[U-Boot-Users] Choosing serial port for TQM860L
Wolfgang Denk
wd at denx.de
Wed Dec 29 11:36:04 CET 2004
In message <3B4CA12D75E3144FBABEEF6CABFD4E1851124C at exchange2000.tera-chip.com> you wrote:
>
> When running the TQ monitor (MON8xx) on the TQM860L evaluation board,
> the serial console is X19 connector (the first to the edge of the
> board).
MON8xx supports both the SMC1 (X.18 = COM1) and SMC2 (X.19 = COM2)
ports; it automatically selects the port on which you "register" by
pressing enter (and as you probably know it also auto-bauds).
> When running VxWorks on the same board, again the console is X19
> connector. It is COM1 for the VxWorks.
I have no idea how you configured your port of VxWorks, and which
names you give to ports there.
> When we run Linux Das U-boot, the console is X18, the middle connector.
> According to the manual this is the way it should be and it is COM1
> again.
Correct. That's how it is configured: both U-Boot and Linux use SMC1
for the console port, thus you communicate through X.18 or "COM1".
> Can you please clearify the confusion? How can the monitor and vxworks
> be different from U-boot, regarding which connector is the default
> console? How can we change the serial port console for U-boot bring up?
This is just a configuration issue. If you want the serial console on
the X.19 conenctor (i. e. on the SMC2 port), then change the
configuration of U-Boot (#define CONFIG_8xx_CONS_SMC2 instead of
CONFIG_8xx_CONS_SMC1) and adapt the configuration of the Linux
kernel, too (enable CONFIG_CONS_SMC2).
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Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"Those who will be able to conquer software will be able to conquer
the world." - Tadahiro Sekimoto, president, NEC Corp.
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