1a2e5ee4
 henyxia
Big revision
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#ifndef __LLCP_H__
#define __LLCP_H__
#include "mac_link.h"
#define LLCP_DEFAULT_TIMEOUT 20000
#define LLCP_DEFAULT_DSAP 0x04
#define LLCP_DEFAULT_SSAP 0x20
class LLCP {
public:
LLCP(PN532Interface &interface) : link(interface) {
headerBuf = link.getHeaderBuffer(&headerBufLen);
ns = 0;
nr = 0;
};
/**
* @brief Actiave PN532 as a target
* @param timeout max time to wait, 0 means no timeout
* @return > 0 success
* = 0 timeout
* < 0 failed
*/
int8_t activate(uint16_t timeout = 0);
int8_t waitForConnection(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
int8_t waitForDisconnection(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
int8_t connect(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
int8_t disconnect(uint16_t timeout = LLCP_DEFAULT_TIMEOUT);
/**
* @brief write a packet, the packet should be less than (255 - 2) bytes
* @param header packet header
* @param hlen length of header
* @param body packet body
* @param blen length of body
* @return true success
* false failed
*/
bool write(const uint8_t *header, uint8_t hlen, const uint8_t *body = 0, uint8_t blen = 0);
/**
* @brief read a packet, the packet will be less than (255 - 2) bytes
* @param buf the buffer to contain the packet
* @param len lenght of the buffer
* @return >=0 length of the packet
* <0 failed
*/
int16_t read(uint8_t *buf, uint8_t len);
uint8_t *getHeaderBuffer(uint8_t *len) {
uint8_t *buf = link.getHeaderBuffer(len);
len -= 3; // I PDU header has 3 bytes
return buf;
};
private:
MACLink link;
uint8_t mode;
uint8_t ssap;
uint8_t dsap;
uint8_t *headerBuf;
uint8_t headerBufLen;
uint8_t ns; // Number of I PDU Sent
uint8_t nr; // Number of I PDU Received
static uint8_t SYMM_PDU[2];
};
#endif // __LLCP_H__
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