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The board can be forced to boot from the SD card by setting the “
BIOS Disable / Normal Boot
” slider to the “
BIOS
Disable
” position. This will force the RK3399-Q7 module to boot from the SD card.
3.6 USB Serial Console
The evaluation board contains an on-board Silicon Labs CP2102N USB-serial converter. Connect the included Micro-USB
cable to the Micro-USB jack labeled “
USB-UART Bridge
”:
The serial converter does not require additional drivers on Windows and Linux.
For Mac OS, drivers are available from Silicon Labs:
http://www.silabs.com/products/development-tools/software/
usb-to-uart-bridge-vcp-drivers
The Q7 modules has two external UARTs:
• UART0 is, by default, used for the serial console for interactive login.
• UART1 is unused by default and can be freely used for machine-to-machine communications or other purposes.
The switch “
UART0 / UART1
” cross-switches UART0 and UART1 between the “
RS232 / RS485
” jack and the onboard
USB-serial converter:
Switch Position
RS232 / RS485
jack connected to:
USB-serial converter connected to:
UART0
UART0 (interactive console)
UART1
UART1
UART1
UART0 (interactive console)
For interactive login through the USB-serial converter, make sure the switch is on the “
UART1
” position
Picocom can be used to connect via the serial line (assuming the USB-serial converter is USB0):
RK3399-Q7 User Manual
© Theobroma Systems Design und Consulting GmbH
Release v0.2-3-g574c114
Page
9
Содержание RK3399-Q7
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