NFC library using PN532 to read/write NDEF Messages to NFC tags
Dependents: Seeed_NFC_Shield_write Nucleo_test_nfc
Fork of PN532 by
llcp.cpp@3:4189a10038e6, 2013-11-21 (annotated)
- Committer:
- yihui
- Date:
- Thu Nov 21 04:30:49 2013 +0000
- Revision:
- 3:4189a10038e6
sync with https://github.com/Seeed-Studio/PN532/releases/tag/v0.9.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 3:4189a10038e6 | 1 | |
yihui | 3:4189a10038e6 | 2 | #include "llcp.h" |
yihui | 3:4189a10038e6 | 3 | #include "PN532_debug.h" |
yihui | 3:4189a10038e6 | 4 | |
yihui | 3:4189a10038e6 | 5 | // LLCP PDU Type Values |
yihui | 3:4189a10038e6 | 6 | #define PDU_SYMM 0x00 |
yihui | 3:4189a10038e6 | 7 | #define PDU_PAX 0x01 |
yihui | 3:4189a10038e6 | 8 | #define PDU_CONNECT 0x04 |
yihui | 3:4189a10038e6 | 9 | #define PDU_DISC 0x05 |
yihui | 3:4189a10038e6 | 10 | #define PDU_CC 0x06 |
yihui | 3:4189a10038e6 | 11 | #define PDU_DM 0x07 |
yihui | 3:4189a10038e6 | 12 | #define PDU_I 0x0c |
yihui | 3:4189a10038e6 | 13 | #define PDU_RR 0x0d |
yihui | 3:4189a10038e6 | 14 | |
yihui | 3:4189a10038e6 | 15 | uint8_t LLCP::SYMM_PDU[2] = {0, 0}; |
yihui | 3:4189a10038e6 | 16 | |
yihui | 3:4189a10038e6 | 17 | inline uint8_t getPType(const uint8_t *buf) |
yihui | 3:4189a10038e6 | 18 | { |
yihui | 3:4189a10038e6 | 19 | return ((buf[0] & 0x3) << 2) + (buf[1] >> 6); |
yihui | 3:4189a10038e6 | 20 | } |
yihui | 3:4189a10038e6 | 21 | |
yihui | 3:4189a10038e6 | 22 | inline uint8_t getSSAP(const uint8_t *buf) |
yihui | 3:4189a10038e6 | 23 | { |
yihui | 3:4189a10038e6 | 24 | return buf[1] & 0x3f; |
yihui | 3:4189a10038e6 | 25 | } |
yihui | 3:4189a10038e6 | 26 | |
yihui | 3:4189a10038e6 | 27 | inline uint8_t getDSAP(const uint8_t *buf) |
yihui | 3:4189a10038e6 | 28 | { |
yihui | 3:4189a10038e6 | 29 | return buf[0] >> 2; |
yihui | 3:4189a10038e6 | 30 | } |
yihui | 3:4189a10038e6 | 31 | |
yihui | 3:4189a10038e6 | 32 | int8_t LLCP::activate(uint16_t timeout) |
yihui | 3:4189a10038e6 | 33 | { |
yihui | 3:4189a10038e6 | 34 | return link.activateAsTarget(timeout); |
yihui | 3:4189a10038e6 | 35 | } |
yihui | 3:4189a10038e6 | 36 | |
yihui | 3:4189a10038e6 | 37 | int8_t LLCP::waitForConnection(uint16_t timeout) |
yihui | 3:4189a10038e6 | 38 | { |
yihui | 3:4189a10038e6 | 39 | uint8_t type; |
yihui | 3:4189a10038e6 | 40 | |
yihui | 3:4189a10038e6 | 41 | ns = 0; |
yihui | 3:4189a10038e6 | 42 | nr = 0; |
yihui | 3:4189a10038e6 | 43 | |
yihui | 3:4189a10038e6 | 44 | // Get CONNECT PDU |
yihui | 3:4189a10038e6 | 45 | DMSG("wait for a CONNECT PDU\n"); |
yihui | 3:4189a10038e6 | 46 | do { |
yihui | 3:4189a10038e6 | 47 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 48 | return -1; |
yihui | 3:4189a10038e6 | 49 | } |
yihui | 3:4189a10038e6 | 50 | |
yihui | 3:4189a10038e6 | 51 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 52 | if (PDU_CONNECT == type) { |
yihui | 3:4189a10038e6 | 53 | break; |
yihui | 3:4189a10038e6 | 54 | } else if (PDU_SYMM == type) { |
yihui | 3:4189a10038e6 | 55 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 56 | return -2; |
