File content as of revision 0:3b093bd0819e:

/**
  ******************************************************************************
  * @file    lib_NDEF_Geo.c
  * @author  MMY Application Team
  * @version V1.0.0
  * @date    20-November-2013
  * @brief   This file help to manage NDEF file that represent geolocation.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
  *
  * Licensed under MMY-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "lib_NDEF_Geo.h"

/** @addtogroup NFC_libraries
 * 	@{
 *	@brief  <b>This is the library used to manage the content of the TAG (data)
 *          But also the specific feature of the tag, for instance
 *          password, gpo... </b>
 */


/** @addtogroup libNFC_FORUM
  * @{
	*	@brief  This part of the library manage data which follow NFC forum organisation.
  */

/**
 * @brief  This buffer contains the data send/received by TAG
 */
extern uint8_t NDEF_Buffer [NDEF_MAX_SIZE];

/** @defgroup libGeo_Private_Functions
  * @{
  */

static void NDEF_FillGeoStruct( uint8_t* pPayload, uint32_t PayloadSize, sGeoInfo *pGeoStruct);
static void NDEF_ReadURI_Geo ( sRecordInfo *pRecordStruct, sGeoInfo *pGeoStruct );

/**
  * @brief  This fonction fill Geo structure with information of NDEF message
	* @param	pPayload : pointer on the payload data of the NDEF message
	* @param	PayloadSize : number of data in the payload
	* @param	pGeoStruct : pointer on the structure to fill
  * @retval NONE 
  */
static void NDEF_FillGeoStruct( uint8_t* pPayload, uint32_t PayloadSize, sGeoInfo *pGeoStruct)
{
	uint8_t* pLastByteAdd, *pLook4Word, *pEndString ;
	char* pKeyWord;
	uint32_t SizeOfKeyWord;
	
	pKeyWord = GEO_TYPE_STRING;
	SizeOfKeyWord = GEO_TYPE_STRING_LENGTH;
	
	/* First charactere force to NULL in case not matching found */
	*pGeoStruct->Latitude = 0;
	*pGeoStruct->Longitude = 0;
	
	/* Interresting information are stored before picture if any */
	/* Moreover picture is not used in this demonstration SW */	
	pLastByteAdd = (uint8_t*)(pPayload + PayloadSize);
  
	pLook4Word = pPayload;
	while( memcmp( pLook4Word, pKeyWord, SizeOfKeyWord) && pLook4Word<pLastByteAdd )
	{
		pLook4Word++;
	}
	
	pEndString = pLook4Word;
  
	/* Retrieve phone number */
	if( pLook4Word != pLastByteAdd)
	{	
		pLook4Word += SizeOfKeyWord;
		while( memcmp( pEndString, URI_LATITUDE_END, URI_LATITUDE_END_LENGTH) && pEndString<pLastByteAdd )
		{
			pEndString++;
		}
		if( pEndString != pLastByteAdd)
		{
			memcpy( pGeoStruct->Latitude, pLook4Word, pEndString-pLook4Word);
			/* add end of string charactere */
			pGeoStruct->Latitude[pEndString-pLook4Word] = 0;	
		}
	}	
	pEndString += URI_LATITUDE_END_LENGTH;
	pLook4Word = pEndString;
	
	memcpy( pGeoStruct->Longitude, pEndString, PayloadSize-(pEndString-pPayload));
	/* add end of string charactere */
	pGeoStruct->Longitude[PayloadSize-(pEndString-pPayload)] = 0;		
	
}

/**
  * @brief  This fonction read the geoloccation information and store data in a structure
	* @param	pRecordStruct : Pointer on the record structure
	* @param	pGeoStruct : pointer on the structure to fill
  * @retval NONE 
  */
static void NDEF_ReadURI_Geo ( sRecordInfo *pRecordStruct, sGeoInfo *pGeoStruct )
{
	uint8_t* pPayload;
	uint32_t PayloadSize;
	
	PayloadSize = ((uint32_t)(pRecordStruct->PayloadLength3)<<24) | ((uint32_t)(pRecordStruct->PayloadLength2)<<16) |
    ((uint32_t)(pRecordStruct->PayloadLength1)<<8)  | pRecordStruct->PayloadLength0;
	
	/* Read record header */
	pPayload = (uint8_t*)(pRecordStruct->PayloadBufferAdd);
	
	if( pRecordStruct->NDEF_Type == URI_GEO_TYPE)
		NDEF_FillGeoStruct(pPayload , PayloadSize, pGeoStruct);
  
}

/**
  * @}
  */

/** @defgroup libGeo_Public_Functions
  * @{
  *	@brief  This file is used to manage geolocation (stored or loaded in tag)
  */ 

