cc2420_spi.c

00001 /*
00002  * Copyright (c) 2007, Swedish Institute of Computer Science
00003  * All rights reserved. 
00004  *
00005  * Redistribution and use in source and binary forms, with or without 
00006  * modification, are permitted provided that the following conditions 
00007  * are met: 
00008  * 1. Redistributions of source code must retain the above copyright 
00009  *    notice, this list of conditions and the following disclaimer. 
00010  * 2. Redistributions in binary form must reproduce the above copyright 
00011  *    notice, this list of conditions and the following disclaimer in the 
00012  *    documentation and/or other materials provided with the distribution. 
00013  * 3. Neither the name of the Institute nor the names of its contributors 
00014  *    may be used to endorse or promote products derived from this software 
00015  *    without specific prior written permission. 
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
00027  * SUCH DAMAGE. 
00028  *
00029  * @(#)$Id: cc2420_spi.c,v 1.2 2010/06/23 10:44:41 joxe Exp $
00030  */
00031 
00032 #include <avr/io.h>
00033 
00034 #include "contiki.h"
00035 #include "contiki-net.h"
00036 
00037 #include "dev/spi.h"
00038 #include "dev/cc2420.h"
00039 
00040 void
00041 __cc2420_arch_init(void)
00042 {
00043   SFIOR |= BV(PUD);             /* Beware, disable all pull-ups. */
00044 
00045   spi_init();
00046 
00047   DDRB  |= BV(CC2420_RESET_PIN) | BV(CC2420_VREG_PIN) | BV(CC2420_CSN_PIN);
00048   PORTB |= BV(CC2420_RESET_PIN) | BV(CC2420_CSN_PIN);
00049 
00050   SPI_DISABLE();                /* Unselect radio. */
00051 }
00052 
00053 ISR(SIG_INTERRUPT0)
00054 {
00055   __cc2420_intr();
00056 }

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