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Communicate with the DSP Application

Heiko
Prodigy 20 points


Hi,

I'm new with C5505 eZDSP USB Stick and I need a solution to write and send some parameter information to my application.
Maybe the FT2232-Chip could be used on channel B, but how can I do this?

Or do I have to use the UART on the extension port?

Thank you!

 

  • 0
    Intellectual 270 points

    Hi Heiko,

    I am also a newbie, but I found the following during my basic research: http://tiexpressdsp.com/index.php/XDS100#Q:_Can_I_use_port_B_as_a_UART.3F

    So basically it should be possible to use port B as UART, but I didn't try.

    Hope it helps,

    Raphael

  • 0 in reply to Raphael19557
    TI__Mastermind 30140 points

    Hi Heiko and Raphael,

    I am afraid you cannot use port B of the FT2232D chip to communicate with the C5505 eZdsp USBStick.

    Port A is wired to the JTAG interface and Port B is not connected.

    See the C5505 eZdsp Schematic as well as the FT2232D Datasheet.

    Hope this helps,

    Mark

  • 0 in reply to Mark M
    Prodigy 20 points

    Hi Raphael and Mark,

    thank you for your reply. So the easyest way to communicate with the DSP application at runtime would be to connect the UART over the extension port. - So, I have to order a extension port socket for the board.

  • 0 in reply to Mark M
    Prodigy 180 points
    Sorry for resurrecting an ancient thread, but i figured others might have interest in this.

    After looking at the schematic it appears that all that is needed (hw-wise) is to mount the missing resistors R75 and R79 (i used 100Ω). I did this, and it works; i got the c5505 uart working via ftdi and to host.

    However, the debugger under ccs loose contact with the debug target as soon as i open the serial device */dev/ttyUSBn under linux. Likewise, if i open the serial device before launching the debugger, the debugger fails to program and debug the device. Is there a workaround for this?

    Regards,
    Mike