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 /**
00017  * The SNEP class
00018  */
00019 class SNEP {
00020 public:
00021     SNEP(PN532Interface &interface) : llcp(interface) {
00022         headerBuf = llcp.getHeaderBuffer(&headerBufLen);
00023     };
00024 
00025     /**
00026      * @brief    write a SNEP packet, the packet should be less than (255 - 2 - 3) bytes
00027      * @param    buf     the buffer to contain the packet
00028      * @param    len     lenght of the buffer
00029      * @param    timeout max time to wait, 0 means no timeout
00030      * @return   >0      success
00031      *          =0      timeout
00032      *           <0      failed
00033      */
00034     int8_t write(const uint8_t *buf, uint8_t len, uint16_t timeout = 0);
00035 
00036     /**
00037      * @brief    read a SNEP packet, the packet will be less than (255 - 2 - 3) bytes
00038      * @param    buf     the buffer to contain the packet
00039      * @param    len     lenght of the buffer
00040      * @param    timeout max time to wait, 0 means no timeout
00041      * @return   >=0     length of the packet 
00042      *           <0      failed
00043      */
00044     int16_t read(uint8_t *buf, uint8_t len, uint16_t timeout = 0);
00045 
00046 private:
00047     LLCP llcp;
00048     uint8_t *headerBuf;
00049     uint8_t headerBufLen;
00050 };
00051 
00052 #endif // __SNEP_H__