Some history

I wrote down the development history with some nice pictures of the logikopter and the first revisions of the dragonCopter hardware. See the about page. Having a look back sometimes gives a good prediction what can be anticipated in the future ;-).

New hot sensors

What I currently look at: Invensense has its MPU 9250 coming up, which could be a nice replacement for the MPU-6000 6DOF Gyro/Acc and HMC5883L Compass in one chip package. So, less PCB space occupied and less different parts to source as well as a simpler serial protocol. Looks like the future IMU for quads! Also, I like the new ublox GPS module with an integrated patch antenna, the PAM-7Q. Too sad I am not a facebooker, so I can’t press any like buttons for that one. Both the Invense IMU and ublox GPS are upcoming products which can not be sourced yet, so there a nice candidates for an upcoming design.

Toolchain magic

When I started to develop the dragonCopter, I used Keil Realview MDK Evaluation (Code Size limited to 32KB) and some self-built Eclipse/Codesourcery solution which overcame the 32KB limit, but which did not work very well (especially debugging did not work well when it came to set breakpoints over Segger GDB Server). Since the project will grow out of the 32KB limit when it comes to navigation features, it was time to switch development tools to a free solution. I recently installed Coocox which is a very good eclipse based IDE for ARM Cortex Development. It works together with GCC ARM Embedded which is maintained by ARM developers and seems superior to the Codesourcery Toolchain. Coocox seems very nice, its only drawback so far seems that it is not yet ported to linux. But GCC ARM Embedded is ported to Linux, so development on Linux could be done with another IDE and makefiles for GCC ARM Embedded.

Back again

It has been quite a while since the last post. Becoming a father does not necessarily ramp up your time budget for your hobbies, but abandoning your hobbies does not necessarily make you a better father, because hobbies make you lucky. And when you are lucky, you can be a better father! So, whats up next? I always wanted to implement the navigation features such as GPS position hold/ waypoint navigation and the like. But until now, I only managed to implement a simple barometric height controller, which is a good start for navigation, but not yet the complete solution. So this will be my target for this year. I also switched my blog to the english language, so it is not limited to a german audience anymore.