yihui | 3:4189a10038e6 | 57 | } |
yihui | 3:4189a10038e6 | 58 | } else { |
yihui | 3:4189a10038e6 | 59 | return -3; |
yihui | 3:4189a10038e6 | 60 | } |
yihui | 3:4189a10038e6 | 61 | |
yihui | 3:4189a10038e6 | 62 | } while (1); |
yihui | 3:4189a10038e6 | 63 | |
yihui | 3:4189a10038e6 | 64 | // Put CC PDU |
yihui | 3:4189a10038e6 | 65 | DMSG("put a CC(Connection Complete) PDU to response the CONNECT PDU\n"); |
yihui | 3:4189a10038e6 | 66 | ssap = getDSAP(headerBuf); |
yihui | 3:4189a10038e6 | 67 | dsap = getSSAP(headerBuf); |
yihui | 3:4189a10038e6 | 68 | headerBuf[0] = (dsap << 2) + ((PDU_CC >> 2) & 0x3); |
yihui | 3:4189a10038e6 | 69 | headerBuf[1] = ((PDU_CC & 0x3) << 6) + ssap; |
yihui | 3:4189a10038e6 | 70 | if (!link.write(headerBuf, 2)) { |
yihui | 3:4189a10038e6 | 71 | return -2; |
yihui | 3:4189a10038e6 | 72 | } |
yihui | 3:4189a10038e6 | 73 | |
yihui | 3:4189a10038e6 | 74 | return 1; |
yihui | 3:4189a10038e6 | 75 | } |
yihui | 3:4189a10038e6 | 76 | |
yihui | 3:4189a10038e6 | 77 | int8_t LLCP::waitForDisconnection(uint16_t timeout) |
yihui | 3:4189a10038e6 | 78 | { |
yihui | 3:4189a10038e6 | 79 | uint8_t type; |
yihui | 3:4189a10038e6 | 80 | |
yihui | 3:4189a10038e6 | 81 | // Get DISC PDU |
yihui | 3:4189a10038e6 | 82 | DMSG("wait for a DISC PDU\n"); |
yihui | 3:4189a10038e6 | 83 | do { |
yihui | 3:4189a10038e6 | 84 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 85 | return -1; |
yihui | 3:4189a10038e6 | 86 | } |
yihui | 3:4189a10038e6 | 87 | |
yihui | 3:4189a10038e6 | 88 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 89 | if (PDU_DISC == type) { |
yihui | 3:4189a10038e6 | 90 | break; |
yihui | 3:4189a10038e6 | 91 | } else if (PDU_SYMM == type) { |
yihui | 3:4189a10038e6 | 92 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 93 | return -2; |
yihui | 3:4189a10038e6 | 94 | } |
yihui | 3:4189a10038e6 | 95 | } else { |
yihui | 3:4189a10038e6 | 96 | return -3; |
yihui | 3:4189a10038e6 | 97 | } |
yihui | 3:4189a10038e6 | 98 | |
yihui | 3:4189a10038e6 | 99 | } while (1); |
yihui | 3:4189a10038e6 | 100 | |
yihui | 3:4189a10038e6 | 101 | // Put DM PDU |
yihui | 3:4189a10038e6 | 102 | DMSG("put a DM(Disconnect Mode) PDU to response the DISC PDU\n"); |
yihui | 3:4189a10038e6 | 103 | // ssap = getDSAP(headerBuf); |
yihui | 3:4189a10038e6 | 104 | // dsap = getSSAP(headerBuf); |
yihui | 3:4189a10038e6 | 105 | headerBuf[0] = (dsap << 2) + (PDU_DM >> 2); |
yihui | 3:4189a10038e6 | 106 | headerBuf[1] = ((PDU_DM & 0x3) << 6) + ssap; |
yihui | 3:4189a10038e6 | 107 | if (!link.write(headerBuf, 2)) { |
yihui | 3:4189a10038e6 | 108 | return -2; |
yihui | 3:4189a10038e6 | 109 | } |
yihui | 3:4189a10038e6 | 110 | |
yihui | 3:4189a10038e6 | 111 | return 1; |
yihui | 3:4189a10038e6 | 112 | } |
yihui | 3:4189a10038e6 | 113 | |
yihui | 3:4189a10038e6 | 114 | int8_t LLCP::connect(uint16_t timeout) |
yihui | 3:4189a10038e6 | 115 | { |
yihui | 3:4189a10038e6 | 116 | uint8_t type; |
yihui | 3:4189a10038e6 | 117 | |
yihui | 3:4189a10038e6 | 118 | ns = 0; |
