osd-contiki/platform/cooja/dev/radio-arch.c
2007-04-23 08:46:35 +00:00

268 lines
7 KiB
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: radio-arch.c,v 1.15 2007/04/23 08:46:35 fros4943 Exp $
*/
#include "dev/radio-arch.h"
#include "dev/radio.h"
#include "lib/simEnvChange.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "net/uip.h"
#include "net/uip-fw.h"
#include "net/rime.h"
#include "sys/etimer.h"
#include "sys/cooja_mt.h"
#include "sys/log.h"
#define MAX_RETRIES 100
#define SS_INTERFERENCE -70
const struct simInterface radio_interface;
// COOJA variables
char simTransmitting;
char simReceiving;
char simInDataBuffer[UIP_BUFSIZE];
int simInSize;
char simOutDataBuffer[UIP_BUFSIZE];
int simOutSize;
char simRadioHWOn = 1;
int simSignalStrength = -200;
char simPower = 100;
int simRadioChannel = 1;
int inSendFunction = 0;
enum {
UIP,
RIME,
};
/*-----------------------------------------------------------------------------------*/
void
radio_set_channel(int channel)
{
simRadioChannel = channel;
}
/*-----------------------------------------------------------------------------------*/
int
radio_sstrength(void)
{
return simSignalStrength;
}
/*-----------------------------------------------------------------------------------*/
void
radio_set_txpower(unsigned char power)
{
/* 1 - 100: Number indicating output power */
simPower = power;
}
/*-----------------------------------------------------------------------------------*/
static void
doInterfaceActionsBeforeTick(void)
{
// If radio is turned off, do nothing
if (!simRadioHWOn) {
simInSize = 0;
return;
}
// Don't fall asleep while receiving (in main file)
if (simReceiving) {
simDontFallAsleep = 1;
return;
}
// If no incoming radio data, do nothing
if (simInSize == 0) {
return;
}
// Check size of received packet
if (simInSize > UIP_BUFSIZE) {
// Drop packet by not delivering
return;
}
// ** Good place to add explicit manchester/gcr-encoding
if(simInDataBuffer[0] == UIP) {
// Hand over new packet to uIP
uip_len = simInSize - 1;
memcpy(&uip_buf[UIP_LLH_LEN], &simInDataBuffer[1], simInSize - 1);
if(simNoYield) {
simDoTcpipInput = 1;
} else {
tcpip_input();
}
} else if(simInDataBuffer[0] == RIME) {
/* If we are not configured to use uIP, we use Rime instead. */
rimebuf_copyfrom(&simInDataBuffer[1], simInSize - 1);
/* log_message("rime input", "");*/
rime_input();
}
simInSize = 0;
}
/*-----------------------------------------------------------------------------------*/
static void
doInterfaceActionsAfterTick(void)
{
// Make sure we are awake during radio activity
if (simReceiving || simTransmitting) {
simDontFallAsleep = 1;
return;
}
}
/*-----------------------------------------------------------------------------------*/
static u8_t
simDoLLSend(unsigned char *buf, int len, int uip_or_rime)
{
/* If radio already actively transmitting, drop packet*/
if(inSendFunction) {
return UIP_FW_DROPPED;
}
inSendFunction = 1;
/* If radio is turned off, do nothing */
if(!simRadioHWOn) {
inSendFunction = 0;
return UIP_FW_DROPPED;
}
/* Drop packet if data size too large */
if(len > UIP_BUFSIZE) {
inSendFunction = 0;
return UIP_FW_TOOLARGE;
}
/* Drop packet if no data length */
if(len <= 0) {
inSendFunction = 0;
return UIP_FW_ZEROLEN;
}
/* ** Good place to add explicit manchester/gcr-decoding */
/* Copy packet data to temporary storage */
simOutDataBuffer[0] = uip_or_rime;
memcpy(&simOutDataBuffer[1], buf, len);
simOutSize = len + 1;
/* Busy-wait until both radio HW and ether is ready */
{
int retries = 0;
while(retries < MAX_RETRIES && !simNoYield &&
(simSignalStrength > SS_INTERFERENCE || simReceiving)) {
retries++;
cooja_mt_yield();
if(!(simSignalStrength > SS_INTERFERENCE || simReceiving)) {
/* Wait one extra tick before transmission starts */
cooja_mt_yield();
}
}
}
if(simSignalStrength > SS_INTERFERENCE || simReceiving) {
inSendFunction = 0;
return UIP_FW_DROPPED;
}
// - Initiate transmission -
simTransmitting = 1;
// Busy-wait while transmitting
while(simTransmitting && !simNoYield) {
cooja_mt_yield();
}
inSendFunction = 0;
return UIP_FW_OK;
}
/*-----------------------------------------------------------------------------------*/
void
rime_driver_send(void)
{
/* log_message("rime driver send", "");*/
simDoLLSend(rimebuf_hdrptr(), rimebuf_totlen(), RIME);
}
/*-----------------------------------------------------------------------------------*/
u8_t
simDoSend()
{
/* If radio is turned off, reset uip_len */
if(!simRadioHWOn) {
uip_len = 0;
return UIP_FW_DROPPED;
}
if(uip_len > UIP_BUFSIZE) {
uip_len = 0;
return UIP_FW_DROPPED;
}
if(uip_len <= 0) {
return UIP_FW_ZEROLEN;
}
return simDoLLSend(&uip_buf[UIP_LLH_LEN], uip_len, UIP);
}
/*-----------------------------------------------------------------------------------*/
/**
* \brief Turn radio on.
*
* This function turns the radio hardware on.
*/
void
radio_on(void)
{
simRadioHWOn = 1;
}
/*-----------------------------------------------------------------------------------*/
/**
* \brief Turn radio off.
*
* This function turns the radio hardware off.
*/
void
radio_off(void)
{
simRadioHWOn = 0;
}
/*-----------------------------------------------------------------------------------*/
SIM_INTERFACE(radio_interface,
doInterfaceActionsBeforeTick,
doInterfaceActionsAfterTick);