to colorize a colorful pixel with a simple touch using nfc technology
Dependencies: Chainable_RGB_LED mbed
use Arch, NFC Shield and Grove - Chainable RGB LED to DIY a touch pixel. Then use an Android with NFC support to colorize it.
The project is on https://github.com/Seeed-Studio/TouchPixel
nfc/NdefMessage.cpp@0:88960f3eeb2c, 2013-12-27 (annotated)
- Committer:
- yihui
- Date:
- Fri Dec 27 01:46:32 2013 +0000
- Revision:
- 0:88960f3eeb2c
initial
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 0:88960f3eeb2c | 1 | #include "NdefMessage.h" |
yihui | 0:88960f3eeb2c | 2 | #include "PN532_debug.h" |
yihui | 0:88960f3eeb2c | 3 | |
yihui | 0:88960f3eeb2c | 4 | NdefMessage::NdefMessage(void) |
yihui | 0:88960f3eeb2c | 5 | { |
yihui | 0:88960f3eeb2c | 6 | _recordCount = 0; |
yihui | 0:88960f3eeb2c | 7 | } |
yihui | 0:88960f3eeb2c | 8 | |
yihui | 0:88960f3eeb2c | 9 | NdefMessage::NdefMessage(const uint8_t * data, const int numuint8_ts) |
yihui | 0:88960f3eeb2c | 10 | { |
yihui | 0:88960f3eeb2c | 11 | #ifdef NDEF_DEBUG |
yihui | 0:88960f3eeb2c | 12 | DMSG("Decoding "));Serial.print(numuint8_ts);DMSG(F(" uint8_ts"); |
yihui | 0:88960f3eeb2c | 13 | PrintHexChar(data, numuint8_ts); |
yihui | 0:88960f3eeb2c | 14 | //DumpHex(data, numuint8_ts, 16); |
yihui | 0:88960f3eeb2c | 15 | #endif |
yihui | 0:88960f3eeb2c | 16 | |
yihui | 0:88960f3eeb2c | 17 | _recordCount = 0; |
yihui | 0:88960f3eeb2c | 18 | |
yihui | 0:88960f3eeb2c | 19 | int index = 0; |
yihui | 0:88960f3eeb2c | 20 | |
yihui | 0:88960f3eeb2c | 21 | while (index <= numuint8_ts) |
yihui | 0:88960f3eeb2c | 22 | { |
yihui | 0:88960f3eeb2c | 23 | |
yihui | 0:88960f3eeb2c | 24 | // decode tnf - first uint8_t is tnf with bit flags |
yihui | 0:88960f3eeb2c | 25 | // see the NFDEF spec for more info |
yihui | 0:88960f3eeb2c | 26 | uint8_t tnf_uint8_t = data[index]; |
yihui | 0:88960f3eeb2c | 27 | bool mb = (tnf_uint8_t & 0x80) != 0; |
yihui | 0:88960f3eeb2c | 28 | bool me = (tnf_uint8_t & 0x40) != 0; |
yihui | 0:88960f3eeb2c | 29 | bool cf = (tnf_uint8_t & 0x20) != 0; |
yihui | 0:88960f3eeb2c | 30 | bool sr = (tnf_uint8_t & 0x10) != 0; |
yihui | 0:88960f3eeb2c | 31 | bool il = (tnf_uint8_t & 0x8) != 0; |
yihui | 0:88960f3eeb2c | 32 | uint8_t tnf = (tnf_uint8_t & 0x7); |
yihui | 0:88960f3eeb2c | 33 | |
yihui | 0:88960f3eeb2c | 34 | NdefRecord record = NdefRecord(); |
yihui | 0:88960f3eeb2c | 35 | record.setTnf(tnf); |
yihui | 0:88960f3eeb2c | 36 | |
yihui | 0:88960f3eeb2c | 37 | index++; |
yihui | 0:88960f3eeb2c | 38 | int typeLength = data[index]; |
yihui | 0:88960f3eeb2c | 39 | |
yihui | 0:88960f3eeb2c | 40 | int payloadLength = 0; |
yihui | 0:88960f3eeb2c | 41 | if (sr) |
yihui | 0:88960f3eeb2c | 42 | { |
yihui | 0:88960f3eeb2c | 43 | index++; |
yihui | 0:88960f3eeb2c | 44 | payloadLength = data[index]; |
yihui | 0:88960f3eeb2c | 45 | } |
yihui | 0:88960f3eeb2c | 46 | else |
yihui | 0:88960f3eeb2c | 47 | { |
