MMWCAS-DSP-EVM: Same Range / Doppler Issue with New DSP Board

Hi Mark,

I am not completely in loop about the previous discussion about the error regarding the DSP EVM. However, can you also confirm the following?

• Perform raw 2D FFT directly on the ADC of each of the device in MATLAB and see if you are able to observe the ripples across the devices.
• Have a corner reflector in your setup.
• Have no moving objects in your scene.
• Do the ripples also come with a different sampling rate/chirp interval? If so, are these at the same bins or something else?
• Can you try the same profile with a single chirp and perform 1D FFT on it and try to see if the behavior is the same?

I will get some additional info regarding the discussion the previous thread in the meanwhile.

Regards,

Kaushik

Can you walk me through how to do single chip measurements with the cascade device? I tried to several months ago on the original device but couldn't succeed, which I ended up blaming on the hardware after being told the hardware was faulty. I have tried again by setting the device map and mode list as follows:

>>dev_list = {1, 2, 4, 8} -- Device map
>>RadarDevice = {1, 0, 0, 0} -- {dev1, dev2, dev3, dev4}, 1: Enable, 0: Disable

>>cascade_mode_list = {0, 0, 0, 0} -- 0: Single chip, 1: Master, 2: Slave

but when I attempt to process the data in Matlab I receive the following error:

>>paramFile= C:\ti\mmwave_studio_02_01_01_00\mmWaveStudio\PostProc\Cascade_Capture_one_chip\Cascade_Capture_one_chip.mmwave.json
>>Unable to perform assignment because the left and right sides have a different number of elements.

>>Error in parameter_file_gen_json (line 100)
>>TxChannelEnabled(iconfig) = channelID;

>>Error in cascade_MIMO_signalProcessing (line 81)
>>parameter_file_gen_json(dataFolder_test, dataFolder_calib, module_param_file, pathGenParaFile, dataPlatform);

For your other questions:

- The ripples appear for all sample rate, chip rates, slopes, durations, etc.

- The following is an example of the radar return with a corner reflector at 2 meters. As you can see the stock signal processing calculates the distance to be ~8 meters and the ripple is clearly visible in range and azimuth.

Hi Mark,

Please find my inputs as follows:

• Thank you for your info regarding questions 2&3. It looks like this could be a hardware issue by looking at your observations and the previous thread.  The team member who helped you previously is out of office until next week. Will get back to you with more once I am able to communicate with them so, please expect a delay in response. Meanwhile, we can perform some additional debug to get more info.
• Have there been any other changes you have made in the lua script that came with studio?
• Regarding the error in the post processing, can you please find out the mismatch in assignment from the params taken in from the json file? Also make sure the json file describing your data capture has the right parameters.
• Alternatively, to the post processing script, you can read the data of a single device in Matlab and perform a 2D FFT as I had asked. This should correlate with the outputs from the studio's post processing. If there is different behavior here, there could be an issue with something else.

Regards,

Kaushik

Kaushik,

I dug into the assignment mismatch today. I'll try to tackle the 2d FFT of a single device tomorrow.

When post-processing my attempt at a single chip collection Matlab hits an error in line 100 of 'parameter_file_gen_json.m'. 

TxChannelEnabled(iconfig) = channelID; >>TxChannelEnabled is a 1 x 12 array of zeroes, iconfig equals 1, channelID is a 1 x 2 array [1 12]

Looking at the same line using all four chips TxChannelEnabled is a 12x12 array with ones along the diagonal, channelID is a double equal to the position of the one for the row given by iconfig (ie. when iconfig is 3 the one in row 3 of TxChannelEnabled is in position 10, so channelID = 10).

params_chirp.NumDevices = 4 in the single chip processing. I'm that comes from the number of "mmwaveDeviceId" instances in the *_mmwave.json file. Is the json file generated from the configuration sent to the cascade radar? If so, why are there four mmwaveDeviceId instances in the json file when the lua only only has the first device being enabled (RadarDevice = {1, 0, 0, 0} -- {dev1, dev2, dev3, dev4}, 1: Enable, 0: Disable) and all devices set to single chip (cascade_mode_list = {0, 0, 0, 0} -- 0: Single chip, 1: Master, 2: Slave)?

The lua code is fairly heavily paired down. I only have three tx chirps enabled and commented out all slave device related code. I am pasting the entire modified file below. 

