Implementation of the Ekinox binary communication protocol.
You can access low-level communication with the device.
Copyright 2007-20011 SBG Systems. All rights reserved. More...

#include <sbgCommon.h>
#include <interfaces/sbgInterface.h>
#include <streamBuffer/sbgStreamBuffer.h>

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Classes
struct	_SbgEComProtocol

Macros
#define	SBG_ECOM_ETX (0x33)

#define	SBG_ECOM_MAX_BUFFER_SIZE (4096)

#define	SBG_ECOM_MAX_PAYLOAD_SIZE (4086)

#define	SBG_ECOM_RX_TIME_OUT (450)

#define	SBG_ECOM_SYNC_1 (0xFF)

#define	SBG_ECOM_SYNC_2 (0x5A)

Typedefs
typedef struct _SbgEComProtocol	SbgEComProtocol

Functions
SbgErrorCode	sbgEComFinalizeFrameGeneration (SbgStreamBuffer *pOutputStream, size_t streamCursor)

SbgErrorCode	sbgEComProtocolClose (SbgEComProtocol *pHandle)

SbgErrorCode	sbgEComProtocolInit (SbgEComProtocol pHandle, SbgInterface pInterface)

SbgErrorCode	sbgEComProtocolReceive (SbgEComProtocol pHandle, uint8_t pMsgClass, uint8_t pMsg, void pData, size_t *pSize, size_t maxSize)

SbgErrorCode	sbgEComProtocolSend (SbgEComProtocol pHandle, uint8_t msgClass, uint8_t msg, const void pData, size_t size)

SbgErrorCode	sbgEComStartFrameGeneration (SbgStreamBuffer pOutputStream, uint8_t msgClass, uint8_t msg, size_t pStreamCursor)

Detailed Description

Implementation of the Ekinox binary communication protocol.
You can access low-level communication with the device.
Copyright 2007-20011 SBG Systems. All rights reserved.

Author: SBG-Systems (Raphael Siryani)

Date: 06/02/13

You will find below, the frame definition used by Ekinox devices.

Frame structure
Fields	SYNC 1	SYNC 2	CMD	LEN	DATA	CRC	ETX
Size in bytes	1	1	2	2	(0-4086)	2	1
Value	0xFF	0x5A	?	?	?	?	0x33

Size in bytes indicates the size of the data field.
The minimum frame size is 9 bytes and the maximum is 512 bytes.

The CRC is calculated on the whole frame without:
SYNC STX CRC and ETX fields.

Definition in file sbgEComProtocol.h.

Macro Definition Documentation

#define SBG_ECOM_ETX (0x33)

End of frame byte.

Definition at line 39 of file sbgEComProtocol.h.

#define SBG_ECOM_MAX_BUFFER_SIZE (4096)

Maximum reception buffer size in bytes.

Definition at line 35 of file sbgEComProtocol.h.

#define SBG_ECOM_MAX_PAYLOAD_SIZE (4086)

Maximum payload size in bytes.

Definition at line 36 of file sbgEComProtocol.h.

#define SBG_ECOM_RX_TIME_OUT (450)

Default time out for new frame reception.

Definition at line 41 of file sbgEComProtocol.h.

#define SBG_ECOM_SYNC_1 (0xFF)

First synchronization char of the frame.

Definition at line 37 of file sbgEComProtocol.h.

#define SBG_ECOM_SYNC_2 (0x5A)

Second synchronization char of the frame.

Definition at line 38 of file sbgEComProtocol.h.

Typedef Documentation

typedef struct _SbgEComProtocol SbgEComProtocol

Struct containing all protocol related data.

Function Documentation

SbgErrorCode sbgEComFinalizeFrameGeneration	(	SbgStreamBuffer *	pOutputStream,
		size_t	streamCursor
	)

Finalize an output stream that has been initialized with sbgEComStartFrameGeneration. At return, the output stream buffer should point at the end of the generated message. You can thus easily create consecutive SBG_ECOM_LOGS with these methods.

Parameters

[in]	pOutputStream	Pointer to an allocated and initialized output stream.
[in]	streamCursor	Position in the stream buffer of the generated message first byte. This value is returned by sbgEComStartFrameGeneration and is mandatory for correct operations.

Returns: SBG_NO_ERROR in case of good operation.

Definition at line 499 of file sbgEComProtocol.c.

SbgErrorCode sbgEComProtocolClose ( SbgEComProtocol * pHandle )

Close the protocol system.

Parameters

[in] pHandle A valid protocol handle to close.

Returns: SBG_NO_ERROR if we have closed and released the protocol system.

Definition at line 35 of file sbgEComProtocol.c.

SbgErrorCode sbgEComProtocolInit	(	SbgEComProtocol *	pHandle,
		SbgInterface *	pInterface
	)

Initialize the protocol system used to communicate with the product and return the created handle.

Parameters

[in]	pHandle	Pointer on an allocated protocol structure to initialize.
[in]	pInterface	Interface to use for read/write operations.

Returns: SBG_NO_ERROR if we have initialised the protocol system.

Definition at line 14 of file sbgEComProtocol.c.

SbgErrorCode sbgEComProtocolReceive	(	SbgEComProtocol *	pHandle,
		uint8_t *	pMsgClass,
		uint8_t *	pMsg,
		void *	pData,
		size_t *	pSize,
		size_t	maxSize
	)

Try to receive a frame from the device and returns the cmd, data and size of data field.

Parameters

[in]	pHandle	A valid protocol handle.
[out]	pMsgClass	Pointer to hold the returned message class
[out]	pMsg	Pointer to hold the returned message id
[out]	pData	Allocated buffer used to hold received data field.
[out]	pSize	Pointer used to hold the received data field size.
[in]	maxSize	Max number of bytes that can be stored in the pData buffer.

Returns: SBG_NO_ERROR if we have received a valid frame.
SBG_NOT_READY if we haven't received a valid frame or if the serial buffer is empty.
SBG_INVALID_CRC if the received frame has an invalid CRC.
SBG_NULL_POINTER if an input parameter is NULL.
SBG_BUFFER_OVERFLOW if the received frame payload couldn't fit into the pData buffer.

Definition at line 143 of file sbgEComProtocol.c.

SbgErrorCode sbgEComProtocolSend	(	SbgEComProtocol *	pHandle,
		uint8_t	msgClass,
		uint8_t	msg,
		const void *	pData,
		size_t	size
	)

Send a frame to the device (size should be less than 4086 bytes).

Parameters

[in]	pHandle	A valid protocol handle.
[in]	msgClass	Message class (0-255)
[in]	msg	Message id (0-255)
[in]	pData	Pointer on the data payload to send or NULL if no payload.
[in]	size	Size in bytes of the data payload (less than 4086).

Returns: SBG_NO_ERROR if the frame has been sent.

Definition at line 60 of file sbgEComProtocol.c.

SbgErrorCode sbgEComStartFrameGeneration	(	SbgStreamBuffer *	pOutputStream,
		uint8_t	msgClass,
		uint8_t	msg,
		size_t *	pStreamCursor
	)

Initialize an output stream for an sbgECom frame generation. This method is helpful to avoid memory copy compared to sbgEComProtocolSend one.

Parameters

[in]	pOutputStream	Pointer to an allocated and initialized output stream.
[in]	msgClass	Message class (0-255)
[in]	msg	Message id (0-255)
[out]	pStreamCursor	The initial output stream cursor that thus points to the begining of the generated message. This value should be passed to sbgEComFinalizeFrameGeneration for correct operations.

Returns: SBG_NO_ERROR in case of good operation.

Definition at line 461 of file sbgEComProtocol.c.

Classes

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation