[MinnowBoard] UART and COM ports problem

[Rouzanov, Ivan]

Anteja,

As far as I understand we have 2 UARTs but only one follows legacy COM-interface and the other one does not so Windows inbox driver serial.sys does not work with it so you only have one COM port.
(Basically COMx is just a symbolic link serial.sys creates to point to its device object, so if it does not service a device like in the case of the second HSUART, then it is not a COM-port).
If you need to use COM-port and have ability to debug, I'd suggest to use Ethernet for debugging and free up COM1 for your other needs.

I hope this helps.
Best regards,
Ivan Rouzanov.



Message: 3
Date: Wed, 24 Jun 2015 10:06:02 +0200
From: Anteja Vuk Macek <anteja.vm at dolotron.com>
To: EDK2 email list <edk2-devel at lists.sourceforge.net>,  MinnowMax
	Community <elinux-minnowboard at lists.elinux.org>
Subject: [MinnowBoard] UART and COM ports problem
Message-ID:
	<CAOPTR2BQg0h5KT8dogxr60t3++i4tCHPFchyo6qWqKYkqGWZhw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi all,

On MinnowMax I work  on Windows 8.1 with UART.
   In BIOS Setup I enable UART.   In  LSS & SCC Configuration menu in BIOS
Setup I enable : LSS HSUART #1 Support  , LSS HSUART #1 FlowCtrl  , LSS HSUART #2 Support  , and LSS HSUART #2 FlowCtrl .  But I don't know if I need to in BIOS Setup in Miscellaneous configuration  set  UART interface on  Super IO UART, for now I set  Internal UART for UART interface.
   I install Intel driver (
https://downloadcenter.intel.com/download/24228/Intel-embedded-drivers-for-Windows-8-1-32-bit-
)
and I got two UART controllers.

Problem :
  Problem is that I have only one COM port ( COM1)  and it is for debugging.  I looking in inf (iaiouart.inf ) file of driver for which device is , and I find APCI/INT33BC device.  The COM1 is device
APCI/PNP0501 .

What I need to do to get COM 2 device ?  I saw  BaseSerialPortLib 16550 module in  MdeModulePkg/Library for what it is this module.  Need I add some module for UART or Serial port in fdf (PlatformPkg.fdf ) file to get
COM2 device, or add  COM2  in ACPI_table? Where I can find ACPI_table in source of firmware?

Best regards,

Anteja