uint8_t PN532::mifareclassic_WriteNDEFURI (uint8_t sectorNumber, uint8_t uriIdentifier, const char *url)
{
// Figure out how long the string is
uint8_t len = strlen(url);
// Make sure we're within a 1K limit for the sector number
if ((sectorNumber < 1) || (sectorNumber > 15))
return 0;
// Make sure the URI payload is between 1 and 38 chars
if ((len < 1) || (len > 38))
return 0;
// Note 0xD3 0xF7 0xD3 0xF7 0xD3 0xF7 must be used for key A
// in NDEF records
// Setup the sector buffer (w/pre-formatted TLV wrapper and NDEF message)
uint8_t sectorbuffer1[16] = {0x00, 0x00, 0x03, len + 5, 0xD1, 0x01, len + 1, 0x55, uriIdentifier, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t sectorbuffer2[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t sectorbuffer3[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t sectorbuffer4[16] = {0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7, 0x7F, 0x07, 0x88, 0x40, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
if (len <= 6) {
// Unlikely we'll get a url this short, but why not ...
memcpy (sectorbuffer1 + 9, url, len);
sectorbuffer1[len + 9] = 0xFE;
} else if (len == 7) {
// 0xFE needs to be wrapped around to next block
memcpy (sectorbuffer1 + 9, url, len);
sectorbuffer2[0] = 0xFE;
} else if ((len > 7) || (len <= 22)) {
// Url fits in two blocks
memcpy (sectorbuffer1 + 9, url, 7);
memcpy (sectorbuffer2, url + 7, len - 7);
sectorbuffer2[len - 7] = 0xFE;
} else if (len == 23) {
// 0xFE needs to be wrapped around to final block
memcpy (sectorbuffer1 + 9, url, 7);
memcpy (sectorbuffer2, url + 7, len - 7);
sectorbuffer3[0] = 0xFE;
} else {
// Url fits in three blocks
memcpy (sectorbuffer1 + 9, url, 7);
memcpy (sectorbuffer2, url + 7, 16);
memcpy (sectorbuffer3, url + 23, len - 24);
sectorbuffer3[len - 22] = 0xFE;
}
// Now write all three blocks back to the card
if (!(mifareclassic_WriteDataBlock (sectorNumber * 4, sectorbuffer1)))
return 0;
if (!(mifareclassic_WriteDataBlock ((sectorNumber * 4) + 1, sectorbuffer2)))
return 0;
if (!(mifareclassic_WriteDataBlock ((sectorNumber * 4) + 2, sectorbuffer3)))
return 0;
if (!(mifareclassic_WriteDataBlock ((sectorNumber * 4) + 3, sectorbuffer4)))
return 0;
// Seems that everything was OK (?!)
return 1;
}
uint8_t Adafruit_NFCShield_I2C::mifareclassic_FormatNDEF (void)
{
uint8_t sectorbuffer1[16] = {0x14, 0x01, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
uint8_t sectorbuffer2[16] = {0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
uint8_t sectorbuffer3[16] = {0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0x78, 0x77, 0x88, 0xC1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
// Write block 1 and 2 to the card
if (!(mifareclassic_WriteDataBlock (1, sectorbuffer1)))
return 0;
if (!(mifareclassic_WriteDataBlock (2, sectorbuffer2)))
return 0;
// Write key A and access rights card
if (!(mifareclassic_WriteDataBlock (3, sectorbuffer3)))
return 0;
// Seems that everything was OK (?!)
return 1;
}
uint8_t PN532::mifareclassic_FormatNDEF (void)
{
uint8_t sectorbuffer1[16] = {0x14, 0x01, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
uint8_t sectorbuffer2[16] = {0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1, 0x03, 0xE1};
uint8_t sectorbuffer3[16] = {0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0x78, 0x77, 0x88, 0xC1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
// Note 0xA0 0xA1 0xA2 0xA3 0xA4 0xA5 must be used for key A
// for the MAD sector in NDEF records (sector 0)
// Write block 1 and 2 to the card
if (!(mifareclassic_WriteDataBlock (1, sectorbuffer1)))
return 0;
if (!(mifareclassic_WriteDataBlock (2, sectorbuffer2)))
return 0;
// Write key A and access rights card
if (!(mifareclassic_WriteDataBlock (3, sectorbuffer3)))
return 0;
// Seems that everything was OK (?!)
return 1;
}
