Category Archives: AVC

On watchdog timers

For many embedded software engineers, the watchdog timer is something that is designed in at the end. The thought is you just turn it on prior to shipping and “She’ll be right”. But this is a terrible travesty.

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XBee radios

I had gotten a pair of 1 mW XBee radios a while ago. I had wanted to use them to communicate with my robot while it was running. Normally I use an RS-232 cable in the lab, but in the … Continue reading

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IMU heater

I am using a Pololu 9-DOF module as the IMU for my robot. Its a very small device (1.0*0.8″) using MEMS bases gyro, accelerometer, and magnetometers. The trouble is these sensors have some drawbacks. The first is that MEMS sensors … Continue reading

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It has been a while

Life got in the way. I hate it when it does that. Why can’t things like work, taxes, dishes, and doctors appointments just take care of themselves? Why must I be involved? But over the last few weeks I got … Continue reading

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Interesting bugs

Over the last few months, I have been sending to my software group at work a puzzle/quiz in the form of a bug I have found in my robot code. They seem to get a kick out of especialy since … Continue reading

Posted in AVC, Personal, Software | 4 Comments

Data collection. 1 of n

Today I took my robot to my test area. I collected two battery packs worth of data. I am now begging the long process of analyzing 15 megabytes of binary log files. Oh Joy! No sarcasm here. I love data. … Continue reading

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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

Posted in ARM, AVC, Uncategorized | Leave a comment

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

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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

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