Seeed / PN532

PN532 NFC library for Seeed Studio's NFC Shield

Fork of PN532 by Yihui Xiong

llcp.h@9:85bfede025da, 2015-02-04 (annotated)

Committer:
r4z0r7o3
Date:
Wed Feb 04 16:24:30 2015 +0000
Revision:
9:85bfede025da
Parent:
6:418ee8924317 
Fixed missing return statement

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 3:4189a10038e6 1
yihui 3:4189a10038e6 2 #ifndef __LLCP_H__
yihui 3:4189a10038e6 3 #define __LLCP_H__
yihui 3:4189a10038e6 4
yihui 3:4189a10038e6 5 #include "mac_link.h"
yihui 3:4189a10038e6 6
yihui 3:4189a10038e6 7 #define LLCP_DEFAULT_TIMEOUT 20000
yihui 3:4189a10038e6 8 #define LLCP_DEFAULT_DSAP 0x04
yihui 3:4189a10038e6 9 #define LLCP_DEFAULT_SSAP 0x20
yihui 3:4189a10038e6 10
screamer 6:418ee8924317 11 /**
screamer 6:418ee8924317 12 * The LLCP class
screamer 6:418ee8924317 13 */
yihui 3:4189a10038e6 14 class LLCP {
yihui 3:4189a10038e6 15 public:
yihui 3:4189a10038e6 16 LLCP(PN532Interface &interface) : link(interface) {
yihui 3:4189a10038e6 17 headerBuf = link.getHeaderBuffer(&headerBufLen);
yihui 3:4189a10038e6 18 ns = 0;
yihui 3:4189a10038e6 19 nr = 0;
yihui 3:4189a10038e6 20 };
yihui 3:4189a10038e6 21
yihui 3:4189a10038e6 22 /**
screamer 6:418ee8924317 23 * @brief Actiave PN532 as a target
screamer 6:418ee8924317 24 * @param timeout max time to wait, 0 means no timeout
screamer 6:418ee8924317 25 * @return > 0 success
screamer 6:418ee8924317 26 * = 0 timeout
screamer 6:418ee8924317 27 * < 0 failed
screamer 6:418ee8924317 28 */
yihui 3:4189a10038e6 29 int8_t activate(uint16_t timeout = 0);
yihui 3:4189a10038e6 30
yihui 3:4189a10038e6 31 int8_t waitForConnection(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
yihui 3:4189a10038e6 32
yihui 3:4189a10038e6 33 int8_t waitForDisconnection(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
yihui 3:4189a10038e6 34
yihui 3:4189a10038e6 35 int8_t connect(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
yihui 3:4189a10038e6 36
yihui 3:4189a10038e6 37 int8_t disconnect(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
yihui 3:4189a10038e6 38
yihui 3:4189a10038e6 39 /**
screamer 6:418ee8924317 40 * @brief write a packet, the packet should be less than (255 - 2) bytes
screamer 6:418ee8924317 41 * @param header packet header
screamer 6:418ee8924317 42 * @param hlen length of header
screamer 6:418ee8924317 43 * @param body packet body
screamer 6:418ee8924317 44 * @param blen length of body
screamer 6:418ee8924317 45 * @return true success
screamer 6:418ee8924317 46 * false failed
screamer 6:418ee8924317 47 */
yihui 3:4189a10038e6 48 bool write(const uint8_t *header, uint8_t hlen, const uint8_t *body = 0, uint8_t blen = 0);
yihui 3:4189a10038e6 49
yihui 3:4189a10038e6 50 /**
screamer 6:418ee8924317 51 * @brief read a packet, the packet will be less than (255 - 2) bytes
screamer 6:418ee8924317 52 * @param buf the buffer to contain the packet
screamer 6:418ee8924317 53 * @param len lenght of the buffer
screamer 6:418ee8924317 54 * @return >=0 length of the packet
screamer 6:418ee8924317 55 * <0 failed
screamer 6:418ee8924317 56 */
yihui 3:4189a10038e6 57 int16_t read(uint8_t *buf, uint8_t len);
yihui 3:4189a10038e6 58
yihui 3:4189a10038e6 59 uint8_t *getHeaderBuffer(uint8_t *len) {
yihui 3:4189a10038e6 60 uint8_t *buf = link.getHeaderBuffer(len);
yihui 3:4189a10038e6 61 len -= 3; // I PDU header has 3 bytes
yihui 3:4189a10038e6 62 return buf;
yihui 3:4189a10038e6 63 };
yihui 3:4189a10038e6 64
yihui 3:4189a10038e6 65 private:
yihui 3:4189a10038e6 66 MACLink link;
yihui 3:4189a10038e6 67 uint8_t ssap;
yihui 3:4189a10038e6 68 uint8_t dsap;
yihui 3:4189a10038e6 69 uint8_t *headerBuf;
yihui 3:4189a10038e6 70 uint8_t headerBufLen;
yihui 3:4189a10038e6 71 uint8_t ns; // Number of I PDU Sent
yihui 3:4189a10038e6 72 uint8_t nr; // Number of I PDU Received
yihui 3:4189a10038e6 73
yihui 3:4189a10038e6 74 static uint8_t SYMM_PDU[2];
yihui 3:4189a10038e6 75 };
yihui 3:4189a10038e6 76
yihui 3:4189a10038e6 77 #endif // __LLCP_H__