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osd-contiki/cpu/avr/radio/mac/sicslowmac.c

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/*
* Copyright (c) 2008, 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.
*
* This file is part of the Contiki operating system.
*
* $Id: sicslowmac.c,v 1.6 2008/12/10 21:26:05 c_oflynn Exp $
*/
/**
* \file
* Example glue code between the existing MAC code and the
* Contiki mac interface
*
* \author
* Adam Dunkels <adam@sics.se>
* Eric Gnoske <egnoske@gmail.com>
* Blake Leverett <bleverett@gmail.com>
*
* \addtogroup rf230mac
*/
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <avr/eeprom.h>
#include <util/delay.h>
#include "net/rime/rimebuf.h"
#include "zmac.h"
#include "mac.h"
#include "frame.h"
#include "radio.h"
#include "tcpip.h"
#include "sicslowmac.h"
#include "sicslowpan.h"
#include "ieee-15-4-manager.h"
/* Macros */
#define DEBUG 0
#define MAX_EVENTS 10
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#define SICSLOW_CORRECTION_DELAY 70
#else
#define PRINTF(...)
#define SICSLOW_CORRECTION_DELAY 7
#endif
#ifdef JACKDAW
#include "sicslow_ethernet.h"
#define LOG_FRAME(x,y) mac_logTXtoEthernet(x,y)
#else
#define LOG_FRAME(x,y)
#endif
/* Globals */
static struct mac_driver mac_driver_struct;
static struct mac_driver *pmac_driver = &mac_driver_struct;
extern ieee_15_4_manager_t ieee15_4ManagerAddress;
static parsed_frame_t *parsed_frame;
const struct mac_driver sicslowmac_driver = {
sicslowmac_dataRequest,
/* read_packet, */
/* set_receive_function, */
/* on, */
/* off, */
};
static struct {
uint8_t head;
uint8_t tail;
event_object_t event_object[MAX_EVENTS];
} event_queue;
/* Prototypes */
static void setinput(void (*r)(const struct mac_driver *d));
void (*pinput)(const struct mac_driver *r);
void sicslowmac_unknownIndication(void);
void (*sicslowmac_snifferhook)(const struct mac_driver *r) = NULL;
/*---------------------------------------------------------------------------*/
/**
* \brief Checks for any pending events in the queue.
*
* \return True if there is a pending event, else false.
*/
uint8_t
mac_event_pending(void)
{
return (event_queue.head != event_queue.tail);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Puts an event into the queue of events.
*
* \param object is a pointer to the event to add to queue.
*/
void
mac_put_event(event_object_t *object)
{
uint8_t newhead;
if ((event_queue.head + 1) % MAX_EVENTS == event_queue.tail){
/* queue full, get outta here */
return;
}
newhead = event_queue.head;
/* store in queue */
event_queue.event_object[newhead] = *object;
/* calculate new head index */
newhead++;
if (newhead >= MAX_EVENTS){
newhead = 0;
}
event_queue.head = newhead;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Pulls an event from the event queue.
* Assumes that there is an event in the queue. See mac_event_pending().
*
* \return Pointer to the event object, or NULL in the event of empty queue.
*/
event_object_t
*mac_get_event(void)
{
event_object_t *object = NULL;
volatile uint8_t newtail;
newtail = event_queue.tail;
object = &(event_queue.event_object[newtail]);
/* calculate new tail */
newtail++;
if (newtail >= MAX_EVENTS){
newtail = 0;
}
event_queue.tail = newtail;
return(object);
}
void mac_pollhandler(void)
{
mac_task(0, NULL);
}
/*---------------------------------------------------------------------------*/
/**
* \brief This is the main loop task for the MAC. Called by the
* main application loop.
