SoM-5282 FAQ
1/26/07
NZG

Question:
****************************************************************
I'm getting a login prompt, but the default login
user:root
password: emac_inc doesn't work.
Whats wrong?
Answer:
****************************************************************
One of two things, 
either:
1. You have your terminal program set up to send linefeeds and they are being interpreted as part of the password - solution: turn them off, this is an option in pretty much every terminal program.

2. You have changed the default password, remove the SoM-5282EM from it's socket and replace it. This will clear the internal Static RAM and reset the password to it's default setting.


Question:
****************************************************************
Is there any sort of document explaining how to reflash the OS?

Answer:
****************************************************************
Yes, the README.Coldboot document contains this information.
ftp://ftp.emacinc.com/LegacyProducts/som/SoM-5282M/Driver/Das-Uboot/
/Das-Uboot/README.ColdBoot

In summary:
The OS package is transferred to the board via tftp
setenv ipaddr (valid IP address for you network)
setenv serverip (IP address of the tftp server)
tftp 20000 yourpackage.pkg 

and booted with 
bootm 20000

or loaded into flash by 
erase ffe40000
cp.b 20000 ffe40000 (package length in hex)

More detailed explanations and commands can be found in the Coldboot README  linked above.

Note of TFTP.
To do a TFTP transfer, you will need to have a  TFTP server installed that points to the directory containing packages on you network , such as tftp32.
This will be incoportated into the EMAC- Open-Tools package in a future release. 


Question:
****************************************************************
What is the proper way to access the u-boot environment.

Answer:
****************************************************************
Typically it's done directly through u-boot.
By hitting enter during the boot sequence u-boot will give you a prompt
from 
which you can do a number of things, 
including:
setenv - set a variable
printenv - display all variables
saveenv - commit all variables to flash

ftp://ftp.emacinc.com/LegacyProducts/som/SoM-5282M/Driver/Das-Uboot/
/Das-Uboot/README.ColdBoot


Question:
****************************************************************
I'm unable to find a reference to the BDM adapter on the EMAC web
site, where can I acquire one.

Answer:
****************************************************************
We don't sell it directly at the moment.
P&E sells several versions of it.
http://www.pemicro.com/
You will need one of the 3.3 volt variety

We use the "wiggler" in house
http://www.pemicro.com/index.cfm?targetURL=http://www.pemicro.com/produc
ts/products_find.cfm
but this is plenty fast unless your programming 1000 of the things.


Question:
****************************************************************
m68k toolchain fails to install, responds with
cannot open '+43" for reading: No such file or directory


Answer:
*************************************************************
This script is simply extracted an inline tarball.
Use the m68ktools tarball and extract it into /
with tar -xzvf