IWR1843BOOST: Problem with beamsteering using lua script

Thanks a lot Pedrhom, I really appreciate the speedy response. If you don't mind me asking another question (Please bear with me as I am just an undergrad with not a lot of RF background)

So I understood how the Frame based beam-steering works ( All the chirps in a frame are configured to steer at the beam at the same angle). Now I was wondering if I wanted to have beams at different angles in the same frame so that each chirp in the frame has a differently shifted TX phases to project the beam at different angles like say by increments of 5 degrees. 

BSS_FW = "C:\\ti\\mmwave_studio_02_01_01_00\\rf_eval_firmware\\radarss\\xwr18xx_radarss.bin"
MSS_FW = "C:\\ti\\mmwave_studio_02_01_01_00\\rf_eval_firmware\\masterss\\xwr18xx_masterss.bin"


file_path = "C:\\ti\\data_capture"

adc_data_path1 = file_path.."\\AOP_adc_data_profile_bf.bin"
raw_data_path1 = file_path.."\\AOP_adc_data_profile_bf_Raw_0.bin"
pkt_log_path1  = file_path.."\\AOP_profile_bf_pktlogfile.txt"



--RX Gain Calculation
RF_GAIN_TARGET_30dB = 0
RF_GAIN_TARGET_34dB = 64
RF_GAIN_TARGET_26dB = 192
RX_GAIN_INPUT = 44


START_FREQ = 78
IDLE_TIME = 10
ADC_START_TIME = 8
RAMP_END_TIME = 49.2
TX_BACKOFF = 3
SLOPE_CONST = 60.833
TX_START_TIME = 0
NUM_ADC_SAMPLES = 512
SAMPLING_RATE = 12500
HPF1 = 3
HPF2 = 1
RX_GAIN = RF_GAIN_TARGET_30dB + RX_GAIN_INPUT

--COM_PORT = 3
COM_PORT = 3

--reset and connect
--ar1.FullReset()
--ar1.SOPControl(2)
ar1.Connect(COM_PORT,921600,1000)

--download BSS FW
if (ar1.DownloadBSSFw(BSS_FW) == 0) then
    WriteToLog("BSS FW Download Success\n", "green")
else
    WriteToLog("BSS FW Download failure\n", "red")
end
RSTD.Sleep(500)

-- Download MSS FW
if (ar1.DownloadMSSFw(MSS_FW) == 0) then
    WriteToLog("MSS FW Download Success\n", "green")
else
    WriteToLog("MSS FW Download failure\n", "red")
end
RSTD.Sleep(500)

-- SPI Connect
if (ar1.PowerOn(1, 1000, 0, 0) == 0) then
    WriteToLog("Power On Success\n", "green")
else
   WriteToLog("Power On failure\n", "red")
end
RSTD.Sleep(500)

-- RF Power UP
if (ar1.RfEnable() == 0) then
    WriteToLog("RF Enable Success\n", "green")
else
    WriteToLog("RF Enable failure\n", "red")
end
RSTD.Sleep(500)

-- Channel Config
if (ar1.ChanNAdcConfig(1, 1, 1, 1, 1, 1, 1, 2, 1, 0) == 0) then
    WriteToLog("ChanNAdcConfig Success\n", "green")
else
    WriteToLog("ChanNAdcConfig failure\n", "red")
end
RSTD.Sleep(500)

-- LDO Bypass Enable
ar1.RfLdoBypassConfig(0x3)

-- ADC Config
if (ar1.LPModConfig(0, 0) == 0) then
	WriteToLog("Regualar mode Cfg Success\n", "green")
else
	WriteToLog("Regualar mode Cfg failure\n", "red")
end
RSTD.Sleep(500)

-- Enable Per Chirp Phase Shifter
if (ar1.SetMiscConfig(1) == 0) then
	WriteToLog("Per Chirp Phase Shifter Enable Success\n", "green")
else
	WriteToLog("Per Chirp Phase Shifter Enable failure\n", "red")
end
RSTD.Sleep(500)

-- RF Init
if (ar1.RfInit() == 0) then
    WriteToLog("RfInit Success\n", "green")
else
    WriteToLog("RfInit failure\n", "red")
end
RSTD.Sleep(1000)