*/
void
mac_task(process_event_t ev, process_data_t data)
{
/* check for event in queue */
event_object_t *event;
if(mac_event_pending()){
event = mac_get_event();
/* Handle events from radio */
if (event){
if (event->event == MAC_EVENT_RX){
/* got a frame, find out with kind of frame */
parsed_frame = (parsed_frame_t *)event->data;
if (parsed_frame->fcf->frameType == DATAFRAME){
sicslowmac_dataIndication();
} else {
/* Hook to cath unknown frames */
sicslowmac_unknownIndication();
}
/* Frame no longer in use */
parsed_frame->in_use = false;
}
if (event->event == MAC_EVENT_DROPPED){
/* Frame was dropped */
PRINTF("sicslowmac: Frame Dropped!\n");
}
}
}
}
/*---------------------------------------------------------------------------*/
void
setinput(void (*r)(const struct mac_driver *d))
{
pinput = r;
}
/*---------------------------------------------------------------------------*/
static uint8_t dest_reversed[UIP_LLADDR_LEN];
static uint8_t src_reversed[UIP_LLADDR_LEN];
# define MSB(u16) (((uint8_t* )&u16)[1])
# define LSB(u16) (((uint8_t* )&u16)[0])
void
sicslowmac_dataIndication(void)
{
rimebuf_clear();
#if UIP_LLADDR_LEN == 8
/* Finally, get the stuff into the rime buffer.... */
rimebuf_copyfrom(parsed_frame->payload, parsed_frame->payload_length);
rimebuf_set_datalen(parsed_frame->payload_length);
memcpy(dest_reversed, (uint8_t *)parsed_frame->dest_addr, UIP_LLADDR_LEN);
memcpy(src_reversed, (uint8_t *)parsed_frame->src_addr, UIP_LLADDR_LEN);
/* Change addresses to expected byte order */
byte_reverse((uint8_t *)dest_reversed, UIP_LLADDR_LEN);
byte_reverse((uint8_t *)src_reversed, UIP_LLADDR_LEN);
rimebuf_set_addr(RIMEBUF_ADDR_RECEIVER, (const rimeaddr_t *)dest_reversed);
rimebuf_set_addr(RIMEBUF_ADDR_SENDER, (const rimeaddr_t *)src_reversed);
#elif UIP_CONF_USE_RUM
/* Finally, get the stuff into the rime buffer.... */
rimebuf_copyfrom(parsed_frame->payload + UIP_DATA_RUM_OFFSET, parsed_frame->payload_length - UIP_DATA_RUM_OFFSET);
rimebuf_set_datalen(parsed_frame->payload_length + UIP_DATA_RUM_OFFSET);
dest_reversed[0] = MSB(parsed_frame->dest_pid);
dest_reversed[1] = LSB(parsed_frame->dest_pid);
dest_reversed[2] = 0;
dest_reversed[3] = 0;
dest_reversed[4] = MSB(parsed_frame->payload[0]); //FinalDestAddr
dest_reversed[5] = LSB(parsed_frame->payload[1]);
src_reversed[0] = MSB(parsed_frame->src_pid);
src_reversed[1] = LSB(parsed_frame->src_pid);
src_reversed[2] = 0;
src_reversed[3] = 0;
src_reversed[4] = MSB(parsed_frame->payload[2]); //originAddr
src_reversed[5] = LSB(parsed_frame->payload[3]);
#else
/* Finally, get the stuff into the rime buffer.... */
rimebuf_copyfrom(parsed_frame->payload, parsed_frame->payload_length);
rimebuf_set_datalen(parsed_frame->payload_length);
dest_reversed[0] = MSB(parsed_frame->dest_pid);
dest_reversed[1] = LSB(parsed_frame->dest_pid);
dest_reversed[2] = 0;
dest_reversed[3] = 0;
dest_reversed[4] = MSB(parsed_frame->dest_addr->addr16);
dest_reversed[5] = LSB(parsed_frame->dest_addr->addr16);
src_reversed[0] = MSB(parsed_frame->src_pid);
src_reversed[1] = LSB(parsed_frame->src_pid);
src_reversed[2] = 0;
