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Software & tools for RS485-FL-DPLX-EVM

Wilson M.
Prodigy 20 points
Other Parts Discussed in Thread: RS485-FL-DPLX-EVM

Hi Everyone,

can someone help by providing me a software kit for the demo board RS485-FL-DPLX-EVM, I cannot find it on TI and I didn't received any CD with the boards

ordered. I need a kind of firmware sample (software kit) to properly evaluate the board.

Many thanks

br

  • 0
    TI__Guru 62910 points
    Hello,

    This EVM does not have a software component associated with it. It is just intended to be used for evaluation of RS-485 transceivers. You would need to interface the logic-level I/O of the chip (D, R, DE, and RE pins) to an existing system or to laboratory equipment like function generators or oscilloscopes. There are also jumpers on the board that could be used to pull the logic inputs high or low to fixed values.

    Best regards,
    Max
  • 0 in reply to Max Robertson
    Prodigy 20 points

    Hi Max,

    thanks for your reply, i still have a small issue, not sure to open a new topic or not but it is related to the same demo board.

    i want to test the communication with the pc, i bought a convertor (rs485 to usb), half duplex convertor.

    i connected A & Y together as the line +

    and the B & Z together as the line -

    with this configuration i m able to send data over to the pc but i can't receive data from the pc (meaning that my ISR is not triggered but the oscilloscope shows data being sent from the pc).

    NOTE: the pin D is set to logical High and RE to logical Low from the software and remain unchanged during the Tx and the Rx operation.  

    am i doing something wrong ?

    how to convert from the full duplex to half duplex ?

    Many thanks

    br

     

  • 0 in reply to Wilson M.
    TI__Guru 62910 points
    Are you trying to communicate between two different boards, or are you just looping back data on a single board so that the PC is receiving the same data it sent? If you are connecting two separate boards in a half-duplex link, you would need to control the DE lines independently at each transceiver to make sure that only one is active at a given time.

    If you are looping back on a single board, then you should verify whether the "R" output you are getting from the transceiver matches the "D" input to the transceiver coming from the converter. If so, then the transceiver is working properly and you may want to take a closer look into the converter and its associated software. (It may not be programmed to detect incoming data while it is transmitting, for example.)

    Best regards,
    Max