EMC: 03rayh 07TRUNK * 10emc2/docs/src/common/Glossary.lyx: edits and a couple added words
hmm.. I should try wubi one of these days...
of all the things they shouldn't have wasted their time on </mho>
yeah, but it could make emc2 much more attractive as an alternative to other win-blows systems
EMC: 03jepler 07TRUNK * 10emc2/docs/src/hal/comp.lyx: make the 'constant' example compile
EMC: 03jepler 07v2_2_branch * 10emc2/docs/src/hal/comp.lyx: from TRUNK: make the 'constant' example compile
jepler: did you get a chance to see if the 8255 was dead?
skunkworks_: a chance ? I had plenty of time this weekend when I *could have* tried to do something with it, but I did not.
that and the laundry, the two great undone tasks of the weekend :-P
oh, and the dishes on sunday
you're just a procrastinator. :)
wallygl: http://www.cnc-workshop.com/ http://www.cnc-workshop.com/map.htm
wallygl: it's more effective to ask your questions in the channel then in private message
* jepler wanders off again
that guy did not understand how to use irc (he thanked me in private too)
data point: with the driver on the 8.04 live cd and a different computer, adding the read function crashes the system
data point: after removing two DIP 74hct245 chips (bus transceivers), adding the read function does *not* crash the system
this effectively has disconnected the tiger320 chip from the 8255 chips
the tiger320 internal configuration registers are now reading again, though I didn't check today before removing the chips (their values are only printed in my build, not in 2.2.5)
it appears that one of the '245s is used to level-shift the address and control signals to 5V from the voltage the tiger320 uses, probably 3.3v.
the other is used to either gate the data from the tiger320 data bus onto the 8255 data bus or vice versa
it seems to me that if the logic of the '245 direction register isn't right, it might be driving one of the buses at the wrong time
the 245 doesn't have a direction register, just a dir pin
do you know what drives the pin?
btw, that certainly could explain the results you've seen - bus contention if the 8255 side is driving the tiger side a the same time as the tiger is trying to drive back