Some people have had questions about ArduPilot's FTDI port. Basically, it's a standard FTDI port but we don't use the power pin. That means that you can't power the board from the FTDI cable, and every time you're using the FTDI cable it must be powered by another source, such as your ESC, battery or whatever else you'd normally use. The reason we don't use the FTDI's power is to avoid power conflict with the board when you're using the FTDI cable as a serial monitor during regular ArduPilot… Continue
We have now fully diagnosed the ArduPilot MUX firmware problem, and it turns out there were two problems, not one. The early boards were flashed with the wrong firmware, which was fixed on 1/26, but the boards after that until 2/5 continued to have a second problem, which is that the CKDIV8 fuse in the Attiny45 chip wasn't cleared at the factory, as it was supposed to be. What does the CKDIV8 fuse do? It divides the internal 8Mhz clock speed by 8, so the Attinys ship from the manufacturer with… Continue
For months i have been slowly investigating and "developing" an accurate, efficient nav code (for slow power 8-bit uControllers), finally i just finish my new navigation algorithm, is super faster and smaller.... =).
Before the functions were like this:
int get_gps_course(float flat1, float flon1, float flat2, float flon2)
//I've to spplit all the calculation in…Continue
We've been describing ArduPilot as a navigation-only autopilot and saying that it needs the FMA Co-Pilot to provide stabilization. But that's actually not true--we just hadn't written the stabilization code yet. ArduPilot is powerful enough to handle both functions,… Continue
This is the first post in what I hope will be a mini-series on doing hardware-in-the-loop simulations with ArduPilot. A simulation is something you do to test your autopilot on the ground, where you won't get in trouble. It's an absolutely necessary thing when you're… Continue
Great day of flight testing ArduPilot today. Jordi and I were joined by Jack Poller, and we spent the whole day debugging code, tweaking gains and otherwise building towards the aim of the day, fully autonomous flight. Good news: ArduPilot works great in the air, we… Continue
ArduPilot code, modified version for use on Microsoft Visual Studio. Compatibility with Arduino studio still maintained.
Also contains parser of KML files, for importing fly paths drawn in Google Earth.
We fixed some bugs in the ArduPilot's failsafe code, which runs on the board's second processor, an Attiny45. It now works great, and has a secret "reboot the autopilot" feature. Just toggle the autopilot enable switch on your transmitter five times fast, and it will reset the Atmega168. Great for times when you don't want to land just because a random bug froze the autopilot. Otherwise it just does what it's supposed to do: transfer control from RC to autopilot and back again on command--every… Continue
Just got the first batch of ArduPilot production boards. They're tiny--smaller than a key! Jordi is in San Francisco this weekend and we're going to spend the weekend testing them, including in the air. Hope to have videos next… Continue