IWR1642BOOST: False number of data samples from DCA1000EVM

Hello,

Recently, I tried to capture raw data from IWR1642BOOST+DCA1000EVM with mmwavelink_example (NOT mmWave Studio) provided in C:\ti\mmwave_dfp_01_02_05_01\ti\example\mmwavelink_example according to https://e2e.ti.com/support/sensors/f/1023/p/826017/3055751#3055751.

However, the captured number of samples are half to that of expected. Here are my configurations:

IWR1642 in SOP-2 mode;

1 Tx and 4 Rx enabled;

adcBits = 16 bits;

adcFormat = complex1x;

256 samples per chirp;

99 chirps per frame;

1 frame is sent;

advance frame disabled;

Then the expected number of samples is 1(Tx) * 4(Rx) * 2(I/Q channel) * 256(samples per chirp) * 99(chirps per frame), but I get half of the samples than expected.

I tried the above configurations with mmWave Studio under SOP-4 mode to capture raw data, and the output is correct.

Here are some of the possible explanations:

1. mmwavelink_example is not applicable on IWR1642 or need some modification;

2. configurations are diffferent between SOP-2 and SOP-4 mode;

3. miss some configurations;

I tried to tune the configuration file parameters but have stuck in here for days and I'm waitting for your expertise!

The below is the detailed configuration file I used.

#ti\control\mmwavelink\docs\doxygen\html\index.html

#############Basic Config###############################[FIRM]
cascade_enable=0;
# crcType 0:16Bit/1:32Bit/2:64Bit/3:disable
crcType=1;
ackTimeout=1000;

# binary format, e.g. 3=(11), 15=(1111)
channelTx=1;
channelRx=15;
cascading=0;

# =b2AdcBits: 0(12 Bits), 1(14 Bits), 2(16 Bits)
adcBits=2;
# =b2AdcOutFmt: 0(Real), 1(Complex), 2(Complex with Image band), 3(Pseudo Real)
adcFormat=1;

# rxChanEn: 15=(1111)
# adcFmt: 0(Real), 1(Complex), 2(Complex with Image band), 3(Pseudo Real)
# iqSwapSel: 0 I First, 1 Q First
# chInterleave: 0 Interleave, 1 Non-Interleave(Allowed for 1642)
rxChanEn=15;
# =adcBits: 0(12 Bits), 1(1=4 Bits), 2(16 Bits)
adcBitsD=2;
adcFmt=1;
iqSwapSel=0;
chInterleave=1;

#lpAdcMode - 0(Regular) 1(LowPower)
anaCfg=0;
lpAdcMode=1;

################Data Path config###########################[FIRM]
#intfSel: 0 CSI2, 1 LVDS, 2 SPI
#transferFmtPkt0: 1 ADC_DATA_ONLY, 6 CP_ADC_DATA, 9 ADC_CP_DATA, 54 CP_ADC_CQ_DATA
#transferFmtPkt1: 0: Suppress Packet 1, 14 CP_CQ_DATA, 11 CQ_CP_DATA
#cqConfig: 0 12bit, 1 14bit, 2 16bit
intfSel=1;
transferFmtPkt0=1;
transferFmtPkt1=0;

#LVDS clock config[FIRM]
#laneClk: 0 SDR Clock, 1 DDR Clock(Only Valid for CSI2)
#dataRate: 0 900,1 600,2 450,3 400,4 300,5 225,6 150
laneClk=1;
dataRate=1;

#HSI clock[FIRM]
#SDR: 0x5(900 mbps), 0xA(600 mbps), 0x6(450 mbps), 0x2(400 mbps), 0xB(300 mbps), 0x7(225 mbps)
#DDR: 0xD(900 mbps), 0x9(600 mbps), 0x5(450 mbps), 0x1(400 mbps), 0xA(300 mbps), 0x6(225 mbps ), 0xB(150 mbps)
hsiClk=9

#LANE config[FIRM]
#laneEn: 1111 All enable(0011 for 1642)
laneEn=3;

#LVDS Lane Config[FIRM]
#laneFmtMap: 0 Format0, 1 Format1
#laneParamCfg: complicated, refer to documentary
laneFmtMap=0;
laneParamCfg=1;

########################################################################
########################################################################
#Profile config
#digOutSampleRate: 	1LSB=1 ksps
#startFreqConst: 	1LSB=53.644 Hz (77GHz~1435388860)
#idleTimeConst: 	1LSB=10ns (10us~1000) Valid: 0 to 524287
#adcStartTimeConst: 1LSB=10ns (6us~600) Valid: 0 to 4095
#rampEndTime: 		1LSB=10ns(60us~6000)  Valid: 0 to 500000
#freqSlopeVar: 		1LSB=48.279KHz Valid: -2072~2072 (Max 100MHz/uS)
#txStartTime: 		1LSB=10ns, Valid: -4096 to 4095
#numAdcSamples: 	Must be times of 2
profileId=0;
startFreqConst=1435388860;
idleTimeConst=1000;
adcStartTimeConst=600;
rampEndTime=4700;
txOutPowerBackoffCode=0;
txPhaseShifter=0;
freqSlopeConst=1762;
txStartTime=0;
numAdcSamples=256;
digOutSampleRate=6250;
hpfCornerFreq1=0;
hpfCornerFreq2=0;
txCalibEnCfg=511;
rxGain=30;

#Chirp Configuration
#txEnable: 11=All enable
chirpStartIdx=0;
chirpEndIdx=0;
profileIdCPCFG=0;
startFreqVar=0;
freqSlopeVar=0;
idleTimeVar=0;
adcStartTimeVar=0;
txEnable=1;

#Frame configuration
#periodicity: 	1LSB=5ns(20000000~100ms)
chirpStartIdxFCF=0;
chirpEndIdxFCF=0;
frameCount=1;
loopCount=99;
periodicity=8000000;
triggerDelay=0;
triggerSelect=1;
########################################################################END

Thanks.

Eson