IWR1443BOOST: TDMA Configuration

Spencer

Part Number: IWR1443BOOST
Other Parts Discussed in Thread: DCA1000EVM, IWR1443

Context: I am sending a configuration to the IWR1443BOOST which then sends the raw samples to the DCA1000EVM and then to my computer. I am not using mmWave studio but instead interacting through ROS.

I have been trying to get a simple TDMA configuration set for the IWR1443 and I am having some issues. I get an error that implies that the configuration is incorrect. The configuration I am using is:

["flushCfg",

"dfeDataOutputMode 1",

"channelCfg 15 5 0",

"adcCfg 2 1",

"lowPower 0 1",

"profileCfg 0 77 20 5 80 0 0 40 1 256 7000 0 0 30",

"chirpCfg 0 0 0 0 0 0 0 1",

"chirpCfg 1 1 0 0 0 0 0 4",

"frameCfg 0 1 128 0 100 1 0",

"testFmkCfg 0 0 0 1",

"setProfileCfg disable ADC disable"]

My intention is to have two chirps, one from antenna one and one from antenna three.

Is there a demo for TDMA (a specific configuration I can test just as above) or do you have any suggestions for my current config?
I am curious about the delay between chirps within the same loop instance. Say I have two chirps, one after the other that I repeat many times. Can I assume there is no delay between the end of the first chirp and the beginning of the second chirp? Should I add non-zero idle time in the second chirp config?

over 5 years ago

0 Vaibhav Mahimkar over 5 years ago

TI__Mastermind 23725 points

Hello,

The mentioned TDM configuration can be easily achieved using the Chirp settings. Infact most of the demos for IWR mmWave devices use TDM confguration where at a time only one Transmistter is active.

Please check the following:

Programming Chirp Parameters in TI Radar Devices for chirp programming of RF section on device.

MMWAVE STUDIO User Guide for using the chrips settings via the Studio Tool.

Thank you,

Vaibhav

0 Spencer over 5 years ago

Prodigy 90 points

I must have been violating some limit (perhaps time or memory). The code below runs on the board.

["flushCfg",
"dfeDataOutputMode 1",
"channelCfg 15 5 0",
"adcCfg 2 1",
"lowPower 0 1",
"profileCfg 0 77 20 5 80 0 0 40 1 256 7000 0 0 30",
"chirpCfg 0 0 0 0 0 0 0 1",
"chirpCfg 1 1 0 0 0 0 0 4",
"frameCfg 0 1 64 0 20 1 0",
"testFmkCfg 0 0 0 1",
"setProfileCfg disable ADC disable"]

0 zigang Yang over 5 years ago

TI__Mastermind 40335 points

HI,

It seems that total radar cube is bigger than L3 memory. The radar cube size can be calculated as:

numADC * numLoop * numTX Ant* numRXAnt * 4

And in your case is 1MByte, which is too big for IWR1443. You can try to reduce the number of loop by half to see whether it passes.

For the second question, you can assume that there is no delay between the first chirp and second chirp. The idle time is always nonzero, so you always has some idle time in between.

Best,

Zigang

Sensors

Sensors forum

IWR1443BOOST: TDMA Configuration