Two major changes:
* Low-power streaming. Experimental support for a low-power mode which allows rapid exchange of packets with a 16% duty cycle. Does not seem to function correctly yet though. * Phase locking. When the phase of a neighbor has been detected, the sender assumes that the neighbor will keeps it phase and does not send more strobes than necessary to hit the receiver's channel check - even if the receiver does not acknowledge the reception of the strobes when it should have been awake. Instead, the sender stops strobing and tries again at a later time.
This commit is contained in:
adamdunkels
parent
0035a70537
commit
7bab9316da
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: contikimac.c,v 1.11 2010/03/14 12:13:54 oliverschmidt Exp $
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* $Id: contikimac.c,v 1.12 2010/03/14 22:59:23 adamdunkels Exp $
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*/
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/**
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@ -60,7 +60,7 @@
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#include <string.h>
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#ifndef WITH_ACK_OPTIMIZATION
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#define WITH_ACK_OPTIMIZATION 0
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#define WITH_ACK_OPTIMIZATION 1
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#endif
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#ifndef WITH_PHASE_OPTIMIZATION
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#define WITH_PHASE_OPTIMIZATION 1
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@ -97,10 +97,14 @@ struct announcement_msg {
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#define CYCLE_TIME (RTIMER_ARCH_SECOND / MAC_CHANNEL_CHECK_RATE)
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#endif
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#define MAX_PHASE_STROBES 8
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#define CCA_COUNT_MAX 2
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#define CCA_CHECK_TIME RTIMER_ARCH_SECOND / 8192
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#define CCA_SLEEP_TIME RTIMER_ARCH_SECOND / 2000 + CCA_CHECK_TIME
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#define CHECK_TIME (CCA_COUNT_MAX * (CCA_CHECK_TIME + CCA_SLEEP_TIME))
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#define CHECK_TIME (CCA_COUNT_MAX * (CCA_CHECK_TIME + CCA_SLEEP_TIME))
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#define STREAM_CCA_COUNT (CYCLE_TIME / (CCA_SLEEP_TIME + CCA_CHECK_TIME) - CCA_COUNT_MAX)
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#define INTER_PACKET_INTERVAL RTIMER_ARCH_SECOND / 2500
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#define AFTER_ACK_DETECTECT_WAIT_TIME RTIMER_ARCH_SECOND / 1500
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@ -166,30 +170,16 @@ PHASE_LIST(phase_list, MAX_PHASE_NEIGHBORS);
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#endif /* WITH_PHASE_OPTIMIZATION */
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static uint8_t is_streaming;
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static volatile uint8_t is_streaming;
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static rimeaddr_t is_streaming_to, is_streaming_to_too;
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static rtimer_clock_t stream_until;
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static volatile rtimer_clock_t stream_until;
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#define DEFAULT_STREAM_TIME (RTIMER_ARCH_SECOND)
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#define DEFAULT_STREAM_TIME (2 * RTIMER_ARCH_SECOND / MAC_CHANNEL_CHECK_RATE)
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#ifndef MIN
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#define MIN(a, b) ((a) < (b)? (a) : (b))
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#endif /* MIN */
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static volatile uint8_t packet_indication_flag;
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static volatile uint16_t packet_indicated_but_not_received,
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packet_indicated_but_not_received_clear_third_time;
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volatile uint16_t
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packet_indicated_but_not_received_clear_second_time;
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struct cca_checks_stats {
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volatile char check[CCA_COUNT_MAX];
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};
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#define LATEST_CCA_CHECKS_NUM 16
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static volatile struct cca_checks_stats cca_checks[LATEST_CCA_CHECKS_NUM];
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static volatile struct cca_checks_stats *latest_cca_check = &cca_checks[LATEST_CCA_CHECKS_NUM - 1];
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/*---------------------------------------------------------------------------*/
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static void
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@ -204,7 +194,7 @@ on(void)
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static void
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off(void)
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{
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if(contikimac_is_on && radio_is_on != 0 && is_listening == 0 && is_streaming == 0) {
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if(contikimac_is_on && radio_is_on != 0 && is_listening == 0) {
