• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 54 subscribers
  • Views 793 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SmartRF Studio Command Strobe

Arun Raghunathan
Prodigy 110 points
Other Parts Discussed in Thread: CC1120

Hello,

I am using the CC112x eval kit and was going through the tutorials for the SmartRF studio about the command strobe panel. My problem is I have followed all the steps listed in the tutorial (Chapter 5) but I cannot seem to receive any packets on the RX side. There is no change in LOCK_STATUS button (should it turn green after pressing the Pkt RX button?) and the unit is always in the RX mode. Are there any other steps that need to be executed for CC1120 that are different from what is given for CC1110 in the document?

Thanks,

Arun

  • 0
    TI__Genius 12900 points

    Hi,

    In exercise 5 of  the SmartRF Studio tutorial, you must for CC1120 do a calibration (SCAL strobe) prior to strobing either SRX (Enter RX mode) or STX (enter TX mode).

    RX (Command strobe panel active):

    1. Select typical setting
    2. Press "Pkt Rx" button to set correct registers
    3. Press "SCAL"
    4. Press SRX and observe that LOCK_STATUS turns green

    TX (Command strobe panel active):

    1. Select typical setting
    2. Press "Pkt Tx" button to set correct registers
    3. Press "SCAL"
    4. Write something to fifo (first byte is length byte, or you simply check off "Insert length")
    5. Press "STX"

    After pressing "STX", the RX LOCK_STATUS should be turned off and you can read the RX FIFO content by pressing "Read RX FIFO" button.

    Br,
    ABO 

    For reference: SmartRF Studio 7 tutorial (swru194)

    --
    PS. Thank you for clicking  Verify Answer  below if this answered your question!

  • 0 in reply to TIABO
    Prodigy 110 points

    Thanks ABO! That did the trick!

    So should I be performing a calibration everytime I move CC1120 into RX/TX mode from idle?

     

    Regards,

    Arun

  • 0 in reply to Arun Raghunathan
    TI__Genius 12900 points

    Good to hear!

    The manual calibration is a bug in version 2.1 of the CC1120 chip. See the errata for details: http://www.ti.com/lit/swrz039

    You should always do the calibration before starting RX or TX. That said, I believe the cap array values you get after a calibration should hold for consequent IDLE -> RX/TX as long as the temperature does not drift several degrees.

    Br,
    ABO