***************************************************************************************************************************************************************************
--[[
Sequence being followed

A. CONFIGURATION
1. Connecting to TDA
1. Configuring Master from SOP till Channel Config
2. Configuring Slave (i) sequentially from SOP till SPI Connect. i = 1, 2, 3
3. Configuring Slaves together from F/W download till Channel Config
4. Configuring all devices together from LDO Bypass till Frame Config

NOTE:
Update the following in the script accordingly before running
1. metaImage F/W path on line 33
2. TDA Host Board IP Address on line 38
--]]

----------------------------------------User Constants----------------------------------------------------

dev_list = {1, 2, 4, 8} -- Device map
RadarDevice = {1, 0, 0, 0} -- {dev1, dev2, dev3, dev4}, 1: Enable, 0: Disable

cascade_mode_list = {0, 0, 0, 0} -- 0: Single chip, 1: Master, 2: Slave

-- F/W Download Path

-- Uncomment the next line if you wish to pop-up a dialog box to select the firmware image file
-- Otherwise, hardcode the path to the firmware metaimage below
-- By default, the firmware filename is: xwr12xx_metaImage.bin
--
-- metaImagePath = RSTD.BrowseForFile(RSTD.GetSettingsPath(), "bin", "Browse to .bin file")

metaImagePath = "C:\\ti\\mmwave_dfp_01_02_06_03\\firmware\\xwr12xx_metaImage.bin"

-- IP Address for the TDA2 Host Board
-- Change this accordingly for your setup

TDA_IPAddress = "192.168.33.180"

-- Device map of all the devices to be enabled by TDA
-- 1 - master ; 2- slave1 ; 4 - slave2 ; 8 - slave3

deviceMapOverall = RadarDevice[1] + (RadarDevice[2]*2) + (RadarDevice[3]*4) + (RadarDevice[4]*8)
deviceMapSlaves = (RadarDevice[2]*2) + (RadarDevice[3]*4) + (RadarDevice[4]*8)

-- Enable/Disable Test Source
-- This is useful during bringup

test_source_enable = 0 -- 0: Disable, 1: Enable

------------------------------------------- Sensor Configuration ------------------------------------------------

-- The sensor configuration consists of 3 sections:
-- 1) Profile Configuration (common to all 4 AWR devices)
-- 2) Chirp Configuration (unique for each AWR device - mainly because TXs to use are different for each chirp)
-- 3) Frame Configuration (common to all 4 AWR devices, except for the trigger mode for the master)
-- Change the values below as needed.

-- Profile configuration
local profile_indx = 0
local start_freq = 77 -- GHz
local slope = 79 -- MHz/us
local idle_time = 5 -- us
local adc_start_time = 6 -- us
local adc_samples = 256 -- Number of samples per chirp
local sample_freq = 8000 -- ksps
local ramp_end_time = 40 -- us
local rx_gain = 48 -- dB
local tx0OutPowerBackoffCode = 0
local tx1OutPowerBackoffCode = 0
local tx2OutPowerBackoffCode = 0
local tx0PhaseShifter = 0
local tx1PhaseShifter = 0
local tx2PhaseShifter = 0
local txStartTimeUSec = 0
local hpfCornerFreq1 = 0 -- 0: 175KHz, 1: 235KHz, 2: 350KHz, 3: 700KHz
local hpfCornerFreq2 = 0 -- 0: 350KHz, 1: 700KHz, 2: 1.4MHz, 3: 2.8MHz

-- Frame configuration
local start_chirp_tx = 0
local end_chirp_tx = 2
local nchirp_loops = 5 -- Number of chirps per frame
local nframes_master = 15 -- Number of Frames for Master
local nframes_slave = 15 -- Number of Frames for Slaves
local Inter_Frame_Interval = 100 -- ms
local trigger_delay = 0 -- us
local nDummy_chirp = 0
local trig_list = {1,2,2,2} -- 1: Software trigger, 2: Hardware trigger

