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TLV320DAC3203EVM-K: Is it possible to use the USB-MODEVM Interface board alone, to test an own prototype?

gustavo zarba
Expert 1110 points
Part Number: TLV320DAC3203EVM-K
Other Parts Discussed in Thread: TLV320DAC3203

Tool/software:

Dear people,

I am aware, the TLV320DAC3203EVM-K can be used with external signals like one can read on the user's guide:
2.4 Digital Signal Connections
The digital inputs and outputs of the EVM are monitored through P12 and P22. If external signals are connected to the EVM, digital inputs must be connected through J14 and J15 on the USB-MODEVM and the SW2 switch must be changed accordingly (see Section 2.2.1). The connector details are available in Section A.2.

However, I cannot find anything related to the possibility of testing my own board using only the USB-MODEVM Interface board and, whith it, also the GUI.

Before I burn my EVAL by making wrong connections, I would like to hear from you if this is really possible and what should I do for it.

Many thanks in advance, as always!

Sicerely,

Gustavo

  • 0
    Expert 1110 points

    In other words:

    If I connect my board to the USB-MODEVM on J12, J17 and J18 to the pins carrying MCLK, SDA. SCL, RESET, and the voltages I need plus the GND's, would the USB-MODEVM  work and would I be able to use the GUI too?
    Silly question, when I give my own answer, but one never know if something else is to be taken into consideration.

    Best regards,

    Gustavo

  • +1 in reply to gustavo zarba
    TI__Mastermind 26125 points

    Hi Gustavo,

    From a hardware perspective I think this is fine. I'm not too sure about the GUI working. My concern is that your software setting is now completely different. You might be able to still use it as a I2C controller and do manual commands but I'm not certain it will work like that.

    As long as the voltages given to the device are correct, I don't think you're in any danger of damaging the device this way. I say you're welcome to try it out.

    Best regards,
    Jeff McPherson

  • 0 in reply to Jeff McPherson
    Expert 1110 points

    Hi Jeff, thank you for the answer.

    Sorry, I am now editing this post, because the situation changed:

    I did try.
    But the GUI says: EVM disconnected.
    I see, the GUI is checking first on the EEPROM on the EVM-board. There is the firmware.
    Hmmm...

    There is, however a way, if I change the setting of SW1 on the EVAL in a way that not I2C but SPI is allowed.
    As far as I can see on the schematic, the I2C is reaching the EEPROM before this switch.
    I succeeded on fooling the USB-Board on this way. It now "sees" the EVAL, but cannot communicate with the  TLV320DAC3203 and I can use my board after the first check.

    On the other hand, I gave a try the other way around, connecting the EVAL as stand-alone and getting voltages and I2C commands from my MSP device.
    Same problem as by my board.

    I know, the commands, which I worked out with the unvaluable help of Ivan Salazar, are fully functioning on the EVAL.
    I suspect my own I2C software on the MSP430 is not doing a good job.

    Comparing the way those commands are sent by the USB-Board and mine, I see they are things I could do better.

    I will correct this first and come back if I have some more questions.

    Best regards and again thanks for the help,

    Gustavo