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radio_is_on = 0;
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NETSTACK_RADIO.off();
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}
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@ -276,60 +266,56 @@ powercycle(struct rtimer *t, void *ptr)
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while(1) {
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static uint8_t packet_seen;
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static rtimer_clock_t t0, cycle_start;
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static uint8_t count;
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static uint8_t clear_second_time, clear_third_time;
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static uint8_t count, count_max;
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cycle_start = RTIMER_NOW();
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for(count = 1; count < LATEST_CCA_CHECKS_NUM; ++count) {
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cca_checks[count - 1] = cca_checks[count];
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}
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latest_cca_check->check[0] =
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latest_cca_check->check[1] = 2;
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packet_seen = 0;
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clear_second_time = clear_third_time = 0;
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if(we_are_sending == 0) {
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latest_cca_check->check[0] =
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latest_cca_check->check[1] = -1;
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count_max = CCA_COUNT_MAX;
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if(is_streaming) {
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count_max = STREAM_CCA_COUNT;
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}
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do {
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for(count = 0; count < CCA_COUNT_MAX; ++count) {
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t0 = RTIMER_NOW();
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powercycle_turn_radio_on();
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if(we_are_sending == 0) {
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powercycle_turn_radio_on();
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#if NURTIMER
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while(RTIMER_CLOCK_LT(t0, RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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while(RTIMER_CLOCK_LT(t0, RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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#else
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while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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while(RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + CCA_CHECK_TIME));
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#endif
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if(NETSTACK_RADIO.channel_clear() == 0) {
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latest_cca_check->check[count] = 0;
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packet_indication_flag = 1;
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packet_seen = 1;
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break;
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} else {
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latest_cca_check->check[count] = 1;
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/* Check if a packet is seen in the air. If so, we keep the
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radio on for a while (LISTEN_TIME_AFTER_PACKET_DETECTED) to
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be able to receive the packet. We also continuously check
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the radio medium to make sure that we wasn't woken up by a
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false positive: a spurious radio interference that was not
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caused by an incoming packet. */
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if(NETSTACK_RADIO.channel_clear() == 0) {
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packet_seen = 1;
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break;
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}
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powercycle_turn_radio_off();
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}
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powercycle_turn_radio_off();
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schedule_powercycle(t, CCA_SLEEP_TIME + CCA_CHECK_TIME);
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PT_YIELD(&pt);
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}
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#if 1
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/* If there were a packet in the air, turn radio on */
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if(packet_seen) {
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static rtimer_clock_t start;
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static uint8_t silence_periods, periods;
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start = RTIMER_NOW();
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periods = silence_periods = 0;
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while(we_are_sending == 0 && radio_is_on &&
