IEEE 802.15.4 subsystem
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Source at commit 624caeb00652f6118dc64698b7dad6fa3e5bdcc2 created 7 years 6 days ago. By Werner Almesberger, atusb/: use VR, POWERED, and LED from kicad-libs | |
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1 | /* |
2 | * lib/timeout.c - Set up AT86RF230/231 constant wave test mode |
3 | * |
4 | * Written 2011 by Werner Almesberger |
5 | * Copyright 2011 Werner Almesberger |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation; either version 2 of the License, or |
10 | * (at your option) any later version. |
11 | */ |
12 | |
13 | |
14 | #include <stdlib.h> |
15 | #include <stdio.h> |
16 | #include <sys/time.h> |
17 | |
18 | #include "timeout.h" |
19 | |
20 | |
21 | void timeout_start(struct timeout *t, int ms) |
22 | { |
23 | if (gettimeofday(&t->end, NULL) < 0) { |
24 | perror("gettimeofday"); |
25 | exit(1); |
26 | } |
27 | t->end.tv_sec += ms/1000; |
28 | t->end.tv_usec += 1000*(ms % 1000); |
29 | if (t->end.tv_usec > 999999) { |
30 | t->end.tv_sec++; |
31 | t->end.tv_usec -= 1000000; |
32 | } |
33 | } |
34 | |
35 | |
36 | int timeout_reached(const struct timeout *t) |
37 | { |
38 | struct timeval now; |
39 | |
40 | if (gettimeofday(&now, NULL) < 0) { |
41 | perror("gettimeofday"); |
42 | exit(1); |
43 | } |
44 | if (now.tv_sec > t->end.tv_sec) |
45 | return 1; |
46 | if (now.tv_sec < t->end.tv_sec) |
47 | return 0; |
48 | return now.tv_usec >= t->end.tv_usec; |
49 | } |
50 | |
51 | |
52 | int timeout_left_ms(const struct timeout *t) |
53 | { |
54 | struct timeval now; |
55 | int ms; |
56 | |
57 | if (gettimeofday(&now, NULL) < 0) { |
58 | perror("gettimeofday"); |
59 | exit(1); |
60 | } |
61 | now.tv_sec = t->end.tv_sec-now.tv_sec; |
62 | now.tv_usec = t->end.tv_usec-now.tv_usec; |
63 | if (now.tv_usec < 0) { |
64 | now.tv_sec--; |
65 | now.tv_usec += 1000000; |
66 | } |
67 | return now.tv_sec*1000+now.tv_usec/1000; |
68 | } |
69 |