Contiki 2.6

cc2420-arch.c

00001 /*
00002  * Copyright (c) 2006, 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-arch.c,v 1.9 2010/06/23 10:19:15 joxe Exp $
00030  */
00031 
00032 
00033 #include "contiki.h"
00034 #include "contiki-net.h"
00035 
00036 #include "dev/spi.h"
00037 #include "dev/cc2420.h"
00038 #include "dev/leds.h"
00039 #include "isr_compat.h"
00040 
00041 #ifndef CONF_SFD_TIMESTAMPS
00042 #define CONF_SFD_TIMESTAMPS 0
00043 #endif /* CONF_SFD_TIMESTAMPS */
00044 
00045 #ifdef CONF_SFD_TIMESTAMPS
00046 #include "cc2420-arch-sfd.h"
00047 #endif
00048 
00049 /*---------------------------------------------------------------------------*/
00050 ISR(CC2420_IRQ, cc24240_fifop_interrupt)
00051 {
00052   ENERGEST_ON(ENERGEST_TYPE_IRQ);
00053 
00054   /* check TA0IV - if 4 (CCR2 => FIFOP interrupt ) */
00055   if(P1IV == (2 * (1 + CC2420_FIFOP_PIN))) {
00056     if(cc2420_interrupt()) {
00057       LPM4_EXIT;
00058     }
00059   }
00060   ENERGEST_OFF(ENERGEST_TYPE_IRQ);
00061 }
00062 
00063 /*---------------------------------------------------------------------------*/
00064 void
00065 cc2420_arch_init(void)
00066 {
00067   spi_init();
00068 
00069   /* all input by default, set these as output */
00070   CC2420_CSN_PORT(DIR) |= BV(CC2420_CSN_PIN);
00071   CC2420_VREG_PORT(DIR) |= BV(CC2420_VREG_PIN);
00072   CC2420_RESET_PORT(DIR) |= BV(CC2420_RESET_PIN);
00073 
00074 #if CONF_SFD_TIMESTAMPS
00075   cc2420_arch_sfd_init();
00076 #endif
00077 
00078   /* CC2420_SPI_DISABLE();                /\* Unselect radio. *\/ */
00079 }
00080 /*---------------------------------------------------------------------------*/