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DM8127 uart issue

tejas patil
Expert 1090 points

Hi,

I am using DM8127 custom board. I am using UART1 port loop back  ttyO1

echo "Hello" > /dev/ttyO1;cat /dev/ttyO1 nothing on output ??

BR

Tejas

Quote

  • 0
    Guru 117855 points

    Is this the right place to advertise my, "car for sale?"

  • 0 in reply to cb1_mobile
    TI__Guru**** 170625 points

    This e2e thread was moved in the correct forum now (DM814x).

    Tejas,

    Could you check if the below e2e threads will address your issue?

    http://e2e.ti.com/support/embedded/linux/f/354/t/336964.aspx

    http://e2e.ti.com/support/embedded/linux/f/354/t/55409.aspx

    Regards,
    Pavel

  • 0 in reply to Pavel Botev
    Expert 1090 points

    Hi pavel,

    1. 6 UART in TI81xx. I am using 4 UART'S UART1,3,4,5

    UART1 is ttyO1,ttyO3,ttyO4,ttyO5 how to configure this uart 3,4,5

    # dmesg | grep UART
    omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
    omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
    omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
    omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3
    omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4
    omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5
    # echo "UU" > /dev/ttyO1
    # cat /dev/ttyO1 &
    #

     TX & RX short (loopback) no output on console. any missing ?

    I was check pin muxing  UART1, & UART3 also.

    BR

    Tejas