• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 30 subscribers
  • Views 361 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AWR2243BOOST: Synchronizing the frame with external processor

Patrick Rennich
Prodigy 20 points
Part Number: AWR2243BOOST
Other Parts Discussed in Thread: DCA1000EVM

Hello,

I'm working with the AWR2243BOOST evaluation board connected to a DCA1000EVM data capture card. I've successfully configured and collected data with the mmWave Studio 2G.

I'd now like to synchronize the start of each frame with a Raspberry Pi via the GPIO pins (3.3v). My plan was to use the rising edge of the SYNC_OUT signal which I thought would be available on Pin 18 of J5. An oscope reading on that pin shows that there is no signal available there and this is confirmed by other threads in this forum.

The synchronization doesn't have to be particularly precise. Something within 1 μsec would be great, but I can tolerate up to a couple hundred μsec.

Please let me know the best way to achieve this synchronization. Other posts in this forum have suggested remapping the MCUCLK OUT signal (Pin 5 of J6) as the SYNC_OUT signal. If this is the best way to achieve this synchronization, I'll need more help in how to actually implement that while using the mmWave Studio to collect data.

Thanks in advance for any and all help!

Patrick

  • 0
    TI__Guru 58035 points

    Hello Patrick,

    The best way to synchronize the frames to external processor is to use the HW triggered mode for the frames. In the frame config API there is an option of SW trigger and HW trigger, if you select te HW trigger mode each frame is transmitted at the pulse edge provided on the SYNC IN pin. This pin is brought out on pin 9 of the J5 connector. You can feed a ~1msec wide pulse from Raspberry pi on this pin for every frame at the rate you set in the frame periodicity.

    Regards,
    Vivek 

  • +1 in reply to Vivek Dham
    Prodigy 20 points

    Hello Vivek,

    Thanks for the suggestion! I hadn't thought of that. I'll try that.

    Are you able to say what kind of delay might be present between the rising edge of the HW trigger and the start of the frame?

    Thanks,

    Patrick