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RTIMER_CLOCK_LT(RTIMER_NOW(), (start + LISTEN_TIME_AFTER_PACKET_DETECTED))) {
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/* Check for two consecutive periods of non-activity. If we
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see two such periods, we turn the radio off. Also, if a
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packet has been successfully received (as indicated by
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the NETSTACK_RADIO.pending_packet() function), we stop
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/* Check for a number of consecutive periods of
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non-activity. If we see two such periods, we turn the
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radio off. Also, if a packet has been successfully
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received (as indicated by the
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NETSTACK_RADIO.pending_packet() function), we stop
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listening. */
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if(NETSTACK_RADIO.channel_clear()) {
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++silence_periods;
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silence_periods = 0;
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}
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if(silence_periods > 5) {
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latest_cca_check->check[count] = -silence_periods;
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leds_on(LEDS_RED);
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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@ -354,7 +339,6 @@ powercycle(struct rtimer *t, void *ptr)
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}
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if(periods > 10 && !(NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet())) {
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latest_cca_check->check[count] = periods;
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leds_on(LEDS_GREEN);
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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}
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if(radio_is_on && !(NETSTACK_RADIO.receiving_packet() &&
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NETSTACK_RADIO.pending_packet())) {
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latest_cca_check->check[count] = -78;
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leds_on(LEDS_RED + LEDS_GREEN);
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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@ -383,34 +366,14 @@ powercycle(struct rtimer *t, void *ptr)
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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leds_off(LEDS_RED + LEDS_GREEN);
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}
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} else {
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#if CONTIKIMAC_CONF_COMPOWER
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compower_accumulate(&compower_idle_activity);
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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}
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#else /* 0 */
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if(packet_seen) {
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schedule_powercycle(t, LISTEN_TIME);
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PT_YIELD(&pt);
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if(!(NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet())) {
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powercycle_turn_radio_off();
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#if CONTIKIMAC_CONF_COMPOWER
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compower_accumulate(&compower_idle_activity);
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#endif /* CONTIKIMAC_CONF_COMPOWER */
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}
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}
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#endif /* 0 */
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} while(is_streaming &&
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RTIMER_NOW() - cycle_start < CYCLE_TIME - CCA_CHECK_TIME * CCA_COUNT_MAX);
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/* If the packet indication flag is still set, it means that
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there was never a packet received by the radio. We increase
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the packet_indicated_but_not_received counter. */
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if(packet_indication_flag) {
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packet_indicated_but_not_received += packet_indication_flag;
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packet_indication_flag = 0;
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}
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}
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if(RTIMER_NOW() - cycle_start < CYCLE_TIME) {
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schedule_powercycle(t, CYCLE_TIME - (RTIMER_NOW() - cycle_start));
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PT_YIELD(&pt);
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{
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rtimer_clock_t t0;
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rtimer_clock_t t;
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rtimer_clock_t encounter_time = 0;
