return true;
modtronix 1:71204b8406f2 77 }
modtronix 1:71204b8406f2 78
modtronix 1:71204b8406f2 79 void InterruptManager::irq_helper() {
modtronix 1:71204b8406f2 80 _chains[__get_IPSR()]->call();
modtronix 1:71204b8406f2 81 }
modtronix 1:71204b8406f2 82
modtronix 1:71204b8406f2 83 int InterruptManager::get_irq_index(IRQn_Type irq) {
modtronix 1:71204b8406f2 84 return (int)irq + NVIC_USER_IRQ_OFFSET;
modtronix 1:71204b8406f2 85 }
modtronix 1:71204b8406f2 86
modtronix 1:71204b8406f2 87 void InterruptManager::static_irq_helper() {
modtronix 1:71204b8406f2 88 InterruptManager::get()->irq_helper();
modtronix 1:71204b8406f2 89 }
modtronix 1:71204b8406f2 90
modtronix 1:71204b8406f2 91 } // namespace mbed
modtronix 1:71204b8406f2 92
modtronix 1:71204b8406f2 93 #endif