# How to disable TCU0 UART port from being used for Serial console

**URL:** <https://forums.developer.nvidia.com/t/how-to-disable-tcu0-uart-port-from-being-used-for-serial-console/155304>\
**Category:** Jetson Xavier NX\
**Tags:** uart, board-design\
**Created:** [September 25, 2020, 9:07am UTC](https://forums.developer.nvidia.com/t/how-to-disable-tcu0-uart-port-from-being-used-for-serial-console/155304 "2020-09-25T09:07:20Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![yash.j](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@yash.j](https://forums.developer.nvidia.com/u/yash.j)\
**Post date:** [September 25, 2020, 9:07am UTC](https://forums.developer.nvidia.com/t/how-to-disable-tcu0-uart-port-from-being-used-for-serial-console/155304/1 "2020-09-25T09:07:20Z")

</div>

Hi all,

1. I was able to use /dev/ttyTHS1 for sending Radar Data.  
But still accessing GPIO 526 on Xavier NX i.e., pin with Ball name : SOC\_GPIO42 is a mystery.

2. I have dedicated /dev/ttyTCU0 for communicating with Radar interface by disabling debugging console operations on the port by default.

Changes in Linux\_for\_Tegra/Xavier\_NX/p3668.conf.common :  
line 106 : ##CMDLINE\_ADD=“console=ttyTCU0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0”;

Linux\_for\_Tegra/Xavier\_NX/flash.sh :  
line 1298 : #CMDLINE\_ADD=“console=ttyS0,115200n8”;

Note : In this case I’m facing issue of board entering into Bootloader Shell Mode. Any information on turning off Debug Console port and act as normal Uart port would be of great help.

Thanks…

---

<div class="post-metadata">

**Author:** ![JerryChang](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/jerrychang/32/14043_2.png) [@JerryChang](https://forums.developer.nvidia.com/u/JerryChang)\
**Post date:** [October 5, 2020, 8:36am UTC](https://forums.developer.nvidia.com/t/how-to-disable-tcu0-uart-port-from-being-used-for-serial-console/155304/3 "2020-10-05T08:36:16Z")

</div>

hello yash.j,

please also refer to [Topic 122047](https://forums.developer.nvidia.com/t/how-can-we-disable-debug-console-on-jetson-xavier/122047/18) and [Topic 145106](https://forums.developer.nvidia.com/t/nx-change-console-to-other-uart/145106/11) to disable bootloader messages.  
thanks

---

<div class="post-metadata">

**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\
**Post date:** [October 18, 2021, 6:43pm UTC](https://forums.developer.nvidia.com/t/how-to-disable-tcu0-uart-port-from-being-used-for-serial-console/155304/5 "2021-10-18T18:43:12Z")

</div>

Closed on October 18, 2021, 6:43pm UTC