-
Notifications
You must be signed in to change notification settings - Fork 491
/
esp_interrupts.c
54 lines (44 loc) · 1.11 KB
/
esp_interrupts.c
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
/* ESP8266 Xtensa interrupt management functions
*
*
* Part of esp-open-rtos
* Copyright (C) 2015 Angus Gratton
* BSD Licensed as described in the file LICENSE
*/
#include <esp/interrupts.h>
typedef struct _xt_isr_entry_ {
_xt_isr handler;
void *arg;
} _xt_isr_entry;
_xt_isr_entry isr[16];
bool esp_in_isr;
void IRAM _xt_isr_attach(uint8_t i, _xt_isr func, void *arg)
{
isr[i].handler = func;
isr[i].arg = arg;
}
/* Generic ISR handler.
Handles all flags set for interrupts in 'intset'.
*/
uint16_t IRAM _xt_isr_handler(uint16_t intset)
{
esp_in_isr = true;
/* WDT has highest priority (occasional WDT resets otherwise) */
if (intset & BIT(INUM_WDT)) {
_xt_clear_ints(BIT(INUM_WDT));
isr[INUM_WDT].handler(NULL);
intset -= BIT(INUM_WDT);
}
while (intset) {
uint8_t index = __builtin_ffs(intset) - 1;
uint16_t mask = BIT(index);
_xt_clear_ints(mask);
_xt_isr handler = isr[index].handler;
if (handler) {
handler(isr[index].arg);
}
intset -= mask;
}
esp_in_isr = false;
return 0;
}