Difference between revisions of "Rockpi4/dev/use-uart-with-kernel-5.10"

Latest revision as of 08:40, 7 June 2022

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-{{rockpi4_header}}
+#redirect [[Rockpi4/dev/use-uart2-as-application-uart]]
-{{Languages|rockpiS/dev/}}
-    [[rockpi4 | ROCK Pi 4]] > [[rockpi4/dev | Development]] > [[Rockpi4/dev/use-uart-with-kernel-5.10 | Use Uart with Kernel 5.10]]
-===Description===
-If you want to use uart with Kernel 5.10 in ROCK Pi 4. You'd better follow these steps.
-==== Install essential package ====
-  sudo apt-get install -y rockpi4-dtbo
-==== UART ====
-Modify file /boot/hw_intfc.conf. Set "on" to enable the optional hardware interfaces while set "off" to disable.
-  intfc:uart2=on
-  intfc:uart4=on
-And add "#" to line "intfc:dtoverlay=console-on-ttyS2"
-  #intfc:dtoverlay=console-on-ttyS2
-  #intfc:dtoverlay=console-on-ttyS4
-but now, the uart2 can still be used as a debug port with system log. If you don't want to output kernel messages, you can disable it as follow.
-Modify file /boot/extlinux/extlinux.conf.
-  append earlyprintk rw init=/sbin/init rootfstype=ext4 rootwait  root=UUID=8650cdca-49b0-4431-9667-5c639f6bab89