Seeed / PN532

PN532 NFC library for Seeed Studio's NFC Shield

Fork of PN532 by Yihui Xiong

llcp.h@3:4189a10038e6, 2013-11-21 (annotated)

Committer:
yihui
Date:
Thu Nov 21 04:30:49 2013 +0000
Revision:
3:4189a10038e6
Child:
6:418ee8924317
sync with https://github.com/Seeed-Studio/PN532/releases/tag/v0.9.

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