[ECOS] Cannot communicate with RedBoot on Viper board

Paul Randall prandall@delta-info.com
Thu Mar 7 12:20:00 GMT 2002


Hi All,

Thanks to Erik for pointing out that I needed a null serial cable to
connect to the Viper and not a pass-through like I was using.  I am now
able to run RedBoot and download and debug the sample eCos applications
using Insight.

I am now having some problems with the Ethernet interface in RedBoot.

Since I don't have a DHCP/BOOTP server, I changed the bootp nickname in
RedBoot from true to false, saved to flash configuration and reset the
board, then set the bootp_my_ip nickname to the IP address I selected
for the Viper.  Then I
saved and reset the board again.  I also set the MAC address in the
fec_esa nickname to 0x00:0x44:0x44:0x44:0x44:0x44.

I have the Viper connected to a hub.  I tried to ping it from a PC I
have connected to the same hub with no response.  Of course, since ping
doesn't work, I can't telnet into the Viper either.

I also tried to ping the PC from the Viper (using the ping -v -n 1 -h
<pc's ip address> command).  In this case, sometimes I get a response
and sometimes I don't.  When I don't get a response, RedBoot locks up (I
can't get the command line back).  It seems like the probability of
getting a response is about 50%.

Has anyone else seen this?

Thanks again for the help.

Paul Randall
Delta Information Systems

Paul Randall wrote:

> Hi All,
>
> I just purchased a A&M Viper board and I am having trouble communicating
> with RedBoot.
>
> I am connected to Serial Port 2 (SMC1) on the Viper and I'm using
> Windows 98 HyperTerminal to communicate with the board.  I'm running
> with the data rate set to 38400 bits per second, 8 data bits, no parity,
> and one stop bit as instructed by the RedBoot documentation.  I have
> flow control turned off.  A&M tech support told me I should see a '+'
> when RedBoot starts up, but I don't get any response at all.  A&M has
> assured me that RedBoot was installed on my board.
>
> When I plug in the Viper, green LEDs D3 and D4 both light up as does LED
> D7.  A&M support suggested I press the reset switches and look for the
> '+' but all that happens is LED D8 turns on for a fraction of a second
> before LED D7 turns back on.
>
> Has anyone seen similar problems with the Viper?  Any suggestions?
>
> Paul Randall
> Delta Information Systems
>
> --
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> and search the list archive: http://sources.redhat.com/ml/ecos-discuss

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