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AWR1642BOOST: how to calculate data size in AWR1642BOOST capture-demo, and if the tx and rx channel can be changed

user4087505
Prodigy 40 points
Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642

Hi, 

I found that in the AWR1642 capture demo, there is Memort capture procedure and Streaming over LVDS

Memory capture procedure introduces how to use CCS to get data from L3, the start address is gFrameAddress[0], data size is 0x20000

Streaming over LVDS introduces how to get data through LVDS

my question is:

1. how to calculate the data size?

2.the"Streaming more than 1 channel" is mentioned in Streaming over LVDS, can I change the reg like “channelCfg ” in the Memory capture procedure? in other words, if the capture_demo_script can be changed to add more rx or tx channel.

3.if I change the  rx or tx channel in memory capture procedure, how can I calculate the data size? just like question 1

  • 0
    TI__Mastermind 23725 points

    Hello,

    The Capture demo which is provided as part of mmWave SDK is an example of how Raw ADC data from device can be sent out over High Speed Interface ports such as LVDS.  When connected vis Code composer Studio data the initial data can be viewed at l3 location as you have noticed.

    Regarding question #1, #3 about the expected data size:

    Number bytes per chirp =  Num. of Bytes per sample * Num of Samples per chirp  * Num of Chirps in a Frame * Number of  Receivers enabled.

    Num of Bytes in a sample are based on the Data format selected.

    Please see the AWR1xxx Data Path Programmer’s Guide for example of Data structure collected for AWR16xx device.

    For question #2:

    Above values are based on the configuration file passed to the device while invoking the Capture demo. Modifying the config in terms on number od Receivers will vary the expected data size.

    Thank you,

    Vaibhav

  • 0 in reply to Vaibhav Mahimkar
    Prodigy 40 points

    Thank you so much!