IWR1642BOOST: Lower duty cycle of chirps/measurements

Shaun Houlihan10

Part Number: IWR1642BOOST
Other Parts Discussed in Thread: IWR1642

I'm running the High Accuracy lab for the IWR1642. I notice that as programmed, measurement readings are taken and transmitted about every second or so. Is there a way to lower the duty cycle of measurements - for instance only sending out a chirp and calculating a distance every 5 seconds? I can't seem to find where in the API this would be handled.

over 7 years ago

0 Shaun Houlihan10 over 7 years ago

Prodigy 170 points

I was looking at the parameter framePeriodicity but this apparently only ranges from 1 to 1000 ms.

0 Michelle Liu over 7 years ago in reply to Shaun Houlihan10

TI__Genius 11405 points

Hi Shaun,

The high accuracy lab 16xx has 10 chirps accumulated for the peak search and frame period is by default 0.5Sec. You can increase to about 1.4Sec, but not higher.

Can you give more information on why needing lower duty cycle? Do you need to have it measure every 5 seconds? or it can measure every 1 sec but output data every 5 seconds?

Let me know. Thanks!

Regards,

Michelle

0 Shaun Houlihan10 over 7 years ago in reply to Michelle Liu

Prodigy 170 points

Trying to limit power use. I guess the way to do this then would be to send the sensorStart and sensorStop commands repeatedly at intervals?

0 Michelle Liu over 7 years ago in reply to Shaun Houlihan10

TI__Genius 11405 points

Hi Shaun,

SensorStart/stop will be a good idea to save power. The problem is that the high accuracy 16xx lab does not support sensorStart/Stop. You will need to modify that part, a reference is the out-of-box mmw demo for 16xx.

Regards,

Michelle

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IWR1642BOOST: Lower duty cycle of chirps/measurements