The MMWCAS-RF-EVM and MMWCAS-DSP-EVM boards from Texas Instruments (TI) are supported
with the TI-provided software mmwave studio. As so, one needs a Windows OS and Matlab
runtime engine to try out the millimeter wave radars and their capabilities.
This tool is a Linux driver for the RF and DSP boards, to enable the recording of data from a Linux OS. As so, it can be built to run on embedded Linux devices such as Raspberry Pi or so.
mmwave is based on the mmwavelink library and build out of the example source
codes provided by TI.
NOTE:
- Only MIMO Configuration with all the 04 radar chips is currently supported with this driver.
- Only Ethernet connection to the board is currently supported.
All the third-party libraries needed are already present in the repository.
mmwave can then be installed as follows:
git clone <mmwave-repository-git-url>
cd mmwave
sudo make install # Build and install mmwave on the machineYou can first check if mmwave is properly installed by typing the help command.
mmwave -hYou shall the see a help menu similar to the one below.
usage: mmwave [-d] [-p] [-i] [-c] [-r] [-t] [-f] [-h] [-v]
Configuration and control tool for TI MMWave cascade Evaluation Module
options:
-d, --capture-dir Name of the director where to store recordings on the DSP board
-p, --port Port number the DSP board server app is listening on
-i, --ip-addr IP Address of the MMWCAS DSP evaluation module
-c, --configure Configure the MMWCAS-RF-EVM board
-r, --record Trigger data recording. This assumes that configuration is completed.
-t, --time Indicate how long the recording should last in minutes. Default: 1 min
-f, --cfg TOML Configuration file. Overwrite the default config when provided
-h, --help Print CLI option help and exit.
-v, --version Print program version and exit.A default configuration is already implemented (as described below) and can be used.
ip: 192.168.33.180 # MMWCAS-DSP-EVM IP Address
port: 5001 # MMWCAS-DSP-EVM server port
time: 1 # Recording time in minIf the DSP board has been reconfigured with another IP address, you can provide the new
IP address in argument with the --ip-addr CLI option.
To record data, the typical command is:
mmwave -d <directory> --configure --record --time <duriation-in-minute>
# Exmaple
mmwave -d outdoor0 --configure --record --time 10With this command, the radar chips are configured with the default configuration implemented in the source code.
# Default MIMO Configuration
#
# - Max Range : 80 m
# - Range resolution : 30 cm
# - Max velocity : 6.49 km/h
# - Range resolution : 0.4 km/h
#
profile:
id: 0
startFrequency: 77 # GHz
frequencySlope: 15.0148 # MHz/us
idleTime: 5 # us
adcStartTime: 6 # us
rampEndTime: 40 # us
numAdcSamples: 256 # ADC Samples per chirp
rxGain: 48 # dB
frame:
numLoops: 16 # Number of chirp loops per frame
numFrames: 0 # Number of frames to record. 0: Infinte framing
framePeriodicity: 100 # ms
channel:
rxChannelEn: 0xF # RX Channels enabled
rxChannelEn: 0x7 # TX Channel enabled
dataFmt:
iqSwapSel: 0 # I firstIf the capture directory is not indicated (with the -d option), the capture folder is
automatically created as MMW_Capture_<timestamp>; with <timesamp> is placeholder for
the Unix timestamp at which the command has been issued.
It's possible to define custom configurations suitable for a given recording setup
with TOML config files. Some examples of config files are present on the config
folder of this repository.
With a config file, one can use the command below:
mmwave -f <path-to-config-file> --configure --record --time <duration-in-min>
# Example
mmwave -f config/short-range-cfg.toml --configure --record --time 2With the MMWCAS-DSP-EVM board, recordings are saved on its embedded Solid State
Drive (SSD). To check that the recording has proceeded and is successful, you can
log over ssh onto the DSP board as follows:
# Use the IP address of the DSP board
ssh [email protected]
cd /mnt/ssd
ls -lIn the list of folders, you can then check for the name of the folder holding the recorded data and make sure that it contains some data.
To copy the files over Ethernet, one can use a secure copy program such as scp.
scp [email protected]:/mnt/ssd/<recording-directory> <path-to-local-storage>
# Example
scp [email protected]:/mnt/ssd/outdoor0 /home/user/rwu-radarThe structure of the repository is as follows:
.
├── config
│ └── short-range-cfg.toml
├── makefile
├── mimo.c
├── mimo.h
├── mmwave
├── opt
│ ├── opt.c
│ └── opt.h
├── README.md
├── ti
│ ├── ethernet
│ │ ├── docs
│ │ └── src
│ ├── firmware
│ │ ├── masterss
│ │ ├── radarss
│ │ ├── xwr22xx_metaImage.bin
│ │ └── xwr22xx_metaImage.h
│ ├── mmwave
│ │ ├── crc_compute.c
│ │ ├── mmwave.c
│ │ ├── mmwave.h
│ │ ├── rls_osi.c
│ │ └── rls_osi.h
│ └── mmwavelink
│ ├── docs
│ ├── include
│ ├── lib
│ ├── makefile
│ ├── makefiles
│ ├── mmwavelink.h
│ └── src
└── toml
├── config.c
├── config.h
├── toml.c
└── toml.hThe content of the folders ti/mmwavelink and ti/firmware must not be modified. Those
are respectively libraries and firmware provided by Texas Instruments and should not be
modified unless one knows what it's all about. Any update to those can be directly obtained
from TI or by copying them from the installation folder of mmwave studio and
mmwave dfp.
The folders ti/ethernet and ti/mmwave are based on examples source files provided by
TI. Since the original sources were only compatible with windows, these have been modified
to operate on Linux OS. One can update these modules to extend the capabilities of this driver.
- The folder
optholds the source handling the CLI option parsing - The
tomlfolder handles the parsing of configuration files. - The entry point of the program is in the
mimo.cfile.
NOTE: the files toml/toml.c and toml/toml.h have been authored by
cktan and released with an MIT license on Github at
https://github.com/cktan/tomlc99. Therefore, this reference is the perfect place to
seek for new updates of the TOML parser library.
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