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?
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):
TX (Command strobe panel active):
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.
For reference: SmartRF Studio 7 tutorial (swru194)
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Thanks ABO! That did the trick!
So should I be performing a calibration everytime I move CC1120 into RX/TX mode from idle?
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.
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