yihui | 0:88960f3eeb2c | 48 | payloadLength = ((0xFF & data[++index]) << 24) | ((0xFF & data[++index]) << 26) | |
yihui | 0:88960f3eeb2c | 49 | ((0xFF & data[++index]) << 8) | (0xFF & data[++index]); |
yihui | 0:88960f3eeb2c | 50 | } |
yihui | 0:88960f3eeb2c | 51 | |
yihui | 0:88960f3eeb2c | 52 | int idLength = 0; |
yihui | 0:88960f3eeb2c | 53 | if (il) |
yihui | 0:88960f3eeb2c | 54 | { |
yihui | 0:88960f3eeb2c | 55 | index++; |
yihui | 0:88960f3eeb2c | 56 | idLength = data[index]; |
yihui | 0:88960f3eeb2c | 57 | } |
yihui | 0:88960f3eeb2c | 58 | |
yihui | 0:88960f3eeb2c | 59 | index++; |
yihui | 0:88960f3eeb2c | 60 | record.setType(&data[index], typeLength); |
yihui | 0:88960f3eeb2c | 61 | index += typeLength; |
yihui | 0:88960f3eeb2c | 62 | |
yihui | 0:88960f3eeb2c | 63 | if (il) |
yihui | 0:88960f3eeb2c | 64 | { |
yihui | 0:88960f3eeb2c | 65 | record.setId(&data[index], idLength); |
yihui | 0:88960f3eeb2c | 66 | index += idLength; |
yihui | 0:88960f3eeb2c | 67 | } |
yihui | 0:88960f3eeb2c | 68 | |
yihui | 0:88960f3eeb2c | 69 | record.setPayload(&data[index], payloadLength); |
yihui | 0:88960f3eeb2c | 70 | index += payloadLength; |
yihui | 0:88960f3eeb2c | 71 | |
yihui | 0:88960f3eeb2c | 72 | addRecord(record); |
yihui | 0:88960f3eeb2c | 73 | |
yihui | 0:88960f3eeb2c | 74 | if (me) break; // last message |
yihui | 0:88960f3eeb2c | 75 | } |
yihui | 0:88960f3eeb2c | 76 | |
yihui | 0:88960f3eeb2c | 77 | } |
yihui | 0:88960f3eeb2c | 78 | |
yihui | 0:88960f3eeb2c | 79 | NdefMessage::NdefMessage(const NdefMessage& rhs) |
yihui | 0:88960f3eeb2c | 80 | { |
yihui | 0:88960f3eeb2c | 81 | |
yihui | 0:88960f3eeb2c | 82 | _recordCount = rhs._recordCount; |
yihui | 0:88960f3eeb2c | 83 | for (int i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 84 | { |
yihui | 0:88960f3eeb2c | 85 | _records[i] = rhs._records[i]; |
yihui | 0:88960f3eeb2c | 86 | } |
yihui | 0:88960f3eeb2c | 87 | |
yihui | 0:88960f3eeb2c | 88 | } |
yihui | 0:88960f3eeb2c | 89 | |
yihui | 0:88960f3eeb2c | 90 | NdefMessage::~NdefMessage() |
yihui | 0:88960f3eeb2c | 91 | { |
yihui | 0:88960f3eeb2c | 92 | } |
yihui | 0:88960f3eeb2c | 93 | |
yihui | 0:88960f3eeb2c | 94 | NdefMessage& NdefMessage::operator=(const NdefMessage& rhs) |
yihui | 0:88960f3eeb2c | 95 | { |
yihui | 0:88960f3eeb2c | 96 | |
yihui | 0:88960f3eeb2c | 97 | if (this != &rhs) |
yihui | 0:88960f3eeb2c | 98 | { |
yihui | 0:88960f3eeb2c | 99 | |
yihui | 0:88960f3eeb2c | 100 | // delete existing records |
yihui | 0:88960f3eeb2c | 101 | for (int i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 102 | { |
yihui | 0:88960f3eeb2c | 103 | // TODO Dave: is this the right way to delete existing records? |
yihui | 0:88960f3eeb2c | 104 | _records[i] = NdefRecord(); |
yihui | 0:88960f3eeb2c | 105 | } |
yihui | 0:88960f3eeb2c | 106 | |
yihui | 0:88960f3eeb2c | 107 | _recordCount = rhs._recordCount; |
yihui | 0:88960f3eeb2c | 108 | for (int i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 109 | { |