yihui | 3:4189a10038e6 | 119 | nr = 0; |
yihui | 3:4189a10038e6 | 120 | |
yihui | 3:4189a10038e6 | 121 | // try to get a SYMM PDU |
yihui | 3:4189a10038e6 | 122 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 123 | return -1; |
yihui | 3:4189a10038e6 | 124 | } |
yihui | 3:4189a10038e6 | 125 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 126 | if (PDU_SYMM != type) { |
yihui | 3:4189a10038e6 | 127 | return -1; |
yihui | 3:4189a10038e6 | 128 | } |
yihui | 3:4189a10038e6 | 129 | |
yihui | 3:4189a10038e6 | 130 | dsap = LLCP_DEFAULT_DSAP; |
yihui | 3:4189a10038e6 | 131 | ssap = LLCP_DEFAULT_SSAP; |
yihui | 3:4189a10038e6 | 132 | |
yihui | 3:4189a10038e6 | 133 | // put a CONNECT PDU |
yihui | 3:4189a10038e6 | 134 | headerBuf[0] = (LLCP_DEFAULT_DSAP << 2) + (PDU_CONNECT >> 2); |
yihui | 3:4189a10038e6 | 135 | headerBuf[1] = ((PDU_CONNECT & 0x03) << 6) + LLCP_DEFAULT_SSAP; |
yihui | 3:4189a10038e6 | 136 | if (!link.write(headerBuf, 2)) { |
yihui | 3:4189a10038e6 | 137 | return -2; |
yihui | 3:4189a10038e6 | 138 | } |
yihui | 3:4189a10038e6 | 139 | |
yihui | 3:4189a10038e6 | 140 | // wait for a CC PDU |
yihui | 3:4189a10038e6 | 141 | DMSG("wait for a CC PDU\n"); |
yihui | 3:4189a10038e6 | 142 | do { |
yihui | 3:4189a10038e6 | 143 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 144 | return -1; |
yihui | 3:4189a10038e6 | 145 | } |
yihui | 3:4189a10038e6 | 146 | |
yihui | 3:4189a10038e6 | 147 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 148 | if (PDU_CC == type) { |
yihui | 3:4189a10038e6 | 149 | break; |
yihui | 3:4189a10038e6 | 150 | } else if (PDU_SYMM == type) { |
yihui | 3:4189a10038e6 | 151 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 152 | return -2; |
yihui | 3:4189a10038e6 | 153 | } |
yihui | 3:4189a10038e6 | 154 | } else { |
yihui | 3:4189a10038e6 | 155 | return -3; |
yihui | 3:4189a10038e6 | 156 | } |
yihui | 3:4189a10038e6 | 157 | |
yihui | 3:4189a10038e6 | 158 | } while (1); |
yihui | 3:4189a10038e6 | 159 | |
yihui | 3:4189a10038e6 | 160 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 161 | return -2; |
yihui | 3:4189a10038e6 | 162 | } |
yihui | 3:4189a10038e6 | 163 | |
yihui | 3:4189a10038e6 | 164 | return 1; |
yihui | 3:4189a10038e6 | 165 | } |
yihui | 3:4189a10038e6 | 166 | |
yihui | 3:4189a10038e6 | 167 | int8_t LLCP::disconnect(uint16_t timeout) |
yihui | 3:4189a10038e6 | 168 | { |
yihui | 3:4189a10038e6 | 169 | uint8_t type; |
yihui | 3:4189a10038e6 | 170 | |
yihui | 3:4189a10038e6 | 171 | // try to get a SYMM PDU |
yihui | 3:4189a10038e6 | 172 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 173 | return -1; |
yihui | 3:4189a10038e6 | 174 | } |
yihui | 3:4189a10038e6 | 175 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 176 | if (PDU_SYMM != type) { |
yihui | 3:4189a10038e6 | 177 | return -1; |
yihui | 3:4189a10038e6 | 178 | } |
yihui | 3:4189a10038e6 | 179 | |
yihui | 3:4189a10038e6 | 180 | // put a DISC PDU |
yihui | 3:4189a10038e6 | 181 | headerBuf[0] = (LLCP_DEFAULT_DSAP << 2) + (PDU_DISC >> 2); |
