Template:RK3399-HWAccess/zh

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1 板载资源的使用

1.1 串口访问

如下表所示，仅 UART4 可供应用程序开发使用：

串口设备 串口资源占用情况
UART0 已被蓝牙占用
UART1 已被千兆以太网占用
UART2 已被作为调试串口
UART3 已被千兆以太网占用
UART4 空闲，设备名称为 /dev/ttyS4 （注：需使用20180618之后的ROM）
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