Author Archives: Skye Sweeney

Long time no post

It has been a while since I last posted. A lot and a little has happened in the meantime. I went on vacation to London and had a great time, but I have not made a huge amount of progress … Continue reading

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Major milestones fall!

Today I was able to check out a few major milestones today. The first is that I determined that I can indeed control the steering servo and ESC via the ARM processor. I was a bit worried that they would … Continue reading

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LSM303 bug fixed!

After several very frustrating days, I have found the root cause of my bad readings. It was not in the sensor or in its setup. It was in fact the the TWI/I2C driver code that I took from the ATMEL … Continue reading

Posted in ARM, AVC, Pololu 9DOF IMU | Leave a comment

Woes with a LSM303DLHC

I have a Pololu 9 DOF IMU (version 2) that uses an LSM303DLLC for the magnetometer and accelerometer. With these two sensors you can create a tilt compensated compass. It was my plan to do exactly that to get heading … Continue reading

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Been to busy to post

Between the work on my robot, my day job, and various projects at home I have not had the chance to post. And yet a lot of things have happened. I will make some attempt to catch up.

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Agoraphobic robot

I have been frustrated by a problem with my robot. Each time I would go outside to test, the robot’s processor would hang. I tried various tactics in getting to the bottom of the problem. The real bummer was that … Continue reading

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Slight pause in the development

The problem with being an embedded software engineer by day and doing prety much the same think at home is that you can get burned out. Not normaly an issue when work is slow or boring. But when you work … Continue reading

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Writing to FLASH

You would think that writing to FLASH would not be such a big thing. But it took several┬ádays to accomplish. The first issue is that your reprogram code can’t live in the same FLASH as you want to program. With … Continue reading

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AVC update

I have been working pretty hard on my AVC entry. In recent days I have a first draft of the navigation code. I have been slowed down by my inability to write configuration data to FLASH. The fisrt step in … Continue reading

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What is wrong with this code?

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

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