blob: 71fe4edef46c6ecb45e03d37d885a8e9a673a62e (
plain)
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
|
#include "ringbuffer.h"
#include "trace.h"
#include "utils.h"
void rbuf_reset(volatile ringbuf * rb)
{
unsigned long state;
local_irq_save(state);
rb->ird = 0;
rb->iwr = 0;
local_irq_restore(state);
}
uint8_t rbuf_read(volatile ringbuf * rb)
{
unsigned long state;
uint8_t val;
local_irq_save(state);
val = rb->buf[rb->ird];
rb->ird = (rb->ird + 1) % RING_BUFLEN;
local_irq_restore(state);
return val;
}
uint8_t rbuf_peek(volatile ringbuf * rb)
{
return rb->buf[rb->ird];
}
bool rbuf_is_empty(volatile ringbuf * rb)
{
return rb->ird == rb->iwr;
}
static bool __rbuf_is_full(volatile ringbuf * rb)
{
return rb->ird == (rb->iwr + 1) % RING_BUFLEN;
}
bool rbuf_is_full(volatile ringbuf * rb)
{
unsigned long state;
bool rc;
local_irq_save(state);
rc = rb->ird == (rb->iwr + 1) % RING_BUFLEN;
local_irq_restore(state);
return rc;
}
void rbuf_write(volatile volatile ringbuf * rb, uint8_t item)
{
unsigned long state;
local_irq_save(state);
if (!__rbuf_is_full(rb)) {
rb->buf[rb->iwr] = item;
rb->iwr = (rb->iwr + 1) % RING_BUFLEN;
local_irq_restore(state);
} else {
local_irq_restore(state);
TRACE_ERROR("Ringbuffer full, losing bytes!");
}
}
|