src_reversed[3] = 0;
src_reversed[4] = MSB(parsed_frame->src_addr->addr16);
src_reversed[5] = LSB(parsed_frame->src_addr->addr16);
rimebuf_set_addr(RIMEBUF_ADDR_RECEIVER, (const rimeaddr_t *)dest_reversed);
rimebuf_set_addr(RIMEBUF_ADDR_SENDER, (const rimeaddr_t *)src_reversed);
#endif
PRINTF("sicslowmac: hand off frame to sicslowpan \n");
pinput(pmac_driver);
}
void
sicslowmac_unknownIndication(void)
{
if (sicslowmac_snifferhook) {
rimebuf_clear();
/* Finally, get the stuff into the rime buffer.... */
rimebuf_copyfrom(parsed_frame->payload, parsed_frame->payload_length);
rimebuf_set_datalen(parsed_frame->payload_length);
#if UIP_LLADDR_LEN == 8
memcpy(dest_reversed, (uint8_t *)parsed_frame->dest_addr, UIP_LLADDR_LEN);
memcpy(src_reversed, (uint8_t *)parsed_frame->src_addr, UIP_LLADDR_LEN);
/* Change addresses to expected byte order */
byte_reverse((uint8_t *)dest_reversed, UIP_LLADDR_LEN);
byte_reverse((uint8_t *)src_reversed, UIP_LLADDR_LEN);
rimebuf_set_addr(RIMEBUF_ADDR_RECEIVER, (const rimeaddr_t *)dest_reversed);
rimebuf_set_addr(RIMEBUF_ADDR_SENDER, (const rimeaddr_t *)src_reversed);
#elif UIP_CONF_USE_RUM
dest_reversed[0] = MSB(parsed_frame->dest_pid);
dest_reversed[1] = LSB(parsed_frame->dest_pid);
dest_reversed[2] = 0;
dest_reversed[3] = 0;
dest_reversed[4] = MSB(parsed_frame->payload[0]); //FinalDestAddr
dest_reversed[5] = LSB(parsed_frame->payload[1]);
src_reversed[0] = MSB(parsed_frame->src_pid);
src_reversed[1] = LSB(parsed_frame->src_pid);
src_reversed[2] = 0;
src_reversed[3] = 0;
src_reversed[4] = MSB(parsed_frame->payload[2]); //originAddr
src_reversed[5] = LSB(parsed_frame->payload[3]);
#else
dest_reversed[0] = MSB(parsed_frame->dest_pid);
dest_reversed[1] = LSB(parsed_frame->dest_pid);
dest_reversed[2] = 0;
dest_reversed[3] = 0;
dest_reversed[4] = MSB(parsed_frame->dest_addr->addr16);
dest_reversed[5] = LSB(parsed_frame->dest_addr->addr16);
src_reversed[0] = MSB(parsed_frame->src_pid);
src_reversed[1] = LSB(parsed_frame->src_pid);
src_reversed[2] = 0;
src_reversed[3] = 0;
src_reversed[4] = MSB(parsed_frame->src_addr->addr16);
src_reversed[5] = LSB(parsed_frame->src_addr->addr16);
rimebuf_set_addr(RIMEBUF_ADDR_RECEIVER, (const rimeaddr_t *)dest_reversed);
rimebuf_set_addr(RIMEBUF_ADDR_SENDER, (const rimeaddr_t *)src_reversed);
#endif
PRINTF("sicslowmac: hand off frame to sniffer \n");
sicslowmac_snifferhook(pmac_driver);
}
}
/*---------------------------------------------------------------------------*/
/**
* \brief This is the implementation of the 15.4 MAC Data Request
* primitive.
*
* \return Integer denoting success or failure.
* \retval 0 Failure.
* \retval 1 Success.
*
* The data request primitive creates the frame header based
* on static and dynamic data. The static data will be refined
* in phase II of the project. The frame payload and length are
* retrieved from the rime buffer and rime length respectively.
*
* When the header and payload are assembled into the
* frame_create_params structure, the frame is created
* by a call to frame_tx_create and then transmited via
* radio_send_data.
