267 lines
7 KiB
C
267 lines
7 KiB
C
/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: radio-arch.c,v 1.15 2007/04/23 08:46:35 fros4943 Exp $
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*/
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#include "dev/radio-arch.h"
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#include "dev/radio.h"
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#include "lib/simEnvChange.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "net/uip.h"
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#include "net/uip-fw.h"
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#include "net/rime.h"
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#include "sys/etimer.h"
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#include "sys/cooja_mt.h"
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#include "sys/log.h"
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#define MAX_RETRIES 100
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#define SS_INTERFERENCE -70
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const struct simInterface radio_interface;
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// COOJA variables
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char simTransmitting;
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char simReceiving;
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char simInDataBuffer[UIP_BUFSIZE];
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int simInSize;
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char simOutDataBuffer[UIP_BUFSIZE];
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int simOutSize;
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char simRadioHWOn = 1;
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int simSignalStrength = -200;
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char simPower = 100;
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int simRadioChannel = 1;
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int inSendFunction = 0;
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enum {
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UIP,
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RIME,
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};
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/*-----------------------------------------------------------------------------------*/
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void
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radio_set_channel(int channel)
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{
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simRadioChannel = channel;
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}
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/*-----------------------------------------------------------------------------------*/
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int
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radio_sstrength(void)
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{
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return simSignalStrength;
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}
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/*-----------------------------------------------------------------------------------*/
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void
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radio_set_txpower(unsigned char power)
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{
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/* 1 - 100: Number indicating output power */
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simPower = power;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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doInterfaceActionsBeforeTick(void)
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{
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// If radio is turned off, do nothing
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if (!simRadioHWOn) {
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simInSize = 0;
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return;
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}
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// Don't fall asleep while receiving (in main file)
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if (simReceiving) {
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simDontFallAsleep = 1;
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return;
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}
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// If no incoming radio data, do nothing
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if (simInSize == 0) {
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return;
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}
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// Check size of received packet
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if (simInSize > UIP_BUFSIZE) {
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// Drop packet by not delivering
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return;
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}
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// ** Good place to add explicit manchester/gcr-encoding
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if(simInDataBuffer[0] == UIP) {
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// Hand over new packet to uIP
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uip_len = simInSize - 1;
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memcpy(&uip_buf[UIP_LLH_LEN], &simInDataBuffer[1], simInSize - 1);
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if(simNoYield) {
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simDoTcpipInput = 1;
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} else {
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tcpip_input();
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}
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} else if(simInDataBuffer[0] == RIME) {
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/* If we are not configured to use uIP, we use Rime instead. */
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rimebuf_copyfrom(&simInDataBuffer[1], simInSize - 1);
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/* log_message("rime input", "");*/
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rime_input();
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}
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simInSize = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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doInterfaceActionsAfterTick(void)
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{
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// Make sure we are awake during radio activity
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if (simReceiving || simTransmitting) {
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simDontFallAsleep = 1;
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return;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static u8_t
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simDoLLSend(unsigned char *buf, int len, int uip_or_rime)
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{
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/* If radio already actively transmitting, drop packet*/
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if(inSendFunction) {
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return UIP_FW_DROPPED;
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}
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inSendFunction = 1;
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/* If radio is turned off, do nothing */
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if(!simRadioHWOn) {
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inSendFunction = 0;
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return UIP_FW_DROPPED;
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}
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/* Drop packet if data size too large */
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if(len > UIP_BUFSIZE) {
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inSendFunction = 0;
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return UIP_FW_TOOLARGE;
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}
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/* Drop packet if no data length */
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if(len <= 0) {
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inSendFunction = 0;
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return UIP_FW_ZEROLEN;
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}
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/* ** Good place to add explicit manchester/gcr-decoding */
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/* Copy packet data to temporary storage */
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simOutDataBuffer[0] = uip_or_rime;
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memcpy(&simOutDataBuffer[1], buf, len);
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simOutSize = len + 1;
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/* Busy-wait until both radio HW and ether is ready */
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{
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int retries = 0;
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while(retries < MAX_RETRIES && !simNoYield &&
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(simSignalStrength > SS_INTERFERENCE || simReceiving)) {
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retries++;
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cooja_mt_yield();
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if(!(simSignalStrength > SS_INTERFERENCE || simReceiving)) {
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/* Wait one extra tick before transmission starts */
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cooja_mt_yield();
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}
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}
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}
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if(simSignalStrength > SS_INTERFERENCE || simReceiving) {
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inSendFunction = 0;
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return UIP_FW_DROPPED;
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}
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// - Initiate transmission -
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simTransmitting = 1;
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// Busy-wait while transmitting
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while(simTransmitting && !simNoYield) {
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cooja_mt_yield();
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}
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inSendFunction = 0;
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return UIP_FW_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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void
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rime_driver_send(void)
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{
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/* log_message("rime driver send", "");*/
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simDoLLSend(rimebuf_hdrptr(), rimebuf_totlen(), RIME);
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}
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/*-----------------------------------------------------------------------------------*/
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u8_t
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simDoSend()
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{
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/* If radio is turned off, reset uip_len */
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if(!simRadioHWOn) {
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uip_len = 0;
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return UIP_FW_DROPPED;
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}
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if(uip_len > UIP_BUFSIZE) {
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uip_len = 0;
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return UIP_FW_DROPPED;
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}
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if(uip_len <= 0) {
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return UIP_FW_ZEROLEN;
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}
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return simDoLLSend(&uip_buf[UIP_LLH_LEN], uip_len, UIP);
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}
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/*-----------------------------------------------------------------------------------*/
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/**
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* \brief Turn radio on.
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*
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* This function turns the radio hardware on.
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*/
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void
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radio_on(void)
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{
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simRadioHWOn = 1;
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}
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/*-----------------------------------------------------------------------------------*/
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/**
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* \brief Turn radio off.
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*
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* This function turns the radio hardware off.
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*/
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void
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radio_off(void)
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{
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simRadioHWOn = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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SIM_INTERFACE(radio_interface,
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doInterfaceActionsBeforeTick,
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doInterfaceActionsAfterTick);
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