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CC1312R: No communication between CC1310 and CC1312R

Viktor Varga
Prodigy 20 points
Part Number: CC1312R
Other Parts Discussed in Thread: CC1310

Dear Community,

Because CC1310 was out of stock I decided to switch to the CC1312R for a small batch which is an overkill and expensive for the purpose but at least was available.

I checked if there was any necessary modification and found that the only component is the 24MHz crystal which should be replaced with a 48MHz one.

I expected some minor modifications will be necessary in the firmware, but I failed at the very first step.

To try if everything is fine I launched Smart RF Studio with 2 instances of the new CC1312R connected. Everything went smooth, the boards could communicate with each other.

Then I tried one CC1310 and one CC1312R in pair and couldn't find any combination of settings where the two could communicate.

Is there anyone out there who can confirm if there is any chance to make it work or the product is not compatible.

Thanks

  • 0
    Guru 735455 points

    If you set frequency band and rf parameters to the same for both CC1310 and CC1312R on SmartRF Studio, I see no reason why they cannot communicate to each other.

  • +1 in reply to YiKai Chen
    TI__Guru**** 317180 points

    In cases where two boards of the same type are able to communicate with each other but board of two different types are not able to communicate: In most cases this is due to a frequency offset between the boards. 

    Do you have a spectrum analyzer? In that case, set the CC1310 based board and the CC1312R board to send a CW and measure the frequency (use RBW = 1 kHz or lower) 

    On the CC1312R board, do you use internal or external loadcaps for the 48 MHz xal? Is the load cap adjusted for the load the xtal is designed for? 

  • 0 in reply to TER
    Prodigy 20 points

    Thanks for all the information. There is no external load cap in the design.

    Then the only reasonable explanation is the frequency offset. Will check it with analyzer as you proposed.

  • 0 in reply to TER
    Prodigy 20 points

    Hi TER,

    You were right, the reason was the frequency offset. After tuning the new CC1312R it can communicate.

    Thanks again