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CCS/CC1312R: Sysconfig/CC1312R : How to configure 500 kbps datarate?

Jan Ingwer Baer
Expert 1205 points
Part Number: CC1312R
Other Parts Discussed in Thread: CC1310, , SYSCONFIG

Tool/software: Code Composer Studio

I try to move my growing project from CC1310 to CC1312.

The Sysconfig-tool is nice, but if i try to configure a datarate of 500 kbps i get an error. Configuring in SmartRF Studio works.

Is there any solution to use the 500 kbps with CC1312R?

And how to combine SmartRF Studio configuration with Sysconfig?

  • 0
    TI__Guru**** 317180 points

    I could not find out we the limit is set to 200 but it's easy to change. If you go to your installation of CCS:

    C:\ti\simplelink_cc13x2_26x2_sdk_3_30_00_81\source\ti\radioconfig\.meta\settings\prop.syscfg.js and open prop.syscfg.js and go to line 368 and change 200 to 500 (restart CCS for changes to take place) you should be able to type in 500 kbps. 
    Which other parameters do you need to set?
    Note that we haven't started looking at 500 kbps for CC13x2 so we don't have any optimal settings here. 
  • 0 in reply to TER
    Expert 1205 points

    Thank you for your fast answer. I have just another question about difference of CC1310 vs CC1312R

    With symbolrate set to 500kBaud i get different values for rateword and prescaler on CC1312R vs CC1310 :

    CC1310 : rateword=0x20000, prescaler=0x6 -> 500kbaud

    CC1312 : rateword=0x50000, prescaler=0xf -> 500kbaud

    What are the pros and cons for different equivalent combinations of rateword and prescaler?

  • 0 in reply to Jan Ingwer Baer
    TI__Guru**** 317180 points

    The engineer that could potentially answer the question is out for a few days. From what I could understand from the information I have received so far is that it could be somewhat dependent on if 24 MHz (radio core on CC1310)/ 48 MHz (RF core on C1312) and if that is a integer function of the rate or not. But for now, stay with the settings from SmartRF Studio for these parameters. 

    Note that you need to do some measurements to see if you have the optimal value for AGC reference.