*/
/*---------------------------------------------------------------------------*/
int
sicslowmac_dataRequest(void)
{
_delay_ms(SICSLOW_CORRECTION_DELAY);
/* create structure to store result. */
frame_create_params_t params;
frame_result_t result;
/* Save the msduHandle in a global variable. */
msduHandle = rimebuf_attr(RIMEBUF_ATTR_PACKET_ID);
/* Build the FCF. */
params.fcf.frameType = DATAFRAME;
params.fcf.securityEnabled = false;
params.fcf.framePending = false;
params.fcf.ackRequired = rimebuf_attr(RIMEBUF_ATTR_RELIABLE);
params.fcf.panIdCompression = false;
/* Insert IEEE 802.15.4 (2003) version bit. */
params.fcf.frameVersion = IEEE802154_2003;
/* Increment and set the data sequence number. */
params.seq = macDSN++;
/* Complete the addressing fields. */
/**
\todo For phase 1 the addresses are all long. We'll need a mechanism
in the rime attributes to tell the mac to use long or short for phase 2.
*/
params.fcf.srcAddrMode = LONGADDRMODE;
params.dest_pid = ieee15_4ManagerAddress.get_dst_panid();
/*
* If the output address is NULL in the Rime buf, then it is broadcast
* on the 802.15.4 network.
*/
if(rimeaddr_cmp(rimebuf_addr(RIMEBUF_ADDR_RECEIVER), &rimeaddr_null) ) {
/* Broadcast requires short address mode. */
params.fcf.destAddrMode = SHORTADDRMODE;
params.dest_pid = BROADCASTPANDID;
params.dest_addr.addr16 = BROADCASTADDR;
} else {
/* Phase 1.5 - end nodes send to anyone? */
memcpy(&params.dest_addr, (uint8_t *)rimebuf_addr(RIMEBUF_ADDR_RECEIVER), LONG_ADDR_LEN);
/* Change from sicslowpan byte arrangement to sicslowmac */
byte_reverse((uint8_t*)&params.dest_addr.addr64, LONG_ADDR_LEN);
/* Phase 1 - end nodes only sends to pan coordinator node. */
/* params.dest_addr.addr64 = ieee15_4ManagerAddress.get_coord_long_addr(); */
params.fcf.destAddrMode = LONGADDRMODE;
}
/* Set the source PAN ID to the global variable. */
params.src_pid = ieee15_4ManagerAddress.get_src_panid();
/*
* Set up the source address using only the long address mode for
* phase 1.
*/
params.src_addr.addr64 = ieee15_4ManagerAddress.get_long_addr();
/* Copy the payload data. */
params.payload_len = rimebuf_datalen();
params.payload = rimebuf_dataptr();
/* Create transmission frame. */
frame_tx_create(&params, &result);
/* Log if needed */
LOG_FRAME(&params, &result);
/* Retry up to this many times to send the packet if radio is busy */
uint8_t retry_count = 3;
while(retry_count) {
PRINTF("sicslowmac: sending packet of length %d to radio, result:", result.length);
/* Send data to radio. */
radio_status_t rv = radio_send_data(result.length, result.frame);
if (rv == RADIO_SUCCESS) {
PRINTF(" Success\n");
return 1; /* True says that the packet could be sent */
}
if (rv != RADIO_WRONG_STATE) {
PRINTF(" Failed\n");
return 0;
}
PRINTF(" Radio busy, retrying\n");
/** \todo: Fix delay in sicslowmac so they do not block receiving */
//We have blocking delay here, it is safest this way. BUT doesn't solve the
//problem of TX when you are RXing.. as the RX code can't execute!
if (retry_count == 3) {
_delay_ms(10);
} else if (retry_count == 2) {
_delay_ms(50);
} else if (retry_count == 1) {
_delay_ms(200);
}
retry_count--;
}
PRINTF("sicslowmac: Unable to send packet, dropped\n");
return 0;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Stub function that will be implemented in phase 2 to cause
* end nodes to sleep.
