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73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/*
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* atrf-trim/atrf-trim.c - AT86RF230 oscillator trim utility
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*
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* Written 2010-2011 by Werner Almesberger
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* Copyright 2010-2011 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include "at86rf230.h"
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#include "atrf.h"
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static void usage(const char *name)
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{
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fprintf(stderr, "%s [-d driver[:arg]] [trim_value]\n", name);
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exit(1);
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}
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int main(int argc, char *const *argv)
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{
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const char *driver = NULL;
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struct atrf_dsc *dsc;
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int trim = -1;
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char *end;
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int c;
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while ((c = getopt(argc, argv, "d:")) != EOF)
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switch (c) {
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case 'd':
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driver = optarg;
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break;
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default:
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usage(*argv);
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}
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switch (argc-optind) {
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case 0:
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break;
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case 1:
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trim = strtoul(argv[optind], &end, 0);
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if (*end || trim > 15)
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usage(*argv);
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break;
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default:
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usage(*argv);
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}
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dsc = atrf_open(driver);
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if (!dsc)
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return 1;
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if (trim == -1) {
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trim = atrf_reg_read(dsc, REG_XOSC_CTRL) & XTAL_TRIM_MASK;
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printf("%d (%d.%d pF)\n", trim, trim*3/10, trim*3 % 10);
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} else {
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atrf_reg_write(dsc, REG_XOSC_CTRL,
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(XTAL_MODE_INT << XTAL_MODE_SHIFT) | trim);
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}
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return 0;
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}
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