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Unread 20-02-2007, 22:34
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Re: The 8.2 (or 8.3) Battery Voltage Bug

Quote:
Originally Posted by Mike Betts View Post
Joe and Terry,

If you have not done so already, please get this info to IFI as soon as possible.

Regards,

Mike
I did speak with Tom Watson yesterday. He said I was the first to report it since the new linker script and library files were released. Hopefully Terry has talked to them by now as well.

I did more testing today. I was able to reproduce it with all 2007 components.

We're using a modified version of Kevin's ADC code at 3200hz. We're using his camera code, but without a camera physically installed. The problem will occur consistently if we're using printf to print 20 or so characters per slow loop. I didn't see it when we were not outputting any data.

Last week, I verified that that we could output 40 characters without causing us to slow down the slow loop. However, something may have changed since then, so I need to reverify this.

I suspect that something in our modified ADC code is stomping on something it shouldn't, and that it isn't a widespread issue.

I do have a test setup that I can reproduce the issue on, so I will continue trying to isolate the problem, and hopefully it is just our code.

I still wonder in the back of my mind whether protecting gpr15 doesn't fix the root cause, but only the most common symptom.

Last edited by Joe Ross : 20-02-2007 at 22:37.