In order to comunicate tos1 with tos2 via radio we had modifyed the TOS_Msg
structure adding an extra field we called src and moving the fields type and
group like:
typedef struct TOS_Msg
{
/* The following fields are transmitted/received on the radio. */
uint8_t length;
uint8_t fcfhi;
uint8_t fcflo;
uint8_t dsn;
uint16_t destpan;
uint16_t addr;
* uint16_t src;
uint8_t group;*
* uint8_t type;*
int8_t data[TOSH_DATA_LENGTH];
/* The following fields are not actually transmitted or received
* on the radio! They are used for internal accounting only.
* The reason they are in this structure is that the AM interface
* requires them to be part of the TOS_Msg that is passed to
* send/receive operations.
*/
uint8_t strength;
uint8_t lqi;
bool crc;
bool ack;
uint16_t time;
} __attribute((packed)) TOS_Msg;
Following the 802.15.4 standard you also have to modify the values of de fcf
fields, for example, in the .../tos/lib/cc2420Radio/cc2420Const.h file:
define CC2420_DEF_FCF_LO 0x88
#define CC2420_DEF_FCF_HI 0x41
#define CC2420_DEF_FCF_HI_ACK 0x61
I wonder if these tips will we helpful.
Jordi
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