yihui | 0:88960f3eeb2c | 110 | _records[i] = rhs._records[i]; |
yihui | 0:88960f3eeb2c | 111 | } |
yihui | 0:88960f3eeb2c | 112 | } |
yihui | 0:88960f3eeb2c | 113 | return *this; |
yihui | 0:88960f3eeb2c | 114 | } |
yihui | 0:88960f3eeb2c | 115 | |
yihui | 0:88960f3eeb2c | 116 | unsigned int NdefMessage::getRecordCount() |
yihui | 0:88960f3eeb2c | 117 | { |
yihui | 0:88960f3eeb2c | 118 | return _recordCount; |
yihui | 0:88960f3eeb2c | 119 | } |
yihui | 0:88960f3eeb2c | 120 | |
yihui | 0:88960f3eeb2c | 121 | int NdefMessage::getEncodedSize() |
yihui | 0:88960f3eeb2c | 122 | { |
yihui | 0:88960f3eeb2c | 123 | int size = 0; |
yihui | 0:88960f3eeb2c | 124 | for (int i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 125 | { |
yihui | 0:88960f3eeb2c | 126 | size += _records[i].getEncodedSize(); |
yihui | 0:88960f3eeb2c | 127 | } |
yihui | 0:88960f3eeb2c | 128 | return size; |
yihui | 0:88960f3eeb2c | 129 | } |
yihui | 0:88960f3eeb2c | 130 | |
yihui | 0:88960f3eeb2c | 131 | // TODO change this to return uint8_t* |
yihui | 0:88960f3eeb2c | 132 | void NdefMessage::encode(uint8_t* data) |
yihui | 0:88960f3eeb2c | 133 | { |
yihui | 0:88960f3eeb2c | 134 | // assert sizeof(data) >= getEncodedSize() |
yihui | 0:88960f3eeb2c | 135 | uint8_t* data_ptr = &data[0]; |
yihui | 0:88960f3eeb2c | 136 | |
yihui | 0:88960f3eeb2c | 137 | for (int i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 138 | { |
yihui | 0:88960f3eeb2c | 139 | _records[i].encode(data_ptr, i == 0, (i + 1) == _recordCount); |
yihui | 0:88960f3eeb2c | 140 | // TODO can NdefRecord.encode return the record size? |
yihui | 0:88960f3eeb2c | 141 | data_ptr += _records[i].getEncodedSize(); |
yihui | 0:88960f3eeb2c | 142 | } |
yihui | 0:88960f3eeb2c | 143 | |
yihui | 0:88960f3eeb2c | 144 | } |
yihui | 0:88960f3eeb2c | 145 | |
yihui | 0:88960f3eeb2c | 146 | bool NdefMessage::addRecord(NdefRecord& record) |
yihui | 0:88960f3eeb2c | 147 | { |
yihui | 0:88960f3eeb2c | 148 | |
yihui | 0:88960f3eeb2c | 149 | if (_recordCount < MAX_NDEF_RECORDS) |
yihui | 0:88960f3eeb2c | 150 | { |
yihui | 0:88960f3eeb2c | 151 | _records[_recordCount] = record; |
yihui | 0:88960f3eeb2c | 152 | _recordCount++; |
yihui | 0:88960f3eeb2c | 153 | return true; |
yihui | 0:88960f3eeb2c | 154 | } |
yihui | 0:88960f3eeb2c | 155 | else |
yihui | 0:88960f3eeb2c | 156 | { |
yihui | 0:88960f3eeb2c | 157 | DMSG("WARNING: Too many records. Increase MAX_NDEF_RECORDS."); |
yihui | 0:88960f3eeb2c | 158 | return false; |
yihui | 0:88960f3eeb2c | 159 | } |
yihui | 0:88960f3eeb2c | 160 | } |
yihui | 0:88960f3eeb2c | 161 | |
yihui | 0:88960f3eeb2c | 162 | void NdefMessage::addMimeMediaRecord(string mimeType, string payload) |
yihui | 0:88960f3eeb2c | 163 | { |
yihui | 0:88960f3eeb2c | 164 | |
yihui | 0:88960f3eeb2c | 165 | uint8_t payloaduint8_ts[payload.length() + 1]; |
yihui | 0:88960f3eeb2c | 166 | payload.copy((char*)payloaduint8_ts, sizeof(payloaduint8_ts)); |
yihui | 0:88960f3eeb2c | 167 | |
