94 lines
3 KiB
C
94 lines
3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2007, Swedish Institute of Computer Science.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* This file is part of the Contiki operating system.
|
||
|
|
*
|
||
|
|
* $Id: rssi-scanner.c,v 1.1 2009/04/25 09:41:37 joxe Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file
|
||
|
|
* Scanning 2.4 GHz radio frequencies using CC2420 and prints
|
||
|
|
* the values
|
||
|
|
* \author
|
||
|
|
* Joakim Eriksson, joakime@sics.se
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "contiki.h"
|
||
|
|
#include "net/rime.h"
|
||
|
|
|
||
|
|
#include "dev/leds.h"
|
||
|
|
#include "dev/cc2420.h"
|
||
|
|
#include "dev/cc2420_const.h"
|
||
|
|
#include "dev/spi.h"
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
/* This assumes that the CC2420 is always on and "stable" */
|
||
|
|
static void
|
||
|
|
set_frq(int c)
|
||
|
|
{
|
||
|
|
int f;
|
||
|
|
/* fine graied channel - can we even read other channels with CC2420 ? */
|
||
|
|
f = c + 302 + 0x4000;
|
||
|
|
|
||
|
|
FASTSPI_SETREG(CC2420_FSCTRL, f);
|
||
|
|
FASTSPI_STROBE(CC2420_SRXON);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
do_rssi(void)
|
||
|
|
{
|
||
|
|
int channel;
|
||
|
|
printf("RSSI:");
|
||
|
|
for(channel = 0; channel <= 79; ++channel) {
|
||
|
|
set_frq(channel + 55);
|
||
|
|
printf("%d ", cc2420_rssi() + 53);
|
||
|
|
}
|
||
|
|
printf("\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
PROCESS(scanner_process, "RSSI Scanner");
|
||
|
|
AUTOSTART_PROCESSES(&scanner_process);
|
||
|
|
/*---------------------------------------------------------------------------*/
|
||
|
|
PROCESS_THREAD(scanner_process, ev, data)
|
||
|
|
{
|
||
|
|
PROCESS_BEGIN();
|
||
|
|
/* switch mac layer off, and turn radio on */
|
||
|
|
rime_mac->off(0);
|
||
|
|
cc2420_on();
|
||
|
|
|
||
|
|
while(1) {
|
||
|
|
do_rssi();
|
||
|
|
}
|
||
|
|
|
||
|
|
PROCESS_END();
|
||
|
|
}
|
||
|
|
/*---------------------------------------------------------------------------*/
|