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Original question:

CC2652RB: SmartRF Studio does not set the correct frequency for CC2652RB

CC2652RB: SmartRF Studio uses incorrect clock source for CC2652RB

Shuyang Zhong
Expert 4920 points
Part Number: CC2652RB
Other Parts Discussed in Thread: SYSCONFIG, CC2652R

As the related post described, SmartRF Studio seems to use the wrong clock for CC2652RB, leading to a unexpected large frequency shift in continuous Tx mode.

Sorry for the delay to provide the screenshot for the test, I just found the issue remains in the latest SmartRF Studio 2.30.0.

Here's the screenshots from SmartRF Studio and BTool + host_test running on a CC2652RB LaunchPad, the target frequency is 2440MHz.

SmartRF Studio:

BTool + host_test:

Please help pass this issue to the tool's team, thanks!

Best regards,

Shuyang

  • 0
    TI__Guru**** 219417 points

    Hi Shuyang,

    As far as I am aware, the previous investigation only determined that SmartRF Studio 7 does not support stack or app custom overrides (BLE for instance) which are available SysConfig for SDK projects.  I am following up with the Tools team to determine whether anything can be done to remedy the behavior you are observing in Smart RF Studio.

    Edit: This is being further investigated internally.  The screenshots are of great assistance as they allow the Tools team to try and recreate the observation.

    Regards,
    Ryan

  • 0
    TI__Guru**** 219417 points

    Hi Shuyang,

    The Tools Team has observed minor frequency offset, 100 kHz instead of 1 MHz.  Do you know if the results measured vary between different CC2652RB LaunchPads? 

    Regards,
    Ryan

  • 0
    TI__Guru**** 219417 points

    Shuyang,

    There is a feature in the RF driver to do temperature compensation on CC2652RB devices for the internal BAW/SIP SimpleLink packages.  This is not present or needed for other devices (such as the CC2652R).  The RF driver is not used by Smart RF Studio 7 as it uses a reduced feature to establish the radio and control RF commands.  This could make the difference between evaluating a CC2652RB and CC2652R between Smart RF Studio 7 and BLE5-Stack application firmware.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    TI__Expert 4920 points

    Hi Ryan,

    Thanks for confirming this, this is similar to what I have guessed. Is it possible to add the temperature compensation to SmartRF Studio to get an accurate frequency?

    BTW, I don't have a second CC2652RB LaunchPad for test, but my customer has seen similar behavior on his board, which also proves the assumption. Would you please help push the tools team to fix this? Thanks very much!

    Best regards,

    Shuyang

  • 0 in reply to Shuyang Zhong
    TI__Guru**** 219417 points

    I will contact you offline to further align.

    Regards,
    Ryan