SYNC_IN Hardware Trigger

Hello,

The hardware trigger should work. Can you share the electrical specifications and timing of the trigger you are using?

Regarding the PTP timing accuracy, I believe that ns accuracy could be achievable accroding to the below app note, but I will loop in someone more familiar to comment.

IEEE 1588 Precision Time Protocol Time Synchronization Performance (Rev. A)

Regards,

Adrian 

Hi,

I'm using an Arduino Uno in combination with a digital isolator to trigger the boards. The pulse is the same as for the AWR2243BOOST boards and has a duration of ~2us and 3.3V. I soldered the cable to one of the pads that are connected to AR_SYNCIN.

Regards,
Oliver

Hello, 

Can you confirm which point you soldered? Can you also try probing at the point below to confirm that the trigger is reaching the device?

REgards,

Adrian 

Hi Adrian,

Sure, I soldered it to the pad "2 LED_0", which can be seen in the picture below. It is connected to AR_SYNCIN with the 0 Ohm resistor R61. A measurement with an Oscilloscope confirms that the trigger signal reaches R17 with 3.2V and a pulse duration of 2.04us.

In MMWaveStudio, I only changed the parameters in the sensor configuration tab and chose "hardware trigger" in the frame config. Is that correct?

I also tried the subframe trigger, but that didn't work either.

I measured if the board was sending (to rule out any other errors (from the DCA1000, for example)). Anything works fine with the software trigger, but not with the hardware trigger.

Do I need to change anything on the board? I only attached the cable, the rest is still unchanged.

Regards,
Oliver

Hello,

There should be nothing else needed. I just want to confirm that you are issuing the AWR_FRAMESTARTSTOP_CONF_SB API? In HW trigger you still need to issue this API before sending the HW trigger.

If that is being done then I do not have any other ideas. I will need to check with the firmware team to make sure this feature is enabled.

Regards,

Adrian

Hi,

yes that should be invoked by the "Trigger Frame" button. Then, a message from the BSS with "Async Event XXX" is received, and the BSS should be waiting for the trigger pulse.

Ok thank you!

Regards,
Oliver

Hi,

is there any info from the firmware team?

BR Oliver

Hi,

Sorry for the delay somebody from our team will help you on this request.

Regards,

Sami

Hi Oliver,

You can achieve around 10ns accuracy with PTP sync.

Are you still facing issue with the HW trigger?

Regards,

Ajay

Yes, I am still trying to get it working with the hardware trigger. I know the board was not designed for this, but it should work, right? According to your colleague, my hardware setup is correct. The last thing I'm not sure about is the RadarSS, which I cannot modify or look into.

Any update?