DCA1000EVM: What is the packet structure of lvds user figured data?

JinHyeong Kim

Intellectual 460 points

Part Number: DCA1000EVM
Other Parts Discussed in Thread: AWR1642,

hi,

I am streaming user define data through lvds and ethernet connection with AWR1642 and DCA1000EVM

What I've done is increase the number of user buffer table to enable sessionCfg.u.swCfg.userBufferInfo[0,1,2].

I let the [0] as default, and add my pre-defined data(at this time for test) at [1] and [2]

And with DCA1000EVM and lua script mentioned at https://e2e.ti.com/support/sensors/f/1023/t/759979

I watched streamed data using wireshark.

I have two question about this

1. I set the frame rate as 20fps when configuring AWR1642 (using demo visualizer to set frame rate when generating configuration file)

but when using UDP connection, I think it buffers data as long as data is full (maybe 1466 bytes). So frame rate of UDP communication is about 5 fps (By analyzing frame number, udp connection buffers about 4 frames at one packet)

Is there any method to send one frame per one udp communication?

2. When watching results from wireshark, DCA1000EVM not only send user data(lvds sw configurated) but also other data that i can not figure out.

At below image, first 20 bytes are my pre-defined user data. But after that something similar data separated mode identifier(0xadcdcaadccda)is shown and some other data are shown.

What does these data means? Could I remove all data except my user data sent from lvds?