/* * Copyright (c) 2015, SICS Swedish ICT. * 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. * */ /** * \addtogroup tsch * @{ * \file * TSCH constants * \author * Simon Duquennoy */ #ifndef __TSCH_CONST_H__ #define __TSCH_CONST_H__ /********** Includes **********/ #include "net/packetbuf.h" #include "net/mac/tsch/tsch-conf.h" /* Required for timestlot timing consts */ /********** Constants **********/ /* Link options */ #define LINK_OPTION_TX 1 #define LINK_OPTION_RX 2 #define LINK_OPTION_SHARED 4 #define LINK_OPTION_TIME_KEEPING 8 #define LINK_OPTION_BURST 16 /* Default IEEE 802.15.4e hopping sequences, obtained from https://gist.github.com/twatteyne/2e22ee3c1a802b685695 */ /* 16 channels, sequence length 16 */ #define TSCH_HOPPING_SEQUENCE_16_16 (uint8_t[]){ 16, 17, 23, 18, 26, 15, 25, 22, 19, 11, 12, 13, 24, 14, 20, 21 } /* 4 channels, sequence length 16 */ #define TSCH_HOPPING_SEQUENCE_4_16 (uint8_t[]){ 20, 26, 25, 26, 15, 15, 25, 20, 26, 15, 26, 25, 20, 15, 20, 25 } /* 4 channels, sequence length 4 */ #define TSCH_HOPPING_SEQUENCE_4_4 (uint8_t[]){ 15, 25, 26, 20 } /* 2 channels, sequence length 2 */ #define TSCH_HOPPING_SEQUENCE_2_2 (uint8_t[]){ 20, 25 } /* 1 channel, sequence length 1 */ #define TSCH_HOPPING_SEQUENCE_1_1 (uint8_t[]){ 20 } /* Max TSCH packet lenght */ #define TSCH_PACKET_MAX_LEN MIN(127, PACKETBUF_SIZE) /* The jitter to remove in ticks. * This should be the sum of measurement errors on Tx and Rx nodes. * */ #define TSCH_TIMESYNC_MEASUREMENT_ERROR US_TO_RTIMERTICKS(32) /* The approximate number of slots per second */ #define TSCH_SLOTS_PER_SECOND (1000000 / TSCH_DEFAULT_TS_TIMESLOT_LENGTH) /* Calculate packet tx/rx duration in rtimer ticks based on sent * packet len in bytes with 802.15.4 250kbps data rate. * One byte = 32us. Add two bytes for CRC and one for len field */ #define TSCH_PACKET_DURATION(len) US_TO_RTIMERTICKS(32 * ((len) + 3)) /* Convert rtimer ticks to clock and vice versa */ #define TSCH_CLOCK_TO_TICKS(c) (((c) * RTIMER_SECOND) / CLOCK_SECOND) #define TSCH_CLOCK_TO_SLOTS(c, timeslot_length) (TSCH_CLOCK_TO_TICKS(c) / timeslot_length) /* The default timeslot timing in the standard is a guard time of * 2200 us, a Tx offset of 2120 us and a Rx offset of 1120 us. * As a result, the listening device has a guard time not centered * on the expected Tx time. This is to be fixed in the next iteration * of the standard. This can be enabled with: * #define TSCH_DEFAULT_TS_TX_OFFSET 2120 * #define TSCH_DEFAULT_TS_RX_OFFSET 1120 * #define TSCH_DEFAULT_TS_RX_WAIT 2200 * * Instead, we align the Rx guard time on expected Tx time. The Rx * guard time is user-configurable with TSCH_CONF_RX_WAIT. * (TS_TX_OFFSET - (TS_RX_WAIT / 2)) instead */ #if TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 10000 /* Default timeslot timing as per IEEE 802.15.4e */ #define TSCH_DEFAULT_TS_CCA_OFFSET 1800 #define TSCH_DEFAULT_TS_CCA 128 #define TSCH_DEFAULT_TS_TX_OFFSET 2120 #define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2)) #define TSCH_DEFAULT_TS_RX_ACK_DELAY 800 #define TSCH_DEFAULT_TS_TX_ACK_DELAY 1000 #define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT #define TSCH_DEFAULT_TS_ACK_WAIT 400 #define TSCH_DEFAULT_TS_RX_TX 192 #define TSCH_DEFAULT_TS_MAX_ACK 2400 #define TSCH_DEFAULT_TS_MAX_TX 4256 #define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 10000 #elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 15000 /* Default timeslot timing for platforms requiring 15ms slots */ #define TSCH_DEFAULT_TS_CCA_OFFSET 1800 #define TSCH_DEFAULT_TS_CCA 128 #define TSCH_DEFAULT_TS_TX_OFFSET 4000 #define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2)) #define TSCH_DEFAULT_TS_RX_ACK_DELAY 3600 #define TSCH_DEFAULT_TS_TX_ACK_DELAY 4000 #define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT #define TSCH_DEFAULT_TS_ACK_WAIT 800 #define TSCH_DEFAULT_TS_RX_TX 2072 #define TSCH_DEFAULT_TS_MAX_ACK 2400 #define TSCH_DEFAULT_TS_MAX_TX 4256 #define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 15000 #elif TSCH_CONF_DEFAULT_TIMESLOT_LENGTH == 65000U /* 65ms timeslot, i.e. nearly the max length allowed by standard (16-bit unsigned in micro-seconds). * Useful for running link-layer security on sky in Cooja, where only S/W security is supported. * Note: this slot timing would require a total of 120ms. If a slot overlaps with the next active slot, * the latter will be skipped. * This configuration is mostly a work-around to test link-layer security in Cooja, it is recommended * to use it with a 6TiSCH minimal schedule of length >= 2. */ #define TSCH_DEFAULT_TS_CCA_OFFSET 1800 #define TSCH_DEFAULT_TS_CCA 128 #define TSCH_DEFAULT_TS_TX_OFFSET 52000 #define TSCH_DEFAULT_TS_RX_OFFSET (TSCH_DEFAULT_TS_TX_OFFSET - (TSCH_CONF_RX_WAIT / 2)) #define TSCH_DEFAULT_TS_RX_ACK_DELAY 58600 #define TSCH_DEFAULT_TS_TX_ACK_DELAY 59000 #define TSCH_DEFAULT_TS_RX_WAIT TSCH_CONF_RX_WAIT #define TSCH_DEFAULT_TS_ACK_WAIT 800 #define TSCH_DEFAULT_TS_RX_TX 2072 #define TSCH_DEFAULT_TS_MAX_ACK 2400 #define TSCH_DEFAULT_TS_MAX_TX 4256 #define TSCH_DEFAULT_TS_TIMESLOT_LENGTH 65000 #else #error "TSCH: Unsupported default timeslot length" #endif #endif /* __TSCH_CONST_H__ */ /** @} */