[ECOS] odd serial input bug in redboot 095308 20010607 on iP

[Gary Thomas]

On 08-Jun-2001 David Bliss wrote:
> I don't have a gdb for arm/elf; I can probably install it over the weekend if
> it would be useful (which it sounds like it would).  I did not load the eCos

Absolutely useful :-)

> ROMFS; the web page indicates that it's only needed if you want to burn the
> nanox demo to flash.
> 
> I've just installed ecosroms.gz and reinstalled nanoxdemo; same result.
> I guess I'll have to wait until I get an arm/elf debugger set up?
> 
> I do wonder why it's giving me such trouble, though.  I was under the
> impression that this stuff was pretty extensively used.
> 

It is and should be pretty stable.  However, some things are moving targets
and not everything keeps up to date.  The iPAQ has changed somewhat since
I wrote that demo (and the instructions) and not everything may be up to date.

That said, it did run fine for me when I tested it here today.

After you download the nanoxdemo, try running 'cksum' on the image.  Then
compare it with what you get from the host.
        RedBoot> lo -r -d -b 0x20000 nanoxdemo.gz
        Raw file loaded 0x00020000-0x00104a50
        RedBoot> cksum -b 0x20000 -l 0xe4a50
        POSIX cksum = 0x1ba7e900 (463988992)

        $ cksum /tftpboot/nanoxdemo 
        463988992 936528 /tftpboot/nanoxdemo

The numbers in () should match.

Note: I just found out why you were having trouble with the "lo -d" setup
above.  It was because of a buffer overflow in the latest version of RedBoot
on the iPAQ (which you have from June 7 - moving target, remember).  I've now
repaired this and new versions will appear sometime [hopefully soon].  In any
case, you can verify the values against the non-compressed version.