mirror of
git://projects.qi-hardware.com/ben-wpan.git
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143 lines
2.4 KiB
C
143 lines
2.4 KiB
C
/*
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* atrf-rssi/atrf-rssi.c - ben-wpan AT86RF230 spectrum scan
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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 <signal.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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#include "misctxrx.h"
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#ifdef HAVE_GFX
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#include "gui.h"
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#else
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#define gui(dsc) abort()
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#endif
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static struct timeval t0;
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static volatile int run = 1;
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static void sweep(struct atrf_dsc *dsc)
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{
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int chan, rssi;
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struct timeval t;
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for (chan = 11; chan <= 26; chan++) {
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atrf_reg_write(dsc, REG_PHY_CC_CCA, chan);
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/* 150 us, according to AVR2001 section 3.5 */
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wait_for_interrupt(dsc, IRQ_PLL_LOCK, IRQ_PLL_LOCK, 10, 20);
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gettimeofday(&t, NULL);
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rssi = atrf_reg_read(dsc, REG_PHY_RSSI) & RSSI_MASK;
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t.tv_sec -= t0.tv_sec;
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t.tv_usec -= t0.tv_usec;
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printf("%d %f %d\n",
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2405+(chan-11)*5,
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(double) t.tv_sec+t.tv_usec/1000000.0,
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-91+3*(rssi-1));
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}
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printf("\n");
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}
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static void die(int sig)
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{
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run = 0;
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}
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static void usage(const char *name)
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{
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fprintf(stderr,
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"usage: %s [-n] sweeps\n", name);
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#ifdef HAVE_GFX
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fprintf(stderr,
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"%6s %s -g\n", "", name);
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#endif
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exit(1);
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}
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int main(int argc, char **argv)
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{
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struct atrf_dsc *dsc;
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unsigned long arg = 0, i;
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char *end;
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int c;
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int graphical = 0;
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while ((c = getopt(argc, argv, "gn")) != EOF)
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switch (c) {
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#ifdef HAVE_GFX
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case 'g':
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graphical = 1;
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break;
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#endif
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case 'n':
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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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if (!graphical)
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usage(*argv);
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break;
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case 1:
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if (graphical)
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usage(*argv);
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arg = strtoul(argv[optind], &end, 0);
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if (*end)
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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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signal(SIGINT, die);
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dsc = atrf_open();
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if (!dsc)
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return 1;
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atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TRX_OFF);
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atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_RX_ON);
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atrf_reg_write(dsc, REG_IRQ_MASK, IRQ_PLL_LOCK);
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/*
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* We'll wait for the PLL lock after selecting the channel.
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*/
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if (graphical)
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gui(dsc);
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else {
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gettimeofday(&t0, NULL);
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for (i = 0; run && i != arg; i++)
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sweep(dsc);
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}
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atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TRX_OFF);
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atrf_close(dsc);
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return 0;
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}
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