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Uart speed does not change when loading uboot. The variable "baudrate" has no effect.

Added by Roman Kochkin 10 months ago

The baudrate of the UART port when loading uboot does not depend on the value from the environment variable "baudrate" and is determined only by CONFIG_BAUDRATE. The rate can only be changed in the local session using the "setenv" command. The next time you reset, uboot will take the rate from CONFIG_BAUDRATE. "config set" has no effect too.
Have to recompile to change rate.
Board mityomapl138.


Replies (1)

RE: Uart speed does not change when loading uboot. The variable "baudrate" has no effect. - Added by Jonathan Cormier 9 months ago

It is unusual for a design to change its debug UART's baud rate dynamically. The majority of our designs use the 115200 baud rate. If your design needs a different baud rate, I would rebuild u-boot and change CONFIG_BAUDRATE and change the bootargs so the kernel also uses the new baudrate.

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