switch from Synchronous Serial Mode to Random Mode.

Shimon Shamsiyan

Other Parts Discussed in Thread: CC1121

Hi All,

I'm working on the CC1121 chip and trying to switch from Synchronous Serial Mode to Random Mode and I'm doing the followings but it stays on Synchronous Serial Mode:

Sending the Command Strobe SIDLE.
Changing the following registers:
Register: 0x2F91 to 0x00,
Register: 0x26 to 0x06,
Register: 0x28 to 0x40,
Register: 0x12 to 0x46.

And than I'm output transmitting.

But when I'm looking on the Spectrum Analyzer, I see that it remained on Synchronous Serial Mode, Moreover when I read those address I see that they on the required values.

Any Ideas???

Thanks,

Shimon.

over 9 years ago

0 Shimon Shamsiyan over 9 years ago

Intellectual 630 points

Moreover,

Beside of the above registers I've also configured the:
Register: 0x0E to 0x00.

Waiting,
Shimon.

0 Shimon Shamsiyan over 9 years ago in reply to Shimon Shamsiyan

Intellectual 630 points

Sorry for the above mistake:
Register 0x1E to 0x00 and not Register: 0x0E to 0x00.

0 Shimon Shamsiyan over 9 years ago in reply to Shimon Shamsiyan

Intellectual 630 points

Moreover, I've saw the following change on the following registers:

Register: 0x2B to 0x5D.
Register: 0x2F23 to 0x10.
But it haven't changed the output signal... :-(

Waiting,
Shimon.

0 TER over 9 years ago in reply to Shimon Shamsiyan

TI__Guru**** 317180 points

Try to write one byte to the TXFIFO, I believe the chip sends preamble before something is in the FIFO.

0 Shimon Shamsiyan over 9 years ago in reply to TER

Intellectual 630 points

Hi all,

Thanks a lot for the reply.
There isn't any progress after the writing to the TXFIFO.

Waiting,

Shimon.

0 TER over 9 years ago in reply to Shimon Shamsiyan

TI__Guru**** 317180 points

I did the following using SmartRF Studio using RF device commands:
Set the chip to use serial mode,
Sending the Command Strobe SIDLE.
Changing the following registers:
Register: 0x2F91 to 0x00,
Register: 0x26 to 0x06,
Register: 0x28 to 0x40,
Register: 0x12 to 0x46

Wrote one byte to the TXFIFO, strobed STX. Then the chip is sending random data. Not sure why you don't get it to work.

0 Shimon Shamsiyan over 9 years ago in reply to TER

Intellectual 630 points

Hi All,

I've did all of the above but...:-(
There seems to be more register configuration that ought to be beside those that you've sent that they done the CPU on the TrxEB that I need to know.
The above registers are part of them.
I'll be happy if someone will check it on other board beside the above.

Thanks,

Shimon.

Sub-1 GHz

Sub-1 GHz forum

switch from Synchronous Serial Mode to Random Mode.