core_cmFunc.h missing - Githubissues

ast commented 8 years ago

As referenced from core_cm0plus.h.

I'm trying to learn some DSP on the Teensy LC so it would be super nice if this could be fixed somehow.

Any reason why arm_math.h is hard coded for CORTEX_M4?

Thank you for your work on Teensy. Very much appreciated!

ast commented 8 years ago

So after quite a bit of work I managed to beat arm_math.h into submission and also compile the code in this repo and also compile an example where I use it to do some DSP on the Teensy LC!

In particular I had to revert some of the changes in arm_math.h around line 260. There are also some .h files missing, core_cmFunc.h in particular. I had to include ARMCM0plus.h to get IRQn_Type but I have a feeling this is a bit of an ugly hack and I can see this type is also used in core_cm4.h and there're also some suspiciously similar looking enums in kinetis.h but I for my life I couldn't figure out how it all stayed together :-)

I feel I lack the last pieces of the puzzle to put together a a patch but I'd be more than happy to help!

The big mystery for me now is IRQn_Type...

# arm_math.h
// Teensy LC
#include <stdint.h>
#define __ASM       __asm
#define __INLINE    inline
#define __STATIC_INLINE static inline

# start ugly hack
#define __IM     volatile const      /*! Defines 'read only' structure member permissions */
#define __OM     volatile            /*! Defines 'write only' structure member permissions */
#define __IOM    volatile            /*! Defines 'read / write' structure member permissions */
#include "ARMCM0plus.h" // Has IRQn_Type;
# end ugly hack

#include "core_cm0plus.h"

PaulStoffregen commented 8 years ago

Any reason why arm_math.h is hard coded for CORTEX_M4?

It was an ugly hack done long before Teensy LC existed.

ast commented 8 years ago

If you can give me some insight into IRQn_Type and how you solved that in core_cm4.h I think I will be able to put together a patch... And also if you could commit core_cmFunc.h from the right source.

Thanks for the great work! Have been a big Teensy fan for many years!

PaulStoffregen / arm_math

core_cmFunc.h missing #1