IWR6843ISK-ODS: Calculating Values from DataFormat

max mannesse

Part Number: IWR6843ISK-ODS

Hello,

I'm using the IWR6843ISK-ODS sensor together with the People Counting demo Code to create a Human Fall Detection system.

At the moment i placed my own method in the mss_main.c file around line 680.

This is the spot that sends the Data Format to the GUI using the UART and my own code uses it because i want to use the GPIO_2 Led:

But i'm a little stuck at calculating the range of the object.

I decompress the values from the Data Format and multiply the Range with the Range Unit.

But i'm only getting wrong values.

Am i using the wrong calculation? Or do i use the wrong object code?

(I'm using the objOut variable from the gMmwMssMCB.pointCloudToUart because somehow the gMmwMssMCB.trackerOutput.tList[gMmwMssMCB.trackerOutput.currentDescr] variable that gets Written to the UART is empty when i try to use it.)

Regards,

Max

over 5 years ago

0 Justin Curewitz over 5 years ago

TI__Mastermind 28055 points

Hi Max,

First, are you running fall detection on the device? If so, you can intercept the points at the same location the tracker intercepts them. This is before they are compressed, and will save cycles because you don't have to do the decompression. Please get the data from the following location:

mss_main.c, line 1649. This is the function "Pcount3DDemo_handleObjectDetResult()". You can see around line 1680 the point cloud is copied to another buffer for the tracker, you can use this buffer after the tracker runs.

Regards,

Justin

0 max mannesse over 5 years ago in reply to Justin Curewitz

Intellectual 340 points

Hi Justin

Your tip helped a lot, but i still have a question regarding the code.

The Led doesn't flash anymore, is that because my code (that contains a few printf ) slows it down?

Regards,

Max

0 Justin Curewitz over 5 years ago in reply to max mannesse

TI__Mastermind 28055 points

Hi Max,

The LED will only blink when the tracker is detecting at least one person. So if there is no one in front of the device, this is fine.

Regards,

Justin

0 max mannesse over 5 years ago in reply to Justin Curewitz

Intellectual 340 points

Hi Justin,

I moved my code to around line 1720 in the mss_main.c file from the "People Counting" demo.

I put it after the tracker ran and "updated the current frame transit time" at line 1716.

Regards,

Max

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IWR6843ISK-ODS: Calculating Values from DataFormat