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--- products:sbc:common:applications:gpio:uart [2023/11/07 05:09]
nick [Enable UART]
+++ products:sbc:common:applications:gpio:uart [2026/09/15 03:27] (current)
nick
@@ Line 16: / Line 16: @@
 ^  VIM1S    |  UART_C     |  15(RX)  |  GPIOD_3   |  uart_c            |  /dev/ttyS2   |
 | :::       | :::         |  16(TX)  |  GPIOD_2   | :::                | :::           |
+^  VIM-5    |  UART_AO_E  |  15(RX)  |  GPIOD_9   |  uart_ao_e         |  /dev/ttyS4   |
+| :::       | :::         |  16(TX)  |  GPIOD_8   | :::                | :::           |
 ===== 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 112: / Line 117: @@
 /dev/ttyS2
 ```
+<tabbox VIM-5>
+Edit ''/boot/dtb/amlogic/kvim-5.dtb.overlay.env'' to add uart node to ''fdt_overlays'' node if it doesn't exist.
+e.g. Enable ''UART_AO_E'', you need to add ''uart_ao_e'' to node ''fdt_overlays'' if it doesn't exist.
+```shell
+fdt_overlays=uart_ao_e
+```
+After reboot, you will see the UART device node.
+```shell
+$ ls /dev/ttyS4
+/dev/ttyS4
+```
+</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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