yihui | 0:88960f3eeb2c | 168 | addMimeMediaRecord(mimeType, payloaduint8_ts, payload.length()); |
yihui | 0:88960f3eeb2c | 169 | } |
yihui | 0:88960f3eeb2c | 170 | |
yihui | 0:88960f3eeb2c | 171 | void NdefMessage::addMimeMediaRecord(string mimeType, uint8_t* payload, int payloadLength) |
yihui | 0:88960f3eeb2c | 172 | { |
yihui | 0:88960f3eeb2c | 173 | NdefRecord r = NdefRecord(); |
yihui | 0:88960f3eeb2c | 174 | r.setTnf(TNF_MIME_MEDIA); |
yihui | 0:88960f3eeb2c | 175 | |
yihui | 0:88960f3eeb2c | 176 | uint8_t type[mimeType.length() + 1]; |
yihui | 0:88960f3eeb2c | 177 | mimeType.copy((char*)type, sizeof(type)); |
yihui | 0:88960f3eeb2c | 178 | r.setType(type, mimeType.length()); |
yihui | 0:88960f3eeb2c | 179 | |
yihui | 0:88960f3eeb2c | 180 | r.setPayload(payload, payloadLength); |
yihui | 0:88960f3eeb2c | 181 | |
yihui | 0:88960f3eeb2c | 182 | addRecord(r); |
yihui | 0:88960f3eeb2c | 183 | } |
yihui | 0:88960f3eeb2c | 184 | |
yihui | 0:88960f3eeb2c | 185 | void NdefMessage::addTextRecord(string text) |
yihui | 0:88960f3eeb2c | 186 | { |
yihui | 0:88960f3eeb2c | 187 | addTextRecord(text, "en"); |
yihui | 0:88960f3eeb2c | 188 | } |
yihui | 0:88960f3eeb2c | 189 | |
yihui | 0:88960f3eeb2c | 190 | void NdefMessage::addTextRecord(string text, string encoding) |
yihui | 0:88960f3eeb2c | 191 | { |
yihui | 0:88960f3eeb2c | 192 | NdefRecord r = NdefRecord(); |
yihui | 0:88960f3eeb2c | 193 | r.setTnf(TNF_WELL_KNOWN); |
yihui | 0:88960f3eeb2c | 194 | |
yihui | 0:88960f3eeb2c | 195 | uint8_t RTD_TEXT[1] = { 0x54 }; // TODO this should be a constant or preprocessor |
yihui | 0:88960f3eeb2c | 196 | r.setType(RTD_TEXT, sizeof(RTD_TEXT)); |
yihui | 0:88960f3eeb2c | 197 | |
yihui | 0:88960f3eeb2c | 198 | // X is a placeholder for encoding length |
yihui | 0:88960f3eeb2c | 199 | // TODO is it more efficient to build w/o string concatenation? |
yihui | 0:88960f3eeb2c | 200 | string payloadString = "X" + encoding + text; |
yihui | 0:88960f3eeb2c | 201 | |
yihui | 0:88960f3eeb2c | 202 | uint8_t payload[payloadString.length() + 1]; |
yihui | 0:88960f3eeb2c | 203 | payloadString.copy((char*)payload, sizeof(payload)); |
yihui | 0:88960f3eeb2c | 204 | |
yihui | 0:88960f3eeb2c | 205 | // replace X with the real encoding length |
yihui | 0:88960f3eeb2c | 206 | payload[0] = encoding.length(); |
yihui | 0:88960f3eeb2c | 207 | |
yihui | 0:88960f3eeb2c | 208 | r.setPayload(payload, payloadString.length()); |
yihui | 0:88960f3eeb2c | 209 | |
yihui | 0:88960f3eeb2c | 210 | addRecord(r); |
yihui | 0:88960f3eeb2c | 211 | } |
yihui | 0:88960f3eeb2c | 212 | |
yihui | 0:88960f3eeb2c | 213 | void NdefMessage::addUriRecord(string uri) |
yihui | 0:88960f3eeb2c | 214 | { |
yihui | 0:88960f3eeb2c | 215 | NdefRecord* r = new NdefRecord(); |
yihui | 0:88960f3eeb2c | 216 | r->setTnf(TNF_WELL_KNOWN); |
yihui | 0:88960f3eeb2c | 217 | |
yihui | 0:88960f3eeb2c | 218 | uint8_t RTD_URI[1] = { 0x55 }; // TODO this should be a constant or preprocessor |
