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Can F28069 SCI-A boot support RS485(Half duplex) communication?

ay0689_3
Expert 1085 points

Hello,

we are planning to update our F28069 based equipment by using SCI-A bootloader via RS485 Half-Duplex communication.

Does SCI-A bootloader on F28069 support Half duplex communication between PC and C28x?

TMS320x2806x Piccolo Technical Reference Manual on Page 220 describes as follows,

After each data transfer, the 28x will echo back the 8-bit character received to the host. In this manner, the host can perform checks that each character was received by the 28x.

Best regards,

ay0689

  • 0
    Guru 192875 points

    Hi Ay,

    ay0689_2 said:
    After each data transfer, the 28x will echo back the 8-bit character received to the host. In this manner, the host can perform checks that each character was received by the 28x.

    This is meant only if the checks have to be performed. You should be able to communicate using half duplex mode.

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    TI__Genius 13875 points
    Dear Gautam
    Do you mean if the check is not performed, the half duplex mode on F28069 SCI-A bootloader is working?
    Thanks for your confirm.
  • 0 in reply to Jefferey
    TI__Mastermind 30255 points
    Hello,

    The SCI boot can be used in half duplex communication. The C28x is going to echoback what is sent once autobaud lock occurs but the host can choose not to read that echoback (or have it wired up all). Just have to be careful not to overload the C28x.

    Best Regards
    Chris