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rtimer_clock_t encounter_time = 0, last_transmission_time = 0;
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uint8_t first_transmission = 1;
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int strobes;
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int got_strobe_ack = 0;
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uint8_t got_strobe_ack = 0;
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int len;
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int is_broadcast = 0;
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int is_reliable = 0;
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uint8_t is_broadcast = 0;
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uint8_t is_reliable = 0;
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uint8_t is_known_receiver = 0;
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uint8_t collisions;
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int transmit_len;
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int i;
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int ret;
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if(packetbuf_totlen() == 0) {
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PRINTF("contikimac: send_packet data len 0\n");
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return MAC_TX_ERR_FATAL;
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}
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#if WITH_PHASE_OPTIMIZATION
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#if WITH_ACK_OPTIMIZATION
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/* Wait until the receiver is expected to be awake */
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if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 6 * CHECK_TIME,
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mac_callback, mac_callback_ptr) == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
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}
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}
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#else /* WITH_ACK_OPTIMIZATION */
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if(is_streaming == 0) {
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if(phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 6 * CHECK_TIME,
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mac_callback, mac_callback_ptr) == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
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}
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}
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#endif /* WITH_ACK_OPTIMIZATION */
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#endif /* WITH_PHASE_OPTIMIZATION */
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/* Make sure that the packet is longer or equal to the shorest
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packet length. */
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if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
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PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
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packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
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}
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/* Create the MAC header for the data packet. */
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packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
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if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
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is_broadcast = 1;
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@ -545,7 +479,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[5],
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[6],
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[7]);
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#else
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#else /* UIP_CONF_IPV6 */
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PRINTDEBUG("contikimac: send unicast to %u.%u\n",
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0],
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1]);
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@ -553,6 +487,63 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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}
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is_reliable = packetbuf_attr(PACKETBUF_ATTR_RELIABLE) ||
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packetbuf_attr(PACKETBUF_ATTR_ERELIABLE);
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if(WITH_STREAMING) {
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if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
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PACKETBUF_ATTR_PACKET_TYPE_STREAM) {
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is_streaming = 1;
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if(rimeaddr_cmp(&is_streaming_to, &rimeaddr_null)) {
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rimeaddr_copy(&is_streaming_to,
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
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} else if(!rimeaddr_cmp
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(&is_streaming_to, packetbuf_addr(PACKETBUF_ADDR_RECEIVER))) {
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rimeaddr_copy(&is_streaming_to_too,
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
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}
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stream_until = RTIMER_NOW() + DEFAULT_STREAM_TIME;