-- Data Path Config
if (ar1.DataPathConfig(513, 1216644097, 0) == 0) then
    WriteToLog("DataPathConfig Success\n", "green")
else
    WriteToLog("DataPathConfig failure\n", "red")
end
if (ar1.LvdsClkConfig(1, 1) == 0) then
    WriteToLog("LvdsClkConfig Success\n", "green")
else
    WriteToLog("LvdsClkConfig failure\n", "red")
end
if (ar1.LVDSLaneConfig(0, 1, 1, 0, 0, 1, 0, 0) == 0) then
    WriteToLog("LVDSLaneConfig Success\n", "green")
else
    WriteToLog("LVDSLaneConfig failure\n", "red")
end
RSTD.Sleep(500)

-- Profile Config
if (ar1.ProfileConfig(0, START_FREQ, IDLE_TIME, ADC_START_TIME, RAMP_END_TIME, TX_BACKOFF, TX_BACKOFF, TX_BACKOFF, 0, 0, 0, SLOPE_CONST, TX_START_TIME, NUM_ADC_SAMPLES, SAMPLING_RATE, HPF1, HPF2, RX_GAIN) == 0) then
    WriteToLog("ProfileConfig Success\n", "green")
else
    WriteToLog("ProfileConfig failure\n", "red")
end


for i =0,63 do
    if (ar1.ChirpConfig(i, i, 0, 0, 0, 0, 0, 1, 1, 1) == 0) then
        WriteToLog("ChirpConfig #%d Success\n", "green")
    else
        WriteToLog("ChirpConfig #%d failure\n", "red")
    end
end


if (ar1.FrameConfig(0, 63, 20, 4, 25, 0, 0, 1) == 0) then
    WriteToLog("FrameConfig Success\n", "green")
else
    WriteToLog("FrameConfig failure\n", "red")
end
RSTD.Sleep(500)

-- Configure Chirp Based Phase Shifter
for i =0,16 do
    if (ar1.SetPerChirpPhaseShifterConfig(i, i, 0, 0, i) == 0) then
        WriteToLog("Chirp Based Phase Shifter Configuration #%d Success\n", "green")
    else
        WriteToLog("Chirp Based Phase Shifter Configuration #%d failure\n", "red")
    end
end

for i =17,63 do
    if (ar1.SetPerChirpPhaseShifterConfig(i, i, 0, (i-16), i) == 0) then
        WriteToLog("Chirp Based Phase Shifter Configuration #%d Success\n", "green")
    else
        WriteToLog("Chirp Based Phase Shifter Configuration #%d failure\n", "red")
    end
end

RSTD.Sleep(500)

-- Connect DCA1000
if (ar1.SelectCaptureDevice("DCA1000") == 0) then
    WriteToLog("SelectCaptureDevice Success\n", "green")
else
    WriteToLog("SelectCaptureDevice failure\n", "red")
end
if (ar1.CaptureCardConfig_EthInit("192.168.33.30", "192.168.33.180", "12:34:56:78:90:12", 4096, 4098) == 0) then
    WriteToLog("CaptureCardConfig_EthInit Success\n", "green")
else
    WriteToLog("CaptureCardConfig_EthInit failure\n", "red")
end
if (ar1.CaptureCardConfig_Mode(1, 2, 1, 2, 3, 30) == 0) then
    WriteToLog("CaptureCardConfig_Mode Success\n", "green")
else
    WriteToLog("CaptureCardConfig_Mode failure\n", "red")
end
if (ar1.CaptureCardConfig_PacketDelay(100) == 0) then
    WriteToLog("CaptureCardConfig_PacketDelay Success\n", "green")
else
    WriteToLog("CaptureCardConfig_PacketDelay failure\n", "red")
end
RSTD.Sleep(1000)

----------------------------- Capture 1 -----------------------------
--Start Record ADC data
ar1.CaptureCardConfig_StartRecord(adc_data_path1, 1)
RSTD.Sleep(1000)

--Trigger frame
ar1.StartFrame()
RSTD.Sleep(15000)

For this use case, I found a script from TI which configures 64 chirps separately and then performs phase shifter by chirp and it seems to have this phase shifter pattern where for the chirps Chirp-0 to Chirp-16 : TX0: 0 TX1: 0 TX2: Increases from 0 to 90 in shifts of 5.625 while from Chirp-17 to Chirp-63  TX0: 0 TX1: Increases from 5.625 to (63-17)*5.625 TX2: increases from 17*5.625 to 63*5.625. 

I would like to know why this phase shifter pattern was picked and how is the beamforming effectively happening because of this. I would like to beam steer in increments of 5 degrees between -60 to 60 degrees from my use case. So I would be grateful if you could tell me the logic for  modifying the  script for the same.

Thanks. I am getting the IWR6843 board soon so I will try to modify the demo for my usecase. Although I have been experimenting and beamforming seems to be working fine but I have some doubts validating it. Have started a new thread for that.