-- Function to configure the chirps specific to a device
-- 12 chirps are configured below, individually for each AWR device
--
-- |-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|
-- | | Dev 1 | Dev 1 | Dev 1 | Dev 2 | Dev 2 | Dev 2 | Dev 3 | Dev 3 | Dev 3 | Dev 4 | Dev 4 | Dev 4 |
-- | Chirp | TX0 | TX1 | TX2 | TX 0 | TX1 | TX2 | TX0 | TX1 | TX2 | TX0 | TX1 | TX2 |
-- |-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|
-- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
-- | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
-- | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
-- | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
-- | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
-- | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
-- | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
-- | 7 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
-- | 8 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
-- | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
-- | 10 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
-- | 11 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
-- |-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|
--
--
-- Note: The syntax for this API is:
-- ar1.ChirpConfig_mult(RadarDeviceId, chirpStartIdx, chirpEndIdx, profileId, startFreqVar, freqSlopeVar, idleTimeVar, adcStartTimeVar, tx0Enable, tx1Enable, tx2Enable)

function Configure_Chirps(i)

if (i == 1) then

-- Chirp 0
if (0 == ar1.ChirpConfig_mult(dev_list[i], 0, 0, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 0 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 0 Configuration failed\n", "red")
return -4
end

-- Chirp 1
if (0 == ar1.ChirpConfig_mult(dev_list[i], 1, 1, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 1 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 1 Configuration failed\n", "red")
return -4
end

-- Chirp 2
if (0 == ar1.ChirpConfig_mult(dev_list[i], 2, 2, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 2 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 2 Configuration failed\n", "red")
return -4
end

--[[ -- Chirp 3
if (0 == ar1.ChirpConfig_mult(dev_list[i], 3, 3, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 3 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 3 Configuration failed\n", "red")
return -4
end

-- Chirp 4
if (0 == ar1.ChirpConfig_mult(dev_list[i], 4, 4, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 4 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 4 Configuration failed\n", "red")
return -4
end

-- Chirp 5
if (0 == ar1.ChirpConfig_mult(dev_list[i], 5, 5, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 5 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 5 Configuration failed\n", "red")
return -4
end

-- Chirp 6
if (0 == ar1.ChirpConfig_mult(dev_list[i], 6, 6, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 6 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 6 Configuration failed\n", "red")
return -4
end

-- Chirp 7
if (0 == ar1.ChirpConfig_mult(dev_list[i], 7, 7, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 7 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 7 Configuration failed\n", "red")
return -4
end

-- Chirp 8
if (0 == ar1.ChirpConfig_mult(dev_list[i], 8, 8, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 8 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 8 Configuration failed\n", "red")
return -4
end

-- Chirp 9
if (0 == ar1.ChirpConfig_mult(dev_list[i], 9, 9, 0, 0, 0, 0, 0, 0, 0, 1)) then
WriteToLog("Device "..i.." : Chirp 9 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 9 Configuration failed\n", "red")
return -4
end

-- Chirp 10
if (0 == ar1.ChirpConfig_mult(dev_list[i], 10, 10, 0, 0, 0, 0, 0, 0, 1, 0)) then
WriteToLog("Device "..i.." : Chirp 10 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 10 Configuration failed\n", "red")
return -4
end

-- Chirp 11
if (0 == ar1.ChirpConfig_mult(dev_list[i], 11, 11, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 11 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 11 Configuration failed\n", "red")
return -4
end

elseif (i == 2) then

-- Chirp 0
if (0 == ar1.ChirpConfig_mult(dev_list[i], 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 0 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 0 Configuration failed\n", "red")
return -4
end

-- Chirp 1
if (0 == ar1.ChirpConfig_mult(dev_list[i], 1, 1, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 1 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 1 Configuration failed\n", "red")
return -4
end

-- Chirp 2
if (0 == ar1.ChirpConfig_mult(dev_list[i], 2, 2, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 2 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 2 Configuration failed\n", "red")
return -4
end

-- Chirp 3
if (0 == ar1.ChirpConfig_mult(dev_list[i], 3, 3, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 3 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 3 Configuration failed\n", "red")
return -4
end

-- Chirp 4
if (0 == ar1.ChirpConfig_mult(dev_list[i], 4, 4, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 4 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 4 Configuration failed\n", "red")
return -4
end

-- Chirp 5
if (0 == ar1.ChirpConfig_mult(dev_list[i], 5, 5, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 5 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 5 Configuration failed\n", "red")
return -4
end

