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MSP-ISO: HW vs. SW UART options by using isolation board

superpanky
Prodigy 250 points
Part Number: MSP-ISO
Other Parts Discussed in Thread: MSP-EXP430G2ET, , EVM430-F67641, MSP430G2553, ENERGIA

Hi.

I am using MSP-ISO isolation board with MSP-EXP430G2ET Launchpad to connect it to EVM430-F67641 through RS-232.

Question: can isolation board jumpers be placed in both HW UART and SW UART positions as in normal case on the Launchpad without isolation board ?  (vertically and horizontally)

Regards, Superpanky

  • 0
    TI__Mastermind 39320 points

    Hello Superpanky,

    Looking at the schematic, it looks like neither option would work with the MSP-ISO on the MSP-EXP430G2ET.  Because of the way the pins are layed out on this specific launchpad, the signals would bypass the isolation.  You can find the schematic below.  The MSP-ISO would only work on launchpads that keep all target pins on 1 side of the header and all host pins on the other side.  I also notified the launchpad team to add this to the documentation.  

     

  • 0 in reply to Eddie LaCost
    Prodigy 250 points

    Hello, Eddie

    Yes, I see what you are talking about. However it seems confusing, because I had another thread, where James Evans confirmed, that this Launchpad should work with this ISO board.



    What do you think about this? And how should I work with it then?

    Regards, Superpanky

  • 0 in reply to superpanky
    TI__Mastermind 39320 points

    Hello,

    I talked with James about this.  It sounds like you are trying to use the G2 launchpad as a backchannel UART only to communicate from the F67641 to the PC.  is that correct?  If that is the case, there is no need to connect anything to the MSP430G2553 at all.  You could actually remove the chip entirely off that board.  Because of the way the G2 UART is wired at the header, I think your best bet would be to use jumper wires coming from the UART of the F67641 into the isolation board, then jumper wires from the isolation board to the G2 J101 header.  To use the backchannel UART on the G2 J101 header, pin 6 and 7 should be used as RXD and TXD.  Hopefully this helps.   

  • 0 in reply to Eddie LaCost
    Prodigy 250 points

    Actually I replaced my old G2 to a new G2ET as James suggested.

    Does it make big changes in connections?

    Eddie LaCost said:

    It sounds like you are trying to use the G2 launchpad as a backchannel UART only to communicate from the F67641 to the PC.  is that correct?

    My goal is to dublicate the display of F67641. First of all I plan to do this through PC - that I would be able to see everything on both displays and also on my PC screen (for example, in Serial Monitor of Energia). In the end, of course, PC will be disconnected and there will be just doubled display working.

  • 0 in reply to superpanky
    TI__Mastermind 39320 points

    I was referring to the G2ET schematic in my previous post.  It is always good to double check the schematic on your side as well though.

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