Sense2GoL Implementing FMCW

[#1]

Hello,

I am trying to implement FMCW for Sense2GoL and I have trouble figuring out how to access DAC in order to give VCO different voltages with it. Which library to use and which pin should I control?
I have pretty much managed to launch the demo GUI provided, but that is about it. Any help would be appreciated!

-Kasper

[finketho]

Hi Kasper,

unfortunately with the Sense2GoL platform it is not possible to operate FMCW modulation for two reasons

1. Microcontroller used does not have a DAC to drive the ramp
2. The port for tuning voltages on the RADAR MMIC (VTUNE) currently is fixed by HW to the temperature output of the chip to keep the MMIC in CW mode. This one would be the one that needs to be driven by a DAC

Thus, to conclude Sense2GoL was developed as a Doppler Radar Chip. FMCW operation is not possible without HW changes.

Best regards,
Thomas

[User12375]

If you're interested in FMCW version of Sense2Go, look at the OPS241-B, https://omnipresense.com/product/ops241-b-short-range-fmcw-radar-sensor/.