NDEF C Reference¶
Defines
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URL_RECORDTYPE¶
NDEF record type for a URL.
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URL_RECORDTYPE_LEN¶
Length of the NDEF record type in bytes.
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SMPLINTKEY_LEN¶
Length of the sample interval key string in bytes.
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SMPLINTB64_LEN¶
Length of the encoded sample interval string in bytes.
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SERIALKEY_LEN¶
Length of the serial key string in bytes.
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VERKEY_LEN¶
Length of the vfmt key string in bytes.
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VFMTB64_LEN¶
Length of the encoded VFmt data in bytes.
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STATKEY_LEN¶
Length of the status key string in bytes.
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CBUFKEY_LEN¶
Length of the circular buffer key string in bytes.
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NDEF_RECORD_HEADER_LEN¶
Length of the NDEF record header in bytes.
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TL_LEN¶
Length of the Tag and Length fields of the NDEF message TLV in bytes.
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TAG_NDEF_MESSSAGE¶
Tag indicating the TLV block contains an NDEF message.
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WELLKNOWN_TNF¶
Record Type follows the Record Type Definition (RTD) format.
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URI_ID_HTTP¶
URI Identifier Code for the HTTP protocol.
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URI_ID_HTTPS¶
URI Identifier Code for the HTTPS protocol.
Functions
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static void ndef_createurlrecord(int *eepindex, int msglenbytes, int httpsDisable)¶
Create a URL NDEF Record.
- Parameters
eepindex – Position in the 64-byte array that buffers data to be written into EEPROM.
msglenbytes – NDEF Message Length in bytes.
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void ndef_calclen(int *paddinglen, int *preamblenbytes, int *urllen)¶
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int ndef_writepreamble(int buflenblks, char *statusb64)¶
Write the part of the URL before the circular buffer.
- Parameters
buflenblks – Circular buffer length in 16-byte EEPROM blocks.
statusb64 – Pointer to a base64 encoded status structure.
- Returns
1 if buflenblks is not even.
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void ndef_writeblankurl(int buflenblks, char *statusb64, int *bufstartblk)¶
Write an NDEF message containing one URL record to EEPROM. The URL contains a circular buffer. This is populated with a placeholder text - all zeroes - initially.
- Parameters
buflenblks – Circular buffer length in 16-byte EEPROM blocks.
statusb64 – Pointer to a base64 encoded status structure.
bufstartblk – The circular buffer start block is written to this pointer.
Variables
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nv_t nv
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static const char serialkey[] =
"&s="¶ Seperator, key and equals before the serial string.
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static const char cbufkey[] =
"&q="¶ Seperator, key and equals before the circular buffer string.
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static const char verkey[] =
"&v="¶ Seperator, key and equals before the vfmt string.
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static const char statkey[] =
"&x="¶ Seperator, key and equals before the status string.
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static const char smplintkey[] =
"/?t="¶ Start of parameters followed by a key and equals for the sample interval string.
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static const char zeropad[] =
"MDAw"¶ 4 characters that base64 decode to 0,0,0
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union TNFFlags_t¶
Public Members
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unsigned char all¶
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unsigned char tnf¶
Type Name Format field.
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unsigned char idpresent¶
ID present flag. 1 if the ID field is present.
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unsigned char srecord¶
Short record flag. 1 if the payload length field is 1 byte long.
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unsigned char chunkflag¶
Chunk flag. 1 if this is the first or middle record in a chunked message.
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unsigned char msgend¶
Message end flag. 1 if this is the last record in the message.
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unsigned char msgbegin¶
Message begin flag. 1 if this is the first record in the message.
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struct TNFFlags_t::[anonymous] byte¶
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unsigned char all¶
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union len_t¶