IWR6843: advanced frame configuration

Hello,

Why do you have have chirpCfg commands with 0 TX enabled?

chirpCfg 1 1 0 0 0 0 0 0

and 

chirpCfg 3 3 1 0 0 0 0 0

If I remove the 0TX chirps then the cfg is able to run. profile_ISK_e2e_adv_sf.cfg

Thanks for your answer.

1. Why do you have have chirpCfg commands with 0 TX enabled?

   -> I downloaded 1 TX CFG from TI VISUALIZER.

% ***************************************************************
% Created for SDK ver:03.02
% Created using Visualizer ver:3.2.1.0
% Frequency:60
% Platform:xWR68xx
% Scene Classifier:best_range_res
% Azimuth Resolution(deg):30
% Range Resolution(m):0.044
% Maximum unambiguous Range(m):9.02
% Maximum Radial Velocity(m/s):1
% Radial velocity resolution(m/s):0.13
% Frame Duration(msec):100
% Range Detection Threshold (dB):15
% Doppler Detection Threshold (dB):15
% Range Peak Grouping:enabled
% Doppler Peak Grouping:enabled
% Static clutter removal:disabled
% Angle of Arrival FoV: Full FoV
% Range FoV: Full FoV
% Doppler FoV: Full FoV
% ***************************************************************
sensorStop
flushCfg
dfeDataOutputMode 1
channelCfg 15 1 0
adcCfg 2 1
adcbufCfg -1 0 1 1 1
profileCfg 0 60 1192 7 57.14 0 0 70 1 256 5209 0 0 30
chirpCfg 0 0 0 0 0 0 0 1
chirpCfg 1 1 0 0 0 0 0 0
-------------------------------------------------------------------------------

So I also enabled 0TX.

2. 

My cfg file only applies profileConfig 1(60meters) to all tx.
The cfg file you sent applies only profileConfig 0(200meters) to all tx.
My intention is proFileCfg 0 for Tx3, and profileCfg1 for Tx1 and Tx2 sequentially; i.e.
At time 0, profileCfg 0 through Tx3, At time 1, profileCfg1 through Tx1, and at time 2, profileCfg1 through Tx2.
Please let me know an appropriate configuration to acheive the goal.

My intention is proFileCfg 0 for Tx3, and proFileCfg 1 for Tx1 and Tx2 sequentially.

Please let me know an appropriate configuration to acheive the goal

Hello.

I revised the cfg according to your advice, but not all points exceed 67 meters.
Profile 0 does not apply to subframe 0 and profile 1 appears to apply to all subframe.

In the video attached below, subframe 0 is blue points and subframe 1 is red points.

My intention is proFileCfg 0 for Tx3, and proFileCfg 1 for Tx1 and Tx2 sequentially.

Please let me know an appropriate configuration to acheive the goal.

sensorStop
flushCfg
dfeDataOutputMode 3
channelCfg 15 7 0
adcCfg 2 1
adcbufCfg -1 0 1 1 1
profileCfg 0 61 3 1 41 0 0 4 1 256 6500 0 0 48
profileCfg 1 61 3 1 100 0 0 6 1 256 2689 0 0 48
chirpCfg 0 0 0 0 0 0 0 4
chirpCfg 1 1 1 0 0 0 0 1
chirpCfg 2 2 1 0 0 0 0 2
advFrameCfg 2 0 0 1 0
subFrameCfg 0 0 0 2 64 100 0 1 1 100
subFrameCfg 1 0 2 1 64 100 0 1 1 100
lowPower 0 0
guiMonitor 0 1 1 0 0 0 1
guiMonitor 1 1 1 0 0 0 1
cfarCfg 0 0 2 8 4 3 0 10 0
cfarCfg 0 1 0 4 2 3 1 10 0
cfarCfg 1 0 2 8 4 3 0 10 0
cfarCfg 1 1 0 4 2 3 1 10 0
aoaFovCfg 0 -90 90 -90 90
aoaFovCfg 1 -90 90 -90 90
cfarFovCfg 0 0 0 250
cfarFovCfg 1 0 0 250
cfarFovCfg 0 1 -30 30
cfarFovCfg 1 1 -30 30
clutterRemoval -1 0
multiObjBeamForming 0 1 0.5
multiObjBeamForming 1 1 0.5
calibDcRangeSig 0 0 -5 8 256
calibDcRangeSig 1 0 -5 8 256
compRangeBiasAndRxChanPhase 0.0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
measureRangeBiasAndRxChanPhase 0 1.5 0.2
bpmCfg -1 0 0 1
extendedMaxVelocity -1 0
CQRxSatMonitor 0 3 4 67 0
CQSigImgMonitor 0 127 4
CQRxSatMonitor 1 3 4 67 0
CQSigImgMonitor 1 127 4
analogMonitor 0 0
lvdsStreamCfg -1 0 0 0
sensorStart

