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
This commit is contained in:
adamdunkels
parent
b4b7e942b6
commit
9c58768b59
1 changed files with 66 additions and 39 deletions
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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 1.16 2010/03/19 13:24:58 adamdunkels Exp $
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* $Id: contikimac.c,v 1.17 2010/03/29 21:51:36 adamdunkels Exp $
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*/
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/**
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@ -51,6 +51,7 @@
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#include "sys/pt.h"
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#include "sys/rtimer.h"
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#include "cooja-debug.h"
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#include "contiki-conf.h"
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#ifdef EXPERIMENT_SETUP
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@ -92,7 +93,6 @@ struct announcement_msg {
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"num" field in the struct. */
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#define ANNOUNCEMENT_MSG_HEADERLEN (sizeof(uint16_t) * 2)
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#ifdef CONTIKIMAC_CONF_CYCLE_TIME
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#define CYCLE_TIME (CONTIKIMAC_CONF_CYCLE_TIME)
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#else
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@ -103,11 +103,13 @@ struct announcement_msg {
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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
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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 STREAM_CCA_COUNT (CYCLE_TIME / (CCA_SLEEP_TIME + CCA_CHECK_TIME) - CCA_COUNT_MAX)
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#define GUARD_TIME 3 * CHECK_TIME
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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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@ -116,7 +118,11 @@ struct announcement_msg {
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#define SHORTEST_PACKET_SIZE 18
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/* The cycle time for announcements. */
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#define ANNOUNCEMENT_PERIOD 4 * CLOCK_SECOND
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#ifdef ANNOUNCEMENT_CONF_PERIOD
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#define ANNOUNCEMENT_PERIOD ANNOUNCEMENT_CONF_PERIOD
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#else /* ANNOUNCEMENT_CONF_PERIOD */
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#define ANNOUNCEMENT_PERIOD 1 * CLOCK_SECOND
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#endif /* ANNOUNCEMENT_CONF_PERIOD */
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/* The time before sending an announcement within one announcement
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cycle. */
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@ -124,7 +130,7 @@ struct announcement_msg {
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#define STROBE_WAIT_TIME (RTIMER_ARCH_SECOND / 600)
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#define STROBE_TIME (CYCLE_TIME + 8 * CHECK_TIME)
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#define STROBE_TIME (CYCLE_TIME + 2 * CHECK_TIME)
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#define ACK_LEN 3
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@ -202,6 +208,7 @@ off(void)
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}
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}
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/*---------------------------------------------------------------------------*/
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static rtimer_clock_t cycle_start;
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static char powercycle(struct rtimer *t, void *ptr);
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static void
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schedule_powercycle(struct rtimer *t, rtimer_clock_t time)
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@ -267,7 +274,7 @@ 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 rtimer_clock_t t0;
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static uint8_t count;
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cycle_start = RTIMER_NOW();
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@ -279,7 +286,7 @@ powercycle(struct rtimer *t, void *ptr)
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t0 = RTIMER_NOW();
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if(we_are_sending == 0) {
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powercycle_turn_radio_on();
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#if 0
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#if 1
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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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#else
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@ -337,7 +344,7 @@ powercycle(struct rtimer *t, void *ptr)
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leds_off(LEDS_RED);
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break;
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}
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if(periods > 20 && !(NETSTACK_RADIO.receiving_packet() ||
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if(periods > 10 && !(NETSTACK_RADIO.receiving_packet() ||
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NETSTACK_RADIO.pending_packet())) {
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leds_on(LEDS_GREEN);
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powercycle_turn_radio_off();
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@ -375,7 +382,9 @@ powercycle(struct rtimer *t, void *ptr)
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RTIMER_NOW() - cycle_start < CYCLE_TIME - CCA_CHECK_TIME * CCA_COUNT_MAX);
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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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schedule_powercycle(t, CYCLE_TIME - (RTIMER_NOW() - cycle_start) + 1);
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/* printf("cycle_start 0x%02x now 0x%02x wait 0x%02x\n",
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cycle_start, RTIMER_NOW(), CYCLE_TIME - (RTIMER_NOW() - cycle_start));*/
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PT_YIELD(&pt);
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}
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}
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@ -428,7 +437,8 @@ format_announcement(char *hdr)
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adata.announcement_magic[1] = ANNOUNCEMENT_MAGIC2;
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adata.num = 0;
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for(a = announcement_list();
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a != NULL && adata.num < ANNOUNCEMENT_MAX; a = a->next) {
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a != NULL && a->has_value && adata.num < ANNOUNCEMENT_MAX;
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a = a->next) {
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adata.data[adata.num].id = a->id;
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adata.data[adata.num].value = a->value;
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adata.num++;
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@ -454,7 +464,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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uint8_t first_transmission = 1;
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int strobes;
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uint8_t got_strobe_ack = 0;
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int len;