yihui | 3:4189a10038e6 | 182 | headerBuf[1] = ((PDU_DISC & 0x03) << 6) + LLCP_DEFAULT_SSAP; |
yihui | 3:4189a10038e6 | 183 | if (!link.write(headerBuf, 2)) { |
yihui | 3:4189a10038e6 | 184 | return -2; |
yihui | 3:4189a10038e6 | 185 | } |
yihui | 3:4189a10038e6 | 186 | |
yihui | 3:4189a10038e6 | 187 | // wait for a DM PDU |
yihui | 3:4189a10038e6 | 188 | DMSG("wait for a DM PDU\n"); |
yihui | 3:4189a10038e6 | 189 | do { |
yihui | 3:4189a10038e6 | 190 | if (2 > link.read(headerBuf, headerBufLen)) { |
yihui | 3:4189a10038e6 | 191 | return -1; |
yihui | 3:4189a10038e6 | 192 | } |
yihui | 3:4189a10038e6 | 193 | |
yihui | 3:4189a10038e6 | 194 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 195 | if (PDU_CC == type) { |
yihui | 3:4189a10038e6 | 196 | break; |
yihui | 3:4189a10038e6 | 197 | } else if (PDU_DM == type) { |
yihui | 3:4189a10038e6 | 198 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 199 | return -2; |
yihui | 3:4189a10038e6 | 200 | } |
yihui | 3:4189a10038e6 | 201 | } else { |
yihui | 3:4189a10038e6 | 202 | return -3; |
yihui | 3:4189a10038e6 | 203 | } |
yihui | 3:4189a10038e6 | 204 | |
yihui | 3:4189a10038e6 | 205 | } while (1); |
yihui | 3:4189a10038e6 | 206 | |
yihui | 3:4189a10038e6 | 207 | return 1; |
yihui | 3:4189a10038e6 | 208 | } |
yihui | 3:4189a10038e6 | 209 | |
yihui | 3:4189a10038e6 | 210 | bool LLCP::write(const uint8_t *header, uint8_t hlen, const uint8_t *body, uint8_t blen) |
yihui | 3:4189a10038e6 | 211 | { |
yihui | 3:4189a10038e6 | 212 | uint8_t type; |
yihui | 3:4189a10038e6 | 213 | uint8_t buf[3]; |
yihui | 3:4189a10038e6 | 214 | |
yihui | 3:4189a10038e6 | 215 | // Get a SYMM PDU |
yihui | 3:4189a10038e6 | 216 | if (2 != link.read(buf, sizeof(buf))) { |
yihui | 3:4189a10038e6 | 217 | return false; |
yihui | 3:4189a10038e6 | 218 | } |
yihui | 3:4189a10038e6 | 219 | |
yihui | 3:4189a10038e6 | 220 | if (headerBufLen < (hlen + 3)) { |
yihui | 3:4189a10038e6 | 221 | return false; |
yihui | 3:4189a10038e6 | 222 | } |
yihui | 3:4189a10038e6 | 223 | |
yihui | 3:4189a10038e6 | 224 | for (int8_t i = hlen - 1; i >= 0; i--) { |
yihui | 3:4189a10038e6 | 225 | headerBuf[i + 3] = header[i]; |
yihui | 3:4189a10038e6 | 226 | } |
yihui | 3:4189a10038e6 | 227 | |
yihui | 3:4189a10038e6 | 228 | headerBuf[0] = (dsap << 2) + (PDU_I >> 2); |
yihui | 3:4189a10038e6 | 229 | headerBuf[1] = ((PDU_I & 0x3) << 6) + ssap; |
yihui | 3:4189a10038e6 | 230 | headerBuf[2] = (ns << 4) + nr; |
yihui | 3:4189a10038e6 | 231 | if (!link.write(headerBuf, 3 + hlen, body, blen)) { |
yihui | 3:4189a10038e6 | 232 | return false; |
yihui | 3:4189a10038e6 | 233 | } |
yihui | 3:4189a10038e6 | 234 | |
yihui | 3:4189a10038e6 | 235 | ns++; |
yihui | 3:4189a10038e6 | 236 | |
yihui | 3:4189a10038e6 | 237 | // Get a RR PDU |
yihui | 3:4189a10038e6 | 238 | int16_t status; |
yihui | 3:4189a10038e6 | 239 | do { |
yihui | 3:4189a10038e6 | 240 | status = link.read(headerBuf, headerBufLen); |
yihui | 3:4189a10038e6 | 241 | if (2 > status) { |
yihui | 3:4189a10038e6 | 242 | return false; |
