Karl Heinz Kremer wrote:
> icoms: Write_Read called with 'GI^M'
> About to write 'GI^M' ICOM err 0x0
> icoms: Read called
> icoms: About to return read '<01>' ICOM err 0x0
> icoms: Read returning with 0x0
> icoms: Write_Read Write_Read success, returning '<01>'
That's rather strange. The interface manual lists 'GI' as a valid
command, and as having no possible errors, yet a
"Bad Command" error is returned. Perhaps you instrument has very
old firmware ?
I can code it so this error is ignored, easily enough.
> With some debugging, I figured out that if I let the software continue
> in line 241 in dtp51.c instead of returning ev, I can actually read
> all my color patches.
You would get the same effect by simply omitting the -v flag
from the command line.
> There seems to be something wrong with how the return value is
> determined after sending the "GI" command. I have not yet looked
> deeper into the code to see if I can actually fix the software.
>
> Does X-Rite (or now Gretag) have an API spec for this device that's
> freely available? I checked the web site, but did not find anything.
It's not freely available, although they have been generous enough in
the past in letting interested people sign up as a "Parner", and
making such documents available.
Graeme Gill.
