Hi Charlie,
We also had significant issues with the TS-BAT3 board. We had to make
a few modifications to the board to get it to run solid.
As you mentioned, there seems to be some problem with the bat3
program. We made an infinite loop in a shell script, similar to your
solution I'm sure.
The next problem we found was the same as yours. After reviewing the
schematics and discussing the issue with TS, it appears that the
problem is with the enable line on the switching regulator (TI-5430).
This line must be high in order to enable the regulator. The problem
lies in that this line is tied to the AVR, which gets its power from
the batteries. When the battery voltage goes below a certain
threshold, the enable line is not held high enough to allow power to
come from the 7-28V input. Cutting this line (Pin 5 of U9) with an
Xacto knife solved this problem.
The next problem was that at random, the BAT3 board would drop the
ball and cause a reboot. We solved this problem, again after
reviewing the schematics, by adding a capacitor to a particular point
on the board. We tried several different capacitances and settled on
a 470uF (YMMV) capacitor across C13. We haven't had any further
problems with random dropouts. It appears the cause for this is the
MOSFET switch gate gets hit and drops below a threshold, causing it to
disconnect power completely from the PC/104 bus.
We've been through your frustrations, Charlie. We were in your
situation, and then with just a few (allbeit frustrating) fixes, the
system was up and running reliably.
I'm actually working on the touch-screen w/ 2.4 kernel problem right
now. I'll post when we find a solution.
- Brad
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