[MinnowBoard] UART ports configuration issues

[Orozco, Edgar Alexis]

Hello...

When I try to read or write to the ports ttyS1 or ttyS2, I get an input/output error.

That's basically it.


-----Original Message-----
From: elinux-MinnowBoard [mailto:elinux-minnowboard-bounces at lists.elinux.org] On Behalf Of John Hawley
Sent: lunes, 01 de junio de 2015 04:25 p.m.
To: elinux-minnowboard at lists.elinux.org
Subject: Re: [MinnowBoard] UART ports configuration issues

On 06/01/2015 12:42 PM, Orozco, Edgar Alexis wrote:
> Hello everybody!
>
>
>
> I am experiencing an issue with UART ports: here's the output of
> setserial -ag /dev/ttyS*
>
>
>
> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
>
>                 Baud_base: 115200, close_delay: 50, divisor: 0
>
>                 closing_wait: 3000
>
>                 Flags: spd_normal skip_test auto_irq
>
>
>
> /dev/ttyS1, Line 1, UART: unknown, Port: 0x02f8, IRQ: 3
>
>                 Baud_base: 115200, close_delay: 50, divisor: 0
>
>                 closing_wait: 3000
>
>                 Flags: spd_normal skip_test auto_irq
>
>
>
> /dev/ttyS2, Line 2, UART: unknown, Port: 0x03e8, IRQ: 4
>
>                 Baud_base: 115200, close_delay: 50, divisor: 0
>
>                 closing_wait: 3000
>
>                 Flags: spd_normal skip_test auto_irq
>
>
>
> /dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3
>
>                 Baud_base: 115200, close_delay: 50, divisor: 0
>
>                 closing_wait: 3000
>
>                 Flags: spd_normal auto_irq
>
>
>
> ttyS0 is working OK since I am using it as a serial console.
>
> I noticed that the dmesg output was commonly showing "ttySX MMIO at
> 0x<address>". Not anymore!.
>
> I thought it was related to a BIOS configuration (just like Intel
> NUC's)... but I was not able to find something related to it.
>
>
>
> Any thoughts ?
>
> Thank you very much!

Can you just copy paste what it was showing exactly, it's not really clear to me what the problem is or what the error message that's getting reported is...

- John 'Warthog9' Hawley
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