|
1
|
/* SAM7DFU blink code support
|
|
2
|
* (C) 2006 by Harald Welte <laforge@gnumonks.org>
|
|
3
|
*
|
|
4
|
*/
|
|
5
|
|
|
6
|
#include <os/pit.h>
|
|
7
|
#include <os/dbgu.h>
|
|
8
|
#include <os/led.h>
|
|
9
|
#include <os/blinkcode.h>
|
|
10
|
|
|
11
|
#define NUM_LEDS 2
|
|
12
|
|
|
13
|
enum blinkcode_state {
|
|
14
|
BLINKCODE_STATE_NONE,
|
|
15
|
BLINKCODE_STATE_SILENT, /* period of silence at start */
|
|
16
|
BLINKCODE_STATE_INIT, /* initial long light */
|
|
17
|
BLINKCODE_STATE_BLINK_OFF, /* blinking out, currently off */
|
|
18
|
BLINKCODE_STATE_BLINK_ON, /* blinking out, currently on */
|
|
19
|
BLINKCODE_STATE_DONE,
|
|
20
|
};
|
|
21
|
|
|
22
|
#define TIME_SILENT (1*HZ)
|
|
23
|
#define TIME_INIT (1*HZ)
|
|
24
|
#define TIME_BLINK (HZ/4)
|
|
25
|
|
|
26
|
struct blinker {
|
|
27
|
struct timer_list timer;
|
|
28
|
enum blinkcode_state state;
|
|
29
|
int num;
|
|
30
|
int cur;
|
|
31
|
uint8_t led;
|
|
32
|
};
|
|
33
|
|
|
34
|
static struct blinker blink_state[NUM_LEDS];
|
|
35
|
|
|
36
|
static void blinkcode_cb(void *data)
|
|
37
|
{
|
|
38
|
/* we got called back by the timer */
|
|
39
|
struct blinker *bl = data;
|
|
40
|
|
|
41
|
DEBUGPCRF("(jiffies=%lu, data=%p, state=%u)",
|
|
42
|
jiffies, data, bl->state);
|
|
43
|
switch (bl->state) {
|
|
44
|
case BLINKCODE_STATE_NONE:
|
|
45
|
led_switch(bl->led, 0);
|
|
46
|
bl->state = BLINKCODE_STATE_SILENT;
|
|
47
|
bl->timer.expires = jiffies + TIME_SILENT;
|
|
48
|
bl->cur = bl->num;
|
|
49
|
break;
|
|
50
|
case BLINKCODE_STATE_SILENT:
|
|
51
|
/* we've finished the period of silence, turn led on */
|
|
52
|
led_switch(bl->led, 1);
|
|
53
|
bl->state = BLINKCODE_STATE_INIT;
|
|
54
|
bl->timer.expires = jiffies + TIME_INIT;
|
|
55
|
break;
|
|
56
|
case BLINKCODE_STATE_INIT:
|
|
57
|
/* we've finished the period of init */
|
|
58
|
led_switch(bl->led, 0);
|
|
59
|
bl->state = BLINKCODE_STATE_BLINK_OFF;
|
|
60
|
bl->timer.expires = jiffies + TIME_INIT;
|
|
61
|
break;
|
|
62
|
case BLINKCODE_STATE_BLINK_OFF:
|
|
63
|
/* we've been off, turn on */
|
|
64
|
led_switch(bl->led, 1);
|
|
65
|
bl->state = BLINKCODE_STATE_BLINK_ON;
|
|
66
|
bl->cur--;
|
|
67
|
bl->timer.expires = jiffies + TIME_BLINK;
|
|
68
|
if (bl->cur <= 0)
|
|
69
|
bl->state = BLINKCODE_STATE_DONE;
|
|
70
|
break;
|
|
71
|
case BLINKCODE_STATE_BLINK_ON:
|
|
72
|
/* we've been on, turn off */
|
|
73
|
led_switch(bl->led, 0);
|
|
74
|
bl->state = BLINKCODE_STATE_BLINK_OFF;
|
|
75
|
bl->timer.expires = jiffies + TIME_BLINK;
|
|
76
|
break;
|
|
77
|
case BLINKCODE_STATE_DONE:
|
|
78
|
/* we've been on, turn off */
|
|
79
|
led_switch(bl->led, 0);
|
|
80
|
return;
|
|
81
|
break;
|
|
82
|
}
|
|
83
|
/* default case: re-add the timer */
|
|
84
|
timer_add(&bl->timer);
|
|
85
|
}
|
|
86
|
|
|
87
|
void blinkcode_set(int led, enum blinkcode_num num)
|
|
88
|
{
|
|
89
|
DEBUGPCRF("(jiffies=%lu, led=%u, num=%u)", jiffies, led, num);
|
|
90
|
|
|
91
|
if (--led > NUM_LEDS)
|
|
92
|
return;
|
|
93
|
|
|
94
|
timer_del(&blink_state[led].timer);
|
|
95
|
|
|
96
|
blink_state[led].num = num;
|
|
97
|
blink_state[led].state = BLINKCODE_STATE_NONE;
|
|
98
|
blink_state[led].timer.expires = jiffies;
|
|
99
|
|
|
100
|
if (num != BLINKCODE_NONE)
|
|
101
|
timer_add(&blink_state[led].timer);
|
|
102
|
}
|
|
103
|
|
|
104
|
void blinkcode_init(void)
|
|
105
|
{
|
|
106
|
int i;
|
|
107
|
|
|
108
|
for (i = 0; i < NUM_LEDS; i++) {
|
|
109
|
blink_state[i].num = 0;
|
|
110
|
blink_state[i].state = BLINKCODE_STATE_NONE;
|
|
111
|
blink_state[i].led = i+1;
|
|
112
|
blink_state[i].timer.data = &blink_state[i];
|
|
113
|
blink_state[i].timer.function = &blinkcode_cb;
|
|
114
|
}
|
|
115
|
}
|