/**
  * @brief  This fonction read NDEF and retrieve Geo information if any
	* @param	pRecordStruct : Pointer on the record structure
	* @param	pGeoStruct : pointer on the structure to fill 
  * @retval SUCCESS : Geolocation information from NDEF have been retrieved
	* @retval ERROR : Not able to retrieve geolocation information
  */
uint16_t NDEF_ReadGeo(sRecordInfo *pRecordStruct, sGeoInfo *pGeoStruct)
{
	uint16_t status = ERROR;
	uint16_t FileId=0;
	sRecordInfo *pSPRecordStruct;	
	uint32_t PayloadSize, RecordPosition;
	uint8_t* pData;
  
	if( pRecordStruct->NDEF_Type == URI_GEO_TYPE )
	{	
		NDEF_ReadURI_Geo(pRecordStruct, pGeoStruct );
		status = SUCCESS;
	}
	else if( pRecordStruct->NDEF_Type == SMARTPOSTER_TYPE)
	{
		for (RecordPosition = 0; RecordPosition<pRecordStruct->NbOfRecordInSPPayload; RecordPosition++)
		{
			pSPRecordStruct = (sRecordInfo *)(pRecordStruct->SPRecordStructAdd[RecordPosition]);
			if(pSPRecordStruct->NDEF_Type == URI_GEO_TYPE )
			{
				NDEF_ReadURI_Geo(pSPRecordStruct, pGeoStruct );
				status = SUCCESS;
			}
			if(pSPRecordStruct->NDEF_Type == TEXT_TYPE )
			{
				PayloadSize = ((uint32_t)(pSPRecordStruct->PayloadLength3)<<24) | ((uint32_t)(pSPRecordStruct->PayloadLength2)<<16) |
          ((uint32_t)(pSPRecordStruct->PayloadLength1)<<8)  | pSPRecordStruct->PayloadLength0;
				
				/* The instruction content the UTF-8 language code that is not used here */
				pData = (uint8_t*)pSPRecordStruct->PayloadBufferAdd;
				PayloadSize -= *pData+1; /* remove not usefull data */
				pData += *pData+1; /* set pointer on usefull data */
        
				memcpy(pGeoStruct->Information, pData, PayloadSize);
				/* add end of string charactere */
				pGeoStruct->Information[PayloadSize] = 0;		
			}
		}
	}
	
	CloseNDEFSession(FileId);
	
	return status;
}

/**
  * @brief  This fonction write the NDEF file with the geolocation data given in the structure
	* @param	pGeoStruct : pointer on structure that contain the geolocation information
  * @retval SUCCESS : the function is succesful
	* @retval ERROR : Not able to store NDEF file inside tag.
  */
uint16_t NDEF_WriteGeo ( sGeoInfo *pGeoStruct )
{
	uint16_t status = ERROR;
	uint32_t geoSize, infoSize, totalSize, Offset = 0;
	
	/* GEO is an URI but can be included in a smart poster to add text to give instruction to user for instance */
	
	/* GEO (smart poster) Record Header */
  /************************************/	
  /*	7 |  6 |  5 |  4 |  3 | 2  1  0 */
  /*----------------------------------*/	
  /* MB   ME   CF   SR   IL    TNF    */  /* <---- CF=0, IL=0 and SR=1 TNF=1 NFC Forum Well-known type*/
  /*----------------------------------*/	
  /*					TYPE LENGTH 						*/
  /*----------------------------------*/
  /*				PAYLOAD LENGTH 3 					*/	/* <---- Used only if SR=0 */
  /*----------------------------------*/
  /*			  PAYLOAD LENGTH 2 					*/  /* <---- Used only if SR=0 */
  /*----------------------------------*/
  /*				PAYLOAD LENGTH 1 					*/  /* <---- Used only if SR=0 */
  /*----------------------------------*/	
  /*				PAYLOAD LENGTH 0 					*/  
  /*----------------------------------*/
  /*					ID LENGTH 							*/  /* <---- Not Used  */
  /*----------------------------------*/
  /*							TYPE 								*/
  /*----------------------------------*/
  /*							 ID                 */  /* <---- Not Used  */ 
  /************************************/
	
	NDEF_Buffer[0] = 0;
	NDEF_Buffer[1] = 0;
	Offset = FIRST_RECORD_OFFSET;
	infoSize = 0;
	
	/* GEO : 1+geo:+latitude+1+longitude */
	geoSize = 1+GEO_TYPE_STRING_LENGTH+strlen(pGeoStruct->Latitude)+URI_LATITUDE_END_LENGTH+strlen(pGeoStruct->Longitude);
	
	/* Check if a Smart poster is needed */
	if (pGeoStruct->Information[0] != '\0')
	{
		/* Info : 1+2+info */
		infoSize = 1+ISO_ENGLISH_CODE_STRING_LENGTH+strlen(pGeoStruct->Information);
		/* Total */
		totalSize = 4+geoSize+4+infoSize;
		if (geoSize > 255) totalSize+=3; /* Normal Geo size */
		if (infoSize > 255) totalSize+=3;  /* Normal Info size */
		
