Android 9 Source Code

Edge
24

To sum up, UART2 should be used as a common serial port. The following modifications are required:

  • Firstly, confirm whether the voltage of serial device matches or not.
  • uart2 config:
&uart2 {
	status = "okay";
};

&fiq_debugger {
	rockchip,serial-id = <0xffffffff>;
	status = "okay";
};
  • read and write permission for this serial port is required
--- a/init.rk30board.rc
+++ b/init.rk30board.rc
@@ -229,7 +229,9 @@ on boot
     chmod 0666 /sys/class/wol/rst_mcu
        #add for buzzer
        chmod 0666 /sys/class/w25q128fw/buzzer
-
+       
+       #add for ttyS2
+       chmod 777 /dev/ttyS2
        #add for mac_addr
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