You may check if SerialIo protocol is generated on your platform. Serial driver
is loaded but may be not started.
You could run dh -p SerialIo in shell to check.
From: lowell_den...@dell.com [mailto:lowell_den...@dell.com]
Sent: Wednesday, August 20, 2014 5:48 AM
To: edk2-devel@lists.sourceforge.net
Subject: [edk2] How to use serial port (COM1) in EFI shell
All,
I have a system with a serial port on it over which I would like to send some
information.
This is a real serial port, not a USB to serial module.
The serial port works perfectly as COM1 in Windows7
When boot my USB key to FreeDOS it does not work right away.
If I use debug to write 0xF8 and 0x03 to 40:0 and 40:1 respectively then the
serial port works perfectly as COM1.
When I boot my USB key to the EFI shell (v2.0) I can see the serial driver is
loaded when I execute the "drivers" command, but the "sermode" command says "no
serial ports found".
Can anyone please help me to get serial communications working in the EFI shell.
Thanks,
Lowell Dennis
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