If the range of subframe 1 is changed by adjusting the frequency slope of profile 1, subframe 0 is also affected.

Hello,

• The subframecfg commands you have used are incorrect. Please check against the example file I provided. You have configured # of chirp cfgs to 2 when it should be 1 and vice versa.
• The main issue is I cannot debug your device firmware and visualizer.
  • Are you running your own custom demo code? And are you using your own EVM?
  •  You've configured subframe 0 to only be 1 transmitter (TX3) This means of course that you will only have range information and not angle. There cannot be a 2D scatter plot for SF0.
  • For a 2D point cloud if you are using the same antenna layout/config as the IWR6843ISK the azimuth TX's are TX1 and 3. I assume since you are wanting to get a 2D scatter from TX1 and TX2 you have your own antenna layout or you are running your own demo code with angle estimation modfied to support the TX1-TX2 config you are using.

I would recommend that you follow and use the chirp cfg example of advanced SF usage provided in the mmwave SDK. You can use the mmWave Demo Visualizer and see how different profiles are applied for the subframes.

Amanda

Hello,

This is the cfg you sent me.

profileCfg 0 61 3 1 41 0 0 4 1 256 6500 0 0 48
profileCfg 1 61 3 1 100 0 0 6 1 256 2689 0 0 48

% Chirps for SF0 w/ TX3 only and Profile 0
chirpCfg 0 0 0 0 0 0 0 4
%chirpCfg 1 1 0 0 0 0 0 4

% Chirps for SF1 w/ TX1 TX2 only and Profile1
chirpCfg 2 2 1 0 0 0 0 1
chirpCfg 3 3 1 0 0 0 0 2

advFrameCfg 2 0 0 1 0

% SF0
subFrameCfg 0 0 0 1 64 100 0 1 1 100
% SF1
subFrameCfg 1 0 2 2 64 100 0 1 1 100

Using TI EVM(IWR6843ISK) and SDK 3.2, to apply TX2 to SUB0 and TX1-TX3 to SUB1 do the following?

profileCfg 0 61 3 1 41 0 0 4 1 256 6500 0 0 48
profileCfg 1 61 3 1 100 0 0 6 1 256 2689 0 0 48
chirpCfg 0 0 0 0 0 0 0 2
chirpCfg 2 2 1 0 0 0 0 1
chirpCfg 3 3 1 0 0 0 0 4
advFrameCfg 2 0 0 1 0
subFrameCfg 0 0 0 1 64 100 0 1 1 100
subFrameCfg 1 0 2 2 64 100 0 1 1 100

SUB 0 TX3, SUB 1 TX1-TX2

SUB 0 TX2, SUB 1 TX1-TX3

SubFrame 1 (red point) is applied to profileConfig 1 and has to be 67m long but the red point is 240m long.
profileConfig0 appears to apply to all subframe.
How should we solve this?

Hello,

Can you please test your demo and visualizer with the example subframe cfg provided in the SDK?

This is to check whether the issue is with the particular cfg you are using or the visualization.

Amanda