-- Chirp 6
if (0 == ar1.ChirpConfig_mult(dev_list[i], 6, 6, 0, 0, 0, 0, 0, 0, 0, 1)) then
WriteToLog("Device "..i.." : Chirp 6 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 6 Configuration failed\n", "red")
return -4
end

-- Chirp 7
if (0 == ar1.ChirpConfig_mult(dev_list[i], 7, 7, 0, 0, 0, 0, 0, 0, 1, 0)) then
WriteToLog("Device "..i.." : Chirp 7 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 7 Configuration failed\n", "red")
return -4
end

-- Chirp 8
if (0 == ar1.ChirpConfig_mult(dev_list[i], 8, 8, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 8 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 8 Configuration failed\n", "red")
return -4
end

-- Chirp 9
if (0 == ar1.ChirpConfig_mult(dev_list[i], 9, 9, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 9 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 9 Configuration failed\n", "red")
return -4
end

-- Chirp 10
if (0 == ar1.ChirpConfig_mult(dev_list[i], 10, 10, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 10 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 10 Configuration failed\n", "red")
return -4
end

-- Chirp 11
if (0 == ar1.ChirpConfig_mult(dev_list[i], 11, 11, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 11 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 11 Configuration failed\n", "red")
return -4
end

elseif (i == 3) then

-- Chirp 0
if (0 == ar1.ChirpConfig_mult(dev_list[i], 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 0 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 0 Configuration failed\n", "red")
return -4
end

-- Chirp 1
if (0 == ar1.ChirpConfig_mult(dev_list[i], 1, 1, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 1 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 1 Configuration failed\n", "red")
return -4
end

-- Chirp 2
if (0 == ar1.ChirpConfig_mult(dev_list[i], 2, 2, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 2 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 2 Configuration failed\n", "red")
return -4
end

-- Chirp 3
if (0 == ar1.ChirpConfig_mult(dev_list[i], 3, 3, 0, 0, 0, 0, 0, 0, 0, 1)) then
WriteToLog("Device "..i.." : Chirp 3 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 3 Configuration failed\n", "red")
return -4
end

-- Chirp 4
if (0 == ar1.ChirpConfig_mult(dev_list[i], 4, 4, 0, 0, 0, 0, 0, 0, 1, 0)) then
WriteToLog("Device "..i.." : Chirp 4 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 4 Configuration failed\n", "red")
return -4
end

-- Chirp 5
if (0 == ar1.ChirpConfig_mult(dev_list[i], 5, 5, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 5 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 5 Configuration failed\n", "red")
return -4
end

-- Chirp 6
if (0 == ar1.ChirpConfig_mult(dev_list[i], 6, 6, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 6 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 6 Configuration failed\n", "red")
return -4
end

-- Chirp 7
if (0 == ar1.ChirpConfig_mult(dev_list[i], 7, 7, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 7 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 7 Configuration failed\n", "red")
return -4
end

-- Chirp 8
if (0 == ar1.ChirpConfig_mult(dev_list[i], 8, 8, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 8 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 8 Configuration failed\n", "red")
return -4
end

-- Chirp 9
if (0 == ar1.ChirpConfig_mult(dev_list[i], 9, 9, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 9 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 9 Configuration failed\n", "red")
return -4
end

-- Chirp 10
if (0 == ar1.ChirpConfig_mult(dev_list[i], 10, 10, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 10 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 10 Configuration failed\n", "red")
return -4
end

-- Chirp 11
if (0 == ar1.ChirpConfig_mult(dev_list[i], 11, 11, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 11 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 11 Configuration failed\n", "red")
return -4
end

elseif (i == 4) then

-- Chirp 0
if (0 == ar1.ChirpConfig_mult(dev_list[i], 0, 0, 0, 0, 0, 0, 0, 0, 0, 1)) then
WriteToLog("Device "..i.." : Chirp 0 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 0 Configuration failed\n", "red")
return -4
end

-- Chirp 1
if (0 == ar1.ChirpConfig_mult(dev_list[i], 1, 1, 0, 0, 0, 0, 0, 0, 1, 0)) then
WriteToLog("Device "..i.." : Chirp 1 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 1 Configuration failed\n", "red")
return -4
end

-- Chirp 2
if (0 == ar1.ChirpConfig_mult(dev_list[i], 2, 2, 0, 0, 0, 0, 0, 1, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 2 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 2 Configuration failed\n", "red")
return -4
end

