Octavio Enabling Console Redirection App Note
Contents
1. DIAMOND SYSTEMS cCc O R P O R A T I O N Enabling Console Redirection on Octavio Systems Introduction This application note describes the steps required to be taken to enable console redirection on Diamond Systems Octavio system products The Octavio system products are based on the Diamond Linux 2 6 23 image and default to VGA screen as console output To enable and use a serial port as a console input output there are a few changes that need to be made to the existing Linux configuration files as described in the next section BIOS Changes The console redirection needs to be enabled in the BIOS first The steps to do so are as below for an Athena ll based Octavio system For more information on BIOS changes please refer to the SBC user manual Example of Athena II BIOS option to enable console redirection Under Advanced options Console re direction after POST On Baud rate 19200 or any baud rate that you decide to use Console connection Direct console type PC ANSI Flow Control None COM port address On board COM A of video pages to support 1 Linux OS Changes The Linux OS changes are applicable to all variations of the Octavio systems e Editing GRUB options to allow that portion of Linux to make it through the serial port mount dev hdba1 boot pico boot grub grub conf add the following lines among the first few lines at the top serial unit 1 speed 19200 terminal timeout 8 console s2. erial 1255 Terra Bella Ave Mountain View CA 94043 650 810 2500 Fax 650 810 2525 www diamondsystems com Remove any splash screen if present in bootloader options e For the kernel boot option that you intend to run console redirection on add the following options to that line console ttyO console ttySO 19200n8 NOTE Please note that the baud rate should match with the baud rate setting in the BIOS as well as on the hyper terminal e The next option lets you login via serial terminal pico etc inittab In the DSC BSP DK Linux the option is already there but commented out Un comment it ttySO respawn sbin getty L 19200 ttySO Enabling remote root login via ttySO pico etc securetty On the DSC DK Linux BSP un comment ttySO ttyS1 e Hyper terminal settings In Hyperterminal match the other settings and turn Flow Control off COM1 Properties Port Settings Bits per second PEAN Data bits 6 wt Panty Mone wt Stop bits 1 wt Flow control None w Restore Defaults 19200 No Parity 8 Data Bits 1255 Terra Bella Ave Mountain View CA 94043 650 810 2500 Fax 650 810 2525 www diamondsystems com
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