Yihui Xiong / nrf51822_fix_i2c_spi_conflict

fix nrf51822 i2c & spi conflict

Dependencies:   BLE_API eMPL_MPU6050 nRF51822

Fork of Seeed_Tiny_BLE_Flash by Darren Huang

mbed-src/common/InterruptManager.cpp@5:b8c02645e6af, 2015-11-17 (annotated)

Committer:
yihui
Date:
Tue Nov 17 07:48:56 2015 +0000
Revision:
5:b8c02645e6af
fix i2c & spi conflict

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 5:b8c02645e6af 1 #include "cmsis.h"
yihui 5:b8c02645e6af 2 #if defined(NVIC_NUM_VECTORS)
yihui 5:b8c02645e6af 3
yihui 5:b8c02645e6af 4 #include "InterruptManager.h"
yihui 5:b8c02645e6af 5 #include <string.h>
yihui 5:b8c02645e6af 6
yihui 5:b8c02645e6af 7 #define CHAIN_INITIAL_SIZE 4
yihui 5:b8c02645e6af 8
yihui 5:b8c02645e6af 9 namespace mbed {
yihui 5:b8c02645e6af 10
yihui 5:b8c02645e6af 11 typedef void (*pvoidf)(void);
yihui 5:b8c02645e6af 12
yihui 5:b8c02645e6af 13 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
yihui 5:b8c02645e6af 14
yihui 5:b8c02645e6af 15 InterruptManager* InterruptManager::get() {
yihui 5:b8c02645e6af 16 if (NULL == _instance)
yihui 5:b8c02645e6af 17 _instance = new InterruptManager();
yihui 5:b8c02645e6af 18 return _instance;
yihui 5:b8c02645e6af 19 }
yihui 5:b8c02645e6af 20
yihui 5:b8c02645e6af 21 InterruptManager::InterruptManager() {
yihui 5:b8c02645e6af 22 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
yihui 5:b8c02645e6af 23 }
yihui 5:b8c02645e6af 24
yihui 5:b8c02645e6af 25 void InterruptManager::destroy() {
yihui 5:b8c02645e6af 26 // Not a good idea to call this unless NO interrupt at all
yihui 5:b8c02645e6af 27 // is under the control of the handler; otherwise, a system crash
yihui 5:b8c02645e6af 28 // is very likely to occur
yihui 5:b8c02645e6af 29 if (NULL != _instance) {
yihui 5:b8c02645e6af 30 delete _instance;
yihui 5:b8c02645e6af 31 _instance = (InterruptManager*)NULL;
yihui 5:b8c02645e6af 32 }
yihui 5:b8c02645e6af 33 }
yihui 5:b8c02645e6af 34
yihui 5:b8c02645e6af 35 InterruptManager::~InterruptManager() {
yihui 5:b8c02645e6af 36 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
yihui 5:b8c02645e6af 37 if (NULL != _chains[i])
yihui 5:b8c02645e6af 38 delete _chains[i];
yihui 5:b8c02645e6af 39 }
yihui 5:b8c02645e6af 40
yihui 5:b8c02645e6af 41 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
yihui 5:b8c02645e6af 42 int irq_pos = get_irq_index(irq);
yihui 5:b8c02645e6af 43
yihui 5:b8c02645e6af 44 if (NULL == _chains[irq_pos]) {
yihui 5:b8c02645e6af 45 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
yihui 5:b8c02645e6af 46 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
yihui 5:b8c02645e6af 47 return true;
yihui 5:b8c02645e6af 48 }
yihui 5:b8c02645e6af 49 return false;
yihui 5:b8c02645e6af 50 }
yihui 5:b8c02645e6af 51
yihui 5:b8c02645e6af 52 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
yihui 5:b8c02645e6af 53 int irq_pos = get_irq_index(irq);
yihui 5:b8c02645e6af 54 bool change = must_replace_vector(irq);
yihui 5:b8c02645e6af 55
yihui 5:b8c02645e6af 56 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
yihui 5:b8c02645e6af 57 if (change)
yihui 5:b8c02645e6af 58 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
yihui 5:b8c02645e6af 59 return pf;
yihui 5:b8c02645e6af 60 }
yihui 5:b8c02645e6af 61
yihui 5:b8c02645e6af 62 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
yihui 5:b8c02645e6af 63 int irq_pos = get_irq_index(irq);
yihui 5:b8c02645e6af 64
yihui 5:b8c02645e6af 65 if (NULL == _chains[irq_pos])
yihui 5:b8c02645e6af 66 return false;
yihui 5:b8c02645e6af 67 if (!_chains[irq_pos]->remove(handler))
yihui 5:b8c02645e6af 68 return false;
yihui 5:b8c02645e6af 69 // If there's a single function left in the chain, swith the interrupt vector
yihui 5:b8c02645e6af 70 // to call that function directly. This way we save both time and space.
yihui 5:b8c02645e6af 71 if (_chains[irq_pos]->size() == 1 && NULL != _chains[irq_pos]->get(0)->get_function()) {
yihui 5:b8c02645e6af 72 NVIC_SetVector(irq, (uint32_t)_chains[irq_pos]->get(0)->get_function());
yihui 5:b8c02645e6af 73 delete _chains[irq_pos];
yihui 5:b8c02645e6af 74 _chains[irq_pos] = (CallChain*) NULL;
yihui 5:b8c02645e6af 75 }
yihui 5:b8c02645e6af 76 return true;
yihui 5:b8c02645e6af 77 }
yihui 5:b8c02645e6af 78
yihui 5:b8c02645e6af 79 void InterruptManager::irq_helper() {
yihui 5:b8c02645e6af 80 _chains[__get_IPSR()]->call();
yihui 5:b8c02645e6af 81 }
yihui 5:b8c02645e6af 82
yihui 5:b8c02645e6af 83 int InterruptManager::get_irq_index(IRQn_Type irq) {
yihui 5:b8c02645e6af 84 return (int)irq + NVIC_USER_IRQ_OFFSET;
yihui 5:b8c02645e6af 85 }
yihui 5:b8c02645e6af 86
yihui 5:b8c02645e6af 87 void InterruptManager::static_irq_helper() {
yihui 5:b8c02645e6af 88 InterruptManager::get()->irq_helper();
yihui 5:b8c02645e6af 89 }
yihui 5:b8c02645e6af 90
yihui 5:b8c02645e6af 91 } // namespace mbed
yihui 5:b8c02645e6af 92
yihui 5:b8c02645e6af 93 #endif