Monthly Archives: April 2014

What is wrong with this code?

Posted on April 27, 2014 by Skye Sweeney

So I spend a few frustrating hours tracking down a bug in this seemingly simple idiot proof code: long labs(long val) { long retval; if (val < 0) { retval = -val; } else { retval = val; } return … Continue reading →

Posted in Software | Comments Off on What is wrong with this code?

Strange bug still comes and goes

Posted on April 23, 2014 by Skye Sweeney

I have this bizzar bug that comes and goes. When connected to the JTAG pod, I never see it. When operating disconnected, it will in fits and starts not boot properly. Since it never seems to happen when connected to … Continue reading →

Posted in ARM, AVC | Comments Off on Strange bug still comes and goes

Spring time is for bugs

Posted on April 18, 2014 by Skye Sweeney

Another frustrating evening. On occasion, my processor will not boot if you press the reset button. You can press then button a hundred times and nothing. And yet it never seems to fail when commanded to reset from JTAG. Since … Continue reading →

Posted in AVC | Comments Off on Spring time is for bugs

Found the nasty bug.

Posted on April 15, 2014 by Skye Sweeney

I was unable to allow the dog to sleep. Had to find the bug or I was not going to be able to sleep.  After a few more occurances, I had enough data to give me reason to suspect I was … Continue reading →

Posted in AVC, uBlock LEA-6H | 2 Comments

Chassing a “Heisenbug”

Posted on April 11, 2014 by Skye Sweeney

I have a crash that occurs at somewhat random times. It may go 20 minutes or it may crash within a few seconds. The blink code on my LED indicates a Prefetch Abort. In other words, the instruction it went … Continue reading →

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Chassing random crashes

Posted on April 9, 2014 by Skye Sweeney

Last night I stopped trying to add more functionality and get to the bottom of these random crashes. If I have lots of GPS data flowing through the system the system will crash in various ways. One way includes a … Continue reading →

Posted in ARM, AVC | Comments Off on Chassing random crashes

Triply derailed

Posted on April 6, 2014 by Skye Sweeney

What a horrible day this has turned out to be.

Posted in ARM, AVC | 2 Comments

Derailed!

Posted on April 6, 2014 by Skye Sweeney

Today I was going to finish the GPS code for the robot when I discovered that my automated backups had not run in a few days. Sure enough I found a bug in my software that does backups. Lets hope … Continue reading →

Posted in AVC, Robotic DVD burner | Comments Off on Derailed!

Hail Marry failed

Posted on April 6, 2014 by Skye Sweeney

Saturday I connected the GPS module and for a few seconds things looked good. But then the dreaded Data Abort exception started to occur. I have yet to narrow the problem down, but it would seem that bad things happen … Continue reading →

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Anticipation, it’s making me wait

Posted on April 5, 2014 by Skye Sweeney

This weekend my goal is to get my uBlox LEA-6 module connected to my ARM processor. I have lots of other things I have to do this weekend (pay bills, …) but with a good following sea I should be … Continue reading →

Posted in AVC | Comments Off on Anticipation, it’s making me wait