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CC3200 initialization takes very long

Martin Bor
Prodigy 60 points
Other Parts Discussed in Thread: CC3200-LAUNCHXL, CC3200, MSP-EXP430F5529LP, CC3100

When calling sl_Start, it takes about 7899 ms (258,845 slow clock cycles) before the call returns. From the SDK release notes I expect it to take at most 250 ms for pre-production silicon. I'm using a CC3200-LaunchXL rev 3.2 with SDK 0.5.2 and the latest service pack (v0.5.2). The versions reported by the device are as follows:

ChipID 50331667

MAC 31.0.0.4.1

PHY 1.5.3.1

NWP 2.0.7.0

ROM 8738

HOST 0.0.5.1

I've attached a CCS project that demonstrates the problem. Is there something I'm missing, or maybe a bug in the SDK?

boot.zip
  • 0
    TI__Expert 7215 points

    Hi Martin,

    Can you confirm below

    1) Reset the CC3200 Launch Pad

    2) Run your application

    Is the result same?

    We will also check at our end.

    Regards,

    Kaushal

  • 0 in reply to Kaushal Kukkar
    Prodigy 60 points

    Do you mean reset the launchpad by pressing the RESET (SW1) button? I tried this, and the result is the same. I also tried it with another Launchpad, fresh out of the box (also rev 3.2, but without the 0.5.2 service pack applied) and it had the same problem. I did notice that if you unplug and replug the Launchpad, on the first run it takes 1385 ms for sl_Start to return. After this it takes about 7500 ms for every run. I also reformatted the Launchpad and reflashed the service pack, but the result is the same. I also flashed the application to the flash and ran it from there, but the result is the same. 

  • 0 in reply to Martin Bor
    TI__Expert 7215 points

    Hi Martin,

    we ran your code here and found the sl_start to take about 1300-1400msec. But this time doesn't change much. We couldn't reproduce 7500msec delay.

    Let us know if we might be missing any steps to reproduce this issue. 

  • 0 in reply to Kaushal Kukkar
    Prodigy 60 points

    Hi Kaushal,

    The first run after a power cycle (unplug and replug) also takes about 1300-1400 ms. Each subsequent run however takes 7-9 seconds. I rerun the program via CCS by terminating the debug session (Run > Terminate) and start a new debug session (Run > Debug).

    Still, 1300-1400 ms is far from the specified 250 ms (see CC3200 SDK 0.5.2 Release Notes, section 10.7). I want to use the CC3200 in an ultra-low power application, and therefore minimize the wake-up latency. Is this something that is going to be improved with new releases of the SDK and service packs?

  • 0 in reply to Martin Bor
    Prodigy 60 points

    I noticed a new service pack was released recently (v0.5.0.1), but it didn't improve the startup time. I also tried to run similar code on a CC3100 paired with an MSP-EXP430F5529LP, and the startup times are much better, around 350 ms.

    Is there a service pack in the works which will improve the startup time, or do we have to wait for the production silicon?