mirror of
git://projects.qi-hardware.com/ben-wpan.git
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93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/*
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* atspi-rssi/atspi-rssi.c - ben-wpan AF86RF230 spectrum scan
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*
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* Written 2010 by Werner Almesberger
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* Copyright 2010 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 <usb.h>
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#include <sys/time.h>
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#include "at86rf230.h"
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#include "atspi/ep0.h"
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#include "atspi.h"
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#define FROM_DEV ATSPI_FROM_DEV(0)
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#define TO_DEV ATSPI_TO_DEV(0)
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static struct timeval t0;
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static void sweep(usb_dev_handle *dev)
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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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atspi_reg_write(dev, REG_PHY_CC_CCA, chan);
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/*
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* No need to explicitly wait for the PPL lock - going USB-SPI
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* is pretty slow, leaving the transceiver plenty of time.
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*/
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gettimeofday(&t, NULL);
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rssi = atspi_reg_read(dev, 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 usage(const char *name)
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{
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fprintf(stderr, "%s sweeps \n", name);
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exit(1);
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}
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int main(int argc, const char **argv)
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{
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usb_dev_handle *dev;
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unsigned long sweeps, i;
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char *end;
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if (argc != 2)
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usage(*argv);
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sweeps = strtoul(argv[1], &end, 0);
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if (*end)
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usage(*argv);
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dev = atspi_open();
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if (!dev)
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return 1;
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atspi_reg_write(dev, REG_TRX_STATE, TRX_CMD_TRX_OFF);
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/*
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* No need to explicitly wait for things to stabilize - going USB-SPI
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* is pretty slow, leaving the transceiver more than enough time.
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*/
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atspi_reg_write(dev, REG_TRX_STATE, TRX_CMD_RX_ON);
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gettimeofday(&t0, NULL);
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for (i = 0; i != sweeps; i++)
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sweep(dev);
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atspi_reg_write(dev, REG_TRX_STATE, TRX_CMD_TRX_OFF);
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return 0;
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}
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