Texas Instruments Vision SDK Linux Bedienungsanleitung

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Vision SDK Linux

Cascade Radar Data Acquisition

Tool

User Guide

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IMPORTANT NOTICE

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TABLE OF CONTENTS

1Introduction ................................................................................................. 4

1.1 Block Diagram .................................................................................................4

1.2 Program Flow ..................................................................................................5

1.3 Data Output Format .........................................................................................6

2Requirements for Running Data Acquisition Tool ......................................... 7

3Build Linux Vision SDK for Cascade Radar EVM ............................................ 7

4Build Linux Vision SDK for Cascade Radar EVM with Radar Studio ............... 7

5Data Acquisition Tool ................................................................................... 8

5.1 Run Data Acquisition using Radar Studio .............................................................8

5.2 Run Data Acquisition Tool..................................................................................8

5.3 Retrieve Data ................................................................................................ 10

6Revision History ......................................................................................... 11

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1Introduction

This user guide provides details on how to build and utilize the data acquisition tool

to capture raw data (ADC samples) from 4x AWR1243 Cascade Radar RF board with

TDA2x Digital board.

For 4x AWR1243 Cascade Radar, depending on the Radar configuration, the raw data

throughput could be up to ~6 Gbps. To save the raw data in real-time to a storage

device, it requires an interface with very high BW capability. On TDA2x, PCIe

interface can provide maximum 5Gbps BW per lane with total of 2 lanes. Using 2-

lane PCIe interface on TDA2x to connect to a SSD storage device, it is sufficient to

achieve real-time data acquisition for 4-chip cascade radar use case.

1.1 Block Diagram

The data acquisition tool implements the data scheme as shown in the following

block diagram.

AWR1243

Cascade RF

Board

Eth

TDA2x

SPI

GPIO

PCIe

CSI-2

SSD Hard Drive

Use SCP (Secure

Copy) to transfer

files from EVM to PC

over Ethernet

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1.2 Program Flow

The main component of Data acquisition Tool is DataCollect Link running on A15 in

TDA2x. DataCollect Link implemented the program flow as shown in the following

figure.

DataCollect Link

TaskMain

DataCollect Link

Create

CREATE

DiskBucket

Object

Create

DataCollect Link

Run

Run-time

Command

Received?

DataCollect Link

ProcessFrame

NEW DATA

DiskBucket

WriteData

Write Complete

Search for existing data

files under “/mnt/ssd”

folder

Set File name index AND

Copy Configuration Files

to “/mnt/ssd/” folder

Open New Data File with

the next Filename Index

Data File is

opened and not

full?

Copy Data to file until the

file size reaches 2GB

Yes

Update Index File

containing frame size and

number of frames in the

file

DataCollect Link

Delete

STOP

DiskBucket

Object

Delete

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1.3 Data Output Format

Data Acquisition Tool will save 3 types of files to the SSD card.

Radar Configuration Files

Radar Configuration files used for the acquiring data set will be copied to SSD

as “bxxxx_cfg_00.txt” ~ “bxxx_cfg_03.txt”.

Data Files

Data will be saved to a new file every 2GB as “bxxxx_data.bin”.

Index Files

Each data file has an index file, “bxxxx_idx.bin” to provide the frame size and

numbers of total frames stored in the file.

The following screenshot shows an example of the files saved to SSD by Data

Acquisition Tool.

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2Requirements for Running Data Acquisition Tool

It is important to make sure the required components are available before trying to

use the data acquisition tool.

Hardware Requirements:

o4-Chips AWR1243 Cascade Radar Board and TDA2xx Processing board

oNvme M.2 PCIe SSD card (ex. Link)

oWindows or Ubuntu PC

Processor SDK Vision 3.6 release or later (Linux version)

Please Refer to VisionSDK_Linux_UserGuide.pdf for SDK requirements

3Build Linux Vision SDK for Cascade Radar EVM

1. Follow the instructions in the Chapter 2 of VisionSDK_Linux_UserGuide.pdf to

install Linux Vision SDK and set up the build environment.

