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AID: Bug in AID Firmware

From: mike2004   mike2004acc.ocad.on.ca
Date: Sat, 23 Oct 2004 10:43:02 -0700

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Last week I did some testing around a bug that is appearing in our 
current firmware.

The bug causes the voltage regulator to overheat and shutdown.

I have done the following tests on the same AID mainboard:

1) Powered on a AID board with the bug. Result Regulator over heats and 
shutsdown within 5 secs.

2)Erased the PIC and returned it to the same board. Powers up and 
remains on indefinately without overheating.

3) I would like to write the firmware back to the chip and see if it 
exhibits the bug but the InterAccess PICstart is not working so I 
cannot. This has been a problem for a month now.

Some observations that cannot be confirmed due to the lack of a 
programmer are:

1) a newly programmed PIC seems to function correctly and only fails 
after use. In fact it seems to fail only after use of the AD command.

2) a board I am using only exhibits the problem when I use AD commands 
and does not get stuck in this state. On power up it behaves normally.

It seems to me there is a problem with setting the input or output state 
of the pins after commands are run.

The code is at http://aid.interaccess.org/drupal/?q=book/view/19

Comments please.

Mike

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