We ended up settling on the Measurement Computing "PC104-LPT\2COM232" board due
to its ability to use IRQ5. (We still have never succeeded in getting IRQ7
into anything but level trigger mode, thus until/unless we can succeed at this,
we need to use IRQ5).
Some notes:
1. If placing the TS-7260 board beneath the PC104-LPT\2COM232, the top of the
big electrolytic cap on 7260 (above the SD-card slot) may make contact with the
pins on the DB-25 header, and that can confuse your troubleshooting.
2. The PC104-LPT\2COM232 uses weaker pull-up resistors than the TS-SER2,
meaning that we had to adjust the signal timing to allow the pull-up more time
to finish.
3. The MC board draws considerably less power that the TS-SER2 (~40 ma).
This is a good time to note that the fine folks at Symmetric Research (makers
of some outstanding ParPort & USB 24bit ADC devices) did a lot to get us
rolling, and they are quite interested in the ARM platform. We couldn't have
done it without them!
cheers
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/ts-7000/join
(Yahoo! ID required)
<*> To change settings via email:
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|