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int hdrlen, len;
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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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@ -468,6 +478,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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return MAC_TX_ERR_FATAL;
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}
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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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@ -508,6 +519,30 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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}
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}
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/* Create the MAC header for the data packet. */
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hdrlen = NETSTACK_FRAMER.create();
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if(hdrlen == 0) {
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/* Failed to send */
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PRINTF("contikimac: send failed, too large header\n");
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return MAC_TX_ERR_FATAL;
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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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packetbuf_compact();
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NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
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transmit_len = packetbuf_totlen();
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/* Remove the MAC-layer header since it will be recreated next time around. */
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packetbuf_hdr_remove(hdrlen);
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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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@ -516,7 +551,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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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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CYCLE_TIME, GUARD_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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@ -527,7 +562,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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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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CYCLE_TIME, GUARD_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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@ -539,25 +574,6 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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#endif /* WITH_PHASE_OPTIMIZATION */
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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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/* 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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PRINTF("contikimac: send failed, too large header\n");
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return MAC_TX_ERR_FATAL;
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}
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packetbuf_compact();
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NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
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transmit_len = packetbuf_totlen();
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/* By setting we_are_sending to one, we ensure that the rtimer
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@ -639,9 +655,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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watchdog_periodic();
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/* if(is_known_receiver && strobes > MAX_PHASE_STROBES) {
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if(is_known_receiver && strobes > MAX_PHASE_STROBES) {
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break;
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}*/
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}
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len = 0;
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@ -674,6 +690,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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#endif
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len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
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if(len == ACK_LEN) {
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leds_on(LEDS_BLUE);
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got_strobe_ack = 1;
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encounter_time = last_transmission_time;
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break;
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@ -737,6 +754,9 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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#if WITH_PHASE_OPTIMIZATION
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if(!first_transmission) {
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/* COOJA_DEBUG_PRINTF("first phase 0x%02x\n", encounter_time % CYCLE_TIME);*/
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if(WITH_ACK_OPTIMIZATION) {
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if(collisions == 0 && packetbuf_attr(PACKETBUF_ATTR_PACKET_TYPE) !=
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PACKETBUF_ATTR_PACKET_TYPE_ACK && is_streaming == 0) {
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@ -752,6 +772,7 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr)
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}
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#endif /* WITH_PHASE_OPTIMIZATION */
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leds_off(LEDS_BLUE);
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return ret;
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}
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/*---------------------------------------------------------------------------*/
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@ -771,6 +792,8 @@ input_packet(void)
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asleep. */
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off();
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/* printf("cycle_start 0x%02x 0x%02x\n", cycle_start, cycle_start % CYCLE_TIME);*/
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if(packetbuf_totlen() > 0 && NETSTACK_FRAMER.parse()) {
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@ -832,9 +855,6 @@ send_announcement(void *ptr)
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announcement_len = format_announcement(packetbuf_dataptr());
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if(announcement_len > 0) {
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if(announcement_len < SHORTEST_PACKET_SIZE) {
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announcement_len = SHORTEST_PACKET_SIZE;
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}
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packetbuf_set_datalen(announcement_len);
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packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
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@ -846,6 +866,13 @@ send_announcement(void *ptr)
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int i, collisions;
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we_are_sending = 1;
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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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collisions = 0;
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/* Check for collisions */
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for(i = 0; i < CCA_COUNT_MAX; ++i) {
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