cc2520-arch.c

/*
 * Copyright (c) 2011, 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.
 */
 
#include "contiki.h"
#include "contiki-net.h"
 
#include "dev/spi-legacy.h"
#include "dev/cc2520/cc2520.h"
#include "isr_compat.h"
 
#ifdef CC2520_CONF_SFD_TIMESTAMPS
#define CONF_SFD_TIMESTAMPS CC2520_CONF_SFD_TIMESTAMPS
#endif /* CC2520_CONF_SFD_TIMESTAMPS */
 
#ifndef CONF_SFD_TIMESTAMPS
#define CONF_SFD_TIMESTAMPS 0
#endif /* CONF_SFD_TIMESTAMPS */
 
#ifdef CONF_SFD_TIMESTAMPS
#include "cc2520-arch-sfd.h"
#endif
 
/*---------------------------------------------------------------------------*/
ISR(CC2520_IRQ, cc2520_port1_interrupt)
{
  if(cc2520_interrupt()) {
    LPM4_EXIT;
  }
}
/*---------------------------------------------------------------------------*/
void
cc2520_arch_init(void)
{
  spi_init();
 
  /* all input by default, set these as output */
  CC2520_CSN_PORT(DIR) |= BV(CC2520_CSN_PIN);
  CC2520_VREG_PORT(DIR) |= BV(CC2520_VREG_PIN);
  CC2520_RESET_PORT(DIR) |= BV(CC2520_RESET_PIN);
 
  CC2520_FIFOP_PORT(DIR) &= ~(BV(CC2520_FIFOP_PIN));
  CC2520_FIFO_PORT(DIR) &= ~(BV(CC2520_FIFO_PIN));
  CC2520_CCA_PORT(DIR) &= ~(BV(CC2520_CCA_PIN));
  CC2520_SFD_PORT(DIR) &= ~(BV(CC2520_SFD_PIN));
 
#if CONF_SFD_TIMESTAMPS
  cc2520_arch_sfd_init();
#endif
 
  CC2520_SPI_DISABLE();                /* Unselect radio. */
}
/*---------------------------------------------------------------------------*/