ChibiOS Free Embedded RTOS

And both projects now take considerable investment in time (and therefore money) to grow.

Yes, pure GPL is a problem for just about every other license. Unfortunate.

I am not sure if this will create problems but if you are still having problems this may be worth a try...

gfxInit() should be performed in your main thread before anything else happens. It internally also calls the ChbiOS init functions halInit() and chSysInit(). Calling it from a separate thread ...

I suspect you are using the uGFX driver as I don't think ChibiOS has any lcd drivers.
If that is the case, can you please repost this in the uGFX forum at http://www.ugfx.org/forum

I recently upgraded my Cygwin toolset and the arm compiler toolchain I am using (to 4.7.4). As I also compile for the windows platform and the same problem occurs I suspect the make in the Cygwin toolset.

Since that upgrade I have had continued problems with building.
The first build attempt works ...

Ahhh. I had a look at why it had no problems with the ../

Because I am creating the object files in the .build/.obj directory, a single level of ../ moves the ChibiOS directory into the .build directory. Everything is still contained nicely out of site and there are still no naming conflicts so ...

Yes it recreates a sub-tree.

For some reason it doesn't seem to have issues with ../ in the path.
From my project directory I reference the ChibiOS path as ../chibios

From my Win32 Makefile adjusted to solve this naming file conflict problem....


# Output directory and files
ifeq ($(BUILDDIR),)
BUILDDIR = .build
endif
ifeq ($(BUILDDIR),.)
BUILDDIR = .build
endif

OBJDIR = $(BUILDDIR)/obj
LSTDIR = $(BUILDDIR)/lst
MAPDIR = $(BUILDDIR)/map

INCDIR ...

This concept of a string of buffers/operations to be performed is actually something that would abstract very well to higher level code and would be a very useful ChibiOS feature.

I struck this when dealing with the ADC. Already ChibiOS splits the buffer in two and allows a half-completion ...

Yes, unfortunately I have been missing in action for a while. I have been doing a lot of work with uGFX and that has been consuming all my spare time.
I will be back soon to make some contributions.