Mindboards

This question is in the context of the NXT++ library. What is the deference between a sonar sensor and a distance sensor? A search for both terms seems to end up with the T-shaped, two "eyed" sensor that came with the mindstorms kit. Under "enum SensorType" there is Touch, Sound,...

Tim, Thanks for the answer. The visual studio 10 project seems to test okay now; but calling the library routine from Eiffel gives the same error as before. The comport seems to be the same; I've built the library with the changed file (I think). Maybe I will try a differenct C library. Or, if someo...

I have found several references on the net where people had similar problems (the bluetooth to NXT worked some and then quit with a "port busy" error), but no cause/solution.

Has anyone here experienced this and been able to fix it?

jjj

Okay, this is the error: Invalid COM port or COM port in use error code: 257 error type: 3 Function "connect" in class "Bluetooth" Now that I have the correct com port (again), it worked once and only once. Now I get this error again, with no changes to code. So, why is the port ...

Well, I had the example working and even had some of the eiffel wrapper working to turn a motor on and off. Now, though, in EiffelStudio I get an "external error" in a C call. Going back to VisualStudio and running the C++ example I get: 'NXT_com.exe': Loaded 'C:\Documents and Settings\jjj...

I now have the example from the com library running in Visual Studio 2010
Thanks for all the helpfull replies.

jjj

Thanks Xander. But I have two questions: 1. What does the c++ code you included do? Was that just to demonstrate how to build the command buffer to send via "send direct command" in fantom? How did you know to include all this? Where is a reference describing how to build the command buffe...

yes, easily with c and c++.

Which framework would you recommend?

I would like to write a library for interfacing Eiffel with the NXT Mindstorms but do not have the required expertise for working with Bluetooth/USB and bytecodes. I know Eiffel but do not understand how to send commands to the processor. I have only been able to wrap the example that came with the ...