yihui | 3:4189a10038e6 | 243 | } |
yihui | 3:4189a10038e6 | 244 | |
yihui | 3:4189a10038e6 | 245 | type = getPType(headerBuf); |
yihui | 3:4189a10038e6 | 246 | if (PDU_RR == type) { |
yihui | 3:4189a10038e6 | 247 | break; |
yihui | 3:4189a10038e6 | 248 | } else if (PDU_SYMM == type) { |
yihui | 3:4189a10038e6 | 249 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 250 | return false; |
yihui | 3:4189a10038e6 | 251 | } |
yihui | 3:4189a10038e6 | 252 | } else { |
yihui | 3:4189a10038e6 | 253 | return false; |
yihui | 3:4189a10038e6 | 254 | } |
yihui | 3:4189a10038e6 | 255 | } while (1); |
yihui | 3:4189a10038e6 | 256 | |
yihui | 3:4189a10038e6 | 257 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 258 | return false; |
yihui | 3:4189a10038e6 | 259 | } |
yihui | 3:4189a10038e6 | 260 | |
yihui | 3:4189a10038e6 | 261 | return true; |
yihui | 3:4189a10038e6 | 262 | } |
yihui | 3:4189a10038e6 | 263 | |
yihui | 3:4189a10038e6 | 264 | int16_t LLCP::read(uint8_t *buf, uint8_t length) |
yihui | 3:4189a10038e6 | 265 | { |
yihui | 3:4189a10038e6 | 266 | uint8_t type; |
yihui | 3:4189a10038e6 | 267 | uint16_t status; |
yihui | 3:4189a10038e6 | 268 | |
yihui | 3:4189a10038e6 | 269 | // Get INFO PDU |
yihui | 3:4189a10038e6 | 270 | do { |
yihui | 3:4189a10038e6 | 271 | status = link.read(buf, length); |
yihui | 3:4189a10038e6 | 272 | if (2 > status) { |
yihui | 3:4189a10038e6 | 273 | return -1; |
yihui | 3:4189a10038e6 | 274 | } |
yihui | 3:4189a10038e6 | 275 | |
yihui | 3:4189a10038e6 | 276 | type = getPType(buf); |
yihui | 3:4189a10038e6 | 277 | if (PDU_I == type) { |
yihui | 3:4189a10038e6 | 278 | break; |
yihui | 3:4189a10038e6 | 279 | } else if (PDU_SYMM == type) { |
yihui | 3:4189a10038e6 | 280 | if (!link.write(SYMM_PDU, sizeof(SYMM_PDU))) { |
yihui | 3:4189a10038e6 | 281 | return -2; |
yihui | 3:4189a10038e6 | 282 | } |
yihui | 3:4189a10038e6 | 283 | } else { |
yihui | 3:4189a10038e6 | 284 | return -3; |
yihui | 3:4189a10038e6 | 285 | } |
yihui | 3:4189a10038e6 | 286 | |
yihui | 3:4189a10038e6 | 287 | } while (1); |
yihui | 3:4189a10038e6 | 288 | |
yihui | 3:4189a10038e6 | 289 | uint8_t len = status - 3; |
yihui | 3:4189a10038e6 | 290 | ssap = getDSAP(buf); |
yihui | 3:4189a10038e6 | 291 | dsap = getSSAP(buf); |
yihui | 3:4189a10038e6 | 292 | |
yihui | 3:4189a10038e6 | 293 | headerBuf[0] = (dsap << 2) + (PDU_RR >> 2); |
yihui | 3:4189a10038e6 | 294 | headerBuf[1] = ((PDU_RR & 0x3) << 6) + ssap; |
yihui | 3:4189a10038e6 | 295 | headerBuf[2] = (buf[2] >> 4) + 1; |
yihui | 3:4189a10038e6 | 296 | if (!link.write(headerBuf, 3)) { |
yihui | 3:4189a10038e6 | 297 | return -2; |
yihui | 3:4189a10038e6 | 298 | } |
yihui | 3:4189a10038e6 | 299 | |
yihui | 3:4189a10038e6 | 300 | for (uint8_t i = 0; i < len; i++) { |
yihui | 3:4189a10038e6 | 301 | buf[i] = buf[i + 3]; |
yihui | 3:4189a10038e6 | 302 | } |
yihui | 3:4189a10038e6 | 303 | |
yihui | 3:4189a10038e6 | 304 | nr++; |
yihui | 3:4189a10038e6 | 305 | |
yihui | 3:4189a10038e6 | 306 | return len; |
yihui | 3:4189a10038e6 | 307 | } |