DCA1000EVM: How to cpnfig and use Tx0 &Tx1?

user5907403

Part Number: DCA1000EVM

We want to get the Multi-channel raw data. We use the AWR1642BOOST and DCA1000EVM. we successfully connected the device .

we can get the raw data when just Tx0 work（Can verify that the data is correct）, but I want to get 8 channels' raw data use the Tx0 &Tx1, I don't know how to config the sensor configuration？？ I tried it a few times， but the time domin plots are wrong(the real and imag parts are constant):

I guess it may be due to incorrect profile ID and Tx configuration,But I can't find instructions，I would be very grateful if someone can help me.My configuration parameters are as follows:

over 5 years ago

0 Cesar over 5 years ago

TI__Guru*** 140754 points

Hi,

Are you trying to use MIMO with Tx0 and Tx1 ?

If yes, do the following for "Chirp" configuration

First:
"Start Chirp for Cfg = 0
End Chirp for Cfg = 0
Tx Enable for current chirp = Tx0
Set"

Second:
"Start Chirp for Cfg = 1
End Chirp for Cfg = 1
Tx Enable for current chirp = Tx1
Set"

0 Anand Gadiyar over 5 years ago

TI__Genius 14705 points

Hi,

In your screenshot, in the Frame Configuration groupbox, it looks like you have "Test Source Enable" selected.

Can you please uncheck that box and capture data again? This should likely solve your issue.

Best Regards,
Anand

0 user5907403 over 5 years ago in reply to Anand Gadiyar

Intellectual 370 points

Thank you for your answer!

I try it again with your suggestion, but when uncheck the 'Test Source Enable',the output display interface will show the 'The Test Source is disabled' when I click the'set'!

So,what should I do to solve this problem?

Looking forward to your answer !

0 user5907403 over 5 years ago in reply to Cesar

Intellectual 370 points

Thank you for your answer!

I try it again with your suggestion, but the time domin plot is still the constant!

So,what should I do to solve this problem?

Looking forward to your answer !

0 Cesar over 5 years ago

TI__Guru*** 140754 points

Please review the steps you are using to program the mmwave studio.

Based on your input it looks that the EVM is working. So it is probably a config problem.

Thank you
Cesar

0 Anand Gadiyar over 5 years ago in reply to user5907403

TI__Genius 14705 points

That's correct - the "Test Source is Disabled" message is expected. There is no problem here.

Please capture the data with the checkbox unchecked and check again.

0 user5907403 over 5 years ago in reply to Anand Gadiyar

Intellectual 370 points

In other words, the EVM can work normally when I ignore the prompt message in the output window?
I want to know what the role of this button is？

0 Anand Gadiyar over 5 years ago in reply to user5907403

TI__Genius 14705 points

Hi,

The EVM is working normally in both cases.

The test source is a feature in the device that allows you to provide deterministic data for the purpose of testing the data collection path. This test source emulates up to 2 objects at a configurable position and velocity and signal level. This feature is usually used during bringup of a board, and also for checking if the device interfaces are working correctly.

During normal operation, the test source should be disabled.

Best Regards,
Anand

0 user5907403 over 5 years ago in reply to Cesar

Intellectual 370 points

Thank you for your help! This problem has been solved!

Although data can be acquired, after reading by MATLAB, it is found that half of the channels are missing, only four channels.

I am sure I select both Tx1&Tx2 in StaticConfig, and then Follow your steps set the "Chirp" configuration .

The config: 200chrips*500frames*256samples=25600000,The raw data read is as follows：

So it only have 4 channels raw data,why? help me,thank you !

The MATLAB code reference is：

0 Anand Gadiyar over 5 years ago in reply to user5907403

TI__Genius 14705 points

Hi,

Your observation is as expected.

There are only 4 RXs, and each "channel" corresponds to data from one RX. Normally, the RXs are always active for every chirp; i.e., if you configure chirps to have 256 samples, then every chirp will result in 256*4 samples of data, with 256 samples being acquired by each RX.

Best Regards,

Anand

0 user5907403 over 5 years ago in reply to Anand Gadiyar

Intellectual 370 points

Thank you for your help, this problem has been solved！

I want to ask you some other questions:

1.How to get the post-processing MATLAB program given by the software mmwave studio PostProc?

2.When there is no hardware connection with the software mmwave studio,Whether post-processing software is not available?

3.Whether the system is De-Chrip mode or Quadrature demodulation mode？

0 user5907403 over 5 years ago in reply to Anand Gadiyar

Intellectual 370 points

About the raw data,I hava another question:

The 4*25600000 raw data I get below, I used 2 Txs, So how can I know the which part raw data come from Tx1 and which part raw data come from Tx2?

0 Anand Gadiyar over 5 years ago in reply to user5907403

TI__Genius 14705 points

Hi,

1. I'm afraid we do not currently release the source for the post processing program.

2. The post processing might work without a hardware connection, but this has not been extensively tested.

3. I will get back to you shortly on this.

Best Regards,

Anand

0 Anand Gadiyar over 5 years ago in reply to user5907403

TI__Genius 14705 points

On your question on how to know which part of the raw data comes from TX1 and which part comes from TX2: this depends on your chirp configuration. If you are using a TDM-MIMO configuration where you have one chirp using only TX1 and one chirp using only TX2, then you will have alternating chirps with TX1 and TX2 data.

In general, please refer to our application note on MIMO for more information:

Best Regards,

Anand

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DCA1000EVM: How to cpnfig and use Tx0 &Tx1?