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Extend packet size after creating 802.15.4 header; prepare radio chip with packet before waiting for neighbor phase to make phase wait time deterministic

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adamdunkels 2010-03-29 21:51:36 +00:00
parent b4b7e942b6
commit 9c58768b59
1 changed files with 66 additions and 39 deletions
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105
core/net/mac/contikimac.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: contikimac.c,v 1.16 2010/03/19 13:24:58 adamdunkels Exp $
* $Id: contikimac.c,v 1.17 2010/03/29 21:51:36 adamdunkels Exp $
*/
/**
@ -51,6 +51,7 @@
#include "sys/pt.h"
#include "sys/rtimer.h"
#include "cooja-debug.h"
#include "contiki-conf.h"
#ifdef EXPERIMENT_SETUP
@ -92,7 +93,6 @@ struct announcement_msg {
"num" field in the struct. */
#define ANNOUNCEMENT_MSG_HEADERLEN (sizeof(uint16_t) * 2)
#ifdef CONTIKIMAC_CONF_CYCLE_TIME
#define CYCLE_TIME (CONTIKIMAC_CONF_CYCLE_TIME)
#else
@ -103,11 +103,13 @@ struct announcement_msg {
#define CCA_COUNT_MAX 2
#define CCA_CHECK_TIME RTIMER_ARCH_SECOND / 8192
#define CCA_SLEEP_TIME RTIMER_ARCH_SECOND / 2000
#define CCA_SLEEP_TIME RTIMER_ARCH_SECOND / 2000 //+ CCA_CHECK_TIME
#define CHECK_TIME (CCA_COUNT_MAX * (CCA_CHECK_TIME + CCA_SLEEP_TIME))
#define STREAM_CCA_COUNT (CYCLE_TIME / (CCA_SLEEP_TIME + CCA_CHECK_TIME) - CCA_COUNT_MAX)
#define GUARD_TIME 3 * CHECK_TIME
#define INTER_PACKET_INTERVAL RTIMER_ARCH_SECOND / 2500
#define AFTER_ACK_DETECTECT_WAIT_TIME RTIMER_ARCH_SECOND / 1500
@ -116,7 +118,11 @@ struct announcement_msg {
#define SHORTEST_PACKET_SIZE 18
/* The cycle time for announcements. */
#define ANNOUNCEMENT_PERIOD 4 * CLOCK_SECOND
#ifdef ANNOUNCEMENT_CONF_PERIOD
#define ANNOUNCEMENT_PERIOD ANNOUNCEMENT_CONF_PERIOD
#else /* ANNOUNCEMENT_CONF_PERIOD */
#define ANNOUNCEMENT_PERIOD 1 * CLOCK_SECOND
#endif /* ANNOUNCEMENT_CONF_PERIOD */
/* The time before sending an announcement within one announcement
cycle. */
@ -124,7 +130,7 @@ struct announcement_msg {
#define STROBE_WAIT_TIME (RTIMER_ARCH_SECOND / 600)
#define STROBE_TIME (CYCLE_TIME + 8 * CHECK_TIME)
#define STROBE_TIME (CYCLE_TIME + 2 * CHECK_TIME)
#define ACK_LEN 3
@ -202,6 +208,7 @@ off(void)
}
}
/*---------------------------------------------------------------------------*/
static rtimer_clock_t cycle_start;
static char powercycle(struct rtimer *t, void *ptr);
static void
schedule_powercycle(struct rtimer *t, rtimer_clock_t time)
@ -267,7 +274,7 @@ powercycle(struct rtimer *t, void *ptr)
while(1) {
static uint8_t packet_seen;
static rtimer_clock_t t0, cycle_start;
static rtimer_clock_t t0;
static uint8_t count;
cycle_start = RTIMER_NOW();
@ -279,7 +286,7 @@ powercycle(struct rtimer *t, void *ptr)
t0 = RTIMER_NOW();
if(we_are_sending == 0) {
powercycle_turn_radio_on();
#if 0
#if 1
#if NURTIMER
while(RTIMER_CLOCK_LT(t0, RTIMER_NOW(), t0 + CCA_CHECK_TIME));
#else
@ -337,7 +344,7 @@ powercycle(struct rtimer *t, void *ptr)
leds_off(LEDS_RED);
break;
}
if(periods > 20 && !(NETSTACK_RADIO.receiving_packet() ||
if(periods > 10 && !(NETSTACK_RADIO.receiving_packet() ||
NETSTACK_RADIO.pending_packet())) {
leds_on(LEDS_GREEN);
powercycle_turn_radio_off();
@ -375,7 +382,9 @@ powercycle(struct rtimer *t, void *ptr)
RTIMER_NOW() - cycle_start < CYCLE_TIME - CCA_CHECK_TIME * CCA_COUNT_MAX);
if(RTIMER_NOW() - cycle_start < CYCLE_TIME) {
schedule_powercycle(t, CYCLE_TIME - (RTIMER_NOW() - cycle_start));
schedule_powercycle(t, CYCLE_TIME - (RTIMER_NOW() - cycle_start) + 1);
/* printf("cycle_start 0x%02x now 0x%02x wait 0x%02x\n",
cycle_start, RTIMER_NOW(), CYCLE_TIME - (RTIMER_NOW() - cycle_start));*/
PT_YIELD(&pt);
}
}
@ -428,7 +437,8 @@ format_announcement(char *hdr)
adata.announcement_magic[1] = ANNOUNCEMENT_MAGIC2;
adata.num = 0;
for(a = announcement_list();
a != NULL && adata.num < ANNOUNCEMENT_MAX; a = a->next) {
a != NULL && a->has_value && adata.num < ANNOUNCEMENT_MAX;
a = a->next) {
adata.data[adata.num].id = a->id;
adata.data[adata.num].value = a->value;
adata.num++;
@ -454,7 +464,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
uint8_t first_transmission = 1;
int strobes;
uint8_t got_strobe_ack = 0;
int len;
int hdrlen, len;
uint8_t is_broadcast = 0;
uint8_t is_reliable = 0;
