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Original question:

CC2340R5-Q1: How can we ensure the MCU is in standby mode in application firmware

CC2340R2: How to turn on BLE again after shut down cc2340

NancyChou
Prodigy 20 points
Part Number: CC2340R2


Tool/software:

Hi Experts,

I'm using cc2340R22 and trying to do power saving.

After being shut down, everything is ok, but when I power on again and PowerLPF3_releaseLatches(), I couldn't see the BLE advertising.

Anything I should do wake up RF?

Thanks in advanced.

WenSan

  • 0
    TI__Expert 4730 points

    Hello,

    Thanks for reaching out! That is unusual behavior, as it shouldn't stop advertising unless specified so. I have a few questions:

    Are you using any of the examples from the SDK?

    What SDK version are you using?

    How are you verifying that the device is not advertising?

    Best Regards,

    Tarek

  • 0 in reply to Tarek D
    Prodigy 20 points

    Hi Tarek
    I'm using basic_ble of simplelink_lowpower_f3_sdk_8_20_00_119.
    Before shut down, BLEAppUtil_advStop was called, and power on again and PowerLPF3_releaseLatches(), BLEAppUtil_advStart() was called. However, I didn't see any bevice name from APP .

    With the same steps, entering standby mode and then back, it's ok.  

  • 0 in reply to NancyChou
    TI__Expert 4730 points

    Hello,

    I'm looking into this. In the mean time, is this also seen on the newest SDK?

    Best Regards,

    Tarek

  • 0 in reply to NancyChou
    TI__Expert 4730 points

    Hello,

    Could you also provide any changes you have made to the default example? And as mentioned, if you could test it on the newest SDK, that will make the process of pinpointing the issue much easier.

    Best Regards,

    Tarek

  • 0 in reply to Tarek D
    Prodigy 20 points

    Hi Tarek，
    Sorry for late， after several days check, I finally found it is my control ussue.
    In my design there is one power on/off key to switch on and off.
    When switch off, CC2340 was shut down and then triggered by key to switch on.
    After switch on, I issue BLEAppUtil_advStart() to start BLE.
    However, the BLE stack is not ready at very begining.
    I should wait till BLE was initialized down.

    Thanks for your reply.:)

     Nancy