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58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
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* maca_packet.h - defines a rxtx packet for the MACA driver
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* Copyright (C) 2013 Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#ifndef PACKET_H
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#define PACKET_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* does not include 2 byte FCS checksum */
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#ifndef MACA_MAX_PAYLOAD_SIZE
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#define MACA_MAX_PAYLOAD_SIZE 125
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#endif
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#define PACKET_STATS 0
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/**
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* @brief MC1322x internal MACA packet format */
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struct packet {
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uint8_t length; /**< does not include FCS checksum */
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volatile struct packet *left; /**< pointer to left neighbor in queue */
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volatile struct packet *right; /**< pointer to right neighbor in queue */
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uint8_t offset; /**< offset into data for first byte of the
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* packet payload
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* On TX this should be 0
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* On RX this should be 1 since the maca
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* puts the length as the first byte
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*/
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uint8_t lqi; /**< link quality indicator */
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uint8_t status; /**< packet status */
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uint32_t rx_time; /**< receiving timestamp */
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#if PACKET_STATS
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uint8_t seen;
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uint8_t post_tx;
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uint8_t get_free;
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uint8_t rxd;
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#endif
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uint8_t data[MACA_MAX_PAYLOAD_SIZE+2+1]; /**< +2 for FCS; + 1 since maca
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* returns the length as the
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* first byte */
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};
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typedef struct packet maca_packet_t;
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#ifdef __cplusplus
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}
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#endif
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#endif
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