1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
#ifndef MBED_INTERRUPTMANAGER_H
#define MBED_INTERRUPTMANAGER_H
#include "cmsis.h"
#include "CallChain.h"
#include <string.h>
namespace mbed {
/** Use this singleton if you need to chain interrupt handlers.
*
* Example (for LPC1768):
* @code
* #include "InterruptManager.h"
* #include "mbed.h"
*
* Ticker flipper;
* DigitalOut led1(LED1);
* DigitalOut led2(LED2);
*
* void flip(void) {
* led1 = !led1;
* }
*
* void handler(void) {
* led2 = !led1;
* }
*
* int main() {
* led1 = led2 = 0;
* flipper.attach(&flip, 1.0);
* InterruptManager::get()->add_handler(handler, TIMER3_IRQn);
* }
* @endcode
*/
class InterruptManager {
public:
/** Return the only instance of this class
*/
static InterruptManager* get();
/** Destroy the current instance of the interrupt manager
*/
static void destroy();
/** Add a handler for an interrupt at the end of the handler list
*
* @param function the handler to add
* @param irq interrupt number
*
* @returns
* The function object created for 'function'
*/
pFunctionPointer_t add_handler(void (*function)(void), IRQn_Type irq) {
return add_common(function, irq);
}
/** Add a handler for an interrupt at the beginning of the handler list
*
* @param function the handler to add
* @param irq interrupt number
*
* @returns
* The function object created for 'function'
*/
pFunctionPointer_t add_handler_front(void (*function)(void), IRQn_Type irq) {
return add_common(function, irq, true);
}
/** Add a handler for an interrupt at the end of the handler list
*
* @param tptr pointer to the object that has the handler function
* @param mptr pointer to the actual handler function
* @param irq interrupt number
*
* @returns
* The function object created for 'tptr' and 'mptr'
*/
template<typename T>
pFunctionPointer_t add_handler(T* tptr, void (T::*mptr)(void), IRQn_Type irq) {
return add_common(tptr, mptr, irq);
}
/** Add a handler for an interrupt at the beginning of the handler list
*
* @param tptr pointer to the object that has the handler function
* @param mptr pointer to the actual handler function
* @param irq interrupt number
*
* @returns
* The function object created for 'tptr' and 'mptr'
*/
template<typename T>
pFunctionPointer_t add_handler_front(T* tptr, void (T::*mptr)(void), IRQn_Type irq) {
return add_common(tptr, mptr, irq, true);
}
/** Remove a handler from an interrupt
*
* @param handler the function object for the handler to remove
* @param irq the interrupt number
*
* @returns
* true if the handler was found and removed, false otherwise
*/
bool remove_handler(pFunctionPointer_t handler, IRQn_Type irq);
private:
InterruptManager();
~InterruptManager();
// We declare the copy contructor and the assignment operator, but we don't
// implement them. This way, if someone tries to copy/assign our instance,
// he will get an error at compile time.
InterruptManager(const InterruptManager&);
InterruptManager& operator =(const InterruptManager&);
template<typename T>
pFunctionPointer_t add_common(T *tptr, void (T::*mptr)(void), IRQn_Type irq, bool front=false) {
int irq_pos = get_irq_index(irq);
bool change = must_replace_vector(irq);
pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(tptr, mptr) : _chains[irq_pos]->add(tptr, mptr);
if (change)
NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
return pf;
}
pFunctionPointer_t add_common(void (*function)(void), IRQn_Type irq, bool front=false);
bool must_replace_vector(IRQn_Type irq);
int get_irq_index(IRQn_Type irq);
void irq_helper();
void add_helper(void (*function)(void), IRQn_Type irq, bool front=false);
static void static_irq_helper();
CallChain* _chains[NVIC_NUM_VECTORS];
static InterruptManager* _instance;
};
} // namespace mbed
#endif
|
