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
|
#include "project.h"
static int hs_poll=50,hook=-1;
static int fake_hook;
void exti15_10_isr(void)
{
exti_reset_request(EXTI14);
hs_poll=50;
}
static void hs_tick(void)
{
int h;
if (!hs_poll) return;
hs_poll--;
if (hs_poll) return;
h=!!gpio_get(GPIOC,GPIO14);
h^=fake_hook;
if (hook==h) return;
hook=h;
printf("Hook is now %d\r\n",hook);
if ((!hook) && (ringing)) {
ring_off();
answer_call();
}
if (hook) {
ring_off();
terminate_call();
}
}
void toggle_fake_hook(void)
{
fake_hook^=1;
hs_poll=50;
}
void gpio_tick(void)
{
hs_tick();
}
void gpio_init(void)
{
/*GSM module reset pin*/
gpio_set_mode (GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO1);
gpio_set(GPIOA,GPIO1);
/*hookswitch*/
gpio_set_mode (GPIOC, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
gpio_set(GPIOC,GPIO15);
gpio_set_mode (GPIOC, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO14);
gpio_clear(GPIOC,GPIO14);
exti_select_source(EXTI14, GPIOC);
exti_set_trigger(EXTI14, EXTI_TRIGGER_BOTH);
exti_enable_request(EXTI14);
nvic_enable_irq(NVIC_EXTI15_10_IRQ);
}
|