-- Chirp 3
if (0 == ar1.ChirpConfig_mult(dev_list[i], 3, 3, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 3 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 3 Configuration failed\n", "red")
return -4
end

-- Chirp 4
if (0 == ar1.ChirpConfig_mult(dev_list[i], 4, 4, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 4 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 4 Configuration failed\n", "red")
return -4
end

-- Chirp 5
if (0 == ar1.ChirpConfig_mult(dev_list[i], 5, 5, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 5 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 5 Configuration failed\n", "red")
return -4
end

-- Chirp 6
if (0 == ar1.ChirpConfig_mult(dev_list[i], 6, 6, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 6 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 6 Configuration failed\n", "red")
return -4
end

-- Chirp 7
if (0 == ar1.ChirpConfig_mult(dev_list[i], 7, 7, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 7 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 7 Configuration failed\n", "red")
return -4
end

-- Chirp 8
if (0 == ar1.ChirpConfig_mult(dev_list[i], 8, 8, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 8 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 8 Configuration failed\n", "red")
return -4
end

-- Chirp 9
if (0 == ar1.ChirpConfig_mult(dev_list[i], 9, 9, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 9 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 9 Configuration failed\n", "red")
return -4
end

-- Chirp 10
if (0 == ar1.ChirpConfig_mult(dev_list[i], 10, 10, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 10 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 10 Configuration failed\n", "red")
return -4
end

-- Chirp 11
if (0 == ar1.ChirpConfig_mult(dev_list[i], 11, 11, 0, 0, 0, 0, 0, 0, 0, 0)) then
WriteToLog("Device "..i.." : Chirp 11 Configuration successful\n", "green")
else
WriteToLog("Device "..i.." : Chirp 11 Configuration failed\n", "red")
return -4
end]]--

end

end

------------------------------------------- API Configuration ------------------------------------------------

-- 1. Connection to TDA. 2. Selecting Cascade/Single Chip. 3. Selecting 2-chip/4-chip

WriteToLog("Setting up Studio for Cascade started..\n", "blue")

if(0 == ar1.ConnectTDA(TDA_IPAddress, 5001, deviceMapOverall)) then
WriteToLog("ConnectTDA Successful\n", "green")
else
WriteToLog("ConnectTDA Failed\n", "red")
return -1
end

if(0 == ar1.selectCascadeMode(1)) then
WriteToLog("selectCascadeMode Successful\n", "green")
else
WriteToLog("selectCascadeMode Failed\n", "red")
return -1
end

WriteToLog("Setting up Studio for Cascade ended..\n", "blue")

--Master Initialization

-- SOP Mode Configuration
if (0 == ar1.SOPControl_mult(1, 4)) then
WriteToLog("Master : SOP Reset Successful\n", "green")
else
WriteToLog("Master : SOP Reset Failed\n", "red")
return -1
end

-- SPI Connect
if (0 == ar1.PowerOn_mult(1, 0, 1000, 0, 0)) then
WriteToLog("Master : SPI Connection Successful\n", "green")
else
WriteToLog("Master : SPI Connection Failed\n", "red")
return -1
end

-- Firmware Download. (SOP 4 - MetaImage)
if (0 == ar1.DownloadBssFwOvSPI_mult(1, metaImagePath)) then
WriteToLog("Master : FW Download Successful\n", "green")
else
WriteToLog("Master : FW Download Failed\n", "red")
return -1
end

-- RF Power Up
if (0 == ar1.RfEnable_mult(1)) then
WriteToLog("Master : RF Power Up Successful\n", "green")
else
WriteToLog("Master : RF Power Up Failed\n", "red")
return -1
end

-- Channel & ADC Configuration
if (0 == ar1.ChanNAdcConfig_mult(1,1,1,1,1,1,1,1,2,1,0,1)) then
WriteToLog("Master : Channel & ADC Configuration Successful\n", "green")
else
WriteToLog("Master : Channel & ADC Configuration Failed\n", "red")
return -2
end

--[[
-- Slaves Initialization

for i=2,table.getn(RadarDevice) do
local status = 0
if ((RadarDevice[1]==1) and (RadarDevice[i]==1)) then

-- SOP Mode Configuration
if (0 == ar1.SOPControl_mult(dev_list[i], 4)) then
WriteToLog("Device "..i.." : SOP Reset Successful\n", "green")
else
WriteToLog("Device "..i.." : SOP Reset Failed\n", "red")
return -1
end