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}
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}
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if(!is_broadcast && !is_streaming) {
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#if WITH_PHASE_OPTIMIZATION
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if(WITH_ACK_OPTIMIZATION) {
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/* Wait until the receiver is expected to be awake */
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if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
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PACKETBUF_ATTR_PACKET_TYPE_ACK) {
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ret = phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 7 * CHECK_TIME,
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mac_callback, mac_callback_ptr);
|
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if(ret == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
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}
|
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if(ret != PHASE_UNKNOWN) {
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is_known_receiver = 1;
|
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}
|
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}
|
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} else {
|
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ret = phase_wait(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
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CYCLE_TIME, 7 * CHECK_TIME,
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mac_callback, mac_callback_ptr);
|
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if(ret == PHASE_DEFERRED) {
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return MAC_TX_DEFERRED;
|
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}
|
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if(ret != PHASE_UNKNOWN) {
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is_known_receiver = 1;
|
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}
|
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}
|
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#endif /* WITH_PHASE_OPTIMIZATION */
|
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}
|
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|
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/* Make sure that the packet is longer or equal to the shorest
|
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packet length. */
|
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if(packetbuf_totlen() < SHORTEST_PACKET_SIZE) {
|
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PRINTF("contikimac: shorter than shortest (%d)\n", packetbuf_totlen());
|
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packetbuf_set_datalen(SHORTEST_PACKET_SIZE);
|
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}
|
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|
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/* Create the MAC header for the data packet. */
|
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len = NETSTACK_FRAMER.create();
|
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if(len == 0) {
|
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/* Failed to send */
|
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|
|
@ -566,24 +557,6 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
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transmit_len = packetbuf_totlen();
|
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|
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|
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#if WITH_STREAMING
|
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if(packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) ==
|
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PACKETBUF_ATTR_PACKET_TYPE_STREAM) {
|
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is_streaming = 1;
|
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if(rimeaddr_cmp(&is_streaming_to, &rimeaddr_null)) {
|
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rimeaddr_copy(&is_streaming_to,
|
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
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} else
|
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if(!rimeaddr_cmp
|
||||
(&is_streaming_to, packetbuf_addr(PACKETBUF_ADDR_RECEIVER))) {
|
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rimeaddr_copy(&is_streaming_to_too,
|
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packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
||||
}
|
||||
stream_until = RTIMER_NOW() + DEFAULT_STREAM_TIME;
|
||||
}
|
||||
#endif /* WITH_STREAMING */
|
||||
|
||||
|
||||
/* By setting we_are_sending to one, we ensure that the rtimer
|
||||
powercycle interrupt do not interfere with us sending the packet. */
|
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we_are_sending = 1;
|
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|
|
@ -644,6 +617,11 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
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return MAC_TX_COLLISION;
|
||||
}
|
||||
|
||||
if(!is_broadcast) {
|
||||
on();
|
||||
}
|
||||
|
||||
|
||||
t0 = RTIMER_NOW();
|
||||
t = RTIMER_NOW();
|
||||
#if NURTIMER
|
||||
|
|
@ -656,6 +634,10 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
|||
RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + STROBE_TIME); strobes++) {
|
||||
#endif
|
||||
|
||||
if(is_known_receiver && strobes > MAX_PHASE_STROBES) {
|
||||
break;
|
||||
}
|
||||
|
||||
/* Let the watchdog know we are still alive. */
|
||||
watchdog_periodic();
|
||||
|
||||
|
|
