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96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
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* Copyright (C) 2015-17 Freie Universität Berlin
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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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/**
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* @defgroup drivers_slipdev SLIP network device
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* @ingroup drivers_netdev
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* @brief SLIP network device over @ref drivers_periph_uart
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* @see [RFC 1055](https://github.com/RIOT-OS/RIOT/pull/6487)
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* @{
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*
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* @file
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* @brief SLIP device definitions
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*
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* @author Martine Lenders <m.lenders@fu-berlin.de>
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*/
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#ifndef SLIPDEV_H
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#define SLIPDEV_H
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#include <stdint.h>
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#include "cib.h"
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#include "net/netdev.h"
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#include "periph/uart.h"
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#include "ringbuffer.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief UART buffer size used for TX and RX buffers
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*
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* Reduce this value if your expected traffic does not include full IPv6 MTU
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* sized packets
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*/
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#ifndef SLIPDEV_BUFSIZE
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#define SLIPDEV_BUFSIZE (1500U)
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#endif
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/**
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* @brief Packet FIFO size
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*
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* @note For GNRC it is recommended to have it the same size as the link-layer
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* thread's message queue, but it MUST be of power of 2
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*/
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#ifndef SLIPDEV_PKTFIFO_SIZE
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#define SLIPDEV_PKTFIFO_SIZE (8U)
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#endif
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/**
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* @brief Configuration parameters for a slipdev
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*/
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typedef struct {
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uart_t uart; /**< UART interface the device is connected to */
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uint32_t baudrate; /**< baudrate to use with slipdev_params_t::uart */
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} slipdev_params_t;
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/**
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* @brief Device descriptor for slipdev
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*
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* @extends netdev_t
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*/
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typedef struct {
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netdev_t netdev; /**< parent class */
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slipdev_params_t config; /**< configuration parameters */
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ringbuffer_t inbuf; /**< RX buffer */
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char rxmem[SLIPDEV_BUFSIZE]; /**< memory used by RX buffer */
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uint16_t pktfifo[SLIPDEV_PKTFIFO_SIZE]; /**< FIFO of sizes of fully received
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* packets */
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cib_t pktfifo_idx; /**< CIB for slipdev_t::pktfifo */
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uint16_t inbytes; /**< the number of bytes received of
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* a currently incoming packet */
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uint16_t inesc; /**< device previously received an escape
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* byte */
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} slipdev_t;
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/**
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* @brief Setup a slipdev device state
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*
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* @param[in] dev device descriptor
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* @param[in] params parameters for device initialization
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*/
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void slipdev_setup(slipdev_t *dev, const slipdev_params_t *params);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SLIPDEV_H */
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/** @} */
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