Aravind Vadali / mbed-src-AV

mbed.h library with any bug fixes AV finds.

Dependents:   micromouse4_encoder_testing PID_Test Lab1_Test WorkingPID ... more

common/InterruptManager.cpp@1:ebce2ad32f95, 2015-11-02 (annotated)

Committer:
aravindsv
Date:
Mon Nov 02 03:07:12 2015 +0000
Revision:
1:ebce2ad32f95
Parent:
0:ba7650f404af 
Changed the RCC timeout value to 500 ms, so total code startup time before program starts running is ~1s. Hopefully no side-effects from lower startup timeouts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aravindsv 0:ba7650f404af 1 #include "cmsis.h"
aravindsv 0:ba7650f404af 2 #if defined(NVIC_NUM_VECTORS)
aravindsv 0:ba7650f404af 3
aravindsv 0:ba7650f404af 4 #include "InterruptManager.h"
aravindsv 0:ba7650f404af 5 #include <string.h>
aravindsv 0:ba7650f404af 6
aravindsv 0:ba7650f404af 7 #define CHAIN_INITIAL_SIZE 4
aravindsv 0:ba7650f404af 8
aravindsv 0:ba7650f404af 9 namespace mbed {
aravindsv 0:ba7650f404af 10
aravindsv 0:ba7650f404af 11 typedef void (*pvoidf)(void);
aravindsv 0:ba7650f404af 12
aravindsv 0:ba7650f404af 13 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
aravindsv 0:ba7650f404af 14
aravindsv 0:ba7650f404af 15 InterruptManager* InterruptManager::get() {
aravindsv 0:ba7650f404af 16 if (NULL == _instance)
aravindsv 0:ba7650f404af 17 _instance = new InterruptManager();
aravindsv 0:ba7650f404af 18 return _instance;
aravindsv 0:ba7650f404af 19 }
aravindsv 0:ba7650f404af 20
aravindsv 0:ba7650f404af 21 InterruptManager::InterruptManager() {
aravindsv 0:ba7650f404af 22 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
aravindsv 0:ba7650f404af 23 }
aravindsv 0:ba7650f404af 24
aravindsv 0:ba7650f404af 25 void InterruptManager::destroy() {
aravindsv 0:ba7650f404af 26 // Not a good idea to call this unless NO interrupt at all
aravindsv 0:ba7650f404af 27 // is under the control of the handler; otherwise, a system crash
aravindsv 0:ba7650f404af 28 // is very likely to occur
aravindsv 0:ba7650f404af 29 if (NULL != _instance) {
aravindsv 0:ba7650f404af 30 delete _instance;
aravindsv 0:ba7650f404af 31 _instance = (InterruptManager*)NULL;
aravindsv 0:ba7650f404af 32 }
aravindsv 0:ba7650f404af 33 }
aravindsv 0:ba7650f404af 34
aravindsv 0:ba7650f404af 35 InterruptManager::~InterruptManager() {
aravindsv 0:ba7650f404af 36 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
aravindsv 0:ba7650f404af 37 if (NULL != _chains[i])
aravindsv 0:ba7650f404af 38 delete _chains[i];
aravindsv 0:ba7650f404af 39 }
aravindsv 0:ba7650f404af 40
aravindsv 0:ba7650f404af 41 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
aravindsv 0:ba7650f404af 42 int irq_pos = get_irq_index(irq);
aravindsv 0:ba7650f404af 43
aravindsv 0:ba7650f404af 44 if (NULL == _chains[irq_pos]) {
aravindsv 0:ba7650f404af 45 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
aravindsv 0:ba7650f404af 46 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
aravindsv 0:ba7650f404af 47 return true;
aravindsv 0:ba7650f404af 48 }
aravindsv 0:ba7650f404af 49 return false;
aravindsv 0:ba7650f404af 50 }
aravindsv 0:ba7650f404af 51
aravindsv 0:ba7650f404af 52 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
aravindsv 0:ba7650f404af 53 int irq_pos = get_irq_index(irq);
aravindsv 0:ba7650f404af 54 bool change = must_replace_vector(irq);
aravindsv 0:ba7650f404af 55
aravindsv 0:ba7650f404af 56 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
aravindsv 0:ba7650f404af 57 if (change)
aravindsv 0:ba7650f404af 58 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
aravindsv 0:ba7650f404af 59 return pf;
aravindsv 0:ba7650f404af 60 }
aravindsv 0:ba7650f404af 61
aravindsv 0:ba7650f404af 62 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
aravindsv 0:ba7650f404af 63 int irq_pos = get_irq_index(irq);
aravindsv 0:ba7650f404af 64
aravindsv 0:ba7650f404af 65 if (NULL == _chains[irq_pos])
aravindsv 0:ba7650f404af 66 return false;
aravindsv 0:ba7650f404af 67 if (!_chains[irq_pos]->remove(handler))
aravindsv 0:ba7650f404af 68 return false;
aravindsv 0:ba7650f404af 69 // If there's a single function left in the chain, swith the interrupt vector
aravindsv 0:ba7650f404af 70 // to call that function directly. This way we save both time and space.
aravindsv 0:ba7650f404af 71 if (_chains[irq_pos]->size() == 1 && NULL != _chains[irq_pos]->get(0)->get_function()) {
aravindsv 0:ba7650f404af 72 NVIC_SetVector(irq, (uint32_t)_chains[irq_pos]->get(0)->get_function());
aravindsv 0:ba7650f404af 73 delete _chains[irq_pos];
aravindsv 0:ba7650f404af 74 _chains[irq_pos] = (CallChain*) NULL;
aravindsv 0:ba7650f404af 75 }
aravindsv 0:ba7650f404af 76 return true;
aravindsv 0:ba7650f404af 77 }
aravindsv 0:ba7650f404af 78
aravindsv 0:ba7650f404af 79 void InterruptManager::irq_helper() {
aravindsv 0:ba7650f404af 80 _chains[__get_IPSR()]->call();
aravindsv 0:ba7650f404af 81 }
aravindsv 0:ba7650f404af 82
aravindsv 0:ba7650f404af 83 int InterruptManager::get_irq_index(IRQn_Type irq) {
aravindsv 0:ba7650f404af 84 return (int)irq + NVIC_USER_IRQ_OFFSET;
aravindsv 0:ba7650f404af 85 }
aravindsv 0:ba7650f404af 86
aravindsv 0:ba7650f404af 87 void InterruptManager::static_irq_helper() {
aravindsv 0:ba7650f404af 88 InterruptManager::get()->irq_helper();
aravindsv 0:ba7650f404af 89 }
aravindsv 0:ba7650f404af 90
aravindsv 0:ba7650f404af 91 } // namespace mbed
aravindsv 0:ba7650f404af 92
aravindsv 0:ba7650f404af 93 #endif