Hello, Daniel;
What i can tell you (don't take this as exact, i'm an amateur) is that the
message_t contains within the CTP data field, inside of which there is the
actual data payload you desire (check TEP 123, point 4), all up to a maximum
of
TOSH_DATA_LENGTH. Up to, because you can have less, data_length is
just a limit to be filled, the actual payload size is set in the Frame
Length byte, as defined in the cc2420 header:
typedef nx_struct cc2420_header_t {
nxle_uint8_t length; ««« here's the payload length, which starts counting
in the "type" byte down there
nxle_uint16_t fcf;
nxle_uint8_t dsn;
nxle_uint16_t destpan;
nxle_uint16_t dest;
nxle_uint16_t src;
nxle_uint8_t type; « this byte here is already part of the payload as is
considered in the length above
cc2420_header_t;
hope this is any help
regards
Pedro
On 7/10/07, Daniel Widyanto <[EMAIL PROTECTED]> wrote:
Hi all,
I just want to ask about the package frame.
Based on TEP111 about message_t, the message_t's
data length is defined by TOSH_DATA_LENGTH.
Is the CTP's data frame (in TEP123 section 4) taking
message_t's data field ? Or is the message_t is
inside the CTP's data field ?
Just a bit confuse
Thanks
Regards,
-daniel
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