• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 317 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.

MMWCAS-RF-EVM: Triggering a pulse after the first chirp/frame is fired

Gabriel Gan
Prodigy 85 points
Part Number: MMWCAS-RF-EVM


Hi there,

I am currently using the MMWCAS-RF-EVM along with the MMWCAS-DSP-EVM. I was wondering if it was possible to somehow trigger a signal or a pulse of some sort (perhaps through the GPIOs)  right after the first chirp/frame is fired. Could this be done in the GUI or with LUA scripts?  The reason is for SAR imaging, as the chirp pulses need to be timestamped with the INS.

Your help is much appreciated.

Gabriel Gan

  • 0
    TI__Genius 13805 points

    Hi Gabriel,

                     You can configure the mmWave devices in hardware trigger mode and on your application on TDA(or Host) you can have that controlled/indicated as you desire.

    Regards

  • 0 in reply to Abhed Misra
    Prodigy 85 points

    Hi Abhed, 

    I believe there is a misunderstanding. I am kindly asking if it is possible for the system (MMWCAS-RF-EVM with MMWCAS-DSP-EVM) through any GUI or LUA script configuration to OUTPUT a signal/pulse through the GPIO upon the firing of the FIRST chirp pulse or frame. This is NOT the same as controlling the triggering of the system via an external pulse.

    Reason being is that i have an inertial navigation system (INS) that continuously outputs GPS data. I need to timestamp each GPS data with the corresponding chirp pulses and to do that, I need a reference. Hence, after the system fires the first chirp, it would be ideal if it can send out a pulse, which would then trigger a flag on the INS and this would act as my reference.

    Your help is much appreciated. Thank You
    Gabriel Gan 

  • 0 in reply to Gabriel Gan
    TI__Genius 13805 points

    Hi Gabriel,

                   Based on your explanation, you want an indication of the frame start or per chirp(ADC_VALID), on a GPIO, which you would be feeding to your a HOST in INS system. May i know how you are querying the data from RADAR system? I am suggesting few things below.

    1. The CSI2 communication also have a Frame Start signal

    ...

    2. The primary device feeds DIG_SYNC to secondary devices through buffer. You can have that also being taken as an indication of frame start.

    3. You can configure the register of GPIO_0 to bring out ADC_VALID signal and use it. Please refer the link below for more details.

    https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/685983/awr1243-api-for-adc-valid