		/* SmartPoster header */
		if (totalSize > 255) 
		{
			NDEF_Buffer[Offset++] = 0xC1;
			NDEF_Buffer[Offset++] = SMART_POSTER_TYPE_STRING_LENGTH;
			NDEF_Buffer[Offset++] = (totalSize & 0xFF000000)>>24;
			NDEF_Buffer[Offset++] = (totalSize & 0x00FF0000)>>16;
			NDEF_Buffer[Offset++] = (totalSize & 0x0000FF00)>>8;
			NDEF_Buffer[Offset++] = (totalSize & 0x000000FF);
		}
		else
		{
			NDEF_Buffer[Offset++] = 0xD1;
			NDEF_Buffer[Offset++] = SMART_POSTER_TYPE_STRING_LENGTH;
			NDEF_Buffer[Offset++] = (uint8_t)totalSize;
		}
		memcpy(&NDEF_Buffer[Offset], SMART_POSTER_TYPE_STRING, SMART_POSTER_TYPE_STRING_LENGTH);
		Offset+=SMART_POSTER_TYPE_STRING_LENGTH;
	}
	
	/* GEO header */
	NDEF_Buffer[Offset] = 0x81;
	if (geoSize < 256) NDEF_Buffer[Offset] |= 0x10; 										 // Set the SR bit
	if (pGeoStruct->Information[0] == '\0') NDEF_Buffer[Offset] |= 0x40; // Set the ME bit
	Offset++;
	
	NDEF_Buffer[Offset++] = URI_TYPE_STRING_LENGTH;
	if (geoSize > 255)
	{
		NDEF_Buffer[Offset++] = (geoSize & 0xFF000000)>>24;
		NDEF_Buffer[Offset++] = (geoSize & 0x00FF0000)>>16;
		NDEF_Buffer[Offset++] = (geoSize & 0x0000FF00)>>8;
		NDEF_Buffer[Offset++] = (geoSize & 0x000000FF);
	}
	else
	{
		NDEF_Buffer[Offset++] = (uint8_t)geoSize;
	}
	memcpy(&NDEF_Buffer[Offset], URI_TYPE_STRING, URI_TYPE_STRING_LENGTH);
	Offset+=URI_TYPE_STRING_LENGTH;
	
	/* GEO payload */
	NDEF_Buffer[Offset++] = URI_ID_0x00; /* URI identifier no abbreviation */
	memcpy(&NDEF_Buffer[Offset], GEO_TYPE_STRING, GEO_TYPE_STRING_LENGTH);
	Offset += GEO_TYPE_STRING_LENGTH;
	memcpy( &NDEF_Buffer[Offset], pGeoStruct->Latitude,strlen(pGeoStruct->Latitude));
	Offset += strlen(pGeoStruct->Latitude);
	memcpy( &NDEF_Buffer[Offset], URI_LATITUDE_END,URI_LATITUDE_END_LENGTH);
	Offset += URI_LATITUDE_END_LENGTH;
	memcpy( &NDEF_Buffer[Offset], pGeoStruct->Longitude, strlen(pGeoStruct->Longitude));
	Offset += strlen(pGeoStruct->Longitude);
	
	/* Information header */
	if (pGeoStruct->Information[0] != '\0')
	{
		if (infoSize > 255)
		{
			NDEF_Buffer[Offset++] = 0x41;
			NDEF_Buffer[Offset++] = TEXT_TYPE_STRING_LENGTH;
			NDEF_Buffer[Offset++] = (infoSize & 0xFF000000)>>24;
			NDEF_Buffer[Offset++] = (infoSize & 0x00FF0000)>>16;
			NDEF_Buffer[Offset++] = (infoSize & 0x0000FF00)>>8;
			NDEF_Buffer[Offset++] = (infoSize & 0x000000FF);
		}
		else
		{
			NDEF_Buffer[Offset++] = 0x51;
			NDEF_Buffer[Offset++] = TEXT_TYPE_STRING_LENGTH;
			NDEF_Buffer[Offset++] = (uint8_t)infoSize;
		}
		
		memcpy(&NDEF_Buffer[Offset], TEXT_TYPE_STRING, TEXT_TYPE_STRING_LENGTH);
		Offset+=TEXT_TYPE_STRING_LENGTH;
		NDEF_Buffer[Offset++] = ISO_ENGLISH_CODE_STRING_LENGTH; /* UTF-8 with x byte language code */
		memcpy(&NDEF_Buffer[Offset], ISO_ENGLISH_CODE_STRING, ISO_ENGLISH_CODE_STRING_LENGTH);
		Offset+=ISO_ENGLISH_CODE_STRING_LENGTH;
    
		/* Information payload */
		memcpy( &NDEF_Buffer[Offset], pGeoStruct->Information,strlen(pGeoStruct->Information));
		Offset += strlen(pGeoStruct->Information);
	}
	
	/* Write NDEF */
	status = WriteData ( 0x00 , Offset , NDEF_Buffer);
  
	/* Write NDEF size to complete*/
	if( status == NDEF_ACTION_COMPLETED)
	{
		Offset -= 2; /* Must not count the 2 byte that represent the NDEF size */
		NDEF_Buffer[0] = (Offset & 0xFF00)>>8;
		NDEF_Buffer[1] = (Offset & 0x00FF);
    
		status = WriteData ( 0x00 , 2 , NDEF_Buffer);
	}
	
	if( status == NDEF_ACTION_COMPLETED)
		return SUCCESS;
	else
		return ERROR;
}


/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/******************* (C) COPYRIGHT 2013 STMicroelectronics *****END OF FILE****/