-- SPI Connect
if (0 == ar1.AddDevice(dev_list[i])) then
WriteToLog("Device "..i.." : SPI Connection Successful\n", "green")
else
WriteToLog("Device "..i.." : SPI Connection Failed\n", "red")
return -1
end

end
end

-- Firmware Download. (SOP 4 - MetaImage)
if (0 == ar1.DownloadBssFwOvSPI_mult(deviceMapSlaves, metaImagePath)) then
WriteToLog("Slaves : FW Download Successful\n", "green")
else
WriteToLog("Slaves : FW Download Failed\n", "red")
return -1
end

-- RF Power Up
if (0 == ar1.RfEnable_mult(deviceMapSlaves)) then
WriteToLog("Slaves : RF Power Up Successful\n", "green")
else
WriteToLog("Slaves : RF Power Up Failed\n", "red")
return -1
end

-- Channel & ADC Configuration
if (0 == ar1.ChanNAdcConfig_mult(deviceMapSlaves,1,1,1,1,1,1,1,2,1,0,2)) then
WriteToLog("Slaves : Channel & ADC Configuration Successful\n", "green")
else
WriteToLog("Slaves : Channel & ADC Configuration Failed\n", "red")
return -2
end
]]--

-- All devices together

-- Including this depends on the type of board being used.
-- LDO configuration
if (0 == ar1.RfLdoBypassConfig_mult(deviceMapOverall, 3)) then
WriteToLog("LDO Bypass Successful\n", "green")
else
WriteToLog("LDO Bypass failed\n", "red")
return -2
end

-- Low Power Mode Configuration
if (0 == ar1.LPModConfig_mult(deviceMapOverall,0, 0)) then
WriteToLog("Low Power Mode Configuration Successful\n", "green")
else
WriteToLog("Low Power Mode Configuration failed\n", "red")
return -2
end

-- Miscellaneous Control Configuration
if (0 == ar1.SetMiscConfig_mult(deviceMapOverall, 1)) then
WriteToLog("Misc Control Configuration Successful\n", "green")
else
WriteToLog("Misc Control Configuration failed\n", "red")
return -2
end

-- Edit this API to enable/disable the boot time calibration. Enabled by default.
-- RF Init Calibration Configuration
if (0 == ar1.RfInitCalibConfig_mult(deviceMapOverall, 1, 1, 1, 1, 1, 1, 1, 65537)) then
WriteToLog("RF Init Calibration Successful\n", "green")
else
WriteToLog("RF Init Calibration failed\n", "red")
return -2
end

-- RF Init
if (0 == ar1.RfInit_mult(deviceMapOverall)) then
WriteToLog("RF Init Successful\n", "green")
else
WriteToLog("RF Init failed\n", "red")
return -2
end

---------------------------Data Configuration----------------------------------

-- Data path Configuration
if (0 == ar1.DataPathConfig_mult(deviceMapOverall, 0, 1, 0)) then
WriteToLog("Data Path Configuration Successful\n", "green")
else
WriteToLog("Data Path Configuration failed\n", "red")
return -3
end

-- Clock Configuration
if (0 == ar1.LvdsClkConfig_mult(deviceMapOverall, 1, 1)) then
WriteToLog("Clock Configuration Successful\n", "green")
else
WriteToLog("Clock Configuration failed\n", "red")
return -3
end

-- CSI2 Configuration
if (0 == ar1.CSI2LaneConfig_mult(deviceMapOverall, 1, 0, 2, 0, 4, 0, 5, 0, 3, 0)) then
WriteToLog("CSI2 Configuration Successful\n", "green")
else
WriteToLog("CSI2 Configuration failed\n", "red")
return -3
end

----------------------------Test Source Configuration------------------------------
-- This is useful for initial bringup.
-- Each device is configured with a test object at a different location.

