cc2420-arch.c

/*
 * Copyright (c) 2006, 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.
 *
 * @(#)$Id: cc2420-arch.c,v 1.9 2010/06/23 10:19:15 joxe Exp $
 */


#include "contiki.h"
#include "contiki-net.h"

#include "dev/spi.h"
#include "dev/cc2420.h"
#include "dev/leds.h"
#include "isr_compat.h"

#ifndef CONF_SFD_TIMESTAMPS
#define CONF_SFD_TIMESTAMPS 0
#endif /* CONF_SFD_TIMESTAMPS */

#ifdef CONF_SFD_TIMESTAMPS
#include "cc2420-arch-sfd.h"
#endif

/*---------------------------------------------------------------------------*/
ISR(CC2420_IRQ, cc24240_fifop_interrupt)
{
  ENERGEST_ON(ENERGEST_TYPE_IRQ);

  /* check TA0IV - if 4 (CCR2 => FIFOP interrupt ) */
  if(P1IV == (2 * (1 + CC2420_FIFOP_PIN))) {
    if(cc2420_interrupt()) {
      LPM4_EXIT;
    }
  }
  ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}

/*---------------------------------------------------------------------------*/
void
cc2420_arch_init(void)
{
  spi_init();

  /* all input by default, set these as output */
  CC2420_CSN_PORT(DIR) |= BV(CC2420_CSN_PIN);
  CC2420_VREG_PORT(DIR) |= BV(CC2420_VREG_PIN);
  CC2420_RESET_PORT(DIR) |= BV(CC2420_RESET_PIN);

#if CONF_SFD_TIMESTAMPS
  cc2420_arch_sfd_init();
#endif

  /* CC2420_SPI_DISABLE();                /\* Unselect radio. *\/ */
}
/*---------------------------------------------------------------------------*/