[Tinyos-help] To send large payload in the TestSerial.

[Razvan Musaloiu-E.]

Hi!

On Tue, 3 Feb 2009, kiseop Lee wrote:

> Hello,
> How does the TestSerial send large payload datas to host-PC by RS-232 ?
>
> I have found that "TOSH_DATA_LENGTH 28" into CC2420.h file is used
> in Packet.maxPayloadLength().
> But I have modified it to 1300 and the test_serial_msg_t has a member array
> which is composed
> with 1200 bytes. Now, it does not operate.
>
> I want to send 1200bytes per second to Host-PC by RS-232 and RF.
> in this stage, I am testing only RS-232 and at next stage, I will send these
> by RF.
>
> Do you know this problem?
>

Bad news: you cannot make the payload that big. All the send/receive 
interfaces the type uint8_t for the length. Moreover, for C2420 the 
maximum value for TOSH_DATA_LENGTH cannot exceed 114 (or 115) bytes 
because the internal buffer of chip is 128 bytes (including the headers).

All the best!
Razvan ME