RF230 Frame handling
[Wireless]

Data Structures
union	fcf_t
	Defines the bitfields of the frame control field (FCF). More...
struct	scf_t
	802.15.4 security control bitfield. More...
struct	aux_hdr_t
	802.15.4 Aux security header More...
union	ADDR_SIZE_SPEC_t
	A union of short and long address types. More...
struct	PAN_ID_ADDR_SPEC_t
	Structure containing a PAN ID and an address. More...
struct	ADDR_FIELD_SPEC_t
	Structure containing both source and destination addresses. More...
union	addr_t
	Union of both short and long addresses. More...
struct	frame_result_t
	Strucure used to return that status of the frame create process. More...
struct	frame_create_params_t
	Parameters used by the frame_tx_create() function. More...
Files
file	frame.c
	802.15.4 frame creation and parsing functions
file	frame.h
	802.15.4 frame creation and parsing functions
Defines
#define	FIXEDFRAMEOVERHEAD   (5)
	Some constants for frame length calculations.
Functions
void	frame_tx_create (frame_create_params_t *p, frame_result_t *frame_result)
	Creates a frame for transmission over the air.
void	rx_frame_parse (hal_rx_frame_t *rx_frame, parsed_frame_t *pf)
	Parses an input frame.

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Define Documentation

#define FIXEDFRAMEOVERHEAD   (5)

Some constants for frame length calculations.

The IEEE 802.15.4 frame has a number of constant/fixed fields that can be counted to make frame construction and max payload calculations easier.

These include: 1. FCF - 2 bytes - Fixed 2. Sequence number - 1 byte - Fixed 3. Addressing fields - 4 - 20 bytes - Variable 4. Aux security header - 0 - 14 bytes - Variable 5. CRC - 2 bytes - Fixed

Definition at line 124 of file frame.h.

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Function Documentation

void frame_tx_create	(	frame_create_params_t *	p,
		frame_result_t *	frame_result
	)

Creates a frame for transmission over the air.

This function is meant to be called by a higher level function, that interfaces to a MAC.

Parameters:

	p	Pointer to frame_create_params_t struct, which specifies the frame to send.
	frame_result	Pointer to frame_result_t struct, which will receive the results of this function, a pointer to the frame created, and the length of the frame.

Returns:

Nothing directly, though the frame_result structure will be filled in with a pointer to the frame and the frame length.

Referenced by sicslowmac_dataRequest().

void rx_frame_parse	(	hal_rx_frame_t *	rx_frame,
		parsed_frame_t *	pf
	)

Parses an input frame.

Scans the input frame to find each section, and stores the resulting addresses of each section in a parsed_frame_t structure.

Parameters:

	rx_frame	The input data from the radio chip.
	pf	The parsed_frame_t struct that stores a pointer to each section of the frame payload.