Template:RK3399-HWAccess

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1 Using On-Board Hardware Resources

1.1 Access Serial Interface

For now only UART4 is available for users:

Serial Interface Serial Device
UART0 Used by Bluetooth
UART1 Used by Gbps Ethernet
UART2 Used by Serial Debug Port
UART3 Used by Gbps Ethernet
UART4 Available, device name is /dev/ttyS4 (note: this is only applicable for ROM released after 20180618)

1.2 DTS files

Please refer to DTS files

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