2. Apply kernel patch. Patch can be found under the following location.

[SDK_INSTALL]/ti_components/os_tools/linux/kernel/linux-kernel-

addon/kernel-patches/

3. Apply u-boot patches. Patch can be found under the following location.

[SDK_INSTALL]/ti_components/os_tools/linux/kernel/linux-kernel-addon/u-

boot-patches/

4. Follow the build instructions in Chapter 3 of the SDK User Guide. Set

MAKECONFIG=tda2xx_cascade_linux_radar in Rules.make.

5. Follow the instructions in SDK User guide to prepare the SD card.

6. Place the radar configuration files under “/opt/vision” folder in file system on

SD card. The example configuration files can be found under

~\vision_sdk\apps\src\rtos\radar\src\usecases\cascade_radar_object_detect\

radar_test_vector. Please refer to ProcessorSDKRadar_UserGuide.pdf for the

details regarding the configuration files.

4Build Linux Vision SDK for Cascade Radar EVM with Radar Studio

1. Follow the instructions in the Chapter 2 of VisionSDK_Linux_UserGuide.pdf to

install Linux Vision SDK and set up the build environment.

2. Apply kernel patch. Patch can be found under the following location.

[SDK_INSTALL]/ti_components/os_tools/linux/kernel/linux-kernel-

addon/kernel-patches/

3. Apply u-boot patches. Patch can be found under the following location.

[SDK_INSTALL]/ti_components/os_tools/linux/kernel/linux-kernel-addon/u-

boot-patches/

4. Make RADAR_STUDIO=yes in

[SDK_INSTALL]/vision_sdk/apps/configs/tda2xx_cascade_linux_radar/cfg.mk

5. Follow the build instructions in Chapter 3 of the SDK User Guide. Set

MAKECONFIG=tda2xx_cascade_linux_radar in Rules.make.

6. Follow the instructions in SDK User guide to prepare the SD card.

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5Data Acquisition Tool

Before running data acquisition tool, the NVMe M.2 SSD card should be installed on

the EVM as shown in the following figure. Remove the Cascade RF board first to have

access to the SSD card slot on the TDA2x processing board. After installing SSD

card, secure the RF board back to the connectors on the TDA2x processing board.

Before powering up the board, make sure the S4 Dip Switch, as shown in the

following figure, is set to [1:6] = [111001] to boot from SD card.

After powering up the board and booting to Linux kernel prompt, please make sure the SSD card

is detected. If the SSD is detected correctly, the device will be “/dev/nvme0”.

5.1 Run Data Acquisition using Radar Studio

Follow the Radar studio 2.1.0 release userguide.

5.2 Run Data Acquisition Tool

1. Format the partition on SSD card as needed. Use “fdisk” and “mkfs” tools.

Please refer to the manual of “fdisk” and “mkfs” for details.

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2. Create “/mnt/ssd” folder and mount the partition on SSD for data storage to

this folder.

3. Start Vision SDK Demo Application.

$> cd /opt/vision_sdk

$> source ./vision_sdk_load.sh

$> ./apps.out

4. Select ‘6’ for Radar Usecases.

5. Select ‘2’ for Cascade Radar Capture + Data Acquisition.

6. Once the use case starts, the tool will search the existing files under /mnt/ssd

folder. If there are already data files from prior runs, it will create the new file

with incrementing index for file name.

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5.3 Retrieve Data

3 ways to retrieve the radar data collected in SSD card as the followings.

Use Linux PC (Ubuntu) –Preferred

From EVM prompt, run “ifconfig” to obtain EVM IP address. Use SCP to

transfer file to PC.

Use Windows PC

Download “WinSCP” for Windows and use it to transfer file from EVM to PC.

Remove SSD card from EVM

Use M.2 SSD-to-USB adapter/enclosure to read SSD card on PC.

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