uint8_t is_known_receiver = 0;
@ -467,7 +477,8 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
PRINTF("contikimac: send_packet data len 0\n");
return MAC_TX_ERR_FATAL;
}
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
is_broadcast = 1;
@ -491,7 +502,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
}
is_reliable = packetbuf_attr(PACKETBUF_ATTR_RELIABLE) ||
packetbuf_attr(PACKETBUF_ATTR_ERELIABLE);
if(WITH_STREAMING) {
if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
PACKETBUF_ATTR_PACKET_TYPE_STREAM) {
@ -508,6 +519,30 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
}
}
/* Create the MAC header for the data packet. */
hdrlen = NETSTACK_FRAMER.create();
if(hdrlen == 0) {
/* Failed to send */
PRINTF("contikimac: send failed, too large header\n");
return MAC_TX_ERR_FATAL;
}
/* Make sure that the packet is longer or equal to the shorest
packet length. */
if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
}
packetbuf_compact();
NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
transmit_len = packetbuf_totlen();
/* Remove the MAC-layer header since it will be recreated next time around. */
packetbuf_hdr_remove(hdrlen);
if(!is_broadcast && !is_streaming) {
#if WITH_PHASE_OPTIMIZATION
if(WITH_ACK_OPTIMIZATION) {
@ -516,7 +551,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
PACKETBUF_ATTR_PACKET_TYPE_ACK) {
ret = phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
CYCLE_TIME, 7 * CHECK_TIME,
CYCLE_TIME, GUARD_TIME,
mac_callback, mac_callback_ptr);
if(ret == PHASE_DEFERRED) {
return MAC_TX_DEFERRED;
@ -527,7 +562,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
}
} else {
ret = phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
CYCLE_TIME, 7 * CHECK_TIME,
CYCLE_TIME, GUARD_TIME,
mac_callback, mac_callback_ptr);
if(ret == PHASE_DEFERRED) {
return MAC_TX_DEFERRED;
@ -539,25 +574,6 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
#endif /* WITH_PHASE_OPTIMIZATION */
}
/* Make sure that the packet is longer or equal to the shorest
packet length. */
if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
}
/* Create the MAC header for the data packet. */
len = NETSTACK_FRAMER.create();
if(len == 0) {
/* Failed to send */
PRINTF("contikimac: send failed, too large header\n");
return MAC_TX_ERR_FATAL;
}
packetbuf_compact();
NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
transmit_len = packetbuf_totlen();
/* By setting we_are_sending to one, we ensure that the rtimer
@ -639,9 +655,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
watchdog_periodic();
/* if(is_known_receiver && strobes > MAX_PHASE_STROBES) {
if(is_known_receiver && strobes > MAX_PHASE_STROBES) {
break;
}*/
}
len = 0;
@ -674,6 +690,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
#endif
len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
if(len == ACK_LEN) {
leds_on(LEDS_BLUE);
got_strobe_ack = 1;
encounter_time = last_transmission_time;
break;
@ -737,6 +754,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
#if WITH_PHASE_OPTIMIZATION
if(!first_transmission) {
/* COOJA_DEBUG_PRINTF("first phase 0x%02x\n", encounter_time % CYCLE_TIME);*/
if(WITH_ACK_OPTIMIZATION) {
if(collisions == 0 && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
@ -752,6 +772,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
}
#endif /* WITH_PHASE_OPTIMIZATION */
leds_off(LEDS_BLUE);
return ret;
}
/*---------------------------------------------------------------------------*/
@ -771,6 +792,8 @@ input_packet(void)
asleep. */
off();
/* printf("cycle_start 0x%02x 0x%02x\n", cycle_start, cycle_start % CYCLE_TIME);*/
if(packetbuf_totlen() > 0 && NETSTACK_FRAMER.parse()) {
@ -832,9 +855,6 @@ send_announcement(void *ptr)
announcement_len = format_announcement(packetbuf_dataptr());
if(announcement_len > 0) {
if(announcement_len < SHORTEST_PACKET_SIZE) {
announcement_len = SHORTEST_PACKET_SIZE;
}
packetbuf_set_datalen(announcement_len);
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
@ -846,6 +866,13 @@ send_announcement(void *ptr)
int i, collisions;
we_are_sending = 1;
/* Make sure that the packet is longer or equal to the shorest
packet length. */
if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
}
collisions = 0;
/* Check for collisions */
for(i = 0; i < CCA_COUNT_MAX; ++i) {