How to output system debugging information from j17?

Default output from uart0 of j21,how to output system debugging information from j17!

Hi webhack,

Please see if https://devtalk.nvidia.com/default/topic/1001113/jetson-tx2/flow-control-on-serial-console/ helps.

Additional note…this might also apply:
https://devtalk.nvidia.com/default/topic/1025894/jetson-tx2/uart1-acts-as-default-debug-port-on-tx2-r28-1/post/5220368/#5220368

Keep in mind that U-Boot and the Linux kernel must be set up separately to use the same driver and UART port. U-Boot will use the right driver by default (non-DMA) if you change the port, but the Linux kernel must be told, via device tree that “compatible” does not include any “hsuart” (“hs” is “high speed”, which in turn implies DMA, and this would break output as the UART has to be restarted with a new driver since U-Boot doesn’t have a DMA-capable driver).