IEEE 802.15.4 subsystem
Sign in or create your account | Project List | Help
IEEE 802.15.4 subsystem Git Source Tree
Root/
Source at commit 49e7c83796bc04941e9dbcec69bc0751563ff4d4 created 7 years 6 days ago. By Werner Almesberger, atusb/: use ""VDD" symbol from kicad-libs | |
---|---|
1 | /* |
2 | * atrf-trim/atrf-trim.c - AT86RF230 oscillator trim utility |
3 | * |
4 | * Written 2010-2011 by Werner Almesberger |
5 | * Copyright 2010-2011 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 <unistd.h> |
17 | #include <sys/time.h> |
18 | |
19 | #include "at86rf230.h" |
20 | #include "atrf.h" |
21 | |
22 | |
23 | static void usage(const char *name) |
24 | { |
25 | fprintf(stderr, "%s [-d driver[:arg]] [trim_value]\n", name); |
26 | exit(1); |
27 | } |
28 | |
29 | |
30 | int main(int argc, char *const *argv) |
31 | { |
32 | const char *driver = NULL; |
33 | struct atrf_dsc *dsc; |
34 | int trim = -1; |
35 | char *end; |
36 | int c; |
37 | |
38 | while ((c = getopt(argc, argv, "d:")) != EOF) |
39 | switch (c) { |
40 | case 'd': |
41 | driver = optarg; |
42 | break; |
43 | default: |
44 | usage(*argv); |
45 | } |
46 | |
47 | switch (argc-optind) { |
48 | case 0: |
49 | break; |
50 | case 1: |
51 | trim = strtoul(argv[optind], &end, 0); |
52 | if (*end || trim > 15) |
53 | usage(*argv); |
54 | break; |
55 | default: |
56 | usage(*argv); |
57 | } |
58 | |
59 | dsc = atrf_open(driver); |
60 | if (!dsc) |
61 | return 1; |
62 | |
63 | if (trim == -1) { |
64 | trim = atrf_reg_read(dsc, REG_XOSC_CTRL) & XTAL_TRIM_MASK; |
65 | printf("%d (%d.%d pF)\n", trim, trim*3/10, trim*3 % 10); |
66 | } else { |
67 | atrf_reg_write(dsc, REG_XOSC_CTRL, |
68 | (XTAL_MODE_INT << XTAL_MODE_SHIFT) | trim); |
69 | } |
70 | |
71 | return 0; |
72 | } |
73 |