AWR1642: There is a problem about increasing the chirps in each frame .

Xiao Du

Part Number: AWR1642

For my project , I want to make 2048 chirps in each frame , but the SDK1.1.002 only allow 512 chirps for one frame.So my code is like that

and the numAdcSamples is 32 for a chirp ,but when I Debug it , the EDMA transfer error, if I set framecfg->numLoops = 3 , everything is alright.

Is there any restriction on the EDMA transmission

over 7 years ago

0 Michelle Liu over 7 years ago

TI__Genius 11405 points

Anist,

Just to let you know that we are looking into your question.

Regards,
Michelle

0 db_woodall over 7 years ago

TI__Mastermind 21025 points

If I may ask, what is your goal in having 2048 chirps per frame? I need to dig into it a bit deeper, but my initial thought is that you're blowing out the radarCube memory. How many unique chirps have you defined? With so many chirps per frame, your frame rate must be rather low. I wonder if you can achieve the same goal with far fewer chirps per frame and a higher frame rate.

0 Xiao Du over 7 years ago in reply to db_woodall

Intellectual 410 points

Having 2048 chirps per frame is to Improve the range resolution , with less ADC samples per chirp , the radarCube memory should be enough for that ? I have tried fewer chirps per frame by using advframe , but when the numDopplerBin of 1D_OUT_PING or 1D_OUT_PONG is 2048 , the EDMA will run error.

0 db_woodall over 7 years ago in reply to Xiao Du

TI__Mastermind 21025 points

What resolution are you trying to achieve? Perhaps you could take a look at the High Accuracy Range demo here:

http://dev.ti.com/tirex/#/?link=Software%2FmmWave%20Training%2FLabs%2FHigh%20Accuracy%20Range%20Measurement%20-%2016xx

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AWR1642: There is a problem about increasing the chirps in each frame .