@ -664,22 +646,14 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
|||
t = RTIMER_NOW();
|
||||
|
||||
|
||||
/*if(is_broadcast) {
|
||||
NETSTACK_RADIO.transmit(transmit_len);
|
||||
off();b
|
||||
} else*/ {
|
||||
{
|
||||
rtimer_clock_t wt;
|
||||
rtimer_clock_t now = RTIMER_NOW();
|
||||
|
||||
leds_on(LEDS_RED);
|
||||
NETSTACK_RADIO.transmit(transmit_len);
|
||||
leds_off(LEDS_RED);
|
||||
if(!is_broadcast) {
|
||||
on();
|
||||
}
|
||||
/* Turn off the radio for a while to let the other side
|
||||
respond. We don't need to keep our radio on when we know
|
||||
that the other side needs some time to produce a reply. */
|
||||
|
||||
wt = RTIMER_NOW();
|
||||
#if NURTIMER
|
||||
while(RTIMER_CLOCK_LT(wt, RTIMER_NOW(), wt + INTER_PACKET_INTERVAL));
|
||||
|
|
@ -699,46 +673,35 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
|||
len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
|
||||
if(len == ACK_LEN) {
|
||||
got_strobe_ack = 1;
|
||||
encounter_time = now;
|
||||
packet_indication_flag = 0;
|
||||
encounter_time = last_transmission_time;
|
||||
break;
|
||||
} else {
|
||||
PRINTF("contikimac: collisions while sending\n");
|
||||
packet_indication_flag = 0;
|
||||
collisions++;
|
||||
}
|
||||
} else {
|
||||
}
|
||||
last_transmission_time = now;
|
||||
first_transmission = 0;
|
||||
}
|
||||
}
|
||||
|
||||
#if WITH_ACK_OPTIMIZATION
|
||||
/* If we have received the strobe ACK, and we are sending a packet
|
||||
that will need an upper layer ACK (as signified by the
|
||||
PACKETBUF_ATTR_RELIABLE packet attribute), we keep the radio on. */
|
||||
if(got_strobe_ack && is_reliable) {
|
||||
on(); /* Wait for ACK packet */
|
||||
if(WITH_ACK_OPTIMIZATION) {
|
||||
/* If we have received the strobe ACK, and we are sending a packet
|
||||
that will need an upper layer ACK (as signified by the
|
||||
PACKETBUF_ATTR_RELIABLE packet attribute), we keep the radio on. */
|
||||
if(got_strobe_ack && is_reliable) {
|
||||
on(); /* Wait for ACK packet */
|
||||
} else {
|
||||
off();
|
||||
}
|
||||
} else {
|
||||
off();
|
||||
}
|
||||
#else /* WITH_ACK_OPTIMIZATION */
|
||||
off();
|
||||
#endif /* WITH_ACK_OPTIMIZATION */
|
||||
|
||||
#if WITH_PHASE_OPTIMIZATION
|
||||
#if WITH_ACK_OPTIMIZATION
|
||||
if(got_strobe_ack && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
|
||||
PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
|
||||
phase_register(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
|
||||
}
|
||||
#else /* WITH_ACK_OPTIMIZATION */
|
||||
if(got_strobe_ack && is_streaming == 0) {
|
||||
phase_register(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
|
||||
}
|
||||
#endif /* WITH_ACK_OPTIMIZATION */
|
||||
#endif /* WITH_PHASE_OPTIMIZATION */
|
||||
|
||||
PRINTF("contikimac: send (strobes=%u,len=%u,%s), done\n", strobes,
|
||||
packetbuf_totlen(), got_strobe_ack ? "ack" : "no ack");
|
||||
PRINTF("contikimac: send (strobes=%u, len=%u, %s, %s), done\n", strobes,
|
||||
packetbuf_totlen(),
|
||||
got_strobe_ack ? "ack" : "no ack",
|
||||
collisions ? "collision" : "no collision");
|
||||
|
||||
#if CONTIKIMAC_CONF_COMPOWER
|
||||
/* Accumulate the power consumption for the packet transmission. */
|
||||
|
|
@ -757,15 +720,37 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
|
|||
|
||||
we_are_sending = 0;
|
||||
|
||||
/* Determine the return value that we will return from the
|
||||
function. We must pass this value to the phase module before we
|
||||
return from the function. */
|
||||
if(collisions > 0) {
|
||||
return MAC_TX_COLLISION;
|
||||
ret = MAC_TX_COLLISION;
|
||||
}
|
||||
|
||||
if(!is_broadcast && !got_strobe_ack) {
|
||||
return MAC_TX_NOACK;
|
||||
ret = MAC_TX_NOACK;
|
||||
} else {
|
||||
return MAC_TX_OK;
|
||||
ret = MAC_TX_OK;
|
||||
}
|
||||
|
||||
#if WITH_PHASE_OPTIMIZATION
|
||||
if(!first_transmission) {
|
||||
if(WITH_ACK_OPTIMIZATION) {
|
||||
if(collisions == 0 && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
|
||||
PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
|
||||
phase_update(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time,
|
||||
ret);
|
||||
}
|
||||
} else {
|
||||
if(collisions == 0 && is_streaming == 0) {
|
||||
phase_update(&phase_list, packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time,
|
||||
ret);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif /* WITH_PHASE_OPTIMIZATION */
|
||||
|
||||
return ret;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
|
|
@ -784,8 +769,6 @@ input_packet(void)
|
|||
asleep. */
|
||||
off();
|
||||
|
||||
packet_indication_flag = 0;
|
||||
|
||||
if(packetbuf_totlen() > 0 && NETSTACK_FRAMER.parse()) {
|
||||
|
||||
if(packetbuf_datalen() > 0 &&
|
||||
|
|
@ -954,10 +937,6 @@ const struct rdc_driver contikimac_driver = {
|
|||
uint16_t
|
||||
contikimac_debug_print(void)
|
||||
{
|
||||
int i;
|
||||
for(i = 0; i < LATEST_CCA_CHECKS_NUM; ++i) {
|
||||
printf("%d: %d, %d\n", i, cca_checks[i].check[0], cca_checks[i].check[1]);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@
|
|||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* $Id: phase.c,v 1.3 2010/02/28 20:19:47 adamdunkels Exp $
|
||||
* $Id: phase.c,v 1.4 2010/03/14 22:59:23 adamdunkels Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
|
|
@ -54,15 +54,27 @@ struct phase_queueitem {
|
|||
struct queuebuf *q;
|
||||
};
|
||||
|
||||
#define PHASE_DEFER_THRESHOLD 4
|
||||
#define PHASE_QUEUESIZE 2
|
||||
#define PHASE_DEFER_THRESHOLD 2
|
||||
#define PHASE_QUEUESIZE 8
|
||||
|
||||
#define MAX_NOACKS 3
|
||||
|
||||
MEMB(phase_memb, struct phase_queueitem, PHASE_QUEUESIZE);
|
||||
|
||||
#define DEBUG 1
|
||||
#if DEBUG
|
||||
#include <stdio.h>
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#define PRINTDEBUG(...) printf(__VA_ARGS__)
|
||||
#else
|
||||
#define PRINTF(...)
|
||||
#define PRINTDEBUG(...)
