IWRL6432: IWRL6432

JAE HYEON BAE

Part Number: IWRL6432

Tool/software:

Hi TI experts,

In dpc.c at line 2617 of the vital signs in radar toolbox 2.3.0.12

vsRangeBin = (uint16_t)(radialDistance / 0.093);
vsBaseAddr = (uint32_t)gMmwMssMCB.radarCube[0].data;
vsBaseAddr = vsBaseAddr + (vsRangeBin * 4) - 8;

what means is this line..
vsBaseAddr = vsBaseAddr + (vsRangeBin * 4) - 8;

i want understand that code.. '(vsRangeBin * 4) - 8'

why do move address?

Best regards,

7 months ago

0 Josh Dye 7 months ago

TI__Mastermind 20901 points

Hi,

We are looking into your question. Please give us a day or so to get back to you with a response.

Thanks,

Josh

0 Abhishek Karkisaval 7 months ago in reply to Josh Dye

TI__Genius 11750 points

Hi,

For Vital signs, range fft output for 1 chirp in every frame at the tracker centroid is used as input to vitals signs chain. vsRangeBin provides the fft range bin corresponding to the location of tracker. Range fft output(16 bit I, 16 bit Q) at that location forms 1 sample for Vital signs chain. Similarly, 128 samples are used for vital signs chain for phase determination

Regards

0 JAE HYEON BAE 7 months ago in reply to Abhishek Karkisaval

Prodigy 20 points

Hi,

thanks for your answer

i'm not understand .. constant number that code. 4 and 8

'(vsRangeBin * 4) - 8'

is this code for calculate Range Bin Index in radar cube address?

4 is maybe.. means 4byte

becouse '(uint32_t)gMmwMssMCB.radarCube[0].data;'

8 is i don't know..

4 is right? what is 8 ?

pls answer me.

+1 Abhishek Karkisaval 7 months ago in reply to JAE HYEON BAE

TI__Genius 11750 points

Yes, that is correct, 4 and 8 are for number of bytes to find the range bin index

Regards

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IWRL6432: IWRL6432