*/
int
mac_wake(void)
{
return 1;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Stub function that will be implemented in phase 2 to cause
* end nodes to sleep.
*/
int
mac_sleep(void)
{
return 1;
}
/*---------------------------------------------------------------------------*/
const struct mac_driver *
sicslowmac_init(const struct radio_driver *d)
{
/* AD: commented out the radio_driver code for now.*/
/* radio = d;
radio->set_receive_function(input_packet);
radio->on();*/
return &sicslowmac_driver;
}
/*---------------------------------------------------------------------------*/
/**
* \brief This is the implementation of the 15.4 MAC Reset Request
* primitive.
* \param setDefaultPIB True if the default PIB values should be set.
* \return Integer denoting success or failure.
* \retval 0 Failure.
* \retval 1 Success.
*
* Sets all PIB values to default.
*/
void
sicslowmac_resetRequest (bool setDefaultPIB)
{
if(setDefaultPIB){
/* initialize all of the MAC PIB variables to their default values */
macCoordShortAddress = 0xffff;
macDSN = rand() % 256;
macSrcPANId = SOURCE_PAN_ID;
macDstPANId = DEST_PAN_ID;
macShortAddress = 0xffff;
/* Setup the address of this device by reading a stored address from eeprom. */
/** \todo This might be read from the serial eeprom onboard Raven. */
AVR_ENTER_CRITICAL_REGION();
eeprom_read_block ((void *)&macLongAddr, EEPROMMACADDRESS, 8);
byte_reverse((uint8_t *) &macLongAddr, 8);
AVR_LEAVE_CRITICAL_REGION();
}
}
parsed_frame_t * sicslowmac_get_frame(void)
{
return parsed_frame;
}
/*---------------------------------------------------------------------------*/
struct mac_driver * sicslowmac_get_driver(void)
{
return pmac_driver;
}
/*---------------------------------------------------------------------------*/
PROCESS(mac_process, "802.15.4 MAC process");
PROCESS_THREAD(mac_process, ev, data)
{
PROCESS_POLLHANDLER(mac_pollhandler());
PROCESS_BEGIN();
radio_status_t return_value;
/* init radio */
/** \todo: this screws up if calosc is set to TRUE, find out why? */
return_value = radio_init(false, NULL, NULL, NULL);
#if DEBUG
if (return_value == RADIO_SUCCESS) {
printf("Radio init successful.\n");
} else {
printf("Radio init failed with return: %d\n", return_value);
}
#endif
uint8_t eeprom_channel;
uint8_t eeprom_check;
eeprom_channel = eeprom_read_byte(9);
eeprom_check = eeprom_read_byte(10);
if ((eeprom_channel < 11) || (eeprom_channel > 26) || ((uint8_t)eeprom_channel != (uint8_t)~eeprom_check)) {
#if UIP_CONF_USE_RUM
eeprom_channel = 19; //Default
#else
eeprom_channel = 24; //Default
#endif
}
radio_set_operating_channel(eeprom_channel);
radio_use_auto_tx_crc(true);
radio_set_trx_state(TRX_OFF);
mac_init();
/* Set up MAC function pointers and sicslowpan callback. */
pmac_driver->set_receive_function = setinput;
pmac_driver->send = sicslowmac_dataRequest;
sicslowpan_init(pmac_driver);
ieee_15_4_init(&ieee15_4ManagerAddress);
radio_set_trx_state(RX_AACK_ON);
while(1) {
PROCESS_YIELD();
mac_task(ev, data);
}
PROCESS_END();
}
void byte_reverse(uint8_t * bytes, uint8_t num)
{
uint8_t tempbyte;
uint8_t i, j;
i = 0;
j = num - 1;
while(i < j) {
tempbyte = bytes[i];
bytes[i] = bytes[j];
bytes[j] = tempbyte;
j--;
i++;
}
return;
}
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