snep.h

00001 
00002 
00003 #ifndef __SNEP_H__
00004 #define __SNEP_H__
00005 
00006 #include "llcp.h"
00007 
00008 #define SNEP_DEFAULT_VERSION    0x10    // Major: 1, Minor: 0
00009 
00010 #define SNEP_REQUEST_PUT        0x02
00011 #define SNEP_REQUEST_GET        0x01
00012 
00013 #define SNEP_RESPONSE_SUCCESS   0x81
00014 #define SNEP_RESPONSE_REJECT    0xFF
00015 
00016 class SNEP {
00017 public:
00018     SNEP(PN532Interface &interface) : llcp(interface) {
00019         headerBuf = llcp.getHeaderBuffer(&headerBufLen);
00020     };
00021 
00022     /**
00023     * @brief    write a SNEP packet, the packet should be less than (255 - 2 - 3) bytes
00024     * @param    buf     the buffer to contain the packet
00025     * @param    len     lenght of the buffer
00026     * @param    timeout max time to wait, 0 means no timeout
00027     * @return   >0      success
00028     *           =0      timeout
00029     *           <0      failed
00030     */
00031     int8_t write(const uint8_t *buf, uint8_t len, uint16_t timeout = 0);
00032 
00033     /**
00034     * @brief    read a SNEP packet, the packet will be less than (255 - 2 - 3) bytes
00035     * @param    buf     the buffer to contain the packet
00036     * @param    len     lenght of the buffer
00037     * @param    timeout max time to wait, 0 means no timeout
00038     * @return   >=0     length of the packet 
00039     *           <0      failed
00040     */
00041     int16_t read(uint8_t *buf, uint8_t len, uint16_t timeout = 0);
00042 
00043 private:
00044     LLCP llcp;
00045     uint8_t *headerBuf;
00046     uint8_t headerBufLen;
00047 };
00048 
00049 #endif // __SNEP_H__