Posted by Daniel NIkolov on September 22, 2009 at 11:34pm
I know that most of you guys are partial to ardu pilots but I have seen that some people here roll with the paparazzi system in the planes. I have just started to build an IMU off that site that uses the LPC2148 processor. Well I dont know much about this processor and how to program it, flash the code onto the system, etc...Does anyone here have any ideas as to get me started in the right direction in programming a 9 degree of freedom Inertial Measurement Unit. I know it is a pretty big bite that I bit off but I felt learning to program embedded systems is a pretty good skill I should develop in this hobby and maybe someday a career.
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Explorers may not know the length of their journey until they have completed it - and then made a map for others to follow.
A year ago, I started looking at autopilots. Having worked with Unix and then Linux over 20 years, I was drawn to Paparazzi which installs on my Ubuntu laptop in just a couple of minutes. It is an impressive design and implementation. (I wish that they had stayed with standard languages and did'nt add the OCAML language). But I wanted the IMU piece - and most people at that time were using Infrared sensors on Paparazzi.
With some research it became clear that William Premerlani was the explorer and cartographer. He has openly coded, and written up the Mathematics, and then the "HOW Tos". And when you start to read his work, it is a deep subject requiring a variety of skills. Not only Maths (which is deep), but good understanding of interrupt driven micro-controllers, accelerometers, gyros, and electronic design. Overlayed on this is a careful risk minimisation strategy and attention to safety. That means careful C coding - and slowly but surely, and iteratively growing the design to the point where his UAV-DEVBOARD is now capable of using waypoints.
My suggestion is that you need to understand the size of the knowledge set here. I now beleive that I have a much better understanding than a year ago. And that has been done by reading and reading. But reading is usually not enough. One has has to "do". So I have purchased a Red UAV Devboard, and am installing in a Multiplex Twinstar 2.
My view would be that you gain an idea of what is involved, reading all the documentation for the Red Board.
Replies
Explorers may not know the length of their journey until they have completed it - and then made a map for others to follow.
A year ago, I started looking at autopilots. Having worked with Unix and then Linux over 20 years, I was drawn to Paparazzi which installs on my Ubuntu laptop in just a couple of minutes. It is an impressive design and implementation. (I wish that they had stayed with standard languages and did'nt add the OCAML language). But I wanted the IMU piece - and most people at that time were using Infrared sensors on Paparazzi.
With some research it became clear that William Premerlani was the explorer and cartographer. He has openly coded, and written up the Mathematics, and then the "HOW Tos". And when you start to read his work, it is a deep subject requiring a variety of skills. Not only Maths (which is deep), but good understanding of interrupt driven micro-controllers, accelerometers, gyros, and electronic design. Overlayed on this is a careful risk minimisation strategy and attention to safety. That means careful C coding - and slowly but surely, and iteratively growing the design to the point where his UAV-DEVBOARD is now capable of using waypoints.
My suggestion is that you need to understand the size of the knowledge set here. I now beleive that I have a much better understanding than a year ago. And that has been done by reading and reading. But reading is usually not enough. One has has to "do". So I have purchased a Red UAV Devboard, and am installing in a Multiplex Twinstar 2.
My view would be that you gain an idea of what is involved, reading all the documentation for the Red Board.
Good luck with the learning journey.