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How to use FET340UIF with eZ430-CC2560 (Spy-by-wire)?

Matthias Ringwald
Expert 1475 points

Hi all

I'd like to use the FET3410 to flash the boards from the eZ430-CC2560 kit as I cannot get the virtual serial port to show up on the Mac. The FET430UIF works more or less, and is supposed to support spy-by-wire and on the battery holder of the kit, there are nice 2.54 mm pads to solder a connector. Now, what connections do I need to make? The datasheet on the MSP-FET430UIF doesn't even have a pin-out of the JTAG cable. 

 

Could you post a quick explanation with labeled pictures?

 

Best

 Matthias

  • 0
    TI__Genius 9990 points

    Matthias,

     

    Could you clarify your question. What hardware do you want to use to program the EZ430-RF2560?

    BTW, there is access to JTAG using the uEVM connector on the back, as you can find in the wiki:

    http://processors.wiki.ti.com/index.php/EZ430-RF2560

     

    Regards,
    Gustavo

  • 0
    TI__Genius 9990 points

    Matthias,

     

    For access to Spy-Bi-Wire from JTAG, you need the following lines:

    VCC

    TST

    RST

    GND.

    Gustavo

  • 0 in reply to Gustavo L
    Expert 1475 points

    Hi.

    Ok, I try again.

    I want to program the "Target Board" of the eZ430-rf2560 kit (http://www.ti.com/tool/ez430-rf2560) using the msp-fet430uif (http://www.ti.com/tool/msp-fet430uif) over the Spy-by-Wire pins available at the battery holder of the eZ430-rf2560 kit as I cannot get the provided eZ430-FET to work on the Mac.

    I've seen the uEVM connector, but I have nothing to solder there and I'm also not confident that I would be able to solder that. The Spy-by-wire pins on the battery holder are normal 2.54 mm through-hole pads - I can solder those.

    Basically, I (and everyone else) is missing the pin out of the JTAG port on the msp-fet430uif. The datasheet shows how to connect the target but doesn't give the JTAG pinout.

    Thanks

     Matthias

  • 0 in reply to Matthias Ringwald
    TI__Genius 9990 points

    Matthias,

    You can see an example of pinout on any experimenter board:

    Take a look at  here:

    http://www.ti.com/litv/zip/slac228

     

    Open the files in Eagle: www.cadsoft.de  and you can see the orientation in which the cable will fit and which pins are what.

     

    Regards,
    Gustavo

  • 0 in reply to Gustavo L
    Expert 1475 points

    Gustavo

    good idea.

    So, the schematic is

     

    And the snippet from the board is 

     

    So, PIN 1 is the rightmost in the upper row, when looking at the JTAG connector from the frontside and I'll need Pins: 1 TDO/TDI, 8 TEST/VPP and 9 GND. Plus Pin 4 VCC Target, if I want to power the target too.

    Add on question: do I need the R1 47k Ohm resistor between VCC (pin 4) and TDO/TDI (pin 1)? It looks like it would be part of a normal Reset circuit? 

  • 0 in reply to Matthias Ringwald
    Expert 1475 points

    Just wanted to confirm that the proposed solution actually works using the schematic that was pointed out earlier. I used JTAG pin 2 to power the target board and left out the fuse blowing stuff, as explained in the notes.

    I've also connected the Debug UART to an FTDI USB-2-UART which isn't limited to 9600 as the original eZ430 FET.