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IWR1443BOOST: Does LVDS in IWR1443BOOST EVM have video streaming mode support

vishnu vikash
Intellectual 355 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443, , AWR1243, IWR1642

Hi

I am trying to find, in LVDS what are all the modes get supported in IWR1443 BOOST EVM? Pls help me in finding these information .  

1) Particularly i want to know, Does LVDS have video streaming mode support in IWR1443BOOST EVM?

  • 0
    TI__Mastermind 37500 points
    The IWR1443 has an HSI LVDS interface, it is programmable. It is not a video format, it is either the standard Radar Rx complex data, or with specialized programming other data that is DMAed across the LVDS interface. The IWR1443 normally sends the Radar Rx , where 1 lane is used for each radar Rx (there are 4 Rx on the part). "training.ti.com/mmwave-sensor-raw-data-capture-using-tsw1400-board . There is training to capture this LVDS data on the EVM + Devpack + TSW1400 -> storage -> USB2, or EVM + DCA1000 -> Ethernet.

    The Technical Reference Manual (TRM) , swru 522, Section 13.

    The IWR1443 has an alternate format CSI-2 interface, in the same device. This has specific camera-like CSI protocols. This is still in section 13 of the TRM.

    You would look at the AWR1243 EVM, or IWR1443 EVM, the LVDS pins have shared pin names for CSI-2 or LVDS format. The different RAW8, 12,14 formats are special formats for the Radar Rx outputs, which are normally 16bits after the Digital Front End. In affect these round off the lower bits of I and Q.

    If you are trying to use the EVM, with TI capture, you would need LVDS. If you are using an EVM to logic analyzer or test equipment, you would get a Samtec HD60 cable with the connector on one end. Then you can use a MIPI protocol analyzer.

    Regards,
    Joe Quintal
  • 0 in reply to Radio-Joe
    Intellectual 355 points

    Hi Joe

    Thanks for your detail and quick response. Based on your explanation i have few more doubts here.


    Q1.) "The IWR1443 has an alternate format CSI-2 interface, in the same device. This has specific camera-like CSI protocols. This is still in section 13 of the TRM" ?

    I have gone through section 13 in TRM, where i find it is mentioned that "CSI-2 support only command mode".

    So CSI2 support only command mode or it also support other mode such as streaming mode  or Video mode.

    Q2.) Now let us assume that CSI-2 support only command mode in IWR1443 , Like this, is there any limitation on LVDS ?

    I want to know Does LVDS support mode similar to streaming or video mode in IWR1443 ?

  • 0 in reply to vishnu vikash
    TI__Mastermind 37500 points
    Hello,
    When I have used the LVDS interface, it sends data continuously for the active Rx, in the Chirp, and then Chirps in the Frame.
    In that sense it is a streaming or video interface. If you wanted to compress the data stream, this would be done in the DSP or ARM processor before DMAing the data to the CSI interface.

    If you download the mmwave Studio, this interfaces from the IWR1443, or IWR1642 to the DCA1000 (or TSW1400) capture solution. Once you program the device, it sends out the mmwave Rx DFE output for the number of frames requested. The DCA1000 link is www.ti.com/.../DCA1000EVM.

    LVDS is the physical layer. The CSI formats the data, the DMA/EDMA sends the data to CSI. You could create a by exception update (command based) or streaming mode. The default is streaming.

    Unfortunately you will need the mmwave studio pack software (free), but the Devpack and TSW1400 or DCA1000 are not free boards.
    There is TSW1400 data capture training under the mmwave training that explains this further.

    Regards,
    Joe Quintal
  • 0 in reply to Radio-Joe
    TI__Mastermind 37500 points
    Hello,
    There is a new application note for LVDS that has been released. This does not discuss command or streaming. The standard mode based on DMA of Radar Rx data is streaming. www.ti.com/.../swra581a.pdf

    Regards,
    Joe Quintal