CC2520 and preamble

Rui Pedro Caldeira

Hello guys, I'm just wondering, is there any way to remove the sending of the preamble when sending data to the medium. Everything I've seen just instructs me to reduce the number of preamble symbols to a minimum of two.

Best Regards,
Rui

over 9 years ago

0 Rui Pedro Caldeira over 9 years ago

Prodigy 30 points

Does the TXFIFO infinite loop mode remove the preamble?

0 TheDarkSide over 9 years ago in reply to Rui Pedro Caldeira

TI__Genius 16570 points

Hi,

sorry for the delay of the answer.

Yes basically if you set FRMCTRL0.TX_MODE[1:0] to '11', then you have infinite modulated pseudo-random data streamed out, OQPSK modulated, with no preamble.

Please also note preamble length can also be set to values from 2 to 17 bytes, using the register MDMCTRL0.PREAMBLE_LENGTH [3:0] fields.

Typically 2.4 Ghz OQPSK modulation uses 4 bytes for PREAMBLE.

Hope this clears it out.

Thanks,

TheDarkSide

0 Rui Pedro Caldeira over 9 years ago in reply to TheDarkSide

Prodigy 30 points

Hey! Thanks for the answer. I've found out in this forum the thing I was looking for, and it goes a little on the lines you've said but has more to it (http://e2e.ti.com/support/wireless_connectivity/f/158/p/356756/1263532.aspx).

Thanks one more time, and best regards,
Rui

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CC2520 and preamble