[U-Boot-Users] Choosing serial port for TQM860L
Hi,
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).
When running VxWorks on the same board, again the console is X19 connector. It is COM1 for the VxWorks.
However,
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.
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?
Thanks,
Rami.
In message 3B4CA12D75E3144FBABEEF6CABFD4E1851124C@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
participants (2)
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Rami Segal -
Wolfgang Denk