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Activating UART3 on AM/DM37x reference board

Joe Hamman
Prodigy 10 points

Other Parts Discussed in Thread: AM3517

We are trying to reconfigure u-boot to use UART3 for the console device and not having any luck.  We have SW1-3 set to route UART3 to P21 and are booting from NAND flash.  We are guessing it is a clocking or I/O configuration we are missing.  Any help would be greatly appreciated.

Thanks,

Joe

  • 0
    TI__Expert 8180 points

    Joe,

    I think you are missing boot_uart signal here which actually controls UART3 mux (SN74CB3Q3257PW - U32), which in turn controlled through SW4 [8-9].

     

    And from software perspective, you can refer to AM3517 code and configuration which actually uses UART3 as console.

    Thanks,

    Vaibhav