Building and parsing Paparazzi frames. More...

#include <inttypes.h>
#include "subsystems/datalink/downlink.h"
#include "subsystems/datalink/pprz_transport.h"

Include dependency graph for pprz_transport.c:

Functions
static void	put_1byte (struct pprz_transport trans, struct link_device dev, const uint8_t byte)

static void	put_bytes (struct pprz_transport trans, struct link_device dev, enum TransportDataType type, enum TransportDataFormat format, uint8_t len, const void *bytes)

static void	put_named_byte (struct pprz_transport trans, struct link_device dev, enum TransportDataType type, enum TransportDataFormat format, uint8_t byte, const char *name)

static uint8_t	size_of (struct pprz_transport *trans, uint8_t len)

static void	start_message (struct pprz_transport trans, struct link_device dev, uint8_t payload_len)

static void	end_message (struct pprz_transport trans, struct link_device dev)

static void	overrun (struct pprz_transport trans, struct link_device dev)

static void	count_bytes (struct pprz_transport trans, struct link_device dev, uint8_t bytes)

static int	check_available_space (struct pprz_transport trans, struct link_device dev, uint8_t bytes)

void	pprz_transport_init (struct pprz_transport *t)

Variables
struct pprz_transport	pprz_tp

Detailed Description

Building and parsing Paparazzi frames.

Pprz frame:

where checksum is computed over length and payload:

ck_A = ck_B = length
for each byte b in payload
    ck_A += b;
    ck_b += ck_A;

Definition in file pprz_transport.c.

Function Documentation

static int check_available_space	(	struct pprz_transport *	trans,
		struct link_device *	dev,
		uint8_t	bytes
	)

static

Definition at line 111 of file pprz_transport.c.

References link_device::check_free_space, and link_device::periph.

Referenced by pprz_transport_init().

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static void count_bytes	(	struct pprz_transport *	trans,
		struct link_device *	dev,
		uint8_t	bytes
	)

static

Definition at line 105 of file pprz_transport.c.

References link_device::nb_bytes.

Referenced by pprz_transport_init().

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static void end_message	(	struct pprz_transport *	trans,
		struct link_device *	dev
	)

static

Definition at line 92 of file pprz_transport.c.

References pprz_transport::ck_a_tx, pprz_transport::ck_b_tx, link_device::periph, link_device::put_byte, and link_device::send_message.

Referenced by pprz_transport_init().

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static void overrun	(	struct pprz_transport *	trans,
		struct link_device *	dev
	)

static

Definition at line 99 of file pprz_transport.c.

References link_device::nb_ovrn.

Referenced by pprz_transport_init().

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void pprz_transport_init ( struct pprz_transport * t )

Definition at line 117 of file pprz_transport.c.

References transport_tx::check_available_space, check_available_space(), transport_tx::count_bytes, count_bytes(), end_message(), transport_tx::end_message, FALSE, transport_tx::impl, transport_rx::msg_received, transport_tx::overrun, overrun(), put_bytes(), transport_tx::put_bytes, put_named_byte(), transport_tx::put_named_byte, size_of(), transport_tx::size_of, start_message(), transport_tx::start_message, pprz_transport::status, pprz_transport::trans_rx, pprz_transport::trans_tx, and UNINIT.

Referenced by downlink_init(), extra_pprz_dl_init(), and intermcu_init().

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static void put_1byte	(	struct pprz_transport *	trans,
		struct link_device *	dev,
		const uint8_t	byte
	)

static

Definition at line 51 of file pprz_transport.c.

References pprz_transport::ck_a_tx, pprz_transport::ck_b_tx, link_device::periph, and link_device::put_byte.

Referenced by put_bytes(), and put_named_byte().

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static void put_bytes	(	struct pprz_transport *	trans,
		struct link_device *	dev,
		enum TransportDataType	type,
		enum TransportDataFormat	format,
		uint8_t	len,
		const void *	bytes
	)

static

Definition at line 58 of file pprz_transport.c.

References put_1byte().

Referenced by pprz_transport_init().

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static void put_named_byte	(	struct pprz_transport *	trans,
		struct link_device *	dev,
		enum TransportDataType	type,
		enum TransportDataFormat	format,
		uint8_t	byte,
		const char *	name
	)