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--- products:sbc:common:applications:gpio:uart [2024/08/06 08:27]
nick
+++ products:sbc:common:applications:gpio:uart [2026/09/14 05:22] (current)
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@@ 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 =====
@@ Line 115: / 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>

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