if(test_source_enable == 1) then --if(test_source_enable == 1)

if(RadarDevice[1] == 1) then
-- Object at 5 m with x = 4m and y = 3m
if (0 == ar1.SetTestSource_mult(1, 0, 8, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then
WriteToLog("Device 1 : Test Source Configuration Successful\n", "green")
else
WriteToLog("Device 1 : Test Source Configuration failed\n", "red")
return -3
end
end

if(RadarDevice[2] == 1) then
-- Object at 5 m with x = 3m and y = 4m
if (0 == ar1.SetTestSource_mult(2, 0, 8, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then
WriteToLog("Device 2 : Test Source Configuration Successful\n", "green")
else
WriteToLog("Device 2 : Test Source Configuration failed\n", "red")
return -3
end
end

if(RadarDevice[3] == 1) then
-- Object at 13 m with x = 12m and y = 5m
if (0 == ar1.SetTestSource_mult(4, 0, 8, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then
WriteToLog("Device 3 : Test Source Configuration Successful\n", "green")
else
WriteToLog("Device 3 : Test Source Configuration failed\n", "red")
return -3
end
end

if(RadarDevice[4] == 1) then
-- Object at 13 m with x = 5m and y = 12m
if (0 == ar1.SetTestSource_mult(8, 0, 8, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -2.5, 327, 327, 0, 0, 0, 0, -327, 0, -327, 327, 327, 327, -95, 0, 0, 0.5, 0, 1, 0, 1.5, 0, 0, 0, 0, 0, 0,0)) then
WriteToLog("Device 4 : Test Source Configuration Successful\n", "green")
else
WriteToLog("Device 4 : Test Source Configuration failed\n", "red")
return -3
end
end

end

---------------------------Sensor Configuration-------------------------

-- Profile Configuration
if (0 == ar1.ProfileConfig_mult(deviceMapOverall, 0, start_freq, idle_time, adc_start_time, ramp_end_time, 0, 0, 0, 0, 0, 0, slope, 0, adc_samples, sample_freq, 0, 0, rx_gain)) then
WriteToLog("Profile Configuration successful\n", "green")
else
WriteToLog("Profile Configuration failed\n", "red")
return -4
end

-- Chirp Configuration
for i=1,table.getn(RadarDevice) do
if ((RadarDevice[1]==1) and (RadarDevice[i]==1)) then
Configure_Chirps(i)
end
end

-- Enabling/ Disabling Test Source
if(test_source_enable == 1) then
ar1.EnableTestSource_mult(deviceMapOverall, 1)
WriteToLog("Enabling Test Source Configuration successful\n", "green")
end

-- Frame Configuration
-- Master
if (0 == ar1.FrameConfig_mult(1,start_chirp_tx,end_chirp_tx,nframes_master, nchirp_loops, Inter_Frame_Interval, 0, 0, 1)) then
WriteToLog("Master : Frame Configuration successful\n", "green")
else
WriteToLog("Master : Frame Configuration failed\n", "red")
end
--[[-- Slaves
if (0 == ar1.FrameConfig_mult(deviceMapSlaves,start_chirp_tx,end_chirp_tx,nframes_slave, nchirp_loops, Inter_Frame_Interval, 0, 0, 2)) then
WriteToLog("Slaves : Frame Configuration successful\n", "green")
else
WriteToLog("Slaves : Frame Configuration failed\n", "red")
end]]--

Hi Mark,

Please let me know your findings based on how your experiments go. In the meanwhile, I will try to get a debug setup on my end.

Regards,

Kaushik

I grabbed the raw data, radar_data_RXchain, from line 87 in <installation_path>\4chip_cascade_MIMO_example\modules\calibration\@calibrationCascade\datapath.m and ran it through a  2d range/angle function only using radar_data_RXchain(:,:,1:4,1) which should be Tx antenna 12 and Rx antennas 13 through 16 all from chip 4. Results are below.

 

Has anyone had a chance to look into this?

Hi Mark,

I am still in the process of getting a debug setup on my end and a small delay can be expected. I have also reached out to the team in the previous issue to get more details on the issue and am awaiting their response.

• From the range-angle plot you have shared, it looks like the ADC data itself is spurious and the post processing did not cause anything here.
• It will also help if you can mention the FW version that you are using and what your scene looked like? Was it the same corner reflector at 2m?
• Are you also sure that there are no other metallic objects or such in the scene which could cause cross path or multipath reflections?
• Can you re-run the same script with the same data but considering only 1 chip at a time. This can tell us if any particular device is corrupted or what else to look for.
• You can also ignore the provided scripts and perform a vanilla FFT across the samples on MATLAB just as an additional confirmation.

Regards,

Kaushik