20
OSD3358-SM-RED Getting Started Guide
Rev. 1.0 9/7/2017
Octavo Systems LLC
Copyright 2017
4.3
Boot messages through UART
The processor on the OSD3358-SM-RED platform sends boot messages through the UART0
port, J3. This is useful in embedded Linux development or if there are boot problems to verify
proper initialization of all components on the board. After boot, the UART0 port will function as a
Linux terminal. Accessing this requires a serial connection to a host device with a serial port. A
USB-UART serial adapter can also be used for host devices with a USB port. A terminal
program, such as Putty is required for communication.
The following steps describe the procedure to access the boot messages during boot and the
terminal through UART0 port using a standard computer/laptop as a host device (Note: Given
the computer/laptop has no native serial ports, a USB-UART serial adapter must be used):
1. Connect the UART side of the adapter to header J3 of the RED board. Make sure to
check for proper orientation of the cable to connect Tx and Rx signals of the UART0 port
appropriately to the adapter’s signals.
Figure 21: UART adapter cable plugged in to RED board