|
||||
#endif
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
phase_register(const struct phase_list *list,
|
||||
const rimeaddr_t * neighbor, rtimer_clock_t time)
|
||||
phase_update(const struct phase_list *list,
|
||||
const rimeaddr_t * neighbor, rtimer_clock_t time,
|
||||
int mac_status)
|
||||
{
|
||||
struct phase *e;
|
||||
|
||||
|
|
@ -70,11 +82,31 @@ phase_register(const struct phase_list *list,
|
|||
for(e = list_head(*list->list); e != NULL; e = e->next) {
|
||||
if(rimeaddr_cmp(neighbor, &e->neighbor)) {
|
||||
e->time = time;
|
||||
|
||||
/* If the neighbor didn't reply to us, it may have switched
|
||||
phase (rebooted). We try a number of transmissions to it
|
||||
before we drop it from the phase list. */
|
||||
if(mac_status == MAC_TX_NOACK) {
|
||||
printf("phase noacks %d\n", e->noacks);
|
||||
e->noacks++;
|
||||
if(e->noacks >= MAX_NOACKS) {
|
||||
list_remove(*list->list, e);
|
||||
memb_free(&phase_memb, e);
|
||||
return;
|
||||
}
|
||||
} else if(mac_status == MAC_TX_OK) {
|
||||
e->noacks = 0;
|
||||
}
|
||||
|
||||
/* Make sure this entry is first on the list so subsequent
|
||||
searches are faster. */
|
||||
list_remove(*list->list, e);
|
||||
list_push(*list->list, e);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* No matching phase was found, so we allocate a new one. */
|
||||
if(e == NULL) {
|
||||
if(mac_status == MAC_TX_OK && e == NULL) {
|
||||
e = memb_alloc(list->memb);
|
||||
if(e == NULL) {
|
||||
/* We could not allocate memory for this phase, so we drop
|
||||
|
|
@ -83,6 +115,7 @@ phase_register(const struct phase_list *list,
|
|||
}
|
||||
rimeaddr_copy(&e->neighbor, neighbor);
|
||||
e->time = time;
|
||||
e->noacks = 0;
|
||||
list_push(*list->list, e);
|
||||
}
|
||||
}
|
||||
|
|
@ -92,13 +125,10 @@ send_packet(void *ptr)
|
|||
{
|
||||
struct phase_queueitem *p = ptr;
|
||||
|
||||
leds_on(LEDS_ALL);
|
||||
|
||||
queuebuf_to_packetbuf(p->q);
|
||||
queuebuf_free(p->q);
|
||||
memb_free(&phase_memb, p);
|
||||
NETSTACK_RDC.send(p->mac_callback, p->mac_callback_ptr);
|
||||
leds_off(LEDS_ALL);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
phase_status_t
|
||||
|
|
@ -159,9 +189,10 @@ phase_wait(struct phase_list *list,
|
|||
watchdog_periodic();
|
||||
}
|
||||
}
|
||||
return PHASE_SEND_NOW;
|
||||
}
|
||||
}
|
||||
return PHASE_SEND_NOW;
|
||||
return PHASE_UNKNOWN;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
|
|
|
|||
|
|
@ -28,7 +28,7 @@
|
|||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* $Id: phase.h,v 1.2 2010/02/28 20:19:47 adamdunkels Exp $
|
||||
* $Id: phase.h,v 1.3 2010/03/14 22:59:23 adamdunkels Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
|
|
@ -51,6 +51,7 @@ struct phase {
|
|||
struct phase *next;
|
||||
rimeaddr_t neighbor;
|
||||
rtimer_clock_t time;
|
||||
uint8_t noacks;
|
||||
};
|
||||
|
||||
struct phase_list {
|
||||
|
|
@ -59,6 +60,7 @@ struct phase_list {
|
|||
};
|
||||
|
||||
typedef enum {
|
||||
PHASE_UNKNOWN,
|
||||
PHASE_SEND_NOW,
|
||||
PHASE_DEFERRED,
|
||||
} phase_status_t;
|
||||
|
|
@ -72,8 +74,8 @@ void phase_init(struct phase_list *list);
|
|||
phase_status_t phase_wait(struct phase_list *list, const rimeaddr_t *neighbor,
|
||||
rtimer_clock_t cycle_time, rtimer_clock_t wait_before,
|
||||
mac_callback_t mac_callback, void *mac_callback_ptr);
|
||||
void phase_register(const struct phase_list *list, const rimeaddr_t * neighbor,
|
||||
rtimer_clock_t time);
|
||||
void phase_update(const struct phase_list *list, const rimeaddr_t * neighbor,
|
||||
rtimer_clock_t time, int mac_status);
|
||||
|
||||
|
||||
#endif /* PHASE_H */
|
||||
|
|
|
|||
Loading…
Reference in a new issue