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GUI connection to HVPSFB hardware

Francesco Musolino
Prodigy 160 points

Hi,

I downloaded the schematics of the controller and main power boards of the HVPSFB kit.

My question is about the GUI.  

I know that in order to connect the hardware to the GUI a 4 pin SCI to Serial port connection is needed. But looking at the HVPSFB schematics it seems  to me that no 4-pin connector is implemented on to the boards, there is just the USB connector. Moreover, no indication is given in the HVPSFB Kit Overview (QSG-HVPSB-Rev1.1.pdf document) and in SPRABR1 reference document.

How and where the hardware can be connected to the GUI?

Thank you very much

  • 0
    TI__Guru 57255 points

    Francesco,

    To be more precise: in order to connect the hardware to the GUI, a SCI connection needs to be made via GPIO28 and GPIO29 and a transceiver in needed in between.

    From a previous post you appear to be using a '4-wire serial cable' to connect you computer to a Docking Station.  These 4 signals route through the Docking Station to the controlCARD.  Here they go through a transceiver and eventually make it to GPIO28 and GPIO29.

    In several boards (including the HVPSFB kit), the path from computer to GPIO28/GPIO29 is different.  On the HVPSFB board in particular, a USB cable is attached to the controller card via [M2]-JP1.  The FT2232 then does two things: 1) translates the USB input to JTAG when debugging is used; 2) translates the USB input to UART/SCI via a virtual comport that is generated by the FTDI's driver.  This second communication stream eventually makes it to GPIO28/GPIO29.

    Hopefully this clears things up some.

    (note that the Docking Station itself also provides an option to connect it's FTDI chip to the controlCARD via UART/SCI.  Some jumpers would need to be placed and some switches moved around though)


    Thank you,
    Brett

  • 0 in reply to Brett Larimore
    Prodigy 160 points

    Thank you very much Brett,

    your explanation is very clear to me. 

    Regards

    Francesco