Re: SerialDxe with BaseSerialPortLib16550 and standard PC com port

["Kinney, Michael D" <michael.d.kinney@intel.com>]

What are the PCDs settings you are using for the
SerialPortLib?

Thanks,

Mike

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org]
> On Behalf Of Jacob Burkholder
> Sent: Tuesday, March 19, 2019 7:06 PM
> To: edk2-devel@lists.01.org
> Subject: [edk2] SerialDxe with BaseSerialPortLib16550 and
> standard PC com port
> 
> Greetings!
> 
> I had trouble using SerialDxe.efi with
> BaseSerialPortLib16550 on a standard
> PC com port (com1).  The PC is an asrock motherboard
> running whatever EFI
> bios it came with.  I changed MdeModulePkg.dsc so that
> BaseSerialPortLib16550 would be used instead of
> BaseSerialPortLibNull and
> then rebuilt SerialDxe.efi and loaded and started it
> using
> BootServices->{LoadImage,StartImage}.
> 
> Output works but input doesn't work, typed characters
> aren't received by
> the uart.  I looked at the code briefly and it seems like
> the uart isn't
> initialized properly.  I used this script to get input
> working (the
> commands should be self explanatory, they're not efi
> shell commands though):
> 
> image SerialDxe.efi
> outb 0x3fb 0x83
> outw 0x3f8 1
> outb 0x3fb 0x3
> outb 0x3fc 0x3
> 
> Any chance it can be fixed upstream?
> 
> Thanks,
> 
> Jake
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