Home Forums Software discussion Linux Kernel Debug UART on Espresso Bin

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This topic contains 2 replies, has 2 voices, and was last updated by  Amit 6 months ago.

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  • #1522

    Amit
    Participant

    Hi

    I have EspressoBin board. I can able to boot Mainline Linux over it and able to access it using primary UART via
    micro USB cabe.

    As per Linux as well as u-boot source , EspressoBin has two uart (one can be accessed via Micro USB).

    I wanted to how second Uart can be accessed , is there any specific way to connect to it , for Instance via GPIO’s
    or something like it ?

    Thanks

    #1539

    stappers
    Participant

    I wonder where that second UART is. I even doubt if it exists.

    I couldn’t find any sign of a second uart on Marvell Armada 3700LP (88F3720) hardware information.

    As per Linux as well as u-boot source , EspressoBin has two uart

    Please tell more about the software side of the second UART

    #1558

    Amit
    Participant

    Hi

    I was talking about uart1 that can be accessed via pin 24 and pin 26 on P9 GPIO header:

    http://wiki.espressobin.net/tiki-index.php?page=ESPRESSObin+GPIO+LED+blinking

    In Linux , its been supported via this patch:

    https://patchwork.ozlabs.org/patch/822320/

    Thanks
    Amit

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