yihui | 0:88960f3eeb2c | 219 | r->setType(RTD_URI, sizeof(RTD_URI)); |
yihui | 0:88960f3eeb2c | 220 | |
yihui | 0:88960f3eeb2c | 221 | // X is a placeholder for identifier code |
yihui | 0:88960f3eeb2c | 222 | string payloadString = "X" + uri; |
yihui | 0:88960f3eeb2c | 223 | |
yihui | 0:88960f3eeb2c | 224 | uint8_t payload[payloadString.length() + 1]; |
yihui | 0:88960f3eeb2c | 225 | payloadString.copy((char*)payload, sizeof(payload)); |
yihui | 0:88960f3eeb2c | 226 | |
yihui | 0:88960f3eeb2c | 227 | // add identifier code 0x0, meaning no prefix substitution |
yihui | 0:88960f3eeb2c | 228 | payload[0] = 0x0; |
yihui | 0:88960f3eeb2c | 229 | |
yihui | 0:88960f3eeb2c | 230 | r->setPayload(payload, payloadString.length()); |
yihui | 0:88960f3eeb2c | 231 | |
yihui | 0:88960f3eeb2c | 232 | addRecord(*r); |
yihui | 0:88960f3eeb2c | 233 | delete(r); |
yihui | 0:88960f3eeb2c | 234 | } |
yihui | 0:88960f3eeb2c | 235 | |
yihui | 0:88960f3eeb2c | 236 | void NdefMessage::addEmptyRecord() |
yihui | 0:88960f3eeb2c | 237 | { |
yihui | 0:88960f3eeb2c | 238 | NdefRecord* r = new NdefRecord(); |
yihui | 0:88960f3eeb2c | 239 | r->setTnf(TNF_EMPTY); |
yihui | 0:88960f3eeb2c | 240 | addRecord(*r); |
yihui | 0:88960f3eeb2c | 241 | delete(r); |
yihui | 0:88960f3eeb2c | 242 | } |
yihui | 0:88960f3eeb2c | 243 | |
yihui | 0:88960f3eeb2c | 244 | NdefRecord NdefMessage::getRecord(int index) |
yihui | 0:88960f3eeb2c | 245 | { |
yihui | 0:88960f3eeb2c | 246 | if (index > -1 && index < _recordCount) |
yihui | 0:88960f3eeb2c | 247 | { |
yihui | 0:88960f3eeb2c | 248 | return _records[index]; |
yihui | 0:88960f3eeb2c | 249 | } |
yihui | 0:88960f3eeb2c | 250 | else |
yihui | 0:88960f3eeb2c | 251 | { |
yihui | 0:88960f3eeb2c | 252 | return NdefRecord(); // would rather return NULL |
yihui | 0:88960f3eeb2c | 253 | } |
yihui | 0:88960f3eeb2c | 254 | } |
yihui | 0:88960f3eeb2c | 255 | |
yihui | 0:88960f3eeb2c | 256 | NdefRecord NdefMessage::operator[](int index) |
yihui | 0:88960f3eeb2c | 257 | { |
yihui | 0:88960f3eeb2c | 258 | return getRecord(index); |
yihui | 0:88960f3eeb2c | 259 | } |
yihui | 0:88960f3eeb2c | 260 | |
yihui | 0:88960f3eeb2c | 261 | void NdefMessage::print() |
yihui | 0:88960f3eeb2c | 262 | { |
yihui | 0:88960f3eeb2c | 263 | DMSG("\nNDEF Message "); |
yihui | 0:88960f3eeb2c | 264 | DMSG_INT(_recordCount); |
yihui | 0:88960f3eeb2c | 265 | DMSG(" record"); |
yihui | 0:88960f3eeb2c | 266 | if (_recordCount == 1) { |
yihui | 0:88960f3eeb2c | 267 | DMSG(", "); |
yihui | 0:88960f3eeb2c | 268 | } else { |
yihui | 0:88960f3eeb2c | 269 | DMSG("s, "); |
yihui | 0:88960f3eeb2c | 270 | } |
yihui | 0:88960f3eeb2c | 271 | DMSG_INT(getEncodedSize()); |
yihui | 0:88960f3eeb2c | 272 | |
yihui | 0:88960f3eeb2c | 273 | int i; |
yihui | 0:88960f3eeb2c | 274 | for (i = 0; i < _recordCount; i++) |
yihui | 0:88960f3eeb2c | 275 | { |
yihui | 0:88960f3eeb2c | 276 | _records[i].print(); |
yihui | 0:88960f3eeb2c | 277 | } |
yihui | 0:88960f3eeb2c | 278 | } |