TX2 couldn‘t print boot log

Gooddays everyone
I installed minicom and connected the J21 6.8.10 pin of the TX2 board. In addition, I set the parameters as ttyS0, 115200, 18N, but when I boot the board it cannot print the boot log. I just want to know the process of u-boot to optimize it. Thanks

Which connector on the TX2 did you use? It should be the J21 connector with a 3.3V logic level.

Minicom has been around for a very long time, and originated when people used modems. As such it has a lot of modem init features which might not always do what you expect. I’ll recommend you try with “gtkterm” (“sudo apt-get install gtkterm”). Assuming your serial port on the host PC is “/dev/ttyUSB0”:

gtkterm -b 8 -t 1 -s 115200 -p /dev/ttyUSB0

Also, are you certain you are using the correct “/dev/tty#” on the host PC? I recommend verifying by monitoring “dmesg --follow”, and then see what shows up as you plug in the USB side to the host PC.

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I use J21 3.3v connector and ttyS0 of TX2 board but I forgot to chose the port of host machine. Maybe I set the wrong port . Thank you.