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--- products:sbc:common:applications:gpio:uart [2023/11/07 05:08]
nick [Table]
+++ products:sbc:common:applications:gpio:uart [2024/08/06 08:27] (current)
nick
@@ Line 17: / Line 17: @@
 | :::       | :::         |  16(TX)  |  GPIOD_2   | :::                | :::           |
 ===== Enable UART =====
+==== Linux ====
 In order to use the UART, you need to enable the UART function via [[products:sbc:common:configurations:device-tree-overlay|Device Tree Overlay]].
@@ Line 28: / Line 31: @@
 ```shell
 overlays=pwm_ao_a pwm_f uart3
+```
+After reboot, you will see the UART device node.
+```shell
+$ ls /dev/ttyS3
+/dev/ttyS3
+```
+<tabbox VIM3 with 5.15 kernel>
+Edit ''/boot/dtb/amlogic/kvim3.dtb.overlay.env'' to add uart node to ''fdt_overlays'' node if it doesn't exist.
+e.g. Enable ''UART_C'', you need to add ''uart3'' to node ''fdt_overlays'' if it doesn't exist.
+```shell
+fdt_overlays=uart3
+```
+After reboot, you will see the UART device node.
+```shell
+$ ls /dev/ttyS3
+/dev/ttyS3
+```
+<tabbox VIM3L with 5.15 kernel>
+Edit ''/boot/dtb/amlogic/kvim3l.dtb.overlay.env'' to add uart node to ''fdt_overlays'' node if it doesn't exist.
+e.g. Enable ''UART_C'', you need to add ''uart3'' to node ''fdt_overlays'' if it doesn't exist.
+```shell
+fdt_overlays=uart3
 ```
@@ Line 74: / Line 115: @@
 /dev/ttyS2
 ```
+</tabbox>
+==== Android ====
+<tabbox VIM1S>
+''UART_C'' is enabled by default in ''kvim1s.dts'', The corresponding device node is ''/dev/ttyS2''.
+<tabbox VIM4>
+''UART_E'' is enabled by default, the corresponding dev node is ''/dev/ttyS4''.
+<tabbox VIM3>
+''UART_C'' is enabled by default in ''kvim3.dts'', The corresponding device node is ''/dev/ttyS3''.
 </tabbox>

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